Dr. Percy J.Sephra

Teaching

Educational Background

Work Experience

Research

Area of Research Interest

• 2D materials
• Electrochemical Supercapacitors
• Sensors
• Metal oxide nanostructures

Publications in Journals

International Journal

• Electrochemical detection of phosphate ions using CoMoO₄and ammonium molybdate tetrahydrate-modified electrodes, Sephra, P.J., Chandrapragasam, T., Sachdev, A. et al. ,J Mater Sci 60, 11350–11368 (2025). https://doi.org/10.1007/s10853-025-11150-8  IF:3.9
• Bifunctional properties of Ag/α-Fe₂O₃/rGO nanocomposite for supercapacitor and electrochemical nitrate sensing using tetradodecyl ammonium nitrate as ion-selective membrane. Sephra, P.J., Chandrapagasam, T., Sachdev, A. et al.Environ Sci Pollut Res https://doi.org/10.1007/s11356-024-34703-x
• Enhanced non-enzymatic multicomponent detection via one-step hydrothermal synthesis of widely dispersed Zn-SnO₂ nanoparticles on nitrogen-doped reduced graphene oxide. P.Baraneedharan, Percy J.Sephra, Res. Innov.,2024,1–9.
• An efficient sensing system using ion-selective membrane on Ni₂O₃/rGO nanocomposite for electrochemical detection of nitrate ions, Percy Sephra, Tharini C., Abhay Sachdev, Manikandan E., J. Alloys Compds.,2024,980, 173414     IF: 6.37
• Nanoengineering of MXene-Based Field-Effect Transistor Gas Sensors: Advancements in Next-Generation Electronic Devices, P Baraneedharan, D Shankari, A Arulraj, Percy J Sephra, RV Mangalaraja, Mohammad Khalid, Electrochem. Soc., 2023, 170, 107501 IF: 3.9
• Potentiometric sensing of potassium ion (K+) using valinomycin supported on ZnO/rGO nanocomposites, C Tharini, G Iyappan, E Manikandan, Percy J Sephra, Mater. Sci. Mater. Electron.,2023,34,19,1474    IF: 2.8
• Fe2O3/graphene nanocomposites as heterogeneous Fenton catalysts: Correlation studies on catalyst dosage, graphene loading and adsorption kinetics on methylene blue degradation, Gaber E Eldesoky, P Baraneedharan, BM Reddy, Adel EM Yahya, M Alfakeer, T Daniel Thangadurai, K Nehru, Percy J Sephra, MRS Communications, 2021, vol. 11, 943-949    IF:1.9
• Ionic liquid functionalized manganese oxide on solar exfoliated graphene as supercapacitor electrode, Percy Sephra, Pari Baraneedharan, Muthusamy Sivakumar, Thangaian Daniel Thangadurai, Kasi Nehru, Nano-Structures & Nano- Objects, 2019,vol.19,100360.   IF:1.232
• CuO/SiO2 modified amine functionalized reduced graphene oxide with enhanced photocatalytic and electrochemical properties. Percy J. Sephra, Pari Baraneedharan, Muthusamy Sivakumar, Thangaian Daniel Thangadurai, Kasi Nehru, SN Applied Sciences, 2019, 1, 73. IF:2.6
• Electrochemical determination of ATP at rhodamine6G capped gold nanoparticles modified carbon felt electrode at pH 2, N. Manjubaashini, Percy J. Sephra, K. Nehru, M. Sivakumar, T. Daniel Thangadurai, Sensor Actuat. B-Chem., 2019, vol. 281, pp. 1054-1062. IF: 8.4
• Size controlled synthesis of SnO2 and its electrostatic self- assembly over reduced graphene oxide for Photocatalyst and Supercapacitor application, Percy Sephra, Pari Baraneedharan, Muthusamy Sivakumar, Thangaian Daniel Thangadurai, Kasi Nehru, Mater. Res. Bull., 2018, vol. 106, pp. 103 -112. IF: 5.6
• In situ growth of hexagonal-shaped α-Fe2O3 nanostructures over few layered graphene by hydrothermal method and their electrochemical performance, Percy Sephra, Pari Baraneedharan, Muthusamy Sivakumar, Thangaian Daniel Thangadurai, Kasi Nehru, J. Mater. Sci. Mater. Electron., 2018, vol. 29, NO. 9, pp. 6898-6908. IF: 2.8
• Microwave assisted synthesis of Sn(1−x)CoxO2 nanoparticles: effect of impurity phase formation on structural, optical and electrochemical properties, Percy J. Sephra, Pari Baraneedharan, Chidambaram Siva, Muthusamy Sivakumar, Kasi Nehru, Mater. Sci. Mater. Electron., 2016, pp 1-9. IF: 2.8

Book Chapters

• Nanoelectronics Devices (Field-Effect Transistors, Electrochromic Devices, Light- Emitting Diodes, Dielectrics, Neurotransmitters) PJ Sephra, P Baraneedharan, A Arulraj, Advances in Hybrid Conducting Polymer Technology, Chapter 4, 2021,77 – 100.
• Transition metal oxides/sulfides electrode based supercapacitors, PJ Sephra, P Baraneedharan, C Tharini, Supercapacitors: Materials, Design, And Commercialization, Chapter 5 – 2024, 3-123.

Papers Presented In International / National Conferences

• Percy J. Sephra, C.Tharini (2024), Investigation of electrochemical properties of Ag-encapsulated Fe₂O₃ on rGO support for Supercapacitor applications, International Conference on Frontiers in Electrochemistry: Innovations in Supercapacitors and Batteries on 20^th & 21^st September 2024 held at B S Abdur Rahman Crescent Institute of Science and Technology, Chennai, India.
• Percy J. Sephra, C.Tharini (2024), Highly sensitive pH-dependent electrochemical detection of phosphate ions using CoMoO₄ and Ammonium molybdate-modified electrodes, International Conference on “Smart Materials for Green Energy and Environmental Sustainability” (SMaGEES-2024) on 11^th & 12^th December 2024 held at B S Abdur Rahman Crescent Institute of Science and Technology, Chennai, India.
• Percy J. Sephra, C.Tharini (2024), Enhanced Electrochemical Nitrate Sensing Using Tetradodecyl Ammonium Nitrate as Ion-Selective Membrane on Ag/ α-Fe2O3/rGO Nanocomposite, International Conference on Integration and Transformation with SDGs (ICITS2024) on the 15th & 16th April 2024 held at Hindustan Institute of Technology and Science, Chennai, India
• C.Tharini, Percy J. Sephra (2023), Solid state ion-selective electrode using Ni₂O₃/rGO nanocomposite for electrochemical detection of nitrate ions, International Conference on Functional Materials and its Application Aspects (ICFMAA-2023) 7 th – 8 th September 2023 held at Saveetha School of Engineering SIMATS Chennai, India
• C.Tharini, Percy J.Sephra, T.Vedhasree, P.Bhargavi, T.Chandu (2023), Electrochemical detection of nitrate ions using a novel NiO/Ni₂O₃ /rGo nanocomposites solid-state ion-selective electrode, 11th International Conference On “Contemporary Engineering And Technology – 2023” (ICCET – 2023) May 1st – 2nd, , Organized By Organization Of Science And Innovative Engineering & Technology (OSIET). Chennai, India.
• Percy Sephra, Pari Baraneedharan, Muthusamy Sivakumar,  Thangaiyan Daniel Thangadurai, Kasi Nehru (2017), Hydrothermal synthesis of hexagonal α-Fe2O3/graphene nanocomposites for Supercapacitor application, International Conference on MATERIALS AND TECHNOLOGY- Synthesis, Processing and Applications (ICMAT- SPA), 09 March held at Sri S. Ramasamy Naidu Memorial College, Sattur, India
• Percy Sephra, M. Sivakumar, T. Daniel Thangadurai, K. Nehru(2016), In-situ Hydrothermal growth of α- Fe2O3 / Graphene nanocomposites for Supercapacitor, National Convention of Electrochemists (NCE 19) March 28 & 29, held at NIT- Tiruchirappalli, India.
• Percy Sephra, Pari Baraneedharan, Chidambaram Siva, Muthusamy Sivakumar, Kasi Nehru (2014),Microwave-assisted synthesis and characterization of Sn(1-x)CoxO2 nanostructures, 7^th Bangalore INDIA NANO Poster – ‘Walkway of Discovery’, December 4-6, Bangalore, INDIA.
• Percy J. Sephra, P. Baraneedharan, M. Sivakumar, K. Nehru (2013),: Structural, Optical and Electrochemical studies on SnO2 and Sn1-xCoxO2 nanoparticles by microwave-assisted synthesis route, Second International Workshop on Advanced Functional Nanomaterials (SIWAN), 28 -30 January held at Anna University, Chennai, India.

Academic Achievements

• Organized Webinar on “Curious on Nanoelectronics-Thinking Big, Working Small: A Bench Talk” given by Arulraj, ANID-FONDECYT Postdoctoral Fellow, DIMAT- UdeC, Advanced Ceramics and Nanotechnology Lab, Department of Materials Engineering, University of Concepcion, Chile Concepcion June 14, 2021

FDP / Workshop / Conference / Handson Attended

• Attended 6 days FDP on “Advanced Materials for Sustainable Energies” conducted by PDPM IIITDM, Jabalpur from May 26 – 31, 2025
• Partcipated in National Workshop on Fabrication of Batteries and Supercapacitors 2024 at S.Abdur Rahman Crescent Institute of Science and Technology on December 3 & 4, 2024,
• Attended 4 days “7th Hands-on Training on Fabrication of Microfluidic Channel” under INUP-i2i, IIT Delhifrom 9th to 12th May, 2024.
• Attended 8  Days  FDP  on  “Nanomaterials:  Experimental  Design  &  Theoretical Modelling” conducted by IIITDM, Kurnool, 13^th to 20^th Feb, 2021
• Attended 5 days FDP on “Curriculum Development” conducted by BIHER, Chennai, 20^th-27^th Jan,2021
• Attended 6 days conference on “World Nano Congress on Advanced Science and Technology”, conducted by VIT Chennai, 8^th to 13^th March,2021
• Attended 5 days FDP (ATAL &AICTE sponsored) on “Role of materials in Electric Vehicles”, conducted by PDA College of Engineering, 7^th June to 11^th June,
• Attended 2 days workshop on “International workshop on 3D printing” conducted by University of Madras, 9^th and 10^th April, 2021

Awards On Conference Presentation

• Best Paper award in International Conference on Integration and Transformation with SDGs (ICITS2024) on the 15th & 16th April 2024 held at Hindustan Institute of Technology and Science, Chennai, India
• Best Oral presentation award on International Conference on MATERIALS AND TECHNOLOGY- Synthesis, Processing and Applications (ICMAT- SPA), 09 March 2017 held at Sri S. Ramasamy Naidu Memorial College, Sattur, India