Research Publications

1.     A highly efficient and green adsorbent for anionic dyes synthesized from whole pine needles modified with glycidyltrimethylammonium chloride: Synthesis, kinetic and thermodynamic investigation, Biomass Conversion and Biorefinery (Springer Nature) (Accepted manuscript)  https://doi.org/10.1007/s13399-023-04776-8 Impact Factor: 4.05.

2.         KMnO4-oxidized whole pine needle-based adsorbent for selective and efficient removal of cationic dyes, Babita Kumari, Ghanshyam S Chauhan, Sunita Ranote, Pooja Jamwal, Rajesh Kumar, Kiran Kumar, Sandeep Chauhan, International Journal of Phytoremediation (Taylor & Francis) Accepted Manuscript 2023 https://doi.org/10.1080/15226514.2023.2231555 Impact Factor: 3.70.

3.         Combustion-Synthesized ZnO-CeO2 Heterojunctions for Advanced Photocatalytic Dye Degradation, Manikanika, Lalita Chopra, Rajesh Kumar, Inorganic Chemistry Communications (Elsevier), 160, 111896 February 2024. https://doi.org/10.1016/j.inoche.2023.111896 Impact Factor: 3.8.

4.         Unveiling the potential of PANI@MnO2@rGO ternary nanocomposite in energy storage and gas sensing, Ahmad Umar, Sheikh Akbar, Rajesh Kumar, Faheem Ahmed, Sajid Ali Ansari, Ahmed A Ibrahim, Mohsen A Alhamami, Noura Almehbad, Hassan Algadi, Tubia Almas, Wen Zeng, Chemosphere (Elsevier), 349, 140657, February 2024 https://doi.org/10.1016/j.chemosphere.2023.140657 Impact Factor: 8.8.

5.         Ce-doped ZnO nanostructures: A promising platform for NO2 gas sensing, Ahmad Umar, Sheikh Akbar, Rajesh Kumar, Jesse Nii Okai Amu-Darko, S Hussain, Ahmed A Ibrahim, Mohsen A Alhamami, Noura Almehbad, Tubia Almas, Amal F Seliem, Chemosphere (Elsevier), 349, 140838, February 2024 https://doi.org/10.1016/j.chemosphere.2023.140838  Impact Factor: 8.8.

6.         Cadmium sulfide quantum dots decorated reduced graphene oxide: A versatile platform for highly sensitive acetylacetone sensor, Ahmad Umar, Rajesh Kumar, Ahmed A Ibrahim, Mohsen AM Alhamami, M Shaheer Akhtar, MRS Communications (Springer International Publishing), 13 (6), 1335–1341 https://doi.org/10.1557/s43579-023-00462-y Impact Factor: 1.90.

7.         Photocatalytic degradation efficiencies of ZnO nanoparticles and CeO2 nanosheets synthesized via combustion method, Manikanika, Lalita Chopra, Rajesh Kumar, Bulletin of Material Science (Springer Science+Business Media) 46, 181 December 2023 https://doi.org/10.1007/s12034-023-03028-9. Impact Factor: 1.80.

8.         Polyethylene glycol embedded reduced graphene oxide supramolecular assemblies for enhanced room-temperature gas sensors, Ahmad Umar, Rajesh Kumar, Pravin S More, Ahmed A Ibrahim, Hassan Algadi, Mohsen A Alhamami, Sotirios Baskoutas, Sheikh Akbar, Environmental Research (Elsevier) 236 (2) 116793, November 2023. https://doi.org/10.1016/j.envres.2023.116793 Impact Factor: 8.30.

9.         Synthesis and characterizations of ZIF-8/GO and ZIF-8/rGO composites for highly sensitive detection of Cu2+ ions, Eunbi Kim, Ahmad Umar, Sadia Ameen, Rajesh Kumar, Ahmed A Ibrahim, Mohsen AM Alhamami, MS Akhtar, Sotirios Baskoutas, Surfaces and Interfaces (Elsevier) 41, 103163, October 2023, https://doi.org/10.1016/j.surfin.2023.103163 Impact Factor: 6.20.

10.  Metal Oxides-Based Nano/microstructures for Photodegradation of Microplastics, Rajesh Kumar, Advanced Sustainable Systems (Wiley-VCH GmbH), 7 (6) 2300033, June 2023. https://doi.org/10.1002/adsu.202300033 Impact Factor: 6.737.

11.  Effective Fluorescence Detection of Hydrazine and the Photocatalytic Degradation of Rhodamine B Dye Using CdO-ZnO Nanocomposites, Ahmad Umar, Ramesh Kumar, Mohinder Singh Chauhan, Rajesh Kumar, Ahmed A Ibrahim, Mohsen AM Alhamami, Hassan Algadi, Mohammad Shaheer Akhtar, Coatings (MDPI), 12 (12) 1959, December (2022) https://doi.org/10.3390/coatings12121959 Impact Factor: 3.236.

12.  Photocatalytic degradation of methyl orange based on manganese substituted bismuth ferrite nanoparticles, Ahmad Umar, S Ruby, SSR Inbanathan, D Rani Rosaline, Rajesh Kumar, Hasan Algadi, Ahmed A Ibrahim, Pau Loke Show, S Baskoutas, Emerging Materials Research, 11(4), 1-8 December (2022) https://doi.org/10.1680/jemmr.22.00037. Impact Factor: 1.795.

13.  Cellulose nanocrystals-based delivery vehicles for anticancer agent curcumin, Rajesh Kumar, Sandeep Chauhan, International Journal of Biological Macromolecules, 221, 842-864, November (2022). https://doi.org/10.1016/j.ijbiomac.2022.09.077 Impact Factor: 8.025.

14.  Enhanced sunlight-driven photocatalytic, supercapacitor and antibacterial applications based on graphene oxide and magnetite-graphene oxide nanocomposites, Ahmad Umar, S Ashok Kumar, SSR Inbanathan, Maryam Modarres, Rajesh Kumar, Hassan Algadi, Ahmed A Ibrahim, Rune Wendelbo, R Packiaraj, Mohsen AM Alhamami, S Baskoutas, Ceramics International 48 (19), 29349-29358 October (2022) https://doi.org/10.1016/j.ceramint.2022.05.371 Impact Factor: 5.532.

15.      Ti3C2Tx MXene-As Electrocatalyst for Designing Robust Glucose Biosensors, Rajesh Kumar, Lakhveer Singh, Advanced Materials Technologies 7 (12) 2200151, December (2022). https://doi.org/10.1002/admt.202200151  Impact Factor: 8.856.

16.  Nano/micro-scaled materials based optical biosensing of glucose, Rajesh Kumar, Sandeep Chauhan, Ceramics International, 48 (3), 2913-2947 February (2022). https://doi.org/10.1016/j.ceramint.2021.10.170 Impact Factor: 5.532.

17.  Highly sensitive and selective 2-nitroaniline chemical sensor based on Ce-doped SnO2 nanosheets/Nafion-modified glassy carbon electrode, Ahmad Umar, Rajesh Kumar, Hassan Algadi, Jahir Ahmed, Mohammed Jalalah, A. A. Ibrahim, Farid A. Harraz, Mabkhoot A. Alsaiari, Hasan Albargi, Advanced Composites and Hybrid Materials, 4, 1015–1026, December (2021). https://doi.org/10.1007/s42114-021-00283-4 Impact Factor: 11.860.

18.  Aluminum Doped ZnO Nanorods for Enhanced Phenylhydrazine Chemical Sensor Applications, Ahmad Umar, Ahmad A. Ibrahim, R. Kumar, Kulbhushan Rana, Hasan Algadi, Mohsen A. M. Alhamami, Majdolin M. E. Elsddig, and Ayeda Y. A. Mohammed, Science of Advanced Materials 13, 2483–2488, December (2021). https://doi.org/10.1166/sam.2021.4168. Impact Factor: 1.067.

19.      Cauliflower-Shaped ZnO Nanostructure for Enhanced NO2 Gas Sensor Application, Ahmad Umar, Jay Singh, Ahmad A. Ibrahim, R. Kumar, Prabhakar Rai, Alok Kumar Rai, Hasan Algadi, Mohsen A. M. Alhamami, and Majdolin M. E. Elsddig, Science of Advanced Materials 13, 2358–2363, December (2021). https://doi.org/10.1166/sam.2021.4167. Impact Factor: 1.067.

20.  Spindle-like Co3O4-ZnO Nanocomposites Scaffold for Hydrazine Sensing and Photocatalytic Degradation of Rhodamine B Dye, Ramesh Kumar, Ahmad Umar, Rajesh Kumar, MS Chauhan, Girish Kumar, Suvarcha Chauhan, Engineered Science, 16, 288–300 October (2021). https://doi.org/10.30919/es8d548. Impact Factor: -------. 

21.  Co-Doped ZnO Nano-Agglomerates as a Potential Scaffold for Non-Enzymatic Hydrogen Peroxide Sensing, Ahmad Umar, Ramesh Kumar, Rajesh Kumar, Ahmed A. Ibrahim, Mohsen A. M. Alhamami, Hassan Algadi, Suvarcha Chauhan, and M. S. Chauhan, Science of Advanced Materials 13, 1732–1738, September (2021). https://doi.org/10.1166/sam.2021.4106. Impact Factor: 1.067.

22.      CdO-ZnO nanorices for enhanced and selective formaldehyde gas sensing applications, Ahmad Umar, Ahmed A. Ibrahim, Rajesh Kumar, Hassan Algadi, Hasan Albargi, Wen Zeng, F.Ahmad, and Sheikh Akbar, Environmental Research, 200, 111377, September (2021). https://doi.org/10.1016/j.envres.2021.111377 Impact Factor: 8.431.

23.  Ultrathin Leaf-Shaped CuO Nanosheets Based Sensor Device for Enhanced Hydrogen Sulfide Gas Sensing Application, Ahmad Umar, Hassan Algadi, Rajesh Kumar, Mohammad Shaheer Akhtar, Ahmed A Ibrahim, Hasan Albargi, Mohsen AM Alhamami, Turki Alsuwian, Wen Zeng, Chemosensors, 9(8), 221, August (2021). https://doi.org/10.3390/chemosensors9080221 Impact Factor: 4.229

24.      α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device, Ahmad Umar, Ahmed A Ibrahim, Rajesh Kumar, Hassan Algadi, Hasan Albargi, Faheem Ahmad, Wen Zeng, M Shaheer Akhtar, Coatings, 11(7), 860, July (2021). https://doi.org/10.3390/coatings11070860  Impact Factor: 3.236.

25.  Low-temperature synthesis of cadmium-doped zinc oxide nanosheets for enhanced sensing and environmental remediation applications, Ramesh Kumar, Ahmad Umar, Rajesh Kumar, Dilbag Rana, M.S. Chauhan, Journal of Alloys and Compounds, 863, 158649, May (2021). https://doi.org/10.1016/j.jallcom.2021.158649 Impact Factor: 6.371.

26.      Methylene blue intercalated layered MnO2 nanosheets for high-sensitive non-enzymatic ascorbic acid sensor, P. Paulraj, Ahmad Umar, K. Rajendran, A. Manikandan, A. Sathamraja, Rajesh Kumar, E. Manikandan, K. Pandian, S. Baskoutas, Hassan Algadi, Ahmed A. Ibrahim & Mabkhoot A. Alsaiari, Journal of Materials Science: Materials in Electronics 32(7), 8317-8329, March (2021). https://doi.org/10.1007/s10854-021-05391-x Impact Factor: 2.779.

27.      Gas sensor device for high-performance ethanol sensing using α-MnO2 nanoparticles, Ahmad Umar, Ahmed A Ibrahim, Rajesh Kumar, H Albargi, Wen Zeng, Mohsen Ali M Alhmami, Mabkhoot A Alsaiari, S Baskoutas, Materials Letters, 286, 129232 March (2021). https://doi.org/10.1016/j.matlet.2020.129232 Impact Factor: 3.574.

28.      ZnO–SnO2 nanocubes for fluorescence sensing and dye degradation applications, Ramesh Kumar, Ahmad Umar, Rajesh Kumar, MS Chauhan, Yas Al-Hadeethi, Ceramics International, 47(5), 6201-6210 March (2021). https://doi.org/10.1016/j.ceramint.2020.10.198 Impact Factor: 5.532.

29.      Colloidal Synthesis of NiMn2O4 nanodisks decorated reduced graphene oxide for electrochemical applications, Ahmad Umar, M.S. Akhtar, Sadia Ameen, M. Imran, Rajesh Kumar, Yao Wang, Ahmed A. Ibrahim, H. Albargi, Mohammed Jalalah, Mabkhoot A. Alsaiari, M.S. Al-Assiri, Microchemical Journal, 160(A), 105630 January (2021). https://doi.org/10.1016/j.microc.2020.105630 Impact Factor: 5.304.

30.      Cubic shaped hematite (α-Fe2O3) micro-structures composed of stacked nanosheets for rapid ethanol sensor application, Ahmad Umar, Ahmed A. Ibrahim, Rajesh Kumar, Hasan Albargi, Mabkhoot A. Alsaiari, Faheem Ahmed, Sensors and Actuators B: Chemical, 326, 128851 January (2021). https://doi.org/10.1016/j.snb.2020.128851 Impact Factor: 9.221.

31.      Electrochemical oxygen evolution reaction catalyzed by cobalt oxide (Co3O4) nanodisks, Ahmad Umar, Mohammad Qamar, Rajesh Kumar, Ahmed A. Ibrahim, Mohsen Ali M. Alhmami, Tubia Almas, Ayeda Y. A. Mohammed, Nikolaos Bouropoulos, S. Baskoutas, Munzir H. Suliman, and Qasem A. Drmosh, Science of Advanced Materials 12, 1889–1895, December (2020). Impact Factor: 1.067.

32.      Solid-state synthesis of Ag-doped PANI nanocomposites for their end-use as an electrochemical sensor for hydrogen peroxide and dopamine, P. Paulraj, Ahmad Umar, K. Rajendran, A. Manikandan, R. Kumar, E. Manikandan, K. Pandian, Mater H. Mahnashi, Mabkhoot A. Alsaiari, Ahmed A. Ibrahim, Nikolaos Bouropoulos, Sotirios Baskoutas, Electrochimica Acta, 363, 137158 December (2020). https://doi.org/10.1016/j.electacta.2020.137158 Impact Factor: 7.336.  

33.      Efficient H2 gas sensor based on 2D SnO2 disks: Experimental and theoretical studies, Ahmad Umar, H.Y. Ammar, Rajesh Kumar, Tubia Almas, Ahmed A. Ibrahim, M.S. AlAssiri, M. Abaker, S. Baskoutas, International Journal of Hydrogen Energy, 45 (50), 26388 October (2020). https://doi.org/10.1016/j.ijhydene.2019.04.269  Impact Factor: 7.139.

34.  NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review, Rajesh Kumar, Nano-Micro Letters, 12, 122, June (2020). https://doi.org/10.1007/s40820-020-00462-w Impact Factor: 23.655.

35.      An efficient chemical sensor based on CeO2 nanoparticles for the detection of acetylacetone chemical, Ahmad Umar, Tubia Almas, Ahmed A. Ibrahim, Rajesh Kumar, M. S. Al Assiri, S. Baskoutas, M. Shaheer Akhtar, Journal of Electroanalytical Chemistry, 864, 114089, May (2020). https://doi.org/10.1016/j.jelechem.2020.114089 Impact Factor: 4.598.

36.      Fern shaped La2O3 nanostructures as potential scaffold for efficient hydroquinone chemical sensing application, Ahmad Umar, A.A. Ibrahim, Rajesh Kumar, Tubia Almas, Priyanka Sandal, M.S. Al-Assiri, M.H. Mahnashi, B.Z. AlFarhan, S, Baskoutas, Ceramics International, 46 (4) 5141-5148, March (2020). https://doi.org/10.1016/j.ceramint.2019.10.258 Impact Factor: 5.532.

37.      Square disks‐based crossed architectures of SnO2 for ethanol gas sensing applications-An experimental and theoretical investigation, Ahmad Umar, H.Y. Amma, Rajesh Kumar, A.A. Ibrahim, M.S. Al-Assiri, Sensors and Actuators B: Chemical, 304, 127352 February (2020). https://doi.org/10.1016/j.snb.2019.127352 Impact Factor: 9.221.

38.      Iron-doped titanium dioxide nanoparticles as potential scaffold for hydrazine chemical sensor applications, Ahmad Umar, Farid A. Harraz, Ahmed A. Ibrahim, Tubia Almas, Rajesh Kumar, M.S. Al-Assiri and S. Baskoutas, Coatings, 10, 182, February (2020). Impact Factor: 3.236.

39.      Poly(2-acrylamido-2-methylpropane sulfonic acid) and poly(acrylonitrile)-co-grafted cellulose for heavy metal ions sorption applications, Rajesh Kumar, Rajeev Kr. Sharma, Trends in Carbohydrate Research, January (2020), 12(1), 23-32. Impact Factor: 0.38.

40.      Synthesis and characterization of guar gum-based cross-linked graft copolymers for the adsorption of Cu2+ ions from aqueous solution, Rajeev Kr. Sharma, Rajesh Kumar, Trends in Carbohydrate Research, December (2019), 11(4), 15-27. Impact Factor: 0.38.

41.      High sensitive and low-concentration sulfur dioxide (SO2) gas sensor application of heterostructure NiO-ZnO nanodisks, Qu Zhou, Wen Zeng, Weigen Chen, Lingna Xu, Rajesh Kumar, Ahmad Umar, Sensors and Actuators B: Chemical, 298, 126870. November (2019). https://doi.org/10.1016/j.snb.2019.126870 Impact Factor: 9.221.    

42.      Nitroaniline chemi-sensor based on bitter gourd shaped ytterbium oxide (Yb2O3) doped zinc oxide (ZnO) nanostructures, Ahmad Umar, Ahmed A. Ibrahim, Rajesh Kumar, Tubia Almas, M.S. Al-Assiri, S. Baskoutas, Ceramics International, 45(11) (13825-13831), August (2019). https://doi.org/10.1016/j.ceramint.2019.04.079 Impact Factor: 5.532.

43.      Functionalized cellulose with hydroxyethyl methacrylate and glycidyl methacrylate for metal ions and dye adsorption applications, Rajeev Kr Sharma, Rajesh Kumar, International Journal of Biological Macromolecules, 134, 704-721 August (2019). https://doi.org/10.1016/j.ijbiomac.2019.05.059 Impact Factor: 8.025.

44.  Grafting of cellulose with with N-isopropylacrylamide and glycidyl methacrylate for efficient removal of Ni(II), Cu(II) and Pd(II) ions from aqueous solutions, Rajesh Kumar, Rajeev Kr. Sharma, Anirudh P. Singh, Separation and Purification Technology, 219, 249–259, July (2019). https://doi.org/10.1016/j.seppur.2019.03.035 Impact Factor: 9.136.

45.      Synthesis and characterization of cellulose based adsorbents for removal of Ni(II), Cu(II) and Pb(II) ions from aqueous solutions, Rajesh Kumar, Rajeev Kr. Sharma, Reactive and Functional Polymers, 140, July 2019, (82-92). https://doi.org/10.1016/j.reactfunctpolym.2019.04.014 Impact Factor: 4.966.

46.      Synthesis and characterization of cellulose based graft copolymers with binary vinyl monomers for efficient removal of cationic, anionic dyes and lead ions, Rajesh Kumar, Rajeev Kr Sharma, Anirudh P Singh, Journal of Polymer Research, June 2019, 26, 135. https://doi.org/10.1007/s10965-019-1790-9 Impact Factor: 3.061.

47.      Sorption of Ni(II), Pb(II) and Cu(II) ions from aqueous solutions by cellulose grafted with poly(HEMA-co-AAc): Kinetic, isotherm and thermodynamic study, Rajesh Kumar, Rajeev Kr. Sharma, Anirudh P. Singh, Journal of Environmental Chemical Engineering 7 (3), 103088, June (2019). https://doi.org/10.1016/j.jece.2019.103088 Impact Factor: 7.968.

48.      Metal ions and organic dyes sorption applications of cellulose grafted with binary vinyl monomers, Rajeev Kr. Sharma, Rajesh Kumar, Anirudh P. Singh, Separation and Purification Technology 209, 684–697, January (2019). https://doi.org/10.1016/j.seppur.2018.09.011 Impact Factor: 9.136.

49.      Removal of organic dyes and metal ions by cross-linked graft copolymers of cellulose obtained from the agricultural residue, Rajesh Kumar, Rajeev Kr Sharma, Anirudh P Singh, Journal of Environmental Chemical Engineering 6, 6037–6048, October (2018).  https://doi.org/10.1016/j.jece.2018.09.021 Impact Factor: 7.968.

50.      Methanol Gas Sensor Based on ZnO–SnO2 Hollow Urchins, Ahmad Umar, M. S. Akhtar, S. H. Kim, R. Kumar, H. Fouad, and Othman Y. Alothman, Nanoscience and Nanotechnology Letters 10 (10), 1405–1411, October (2018). Impact Factor: 1.128.

51.      Grafted cellulose: a bio-based polymer for durable applications, Rajesh Kumar, Rajeev Kr Sharma, Anirudh P Singh, Polymer Bulletin 75, 2213–2242, May (2018). https://doi.org/10.1007/s00289-017-2136-6 Impact Factor: 2.843.

52.  Ag-doped ZnO nanoparticles for enhanced ethanol gas sensing application, Ahmad Umar, M. Ajmal Khan, Rajesh Kumar, H. Algarni, Journal of Nanoscience and Nanotechnology, 18 (5), 3557–3562, May (2018). Impact Factor: 1.354.

53.  Extraction of cellulose micro-whiskers from rice husk: A greener approach, Rajeev Kr. Sharma, Rajesh Kumar, and Anirudh P. Singh, Journal of Nanoscience and Nanotechnology, 18 (5) 3702–3708, May (2018). Impact Factor: 1.354.

54.  Fabrication and characterizations of ethanol sensor based on CuO nanoparticles, Yas Al-Hadeethi, Ahmad Umar, Rajesh Kumar, Saleh. H. Al-Heniti, Bahaaudin M. Raffah, Journal of Nanoscience and Nanotechnology, 18 (4) 2892–2897, April (2018). Impact Factor: 1.354.

55.  Fabrication and characterization of highly sensitive and selective alcohol sensors based on porous NiO nanodisks, Qu Zhou, Ahmad Umar, El Mehdi Sodki, Aziz Amine, Lingna Xu, Yingang Gui, Ahmed A. Ibrahim, Rajesh Kumar, S. Baskoutas, Sensors and Actuators B: Chemical, 259, 604–615 April (2018). https://doi.org/10.1016/j.snb.2017.12.050 Impact Factor: 9.221.

56.      Hydroquinone Sensor Based on Neodymium (Nd) Doped ZnO Hexagonal Nanorods, Yas Al-Hadeethi, Ahmad Umar, Ahmed A. Ibrahim, Rajesh Kumar, Saleh. H. Al-Heniti, and Bahaaudin M. Raffah, Nanoscience and Nanotechnology Letters 10 (3), 351-357, March (2018). Impact Factor: 1.128.

57.      Highly Sensitive Carbon Monoxide (CO) Gas Sensors Based on Ni and Zn Doped SnO2 Nanomaterials, Qu Zhou, Weigen Chen, Lingna Xu, Rajesh Kumar, Yingang Gui, Zhongyong Zhao, Tao Tang, Shiping Zhu, Ceramics International, 44 (4) 4392-4399 March (2018). Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2017.12.038

58.  Pt nanoparticles decorated SnO2 nanoneedles for efficient CO gas sensing applications, Qu Zhou, Lingna Xu, Ahmad Umar, Weigen Chen, Rajesh Kumar, Sensors and Actuators B: Chemical, 256, 656–664, March (2018). Impact Factor: 9.221. https://doi.org/10.1016/j.snb.2017.09.206

59.      Highly sensitive and selective non-enzymatic mono and disaccharide sugars sensing based on carbon paste electrodes modified with perforated NiO nanosheets, Ahmed A. Ibrahim,  El Mehdi Sodki,  Ahmad Umar,  Aziz Amine,  Rajesh Kumar,  M. S. Al-Assiri,  A. E. Al-Salami  and  S.Baskoutas, New Journal of Chemistry (RSC), 42 (2) 964-973, January (2018). Impact Factor: 3.925. https://doi.org/10.1039/C7NJ03253F

60.      Morphologically-dependent photocatalytic and gas sensing application of Dy-doped ZnO nanoparticles, Sonik Bhatia, Neha Verma, Rajesh Kumar, Journal of Alloys and Compounds 726, 1274-1285 December (2017). Impact Factor: 6.371. https://doi.org/10.1016/j.jallcom.2017.08.048

61.  Two-dimensional ytterbium oxide nanodisks based biosensor for selective detection of urea, Ahmed A. Ibrahim, Rafiq Ahmad, Ahmad Umar, M.S. Al-Assiri, A.E. Al-Salami, Rajesh Kumar, S.G. Ansari, S. Baskoutas, Biosensors and Bioelectronics, 98, 254-260 December (2017). Impact Factor: 12.515. https://doi.org/10.1016/j.bios.2017.06.015

62.  In-Doped ZnO Hexagonal Stepped Nanorods and Nanoflowers as Potential
Scaffold for Highly-Sensitive Phenyl Hydrazine Chemical Sensors, Ahmad Umar, Sang Hoon Kim, Rajesh Kumar, Mohammad S. Al-Assiri, A.
E. Al-Salami, Ahmed A. Ibrahim, Sotirios Baskoutas, Materials, 10, 1337 November (2017). Impact Factor: 3.748. https://doi.org/10.3390/ma10111337

63.      Ag-doped ZnO nanoellipsoids based highly sensitive gas sensor, Changxiang Hong, Qu Zhou, Zhaorui Lu, Ahmad Umar, Rajesh Kumar, Zhijie Wei, Xiaodong Wu, Lingna Xu, and S. H. Kim, Materials Express, 7 (5), 380–388, October (2017). Impact Factor: 1.650.

64.      CuO nanosheets as potential scaffolds for gas sensing applications, Ahmad Umar, A.A. Alshahran, H. Algarni, Rajesh Kumar, Sensors and Actuators-B: Chemical, 250, 24-31 October (2017)   Impact Factor: 9.221. https://doi.org/10.1016/j.snb.2017.04.062

65.      Fabrication and characterization of highly sensitive acetone chemical sensor based on ZnO nanoballs, Qu Zhou, Chang Xiang Hong, Yao Yao, Ahmed Mohamed Ibrahim, Lingna Xu, Rajesh Kumar, Sumaia Mohamed Talballa, S. H. Kim, Ahmad Umar, Materials 10, 799 July (2017). Impact Factor: 3.748. https://doi.org/10.3390/ma10070799

66.  Highly-sensitive picric acid chemical sensor based on ZnO nanopeanuts, Ahmed A. Ibrahim, Preeti Tiwari, M.S. Al-Assiri, A. E. Al-Salami,
Ahmad Umar, Rajesh Kumar, S. H. Kim, Z.A. Ansari, S. Baskoutas, Materials 10, 795 July (2017). Impact Factor: 3.748. https://doi.org/10.3390/ma10070795

67.      Synthesis, characterization and acetone gas sensing applications of Ag-doped ZnO nanoneedles, Yas Al-Hadeethi, Ahmad Umar, Ahmed A. Ibrahim, Saleh. H. Al-Heniti, Rajesh Kumar, S. Baskoutas, Bahaaudin M. Raffah, Ceramics International, 43, 6765–6770 June (2017) Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2017.02.088

68.      Zinc oxide nanostructures-based dye-sensitized solar cells, Rajesh Kumar, Ahmad Umar, Girish Kumar, Hari Singh Nalwa, Anil Kumar, M.S. Akhtar, Journal of Materials Science 52 (9), 4743-4795 May (2017). Impact Factor: 4.682. https://doi.org/10.1007/s10853-016-0668-z

69.      Cellulose based grafted biosorbents - Journey from lignocellulose biomass to toxic metal ions sorption applications - A review, Rajesh Kumar, Rajeev Kr. Sharma, Anirudh P. Singh, Journal of Molecular Liquids, 232, 62-93 April (2017). Impact Factor: 6.633. https://doi.org/10.1016/j.molliq.2017.02.050

70.      Antimicrobial properties of ZnO nanomaterials: A review, Rajesh Kumar, Ahmad Umar, Girish Kumar, and Hari Singh Nalwa, Ceramics International, 43 (5) 3940–3961 April (2017) Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2016.12.062

71.      2D Sn-doped ZnO ultrathin nanosheet networks for enhanced acetone gas sensing application, Y. Al-Hadeethi, Ahmad Umar, S.H. Al-Heniti, Rajesh Kumar, S.H. Kim, X. Zhang, Ceramics International, 43 (2) 2418-2423 February (2017). Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2016.11.031

72.      Synthesis and characterization of CuO nanodisks for high-sensitive and selective ethanol gas sensor applications, Ahmad Umar, Jong-Heun Lee, Rajesh Kumar, O. Al-Dossary, Journal of Nanoscience and Nanotechnology 17 (2) February (2017) 1455-1459. Impact Factor: 1.354.

73.      Cauliflower-shaped ZnO nanomaterials for electrochemical sensing and photocatalytic applications, A.A. Ibrahim, Rajesh Kumar, Ahmad Umar, S.H. Kim, A Bumajdad, ZA Ansari, Electrochimica Acta, 222, 463–472 December (2016). Impact Factor: 7.336. https://doi.org/10.1016/j.electacta.2016.10.199

74.      ZnO thin films: Chemical vapour deposition, growth and functional properties, Girish Kumar, Rajesh Kumar, Anil Kumar, Reviews in Advanced Sciences and Engineering, December (2016) 5, 150–160.

75.  Sm2O3-doped ZnO beech fern hierarchical structures for nitroaniline chemical sensor, Ahmed A. Ibrahim, Ahmad Umar, Rajesh Kumar, S.H. Kim, Ali Bumajdad, S. Baskoutas, Ceramics International 42 (15) 16505–16511 November (2016). Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2016.07.061

76.      Fabrication and Characterization of Highly Sensitive and Selective Glucose Biosensor Based on ZnO Decorated Carbon Nanotubes, Ahmed A. Ibrahim, Ahmad Umar, Rafiq Ahmad, Rajesh Kumar, and S. Baskoutas, Nanoscience and Nanotechnology Letters 8, 853–858 October (2016). Impact Factor: 1.128

77.      Synthesis of Sn-doped ZnO nanostructures for 4-nitrophenol chemical sensor application, S.H. Kim, Ahmad Umar, Rajesh Kumar, Nanoscience and Nanotechnology Letters 8, 827–832 October (2016). Impact Factor: 1.128

78.      Bi2O2CO3 nanoplates: Fabrication and characterization of highly sensitive and selective cholesterol biosensor, Ahmad Umar, R. Ahmad, Rajesh Kumar, A.A. Ibrahim, S. Baskoutas, Journal of Alloys and Compounds 683, 433-438 October (2016). Impact Factor: 6.371. https://doi.org/10.1016/j.jallcom.2016.05.063

79.      Quantum information entropy of Eckart potential, Pooja, Rajesh Kumar, G. Kumar, Anil Kumar, International Journal of Quantum Chemistry 116 (19) October (2016) 1413-1418. Impact Factor: 2.437.

80.      Development of highly sensitive and selective ethanol sensor based on lance-shaped CuO nanostructures, Ahmad Umar, Jong-Heun Lee, Rajesh Kumar, O. Al-Dossary, Ahmed A. Ibrahim, S. Baskoutas, Materials & Design 105, 16-24, September (2016). Impact Factor: 9.417. https://doi.org/10.1016/j.matdes.2016.05.006

81.      Microwave-assisted synthesis of ZnO doped CeO2 nanoparticles as potential scaffold for highly sensitive nitroaniline chemical sensor, Naushad Ahmad, Ahmad Umar, Rajesh Kumar, Manawwer Alam, Ceramics International 42 (10), 11562-11567, August (2016). Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2016.04.013

82.      Platinum nanoparticles decorated carbon nanotubes for highly sensitive 2-nitrophenol chemical sensor, Ahmad Umar, Sang-Hoon Kim, Rajesh Kumar, Hamed Algarni, M.S. Al-Assiri, Ceramics International 42 (7), 9257-9263, May (2016). Impact Factor: 5.532. https://doi.org/10.1016/j.ceramint.2016.03.032

83.      Highly sensitive ethanol gas sensors based on Ag-doped ZnO nanocones, Ahmad Umar, Jong-Heun Lee, Rajesh Kumar, Nanoscience and Nanotechnology Letters 8 (3), 241-246, March (2016). Impact Factor: 1.128

84.      Poly (Acrylic Acid)/Multi-Walled carbon nanotube composites: Efficient scaffold for highly sensitive 2-nitrophenol chemical sensor, Sang-Hoon Kim, Ahmad Umar, Rajesh Kumar, Hamed Algarni, Nanoscience and Nanotechnology Letters 8 (3), 200-206, March (2016). Impact Factor: 1.128

85.      Fabrication of nitroaniline chemical sensor based on polyaniline coated multi-walled carbon nanotubes, Sang-Hoon Kim, Ahmad Umar, Rajesh Kumar, Hamed Algarni, MS Al-Assiri, Nanoscience and Nanotechnology Letters 8 (3), 193-199, March (2016). Impact Factor: 1.128

86.      Synthesis and characterization of mimosa pudica leaves shaped α-Iron Oxide nanostructures for ethanol chemical sensor applications, S. H. Kim, Ahmed A. Ibrahim, Rajesh Kumar, Ahmad Umar, M. Abaker, S. W. Hwang, S. Baskoutas, Journal of Nanoscience and Nanotechnology 16 (3), 2944-2949, March (2016). Impact Factor: 1.354.

87.      Effect of annealing temperature on the properties and photocatalytic efficiencies of ZnO nanoparticles, Ahmad Umar, Rajesh Kumar, Girish Kumar, H. Algarni, S.H. Kim, Journal of Alloys and Compounds 648, 46-52, November (2015). Impact Factor: 6.371. https://doi.org/10.1016/j.jallcom.2015.04.236

88.  Facile synthesis and photocatalytic activity of cocoon-shaped CuO nanostructures, S.H. Kim, Ahmad Umar, Rajesh Kumar, Ahmed A. Ibrahim, G. Kumar, Materials Letters, 156, 138-141, October (2015). Impact Factor: 3.574. https://doi.org/10.1016/j.matlet.2015.05.014

89.      Growth and properties of well-crystalline cerium oxide (CeO2) nanoflakes for environmental and sensor applications, Ahmad Umar, Rajesh Kumar, M. S. Akhtar, G. Kumar, S. H. Kim, Journal of Colloid and Interface Science 454, 61–68, September (2015). Impact Factor: 9.965. https://doi.org/10.1016/j.jcis.2015.04.055

90.      Facile and rapid synthesis of ZnO nanoparticles for photovoltaic device application, Sang Hoon Kim, Ahmad Umar, Rajesh Kumar, H. Algarni, and G. Kumar, Journal of Nanoscience and Nanotechnology 15 (9), 6807-6812, September (2015). Impact Factor: 1.354

91.      Ce-doped ZnO nanoparticles for efficient photocatalytic degradation of direct red-23 dye, Rajesh Kumar, A. Umar, G. Kumar, M.S. Akhtar, Y. Wang, S.H. Kim, Ceramics International 41, 7773–7782, July (2015). Impact Factor: 5.532 https://doi.org/10.1016/j.ceramint.2015.02.110

92.      Sonophotocatalytic degradation of methyl orange using ZnO nano-aggregates, Rajesh Kumar, Girish Kumar, Ahmad Umar, M.S. Akhtar, Journal of Alloys and Compounds 629, 167–172, April (2015). Impact Factor: 6.371. https://doi.org/10.1016/j.jallcom.2014.12.232

93.      Zinc oxide nanostructures for NO2 gas sensor applications: A Review, Rajesh Kumar, Girish Kumar, Ahmad Umar, Nano-Micro Letters, Springer 7 (2), 97-120 January (2015). Impact Factor: 23.655. https://doi.org/10.1007/s40820-014-0023-3

94.  ZnO thin films: Depositions, properties and applications-A
review, Rajesh Kumar, Girish Kumar, O. Al-Dossary, and Ahmad Umar
Materials Express 5 (1), 3-23, January (2015). Impact Factor: 1.650.

95.  Doped polyaniline/ZnO nanocomposites: Preparation, characterization and dielectric properties, Samriti Khosla, Suman Lal, Nitin Sood, S.K. Tripathi, Rajesh Kumar, Journal of Information Display 16 (1), 49-55, January (2015). Impact Factor: 2.913.

96.  Zinc oxide nanomaterials for photocatalytic degradation of methyl orange: A review, Rajesh Kumar, Girish Kumar, and Ahmad Umar, Nanoscience and Nanotechnology Letters 6 (8) 631–650, August (2014). Impact Factor: 1.128

97.  Photocatalytic degradation of direct red-23 dye with ZnO nanoparticles, Girish Kumar, Rajesh Kumar, Sang Woon Hwang, and Ahmad Umar, Journal of Nanoscience and Nanotechnology. 14, 7161-7166, September (2014). Impact Factor: 1.354

98.      Pulse laser deposited nanostructured ZnO thin films: A review, Rajesh Kumar, Girish Kumar, and Ahmad Umar, Journal of Nanoscience and Nanotechnology 14, 1911-1930, February (2014). Impact Factor: 1.354

99.      Frequency dependence electrical conductivity of PANI and PANI/MWCNTs composites, Suman Lal, S. K. Tripathi, Rajesh Kumar, Samriti Khosla, International Journal of Engineering Research and Technology (IJERT) AMRP-2013 Conference Proceedings, 105-107 (2013).

100.   ZnO nano-mushrooms for photocatalytic degradation of methyl orange, Rajesh Kumar, Girish Kumar, Ahmad Umar, Material Letters, 97, 100-103, April (2013). Impact Factor: 3.574. https://doi.org/10.1016/j.matlet.2013.01.044

101.   Photodegradation of congo red dye with ZnO nanohexagons, Girish Kumar, Phulan Rani, Anil Kumar, Suman Lal, Rajesh Kumar, Arni University International Journal Vol. 2, issue 2 (2013) ISSN: 2278 – 4241.

102.   A study on solution behaviour of sodiumdodecyl sulphate on cetyltrimethylammonium bromide in water - alcohol mixed media. Girish Kumar, M S Chauhan, Akshat Kumar, Suvercha Chauhan and Rajesh Kumar, Der Chemica Sinica, 3(3), 628-635, March (2012).