Dr. Jelmy E.J.
Dr. Jelmy E.J. joined the Department of Polymer Science and Rubber Technology in June 2018 as a Post Doctoral Fellow (PDF) under the mentorship of Dr. Honey. She has received M.Sc. in Applied Chemistry from University of Calicut in the year 2008, and then moved Coimbatore, Tamil Nadu, to pursue doctoral studies in the Department of Chemical Engineering and Materials Science, Amrita University Coimbatore, where she worked under Dr. Nikhil. K. Kothurkar for the development of ‘polyaniline-carbon nanotube nanocomposites’ for Electromagnetic Interference Shielding and Dye Sensitized Solar Cell applications. Being with the Nanomaterials group of Dr. Honey, she is currently working on the development of graphene/conducting nanocomposites for the environmental as well as energy related applications; and on the development of graphene/ conducting polymer incorporated PVA aerogel for pollutant adsorbents from aqueous solutions.
E. J. Jelmy, Nishanth Thomas, Dhanu Treasa Mathew, Jesna Louis, Nisha T. Padmanabhan, Vignesh Kumaravel, Honey John, and Suresh C. Pillai, Impact of structure, doping and defect-engineering in 2D materials on CO2 capture and conversion React. Chem. Eng., 2021, View the Article
Stanly S., Jelmy E.J., Nair, C.P.R., John, H., Carbon dioxide adsorption studies on modified montmorillionite clay/reduced graphene oxide hybrids at low pressure. J. Environ. Chem. Engg. 7 (2019) 103344.
A facile and ecofriendly method for the synthesis of PDMS composites for triboelectric nanogeneration (TENG) applications is developed which can harvest electrical energy from mechanical energy as desired.
The effect of modification of Montmorillonite clay (MMT) and the development of its hybrid with reduced graphene oxide was studied for CO2 adsorption at low pressure. Novel polyphosphoric acid modified montmorillonite (PMMT) clay was synthesized by cation exchange reaction to improve the surface area and thereby improving the carbon dioxide adsorption capacity. The MMT clay, polyphosphoric acid modified clay (PMMT), and amino modified clay (AMMT) were hybridized with reduced graphene oxide (rGO) by in-situ hydrothermal reduction of graphite oxide for CO2 adsorption studies. The hybrids were characterized using X-ray diffraction (XRD) analysis, Fourier Transform Infrared (FTIR) analysis, Field Emission Scanning Electron Microscopic (FESEM) and Transmission Electron Microscopic (TEM) analyses. The Brunauer–Emmett–Teller (BET) surface area analysis confirmed a surface area of 50.7709 m2/g for PMMT/rGO hybrid, which was higher than that of MMT/rGO and AMMT/rGO hybrids. In general, all hybrids were active in CO2 adsorption at comparatively low pressure [ranging from 0 to 900 mmHg]. PMMT/rGO hybrid showed highest CO2 adsorption of 0.49 mmol/g and this was 42% more in CO2 adsorption when compared to other materials studied in this paper. The low pressure CO2 adsorption values obtained for PMMT/rGO hybrid was substantially good when compared to the literature results and this shows the importance of clay based materials for the development of efficient adsorbent for CO2.
The investigations on anthropogenic carbon dioxide (CO2) capture and conversion play a vital role in eradicating global warming and the energy crisis. In this context, defect-engineered two-dimensional (2D) nanomaterials have received much attention in recent years. Herein, the significance of 2D nanomaterials such as graphene, transition metal dichalcogenides, hexagonal boron nitride, MXenes, graphitic carbon nitride, metal/covalent organic frameworks, nanoclays, borophenes, graphynes and green phosphorenes for CO2 capture and conversion has been emphasized. Further, the intrinsic mechanism of CO2 adsorption and conversion is discussed in detail. Theoretical and experimental studies among 2D materials highlight that N-doped porous adsorbents based on graphene and MXenes are more suitable for CO2 adsorption applications. Also, more emphasis is given to outlining and discussing the role of various 2D nanomaterials and their hybrids as photocatalysts, electrocatalysts, photoelectrocatalysts, and thermocatalysts to transform CO2 into valuable products. Although immense efforts are deployed in developing 2D catalysts for the conversion of CO2, challenges such as agglomeration, poor yield, difficulties in analysing the 2D structures for catalytic factors, poor knowledge and in-depth understanding of the reaction mechanisms, high cost, etc. limit their large scale production and commercialization. More detailed theoretical and experimental investigations are required to develop 2D nanostructures with optimum properties for large-scale capture and conversion of CO2.