Rashi Gusain
Verified @gmail.com
Postdoctoral fellow, Department of Chemical Sciences
University of Johannesburg
RESEARCH INTERESTS
ionic liquids, 2D nanomaterials, carbon based nanomaterials, wastewater treatment, photocatalysis, CO2 capture and conversion, tribology, electrocatalysis, photocatalysis
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Rashi Gusain, Neeraj Kumar, Shayan Seyedin, and Yunhong Jiang
Wiley
AbstractThe ever‐increasing demand for sustainable energy sources and environment protection is the focus of significant scientific scrutiny worldwide. Advanced composite materials have been developed to help meet the energy demand and environmental sustainability. Researchers are drawn to the study of two‐dimensional (2D) materials/bacterial cellulose (BC) composites for energy and environmental applications due to the intriguing electrical, mechanical, electrochemical, and catalytic properties of 2D materials combined with the sustainability and biocompatibility of BC. In this review, the key strategies are explained to develop 2D materials/BC composites and highlight unique properties of such fascinating systems. The recent progress on the application of advanced 2D materials/BC composites in energy storage (supercapacitors and batteries) and environmental remediation (water treatment, antimicrobial activity, and environmental gas sensing) are explained in detail highlighting future outlooks and challenges in the field. This review is intended to serve as a valuable resource for researchers currently engaged in the study of 2D materials and/or BC for different applications and is expected to shape the upcoming research and industrial applications of emerging 2D materials/BC composites.
Neeraj Kumar, Rashi Gusain, Mike Masukume, and Suprakas Sinha Ray
Wiley
The occurrence of pharmaceutical pollutants in the environment is a mounting concern due to their detrimental effects on living organisms, including humans. Ciprofloxacin (CIP) is a regularly used antibiotic detected in wastewater and surface water. Therefore, developing effective, sustainable strategies for its elimination is paramount. Photocatalysis is an efficient approach that has been widely recommended for the removal of CIP from water. However, improved photocatalyst performance, stability, and activation in abundant visible light are essential for better photocatalyst systems. In this study, a novel boron‐oxide‐decorated nitrogen‐rich reduced graphene oxide (B2O3/N‐rGO) nanocomposite is prepared and characterized for its photocatalytic performance toward CIP degradation. The B2O3/N‐rGO nanocomposites are in situ synthesized via wet chemical route, and the morphology and structural properties of nanocomposites are extensively characterized. In the results, it is shown that the B2O3/N‐rGO nanocomposite demonstrated significantly enhanced photocatalytic performance (98%, 3 h) compared to N‐rGO and pure B2O3 toward the degradation of CIP under visible‐light irradiation. The enhanced photocatalytic activity is attributed to the synergistic benefit of B2O3 and N‐rGO, which improves light absorption, charge separation efficiency, adsorption sites, and delayed electron–hole recombination. In summary, the synthesized B2O3/N‐rGO nanocomposite photocatalyst can potentially be applied for various environmental remediation and energy‐related applications.
Rashi Gusain, Neeraj Kumar, and Suprakas Sinha Ray
Wiley
Neeraj Kumar, Rashi Gusain, Sadanand Pandey, and Suprakas Sinha Ray
Wiley
Jean Bedel Batchamen Mougnol, Shelter Maswanganyi, Rashi Gusain, Neeraj Kumar, Elvis Fosso‐Kankeu, Suprakas Sinha Ray, and Frans Waanders
Wiley
Neeraj Kumar, Rashi Gusain, and Suprakas Sinha Ray
Springer International Publishing
Rashi Gusain, Neeraj Kumar, and Suprakas Sinha Ray
Springer International Publishing
Rashi Gusain, Neeraj Kumar, and Suprakas Sinha Ray
CRC Press
Kanika Gupta, Pratiksha Joshi, Rashi Gusain, and Om P. Khatri
Elsevier BV
Shelter Maswanganyi, Rashi Gusain, Neeraj Kumar, Elvis Fosso-Kankeu, Frans Boudewijn Waanders, and Suprakas Sinha Ray
American Chemical Society (ACS)
Polycyclic aromatic hydrocarbons are a class of persistent organic water pollutants that raise serious concerns owing to their carcinogenicity and other negative impacts on humans and ecosystems. In this study, Bi2MoO6/reduced graphene oxide (rGO) nanocomposites were designed and prepared for the adsorption-assisted photodegradation of naphthalene molecules in an aqueous medium. The synthesized Bi2MoO6 nanoplates and Bi2MoO6/rGO nanocomposites were characterized by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, high-resolution transmission microscopy, X-ray photoelectron spectroscopy, ultraviolet spectroscopy, Brunauer–Emmett–Teller, and photoluminescence measurements. The photodegradation of naphthalene molecules was observed to assess the photocatalytic characteristics of the samples under visible light. The Bi2MoO6/rGO nanocomposites exhibited significantly improved photocatalytic efficiency compared to pure Bi2MoO6. Among the nanocomposites, those containing 2 wt % rGO showed the best photocatalytic activity. The incorporation of rGO enhanced the visible light absorption and decreased the recombination rate of photogenerated charge carriers. Moreover, a Bi2MoO6/rGO nanocomposite showed excellent reusability for five cycles.
Rashi Gusain, Neeraj Kumar, Francis Opoku, Penny Poomani Govender, and Suprakas Sinha Ray
American Chemical Society (ACS)
Wastewater management and treatment are crucial to preserve health and life on the planet. To achieve efficient wastewater treatment, MoS2 nanosheet/ZnS-based composites were prepared and tested fo...
Pratiksha Joshi, Kanika Gupta, Rashi Gusain, and Om P Khatri
Wiley
Sangita Kumari, Rashi Gusain, Anurag Kumar, Nilesh Manwar, Suman L Jain, and Om P Khatri
Elsevier BV
Amzad Khan, Sathyam Reddy Yasa, Rashi Gusain, and Om P. Khatri
Elsevier BV
Neeraj Kumar, Santosh Kumar, Rashi Gusain, Ncholu Manyala, Salvador Eslava, and Suprakas Sinha Ray
American Chemical Society (ACS)
Copyright: 2020, American Chemical Society. Due to copyright restrictions, the attached PDF file contains the abstract of the full-text item. For access to the full-text item, please consult the publisher's website.
Rashi Gusain, Amzad Khan, and Om P. Khatri
Elsevier BV
Rashi Gusain, Neeraj Kumar, and Suprakas Sinha Ray
Elsevier BV
Nthambeleni Mukwevho, Rashi Gusain, Elvis Fosso-Kankeu, Neeraj Kumar, Frans Waanders, and Suprakas Sinha Ray
Elsevier BV
Rashi Gusain, Neeraj Kumar, and Suprakas Sinha Ray
Wiley
Amzad Khan, Rashi Gusain, Manisha Sahai, and Om P. Khatri
Elsevier BV
Rashi Gusain, Kanika Gupta, Pratiksha Joshi, and Om P. Khatri
Elsevier BV
Rashi Gusain, Neeraj Kumar, Elvis Fosso-Kankeu, and Suprakas Sinha Ray
American Chemical Society (ACS)
In this study, we investigate the adsorption capability of molybdenum sulfide (MoS2)/thiol-functionalized multiwalled carbon nanotube (SH-MWCNT) nanocomposite for rapid and efficient removal of heavy metals [Pb(II) and Cd(II)] from industrial mine water. The MoS2/SH-MWCNT nanocomposite was synthesized by acid treatment and sulfurization of MWCNTs followed by a facile hydrothermal reaction technique using sodium molybdate and diethyldithiocarbamate as MoS2 precursors. Morphological and chemical features of the nanocomposite material were studied using various characterization techniques. Furthermore, the effects of adsorbent (MoS2/SH-MWCNT nanocomposite) concentration, contact time, initial concentration of heavy-metal ions, and reaction temperature were examined to determine the efficiency of the adsorption process in batch adsorption experiments. Kinetics and isotherm studies showed that the adsorption process followed pseudo-second-order and Freundlich adsorption isotherm models, respectively. Thermodynamic parameters calculated using van’t Hoff plots show the spontaneity and endothermic nature of adsorption. MoS2/SH-MWCNT nanocomposite demonstrates a high adsorption capacity for Pb(II) (90.0 mg g–1) and Cd(II) (66.6 mg g–1) following ion-exchange and electrostatic interactions. Metal–sulfur complex formation was identified as the key contributor for adsorption of heavy-metal ions followed by electrostatic interactions for multilayer adsorption. Transformation of adsorbent into PbMoO4–xSx and CdMoO4–xSx complex because of the adsorption process was confirmed by X-ray diffraction and scanning electron microscopy-energy-dispersive spectrometry. The spent adsorbent can further be used for photocatalytic and electrochemical applications; therefore, the generated secondary byproducts can also be employed for other purposes.
Amzad Khan, Rashi Gusain, and Om P. Khatri
Elsevier BV