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274 results on '"Verma, Ritesh"'

14. Bioprinting for Therapeutics

Author

Verma, Ritesh, Dhanda, Neetu, Rathore, Raksha, Suhag, Deepa, Wan, Fayu, Thakur, Atul, Thakur, Preeti, Suhag, Deepa, editor, Thakur, Atul, editor, and Thakur, Preeti, editor

Published
2023
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35. Phyto-mediated synthesis of pure phase α-Bi2O3 nanostructures using Rubus ellipticus plant extract: photocatalytic activity and antimicrobial efficacy.

Author

Chauhan, Ankush, Verma, Ritesh, Dhatwalia, Jyoti, Kumari, Amita, Dutta, Vishal, Chandrasekaran, Gopalakrishnan, Ghotekar, Suresh, Kaur, Manpreet, Vignesh, Janani, and Thakur, Shabnam

Abstract

Bismuth-based nanoparticles are promising and widely employed in environmental cleanup. Eco-friendly Bi-based nanoparticle synthesis is being explored for nanoscale fabrication. In this study, we report on the green fabrication of alpha bismuth oxide nanoparticles (α-Bi2O3 NPs) using an extract from the Himalayan plant Rubus ellipticus. α-Bi2O3 nanoparticles were fabricated using methanol extract of the fruits (REF-NPs) and leaves (REL-NPs) of Rubus ellipticus. The optimal synthesis of α-Bi2O3 NPs was evaluated through X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FE-SEM), high-resolution transmission electron microscope (HR-TEM), UV-vis spectroscopy, and X-ray photoelectron spectroscopy (XPS) techniques for crystal structure, shape, and optical characteristics. The visible light photocatalytic degradation of toxic dye-Congo red using REF-NPs and REL-NPs was performed. The photocatalytic activity of the synthesized NPs was estimated to be in order of REL-NPs > REF-NPs, with photo-degradation efficiencies of 89.2% and 84.2%, respectively, for Congo red. REL-NPs exhibited the highest rate, which was found to be 1.4 times higher than the REF-NPs sample. Photodegradation experiments revealed that the fabricated α-Bi2O3 exhibits enhanced degradation performance for toxic Congo red dye. The antimicrobial efficacy of REL-NPs and REF-NPs against Gram-positive (S. aureus and B. subtilis) and Gram-negative (E. coli, K. pneumoniae, and P. aeruginosa) bacteria, was determined. This work presents a simple green method for producing innovative α-Bi2O3 as a remarkable nanomaterial for aquatic bodies to break down dangerous pollutants by visible light photodegradation and as an antibacterial agent. [ABSTRACT FROM AUTHOR]

Published
2024
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36. Silver Ions Modified α-Fe2O3 Nanoparticles: An Efficient Antibacterial Agent for Multidrug Resistant Bacteria.

Author

Verma, Ritesh, Selvaraj, Satheesh, Chauhan, Ankush, Subbarayan, Rajasekaran, Hikku, G. S., Ali, Aaliya, Thakur, Preeti, and Thakur, Atul

Subjects
*FACE centered cubic structure, *MULTIDRUG resistance in bacteria, *X-ray photoelectron spectroscopy, *TRANSMISSION electron microscopy, *ANTIBACTERIAL agents, *SILVER ions
Abstract

Herein, silver ions modified α-Fe2O3 (Ag: α-Fe2O3) nanoparticles were synthesized using a sol-gel auto-combustion method comprising of dual phase i.e. trigonal structure of α-Fe2O3 and FCC structure of Ag. The refinement results verified the existence of both the phase with R-3c: R s and Fm-3 m space group. Transmission Electron Microscopy (TEM) showed the crystallite size around 34.24 ± 2.00 nm. The percentage of Ag0 and Ag+ verified through X-ray Photoelectron Spectroscopy (XPS) clearly indicate that around 74% of the Ag present is in the metallic form. The cyclic voltammetry showed that the Csp of the Ag: α-Fe2O3 NPs modified electrode is 132 Fg − 1 and 100 Fg − 1 when recorded at a scan rate of 50 mVs− 1 and 75 mVs− 1, respectively. The Zones of Inhibition (ZOI) against bacterial strains generated by utilizing Ag: α-Fe2O3 NPs are clearly showed the ZOI of 19 ± 1 mm against Bacillus subtilis. The synthesized nanoparticles exhibited higher inhibition against the bacterial strains in comparison to the standard antibiotic ampicillin. Further, cell viability analysis suggested to use a concentration of 9 to 12 µg/ml for Ag: α-Fe2O3in invitro experiments. [ABSTRACT FROM AUTHOR]

Published
2024
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38. Applications of Multiferroics

Author

Jasrotia, Rohit, Suman, Khargotra, Rohit, Verma, Ankit, Sharma, Indu, Verma, Ritesh, Bhargava, Gagan Kumar, editor, Bhardwaj, Sumit, editor, Singh, Mahavir, editor, and Batoo, Khalid Mujasam, editor

Published
2021
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44. Phyto-mediated synthesis of pure phase α-Bi2O3nanostructures using Rubus ellipticusplant extract: photocatalytic activity and antimicrobial efficacy

Author

Chauhan, Ankush, Verma, Ritesh, Dhatwalia, Jyoti, Kumari, Amita, Dutta, Vishal, Chandrasekaran, Gopalakrishnan, Ghotekar, Suresh, Kaur, Manpreet, Vignesh, Janani, and Thakur, Shabnam

Abstract

Bismuth-based nanoparticles are promising and widely employed in environmental cleanup. Eco-friendly Bi-based nanoparticle synthesis is being explored for nanoscale fabrication. In this study, we report on the green fabrication of alpha bismuth oxide nanoparticles (α-Bi2O3NPs) using an extract from the Himalayan plant Rubus ellipticus. α-Bi2O3nanoparticles were fabricated using methanol extract of the fruits (REF-NPs) and leaves (REL-NPs) of Rubus ellipticus. The optimal synthesis of α-Bi2O3NPs was evaluated through X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FE-SEM), high-resolution transmission electron microscope (HR-TEM), UV-vis spectroscopy, and X-ray photoelectron spectroscopy (XPS) techniques for crystal structure, shape, and optical characteristics. The visible light photocatalytic degradation of toxic dye-Congo red using REF-NPs and REL-NPs was performed. The photocatalytic activity of the synthesized NPs was estimated to be in order of REL-NPs > REF-NPs, with photo-degradation efficiencies of 89.2% and 84.2%, respectively, for Congo red. REL-NPs exhibited the highest rate, which was found to be 1.4 times higher than the REF-NPs sample. Photodegradation experiments revealed that the fabricated α-Bi2O3exhibits enhanced degradation performance for toxic Congo red dye. The antimicrobial efficacy of REL-NPs and REF-NPs against Gram-positive (S. aureusand B. subtilis) and Gram-negative (E. coli, K. pneumoniae, and P. aeruginosa) bacteria, was determined. This work presents a simple green method for producing innovative α-Bi2O3as a remarkable nanomaterial for aquatic bodies to break down dangerous pollutants by visible light photodegradation and as an antibacterial agent.

Published
2024
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