13. Invited Talk as Expert Speaker on entitled “Graphene and its Derivatives: Preparation and Emerging Applications in Flexible Energy and Electronics Devices” in six-day workshop on "The Future of Nanotechnology in VLSI", National Institute of Technology (NIT), New Delhi, India (Nov. 18-23, 2024)

12. Invited Lecture on entitled “Two-dimensional Layered Graphene Materials and its Multifunctional Applications” Department of Physics, PPN PG College, Kanpur (Nov. 16, 2024)

11. Invited Talk on entitled "Porous Graphene-Based Materials containing 3D Engineered Defect Morphology for Electrochemical Energy Storage" in International Conference on Advancement in Functional Materials (ICAFM-2024), Veer Bahadur Singh Purvanchal University, Jaunpur, India (Feb. 08–10, 2024)

10. Invited Talk on entitled "Graphene and its Derivative-based Materials: Synthesis, Properties and Applications to Energy Storage/ Conversion" in Meghnad Saha Memorial International Conference on “Frontiers of Physics” (MSMICFP-2023), Allahabad University, Prayagraj, India (Nov. 22-24, 2023)

9. Oral Presentation on entitled “Microwave-assisted Defect Engineering in Graphene-based Nanohybrid Materials for Emergent Energy Applications” in International Conference on Materials for Energy & Sustainable Development (MESD 2023), JNU, New Delhi, India (Oct. 27-29, 2023)

8. Invited Talk on entitled “2D Layered Graphene and its Doped Structure from Various Methods in Novel Energy Storage Applications” in First International Virtual Conference on Recent Trends in Nanomaterials Synthesis and Applications (RTNSA 2020), Madanapalle Institute of Technology and Science, Madanapalle, Andhra Pradesh, India (July 16-18, 2020)

7. Invited “Science Dialogue Lecture” (Organized and arranged by JSPS official) in Kawagoe High School, Mei Prefecture, Japan (Jan 21, 2020).

6. Invited Lecture on entitled “Graphene Derivatives Modification as Defect-Engineered Mesoporous Electrode Materials in Energy Storage/Conversion Devices” in 10th ISAJ Symposium on Interdisciplinary Science and Technology Innovation for Sustainable Society, organized by Indian Scientist Association in Japan (ISAJ), Osaka University, Osaka, Japan (Dec 09, 2019)

5. Invited Guest Lecture on entitled “Roles of 2D Carbon Materials (Graphene and its derivatives) in Novel Energy Storage Applications” held in Amity School of Applied Sciences, Amity University, Lucknow Campus, Lucknow, India (Jan 24, 2019).

4. Invited “Science Dialogue Lecture” (Organized and arranged by JSPS official) in Tokai University Shizuoka, Japan (Dec. 15, 2018).

3. Invited Talk in the International Conference on Nanoscience and Nanotechnology (ICNN) - Sept 21-23, 2017; Organized by BBA Central University - Lucknow, India (Achieved: Young Researcher Award) (Sept. 21, 2017)

2. Invited Lecture on “Present Scenario of Nanomaterial Science and Future Prospects” held in Sam Higginbottom University of Agriculture, Technology and Sciences (SHUATS), Naini Allahabad, India (Mar. 06, 2017)

1. Invited Talk in the “National Seminar on Nano Science and Nano Biotechnology” (Feb 25-26, 2017) held in DAV College, Kanpur on the topic “Surface Modifications of Graphene Oxide and its Energy Storage Applications” (Feb. 25, 2017)