Dr. Rajesh Kumar
@iit kanpur
Ramanujan Fellow
Indian Institute of Technology (IIT), Kanpur
Dr. Rajesh Kumar has been awarded prestigious international fellowships as JSPS (Japan Society for the Promotion of Science: Standard) (2018), JAPAN; FAPESP (Sao Paulo Research Foundation) (2017), BRAZIL and Brain Korea-21 (BK-21+) (2014), SOUTH KOREA. He has worked in Toyohashi University of Technology (TUT), Toyohashi, JAPAN as JSPS Fellow (2018-2020). He has also worked in BRAZIL (University of Campinas (UNICAMP) (2015–2017; CNPq postdoctoral fellow/ visiting scientist), Campinas & State University of Sao Paulo (UNESP) (2018; FAPESP postdoctoral fellow), Presidente Prudente) and SOUTH KOREA (Korea Advanced Institute of Science and Technology (KAIST) (2012–2014; postdoctoral researcher), Daejeon &, Yonsei University (2014; Brain Korea: BK 21+ Research Professor), Seoul at different scientific positions.
EDUCATION
PhD in Physics
RESEARCH, TEACHING, or OTHER INTERESTS
Condensed Matter Physics, Energy, Materials Science, Fuel Technology
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Rajesh Kumar, Sumanta Sahoo, Raghvendra Pandey, Ednan Joanni, and Ram Manohar Yadav
Elsevier BV
Rajesh Kumar, Raghvendra Pandey, Ednan Joanni, and Raluca Savu
Elsevier BV
Sumanta Sahoo, Ahamed Milton, Ankur Sood, Rajesh Kumar, Soonmo Choi, Chandan Kumar Maity, and Sung Soo Han
Elsevier BV
Sumanta Sahoo, Rajesh Kumar, Iftikhar Hussain, Rajiv Kumar Verma, Thanayut Kaewmaraya, Tanveer Hussian, and Sung Soo Han
Elsevier BV
May Zin Toe, Rajesh Kumar, Wai Kian Tan, Atsunori Matsuda, and Swee-Yong Pung
Elsevier BV
Shiwani Kalia, Rajesh Kumar, Rajnish Dhiman, and Rajesh Kumar Singh
Elsevier BV
Rajesh Kumar, Ednan Joanni, Wai Kian Tan, and Atsunori Matsuda
Elsevier BV
Reda E. El-Shater, Mohamed M. Abdel-Galeil, Ali H. Gemeay, Eman Sh. Salama, Rajesh Kumar, and Ahmed H. Mangood
Springer Science and Business Media LLC
Saloni Sharma, Rajesh Kumar, and Ram Manohar Yadav
Wiley
AbstractIn this work, poly(vinylidene fluoride‐hexafluoropropylene) (PVDF‐HFP)/mesoporous graphitic carbon nitride (mpg‐C3N4) composite fiber web have been prepared and characterized for photocatalytic methylene blue (MB) degradation and sensing applications. The electrospinning technique, operating at a flow rate of 1 mL/h and a voltage of 15 kV, was utilized to prepare the composite membranes of PVDF‐HFP with the uniform distribution of the mpg‐C3N4. The composite web demonstrated outstanding photocatalytic activity for the degradation of MB, reaching a quick 68% drop in MB concentration in just 45 min. The composite web furthermore worked as a sensor for MB detection. After MB exposure, the film resistance was increased, suggesting its potential as a chemiresistive sensor. The maximum resistivity of PVDF‐HFP/mpg‐C3N4 composites was found to be 90 Ω·m at 2% concentration of MB. The MB molecules' adsorption on the surface of the composite web and the existence of photocatalytic byproducts on the surface may be responsible for this shift in resistance. This dual functionality highlights the adaptability and potential of the PVDF‐HFP/mpg‐C3N4 composite web as a versatile material for environmental sensing and cleanup. This research presents a comprehensive approach to the synthesis, characterization, and evaluation of such flexible membranes for potential applications as self‐cleaning devices and chemiresistive sensor.Highlights PVDF‐HFP/mpg‐C3N4 composite membranes act as an efficient material for MB degradation (68%) with visible light exposure. mpg‐C3N4 plays the role of active material in degradation. PVDF‐HFP/mpg‐C3N4 composite membrane also act as sensors for MB detection. Composite membrane becomes chemiresistive due to notable resistivity changes with MB concentration.
Saloni Sharma, Rajesh Kumar, and Ram Manohar Yadav
Royal Society of Chemistry (RSC)
As an effective and ultrasensitive molecule detection technique, surface-enhanced Raman spectroscopy (SERS) needs efficient and highly responsive substrates to further enhance its sensitivity and utility.
Shiwani Kalia, Rajesh Kumar, Ritika Sharma, Sachin Kumar, Dilbag Singh, and Rajesh K. Singh
Elsevier BV
Nitika Devi, Rajesh Kumar, Shipra Singh, and Rajesh Kumar Singh
Informa UK Limited
Abstract The unique two-dimensional structure of graphene containing large surface area, high conductivity, and good physicochemical stability brought a new era in science and technology for scientists and researchers. The intent of this review is to focus on advanced applications of graphene and its related composites in a variety of fields. Starting with a brief introduction of graphene, the review summarizes the major concerns associated with different synthesis methods. Numerous top-down and bottom-up approaches have been developed for reasonable graphene synthesis. Effects of the number of layers on the performance of graphene were also identified as another key area of research. Different techniques for characterization are used to determine the number of layers, thickness and quality of graphene. Graphene properties such as high electrical and thermal conductivity, high optical, excellent mechanical strength, etc., have been summarized. Also, description of features and factors affecting the properties are described in detail. Graphene-based materials have been extensively investigated and discussed especially for energy, environmental and biomedical applications. Graphene and its derivatives are extensively gaining interest as electrode materials for energy storage/conversions. Current developments of energy storage/conversion applications, focusing on supercapacitors, batteries and solar cells, are studied in detail.
Sumanta Sahoo, Rajesh Kumar, Ganesh Dhakal, and Jae-Jin Shim
Elsevier BV
Saloni Sharma, Mohsin Hasan, Koteswararao V. Rajulapati, Rajesh Kumar, Pulickel M. Ajayan, and Ram Manohar Yadav
Springer Science and Business Media LLC
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, Rajesh Kumar Singh, and Ram Manohar Yadav
Elsevier BV
Rajesh Kumar, Dinesh Pratap Singh, Romina Muñoz, Mongi Amami, Rajesh Kumar Singh, Shipra Singh, and Vinod Kumar
Elsevier BV
Sally M. Youssry, M. Abd Elkodous, Rajesh Kumar, Go Kawamura, Wai Kian Tan, and Atsunori Matsuda
Elsevier BV
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, Raghvendra Pandey, Wai Kian Tan, Go Kawamura, Stanislav A. Moshkalev, and Atsunori Matsuda
Elsevier BV
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, and Jae-Jin Shim
Elsevier BV
Saloni Sharma, Rajesh Kumar, and Ram Manohar Yadav
Elsevier BV
Han Min Soe, Rajesh Kumar, Atsunori Matsuda, and M. Mariatti
Elsevier BV
M. Abd Elkodous, Samuel Oluwaseun Olojede, Sumanta Sahoo, and Rajesh Kumar
Elsevier BV
Rajesh Kumar, Sumanta Sahoo, and Ednan Joanni
Elsevier BV
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, Raghvendra Pandey, and Jae-Jin Shim
Royal Society of Chemistry (RSC)
Vacancies are ubiquitous in nature, usually playing an important role in determining how a material behaves, both physically and chemically.
Reda E. El Shater, Hanaa S. El-Desoky, Talaat M. Meaz, Rajesh Kumar, and Mohamed M. Abdel-Galeil
Springer Science and Business Media LLC
AbstractAg mixed Cd–Cu nanoferrite (Cd0.5Cu0.25Ag0.25Fe2O4; Ag-CCF) has been successfully prepared by co-precipitation method. The grain size of Ag mixed Cd–Cu ferrite was 10 nm estimated by HRTEM; while the specific surface area was measured by BET was 161 m2/g. The XRD measurement shows a good crystallization ferrite phase and FT-IR spectrum represents two characterized bands of spinel ferrite 428 cm−1 and 596 cm−1. The three broad peaks of Raman spectrum 276 cm−1, 386 cm−1 and 643 cm−1 are characterized of spinel phase. The VSM measurement has represented superparamagnetism with saturation magnetization 30 emu/g, remnant magnetization 1 emu/g and coercive field 38G. The Ag-CCF/rGO (reduced grapheme oxide) composite used for electrode in supercapacitor deliver specific capacitance of 306 F/g at scan rate 5 mV/s. Nyquist plot represented that charge transfer resistance of the Cd–CuFe2O4/rGO composites (82.3 Ω) was much smaller than that of the pristine Cd-CuFe2O4 (591 Ω). This can be ascribed to the introduction of conductive graphene improved the electrical conductivity of the composites, leading to the better rate capability and higher specific capacitance in comparison with the pristine Cd–CuFe2O4.