Plant-Assisted Synthesis of ZrO2 Nanoparticles Using Cycas revoluta Extract for Doxycycline Removal from Aqueous Solutions Dishant Sharma, Ruchi Bharti, Priya Kaushik, Renu Sharma, Manas Sutradhar Applied Sciences Switzerland, 2026 Zirconium oxide nanoparticles (ZrO2 NPs) were synthesized via a plant-assisted route using Cycas revoluta leaf extract as a natural reducing and stabilizing agent. The synthesis and properties of the NPs were confirmed using UV–Vis, FTIR, XRD, SEM-EDS, HR-TEM/SAED, DLS, and zeta potential measurements. The adsorption performance of ZrO2 NPs toward doxycycline from water was investigated by varying pH, adsorbent dose, initial concentration, temperature, and contact time. Under the optimum conditions (pH 7, 50 mg adsorbent in 50 mL, 10 mg L−1 doxycycline, 60 °C, 180 min), a maximum removal efficiency of 60.81% was achieved. The equilibrium data were fitted using the Langmuir model, giving an estimated qmax of 11.276 mg g−1; however, this value should be interpreted cautiously because of the limited number of isotherm data points. The time-dependent adsorption data were empirically described using both pseudo-first-order and pseudo-second-order kinetic models without assigning strict superiority to either model. These results indicate that green-synthesized ZrO2 NPs can serve as a low-impact adsorbent for removal of pharmaceutical contaminants in water.
Green Synthesis of ZrO2 Nanoparticles from Cynodon dactylon: Structural Characterization, Antioxidant Performance, and Corrosion Inhibition of Mild Steel Shobhit Sharma, Ruchi Bharti, Renu Sharma Chempluschem, 2026 Zirconia (ZrO 2 ) nanoparticles (NPs) were biosynthesized using Cynodon dactylon leaf extract via an environmentally benign route and evaluated for antioxidant activity and corrosion protection of mild steel in acidic media. X‐ray diffraction confirmed nanocrystalline tetragonal ZrO 2 , while Fourier transform infrared spectroscopy evidenced phytochemical functionalities that cap and stabilize the particle surface. Scanning electron microscope and transmission electron microscopy revealed agglomerated morphologies composed of nanoscale primary particles; consistent with this, dynamic light scattering showed micrometer‐scale hydrodynamic diameters arising from aqueous aggregation. NP formation and aggregation were strongly governed by alkaline pH, reaction time, temperature, and extract concentration, which collectively modulate nucleation, growth, and surface stabilization. Electrochemical and gravimetric assessments (potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and weight loss) demonstrated dose‐dependent inhibition, achieving a maximum protection efficiency of 82.5%. EIS responses showed enlarged Nyquist semicircles and increased charge transfer resistance, indicating development of a compact barrier layer on steel. Weight‐loss measurements yielded inhibition efficiencies of ∼23.5% after 24 h and ∼64.7% after 48 h. Antioxidant performance of C. dactylon extracts was quantified using 2,2‐diphenyl‐1‐picrylhydrazyl and 2,2′‐azinobis(3‐ethylbenzothiazoline‐6‐sulfonic acid) (ABTS) assays, with methanolic extracts exhibiting the highest radical‐scavenging activity. Collectively, these results establish C. dactylon‐ derived ZrO 2 as multifunctional nanoadditives with coupled antioxidant and mixed‐type anticorrosive behavior supported by adsorption‐based mechanistic interpretation. This integrated study connects synthesis optimization to corrosion and antioxidant performance.
Green Aeonium Arboreum-Synthesis of Nickel Nanoparticles for Efficient Removal of Paracetamol From Water Komal Gupta, Ruchi Bharti, Renu Sharma, Priya Kaushik, Monika Verma, et al. Chemistry an Asian Journal, 2026 This study offers a green methodology for synthesis of nickel nanoparticles (Ni NPs) employing Aeonium Arboreum ( A. arboreum ) extract and the removal of paracetamol from aqueous solution. This methodology was optimized by varying key parameters, achieving 0.5 M nickel chloride, a 1:4 extract‐to‐metal ratio, pH 12, 48 h reaction time, and 40°C as the optimal condition for stable Ni NPs. The stability and properties of the nanoparticles are confirmed by employing different characterization instruments including UV–vis spectrophotometry, Fourier transform infrared spectroscopy, scanning electron microscope‐energy dispersive x‐ray, dynamic light scattering analysis x‐ray diffraction, and zeta potential. The synthesized Ni NPs demonstrated significant potential for paracetamol removal, achieving highest removal of 53.5%, corresponding to an adsorption capacity ( q e ) of 8.56 mg g − 1 , from aqueous solutions under optimized conditions (75 mg Ni NPs, 40 ppm paracetamol, pH 12, and 90 min contact time). The adsorption behavior indicated strong interactions among Ni NPs and paracetamol, enhancing their potential in water treatment applications. This methodology demonstrates the applications of green synthesized Ni NPs for sustainable environmental remediation aligned with the sustainable development goals.
Green synthesis of biofunctionalized iron oxide nanoparticles using lagerstroemia indica: structural characterization, antioxidant potential, and corrosion inhibition efficiency Divya Kundu, Ruchi Bharti, Uma Koul, Ajay Thakur, Monika Verma, et al. Nano Express, 2026 This study reports a green, one-pot synthesis of biofunctionalized iron-oxide nanoparticles (Fe 3 O 4 / γ -Fe 2 O 3 ) using Lagerstroemia indica leaf extract as a combined reducing/capping system. X-ray diffraction confirms mixed magnetite/maghemite phases, while UV–Vis and FTIR support phytochemical surface passivation. SEM-EDX shows agglomerated nanoscale domains enriched in Fe and O; DLS and ζ-potential indicate colloidal stabilization by plant-derived polyphenols. Antioxidant activity quantified by DPPH, ABTS, and total antioxidant capacity increases with dose, achieving up to 92.9% DPPH scavenging at 200 μg ml −1 . Potentiodynamic polarization and electrochemical impedance spectroscopy in 0.5 M HCl demonstrate mixed-type inhibition with maximum efficiency of ∼75% at 200 mg l −1 , attributed to synergistic adsorption of phytochemical shells and mixed-valence Fe centers that impede charge transfer. The aqueous, additive-lean process furnishes multifunctional nanomaterials with practical antioxidant and corrosion-protection performance.
Development of fullerenes and their derivatives Ruchi Bharti, Ajay Thakur, Monika Verma, Renu Sharma, Neha Sen Handbook of Functionalized Carbon Nanostructures from Synthesis Methods to Applications, 2024
Low temperature synthesis of carbon nanostructures Ruchi Bharti, Priya Kaushik, Shivani Naik, Ajay Thakur, Monika Verma, et al. Handbook of Functionalized Carbon Nanostructures from Synthesis Methods to Applications, 2024
Plant-Assisted Synthesis of ZrO 2 Nanoparticles Using Cycas revoluta Extract for Doxycycline Removal from Aqueous Solutions D Sharma, R Bharti, P Kaushik, R Sharma, M Sutradhar Applied Sciences 16 (10), 4714 , 2026 2026
Density Functional Theory (DFT), ADME, Molecular Docking and Molecular Dynamics Simulations of Synthesized 1, 2, 3, 4-tetrahydropyrimidine Derivatives R Bansal, GK Inwati, P Sharma, A Kumar, R Bharti Catalysis Letters 156 (4), 88 , 2026 2026
Green Synthesis of ZrO 2 Nanoparticles from Cynodon dactylon : Structural Characterization, Antioxidant Performance, and Corrosion Inhibition of Mild Steel S Sharma, R Bharti, R Sharma ChemPlusChem 91 (4), e202600006 , 2026 2026
Pharmacological Activities of Alkaloids RS Shivani Naik, Ruchi Bharti 2026
Green Aeonium Arboreum ‐Synthesis of Nickel Nanoparticles for Efficient Removal of Paracetamol From Water K Gupta, R Bharti, R Sharma, P Kaushik, M Verma, M Mahardika, ... Chemistry–An Asian Journal 21 (5), e70681 , 2026 2026
Green synthesis of biofunctionalized iron oxide nanoparticles using lagerstroemia indica : structural characterization, antioxidant potential, and corrosion inhibition … D Kundu, R Bharti, U Koul, A Thakur, M Verma, R Sharma, A Pandey Nano Express 7 (1), 015007 , 2026 2026 Citations: 1
Green synthesis of polypyrrole-SnO2 nanocomposites using Foeniculum vulgare extract for crystal violet adsorption and solvent-dependent radical scavenging P Kaushik, R Bharti, R Sharma, A Pandey RSC Advances 2026 (16), 6967-6984 , 2026 2026 Citations: 1
AI in Retrosynthesis: Introduction, Methods, Evaluation, and Future Directions R Bharti, A Thakur, U Koul, M Verma, R Sharma Applied Artificial Intelligence for Drug Discovery: From Data-Driven … , 2026 2026
Green synthesis of Ca–CuO nanocomposites using Lobularia maritima: Multifunctional photocatalytic, antioxidant, and anti-corrosion applications U Koul, R Bharti, R Sharma, A Pandey Next Materials 10, 101563 , 2026 2026 Citations: 2
Sustainable synthesis of silver oxide nanoparticles from Lobularia maritima: a new approach to antioxidant and photocatalytic applications MVAP Uma Koul, Ruchi Bharti, Renu Sharma, Ajay Thakur Nano Express 6 (4), 045016 , 2025 2025
Plant-Mediated Synthesis of Electrocatalytically Active Cd–Cs Mixed Oxide Nanocomposites and Their Multifunctional Antioxidant and Anticorrosive Performance S Naik, R Bharti, R Sharma, SAC Carabineiro, M Sutradhar Surfaces 8 (4), 91 , 2025 2025 Citations: 5
Eco-friendly Synthesis and Characterization of Bioactive Iron Oxide Nanoparticles Using Tagetes erecta Leaf Extract for Antioxidant and Anti-Corrosion Application S Sharma, R Bharti, A Thakur, R Sharma, M Verma Orbital: The Electronic Journal of Chemistry, 444-455 , 2025 2025
Green Synthesis of Chromium Nanoparticles Using ‘Fred Ives’: A Sustainable Solution for Dye Removal APS Atulya Rajvanshi, Monika Verma, Ruchi Bharti, Uma Koul, Renu Sharma ChemistrySelect , 2025 2025 Citations: 1
Eco-Friendly Alchemy: Harnessing Nature's Power for the Green Synthesis of Nanomaterials P Kaushik, R Bharti, R Sharma, M Verma Exploring Nanotechnology for a Sustainable Economy, 151-173 , 2025 2025
Nanotechnology in Environmental Remediation M Verma, R Bharti, R Sharma Exploring Nanotechnology for a Sustainable Economy, 93-124 , 2025 2025
Microwave-assisted Cr 2 O 3 nanoparticle-catalyzed synthesis of 2-amino-4 H -chromenes: evaluation of antioxidant, corrosion inhibition, and molecular docking … M Okram, R Bharti, R Sharma, M Verma, R Bansal Research on Chemical Intermediates 51 (11), 6049-6086 , 2025 2025 Citations: 5
Spirooxindole Alkaloids: Recent Progress in Synthesis using Isatin as a Versatile Building Block in Multicomponent Reactions LD Devi, OM Singh, M Okram, R Bharti Mini-Reviews in Organic Chemistry , 2025 2025
Biogenic Bismuth Nanoparticles from Hippeastrum puniceum (lam). voss for Enhanced Removal of Methylene Blue from Wastewater R Kaur, R Bharti, P Kaushik, M Sharma, Renu and Verma Current Nanoscience , 2025 2025
Eco-friendly synthesis of cobalt nanoparticles from Erythrina crista-galli leaves for enhanced anticorrosive performance D Kaur, M Verma, R Bharti, S Naik, R Sharma Chemical Papers 79 (9), 5875-5897 , 2025 2025 Citations: 9
Innovative green synthesis and multifunctional applications of pyrimidopyrimidine derivatives R Bharti, A Thakral, A Thakur, B Sahu, M Verma, R Sharma, P Narwal, ... Current Organic Synthesis 22 (6), 769-789 , 2025 2025 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
Effect of heavy metals: An overview R Bharti, R Sharma Materials Today: Proceedings 51, 880-885 , 2022 2022 Citations: 501
Pharmacological activities and toxicities of alkaloids on human health A Rajput, R Sharma, R Bharti Materials Today: Proceedings 48, 1407-1415 , 2022 2022 Citations: 175
Municipal solid waste as a source of energy A Kaur, R Bharti, R Sharma Materials Today: Proceedings 81, 904-915 , 2023 2023 Citations: 140
Oxazole and isoxazole: From one-pot synthesis to medical applications A Thakur, M Verma, R Bharti, R Sharma Tetrahedron 119, 132813 , 2022 2022 Citations: 88
Progress in synthesis and applications of Polyaniline-Coated Nanocomposites: A comprehensive review P Kaushik, R Bharti, R Sharma, M Verma, RT Olsson, A Pandey European Polymer Journal 221, 113574 , 2024 2024 Citations: 80
Carbon nanotubes: types, synthesis, cytotoxicity and applications in biomedical A Thakur, R Bharti, R Sharma Materials Today: Proceedings 50, 2256-2268 , 2022 2022 Citations: 49
One‐pot Synthesis of Highly Functionalized Tetrahydropyridines: A Camphoresulfonic Acid Catalyzed Multicomponent Reaction R Bharti, T Parvin Journal of Heterocyclic Chemistry 52 (6), 1806-1811 , 2015 2015 Citations: 40
Molecular diversity from the L-proline-catalyzed, three-component reactions of 4-hydroxycoumarin, aldehyde, and 3-aminopyrazole or 1, 3-dimethyl-6-aminouracil R Bharti, T Parvin Synthetic Communications 45 (12), 1442-1450 , 2015 2015 Citations: 38
Role of artificial intelligence in chemistry N Choudhary, R Bharti, R Sharma Materials Today: Proceedings 48, 1527-1533 , 2022 2022 Citations: 36
Diversity oriented synthesis of tri-substituted methane containing aminouracil and hydroxynaphthoquinone/hydroxycoumarin moiety using organocatalysed multicomponent reactions … R Bharti, T Parvin RSC advances 5 (82), 66833-66839 , 2015 2015 Citations: 33
Recent advances in utilization of deep eutectic solvents: an environmentally friendly pathway for multi-component synthesis A Thakur, M Verma, R Bharti, R Sharma Current Organic Chemistry 26 (3), 299-323 , 2022 2022 Citations: 31
Synthesis of aminouracil-tethered tri-substituted methanes in water by iodine-catalyzed multicomponent reactions P Kumari, R Bharti, T Parvin Molecular Diversity 23 (1), 205-213 , 2019 2019 Citations: 31
Multicomponent synthesis of diverse pyrano-fused benzophenazines using bifunctional thiourea-based organocatalyst in aqueous medium R Bharti, T Parvin Molecular diversity 20 (4), 867-876 , 2016 2016 Citations: 31
DFT analysis and in vitro studies of isoxazole derivatives as potent antioxidant and antibacterial agents synthesized via one-pot methodology: A. Thakur et al. A Thakur, M Verma, P Setia, R Bharti, R Sharma, A Sharma, NP Negi, ... Research on Chemical Intermediates 49 (3), 859-883 , 2023 2023 Citations: 26
Analysis of plastic waste management: Utilization, issues & solutions R Bharti, R Sharma Materials Today: Proceedings 45, 3625-3632 , 2021 2021 Citations: 26
Antibacterial and antioxidant assay of novel heteroaryl-substituted methane derivatives synthesized via ceric ammonium nitrate (CAN) catalyzed one-pot green approach M Verma, A Thakur, S Kapil, R Sharma, A Sharma, R Bharti Molecular Diversity 27 (2), 889-900 , 2023 2023 Citations: 25
Recent advances of aminopyrimidines in multicomponent reactions R Bharti, P Kumari, T Parvin, LH Choudhury Current Organic Chemistry 22 (5), 417-445 , 2018 2018 Citations: 25
Molecular diversity from the three-component reaction of 2-hydroxy-1, 4-naphthaquinone, aldehydes and 6-aminouracils: a reaction condition dependent MCR R Bharti, P Kumari, T Parvin, LH Choudhury RSC advances 7 (7), 3928-3933 , 2017 2017 Citations: 25
Green synthesis of iron oxide nanoparticles from Mexican prickly poppy (Argemone mexicana): assessing antioxidant activity for potential therapeutic use A Nughwal, R Bharti, A Thakur, M Verma, R Sharma, A Pandey RSC advances 15 (13), 10287-10297 , 2025 2025 Citations: 24
Regioselective synthesis of pyrimidine-fused tetrahydropyridines and pyridines by microwave-assisted one-pot reaction P Kumari, R Yadav, R Bharti, T Parvin Molecular Diversity 24 (1), 107-117 , 2020 2020 Citations: 24
