Article
Chemistry, Inorganic & Nuclear
Suprabha Yadav, Anuj Mittal, Shankar Sharma, Anuradha Sharma, Kavitha Kumari, Naveen Kumar
Summary: The scientific community is focused on designing ideal semiconductor nanomaterials for ecosystem purification, and integrating Ag2O with the ZnO/Al2O3 binary system can significantly enhance photocatalytic properties and exhibit high activity towards model pollutants.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Karanpal Singh, Nancy, Harpreet Kaur, Pushpender Kumar Sharma, Gurjinder Singh, Jagpreet Singh
Summary: The study synthesized undoped and Cobalt-doped zinc oxide nanoparticles (Co doped ZnO NPs) and confirmed the incorporation of the Co dopant through spectroscopic and microscopic techniques. The Co-doped ZnO NPs showed a red shift in the UV-absorption spectra and a decrease in band gap value, indicating successful integration of Co2+ ions into the ZnO matrix. The synthesized NPs exhibited excellent photocatalytic and antimicrobial activity, with 1% Co-doped ZnO showing the highest photocatalytic efficiency.
Article
Biochemistry & Molecular Biology
Ru Jiang, Hua-Yue Zhu, Yong-Qian Fu, Sheng-Tao Jiang, En-Min Zong, Jian-Qiang Zhu, Ying-Ying Zhu, Li-Fan Chen
Summary: In this study, a colloidal CdS sensitized nano-ZnO/chitosan hydrogel was prepared and evaluated for the photodegradation of congo red under solar light irradiation. The CdS@n-ZnO/CS hydrogel showed excellent performance in CR removal, indicating its potential application in practical wastewater treatment. The synergistic effect of adsorption by chitosan and photocatalysis by ZnO and CdS contributed to the high efficiency of CR removal by CdS@n-ZnO/CS.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Biochemistry & Molecular Biology
Mahmoud Adel Ahmed, Ashraf A. Mohamed
Summary: The presence of hazardous pollutants in water sources due to industrial activities is a major environmental challenge. Chitosan and its derivatives are promising materials for the removal of various pollutants, as they have biological activity and abundant functional groups. Combining chitosan with photocatalysts improves mass transfer and enhances photocatalytic efficiency.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Shiwei Ma, Yunyun Huang, Ruoyu Hong, Xuesong Lu, Jianhua Li, Ying Zheng
Summary: The study focused on modifying zinc oxide (ZnO) nanoparticles using argon and hydrogen plasma, resulting in improved catalytic degradation performance on Rhodamine B. The treated ZnO exhibited significantly enhanced photocatalytic activity and stable reaction performance.
Article
Materials Science, Multidisciplinary
G. El Damrawi, H. Salaheldin, M. Abdelghany
Summary: This study focuses on the preparation and characterization of Al2O3/ZnO composites with different concentrations using a sol-gel method. Analysis of the structural features reveals the significant impact of varying Al2O3 to ZnO ratios on the product composition.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Zhenxia Li, Tengteng Guo, Yukun Chen, Qi Liu, Yuanzhao Chen
Summary: By activating the surface of nano materials and preparing composite asphalt, the aging problem of pavement has been effectively reduced and the performance of asphalt has been enhanced.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Merilin Rosenberg, Meeri Visnapuu, Kristjan Saal, Dmytro Danilian, Rainer Parna, Angela Ivask, Vambola Kisand
Summary: In the context of healthcare-acquired infections and the spread of antibiotic resistance, additional passive measures are urgently needed to prevent pathogen carryover. Antimicrobial high-touch surfaces, such as photocatalytic nano-ZnO and nano-ZnO/Ag-based surfaces with significant reduction in bacterial viability, show potential for mitigating the spread of bacteria. It is important to critically evaluate and select appropriate efficacy assessment methods based on end-use conditions for these surfaces.
Article
Pharmacology & Pharmacy
Florin Matusoiu, Adina Negrea, Nicoleta Sorina Nemes, Catalin Ianasi, Mihaela Ciopec, Petru Negrea, Narcis Duteanu, Paula Ianasi, Daniel Duda-Seiman, Delia Muntean
Summary: The antibacterial activity of zinc oxide particles has attracted significant attention worldwide. This study synthesized silica-based iron oxide matrix composites with different amounts of zinc oxide and evaluated their antimicrobial efficacy against various pathogens. The results showed that adding zinc oxide to the system increased the average porosity size of the material and enhanced its antibacterial properties.
Article
Chemistry, Multidisciplinary
Tom Naor, Shira Gigi, Nir Waiskopf, Gila Jacobi, Sivan Shoshani, Doron Kam, Shlomo Magdassi, Ehud Banin, Uri Banin
Summary: This study highlights the importance and potential applications of nanocomposites. The use of colloidal semiconductor nanocrystals as fillers provides catalytic, mechanical, photocatalytic, and antimicrobial properties in polymer composites. Different fabrication methods can yield hydrogels with complex architectures.
Review
Environmental Sciences
Jingjing Yu, Yuewei Yang, Fengfei Sun, Junfeng Chen
Summary: This review discusses the modification of various types of photocatalysts by nano silver, which improves the efficiency of photocatalysis and enables the degradation of organic pollutants. The review also identifies the drawbacks of existing nano silver-modified photocatalytic materials and suggests potential directions for improvement.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Xu Wang, Baiyu Zhang, Hua Ren, Yibin Jia, Honghuan Xia, Ping Guo
Summary: This study investigated the inhibitory effect of photoreactivation on antibiotic resistant bacteria and genes using UV with ZnO assistance. The results showed that all bacteria could be inactivated within 5 minutes and a 5 log gene reduction could be achieved within 4 hours after disinfection. Compared to individual UV treatment, significant inhibitions on bacteria and gene recoveries were observed after photoreactivation. Hydroxyl radicals generated during ZnO photocatalysis were found to be responsible for the inhibitory effect on photoreactivation, and the inactivation of intracellular genes followed a carpet model.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Multidisciplinary
N. A. Chopan, H. -T. -N. Chishti
Summary: Polypyrrole (PPy) and graphitic carbon nitride (g-C3N4) nanoparticles were added to ZnO nanorods to form a g-C3N4/PPy/ZnO (GPZ) photocatalytic system, resulting in improved charge-carrier transmission and separation. The GPZ photocatalyst exhibited outstanding photocatalytic activity, effectively degrading 99.0% of RhB within 60 minutes. The GPZ heterostructure also demonstrated superior antibacterial activity compared to other samples and excellent stability after multiple cycles.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
E. T. Deva Kumar, S. Easwaramoorthi, Raghava J. Rao
Summary: Cd2V2O7-ZnO, a type-II mixed oxide, was prepared with an aggregated porous morphology and high transparency. The mixed oxide exhibited excellent performance in the photocatalytic degradation of methylene blue dye.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hui Liu, Li Wang, Shanshan Wei, Yihai Wu, Yufei Zheng, Fei Yuan, Jinbo Hou
Summary: A novel Bi2WO6/nano-ZnO hybrid material was synthesized using a simple two-step hydrothermal method for photocatalytic degradation of amoxicillin in wastewater under visible light. The hybrid material, composed of many nanosheets in a layered structure, exhibited significantly improved photocatalytic activity compared to pure Bi2WO6 and nano-ZnO, with the Bi2WO6/nano-ZnO sample at a molar ratio of 1:3 showing the highest activity. The enhancement in photocatalytic activity is attributed to the reduction of band gap energy caused by the heterostructure formed by the two semiconductors, enabling effective separation and inhibition of recombination of photo generated charge carriers.
Review
Chemistry, Multidisciplinary
Anuradha Sharma, Jitender Jindal, Anuj Mittal, Kavitha Kumari, Sanjeev Maken, Naveen Kumar
Summary: Environmental pollution is a serious issue, particularly due to fossil fuel pollution increasing atmospheric CO2 levels. The use of carbon capture and storage technologies, as well as adsorption techniques with carbon materials, show promise for addressing this issue. Factors such as micropore volume, surface area, and introduction of basic functional groups play crucial roles in CO2 adsorption.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Shankar Sharma, Naveen Kumar, Bernabe Mari, Nar Singh Chauhan, Anuj Mittal, Sanjeev Maken, Kavitha Kumari
Summary: In this study, a series of TiO2/Bi2O3 and TiO2/Bi2O3/CuO composites were synthesized using the facile solution combustion approach, showing good optical characteristics and high photocatalytic efficiency for organic pollutant removal. The ternary composite with 10% Bi2O3 and 10% CuO exhibited the best photocatalytic performance, possibly due to the formation of heterojunctions and improved optical characteristics towards the visible region. The synthesized samples demonstrated fast removal of pollutants under visible LEDs, which is beneficial for cost-effective water purification techniques.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Vijaya Kumari, Shankar Sharma, Anuradha Sharma, Kavitha Kumari, Naveen Kumar
Summary: The study investigated the impact of synthesis conditions on the characteristics of hybridized ZnO nanocomposites and the photodegradation kinetics of Triclopyr using hydrothermally synthesized ZnO/CuO materials. It was found that synthesis conditions greatly influence the morphology, particle size, and crystal growth of nanomaterials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Suprabha Yadav, Jitender Jindal, Anuj Mittal, Shankar Sharma, Kavitha Kumari, Naveen Kumar
Summary: In this study, photoactive Li doped ZnO nano-materials were successfully synthesized using a low-temperature solution combustion approach, with the introduction of lithium improving the photocatalytic characteristics of ZnO. The results demonstrate that ZnO nanomaterials doped with 5 mol% Li exhibited the highest photocatalytic activity for the degradation of organic dye and pesticide pollutants. The enhancement in charge transferability and alteration in optical and surface properties due to lithium doping contributed to the superior photocatalytic performance of Li doped ZnO.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Nanoscience & Nanotechnology
Suprabha Yadav, Anuj Mittal, Shankar Sharma, Anuradha Sharma, Kavitha Kumari, Naveen Kumar
Summary: In this study, Ag-sensitized ZnO/SnO2 was used to improve photocatalytic properties, with analyses including XRD, FESEM, XPS, HRTEM, and UV-DRS confirming good crystallinity, uniform dispersion of Ag nanoparticles, and efficient photocatalytic degradation of pollutants. The superior performance was attributed to surface plasmon effects and charge transfer between semiconductors, showing promise for cost-effective water purification systems.
APPLIED NANOSCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Anuradha Sharma, Anuj Mittal, Shankar Sharma, Kavitha Kumari, Sanjeev Maken, Naveen Kumar
Summary: The study showed that the modification with Cu2+ ions significantly enhanced the photocatalytic activity of α-beta Bi2O3, leading to complete degradation of pollutants in a short period of time. The sample with 2 mol% Cu in Bi2O3 lattice exhibited the highest activity, attributed to the effective separation of charge carriers due to Cu2+ doping and formation of alpha-beta phase heterojunctions.
APPLIED NANOSCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Shankar Sharma, Anuj Mittal, Nar Singh Chauhan, Sangeeta Saini, Jyoti Yadav, Manoj Kushwaha, Rahul Chakraborty, Shantanu Sengupta, Kavitha Kumari, Naveen Kumar
Summary: An energy efficient hydrothermal route was used to synthesize binary TiO2/Bi2O3, followed by a chemical method to prepare novel ternary TiO2/Bi2O3/Pd nanocomposites. The resulting composites showed improved characteristics and high activity towards the degradation of RhB under visible LED irradiation, even after cyclic experiments. Scavenger studies revealed the active species responsible for RhB removal, making the synthesized composites promising for low power consuming photoreactors in water purification systems.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Anuradha Sharma, Naveen Kumar, Mika Sillanpaa, Peter R. Makgwane, Suresh Kumar, Kavitha Kumari
Summary: Deterioration of water quality is a global threat, with industrial development regularly adding a large amount of organic and inorganic contaminants to water. Therefore, removing these contaminants is crucial for the health of biotic components. Carbon nanomaterials have been widely adopted as adsorbents due to their outstanding surface characteristics.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Anuradha Sharma, Shankar Sharma, Peter R. Makgwane, Vijaya Kumari, Vijaya Kumari, Jyoti Kataria, Naveen Kumar
Summary: A novel Ag@AgCl decorated Cu2+-Bi2O3 nanocomposite was successfully constructed and thoroughly characterized. The nanocomposite exhibited superior photocatalytic performance with a removal rate of 99.60% for RhB dye.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Environmental Sciences
Anuradha Sharma, Shankar Sharma, Naveen Kumar, W. A. Diery, Elie A. Moujaes, Muhammad Tahir, Pardeep Singh
Summary: This study focuses on the fabrication of metal ion-doped Bi2O3 photocatalysts and their application in the decontamination of Rhodamine B and Triclopyr. The synthesized materials were characterized using various techniques, and adsorption aspects of the pollutants were studied. The modification with metal ions significantly improved the removal efficiency of the photocatalyst, and Co+2/Bi2O3 showed the highest degradation efficiency. The mechanism of charge transfer and degradation of the pollutants was also presented.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Vijaya Kumari, Anuradha Sharma, Naveen Kumar, Mika Sillanpaa, Peter R. Makgwane, Md. Ahmaruzzaman, Ahmad Hosseini-Bandegharaei, Manju Rani, P. Chinnamuthu
Summary: Industrial pollution is a significant issue in the world of continuous innovation and intensive development. Organic contaminants from textile industries cause environmental damage and sustainability issues. Heterogeneous photocatalysis using TiO2-CeO2 based nanostructure semiconductor materials has shown great potential for efficient removal of these pollutants under light irradiation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Energy & Fuels
Abdelmoumin Yahia Zerga, Muhammad Tahir, Hajar Alias, Naveen Kumar
Summary: Two-dimensional titanium carbide MXenes have gained increasing attention in photocatalytic applications due to their prominent electrical conductivity, optical properties, and abundant surface functional groups. The unique layered microstructure characteristics of Ti3C2 provide a large surface area, interlayer spacing, and hydrophilic surface functional groups, contributing to their high photocatalytic efficiency.
Article
Environmental Sciences
Naveen Kumar, Monika Kumari, Mohammed Ismael, Muhammad Tahir, Raj Kishore Sharma, Kavitha Kumari, Janardhan Reddy Koduru, Pardeep Singh
Summary: Graphitic carbon nitride (g-C3N4)-based materials have unique properties that make them suitable for designing photocatalytic and sensing materials. In this review, the structure, properties, and synthesis strategies of g-C3N4 and its assisted materials are introduced. The use of g-C3N4 in composites with metal oxides, sulfides, noble metals, and graphene is elaborated. The application of g-C3N4 and its assisted materials in sensing toxic gases and VOCs, as well as decontaminating NOx and VOCs by photocatalysis, is summarized. Overall, this review provides valuable insights for developing practical applications of g-C3N4-based photocatalysts and sensors.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Shankar Sharma, Pinki Sharma, Anuj Mittal, Anuradha Sharma, David E. Motaung, Nar Singh Chauhan, Naveen Kumar
Summary: TiO2/Bi2O3/PANI nano-composite materials were synthesized and characterized for biological applications. The materials were found to disrupt the structure and membrane of bacteria through reactive oxygen species. They also showed potential as quorum sensing inhibitors and anti-biofilm agents. Additionally, the synthesized materials served as a biosensor for glucose detection, facilitating communication between the electrode surface and enzymes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Thermodynamics
Deepak Parmar, Manju Rani, Naveen Kumar, Noureddine Issaoui, Omar M. M. Al-Dossary, Kavitha Kumari, Shruti Jain, Leda G. Bousiakoug
Summary: The molecular interactions of ternary mixtures of 1-propanol + 1,3-diaminopropane + methyl acetate were studied by measuring the physicochemical properties of the liquid mixtures. Various properties such as density, viscosity, speed of sound, and refractive index were measured at different temperatures and pressures. The experimental data was used to calculate excess molar volume, deviation in viscosity, excess molar isentropic compressibility, excess free volume, and other properties.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)