Article
Engineering, Environmental
Jingzhen Wang, Linlin Zang, Libin Wang, Yutong Tian, Zhiyu Yang, Yumei Yue, Liguo Sun
Summary: Magnetic porous cobalt ferrite/reduced graphene oxide (CF/rGO) balls were prepared as a potential photocatalyst for effective degradation of oxytetracycline. The strong interfacial interaction between cobalt ferrite nanoparticles and reduced graphene oxide, along with the porous spherical structure, enhanced the photocatalytic efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Shareen Shafique, Shuming Yang, Taimoor Iqbal, Biyao Cheng, Yiming Wang, Haris Sarwar, Yonas Tesfaye Woldu, Peirui Ji
Summary: Hybrid nanocomposite photodetectors, formed by hybridising 2D rGO onto 1D V2O5 nanorods using the hydrothermal method, exhibit excellent electrical and photoconduction properties. Optimised photodetectors with the ideal content of rGO intercalated into V2O5 nanorods show improved photoresponse and photovoltaic behavior under specific conditions.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Polymer Science
Zabn Allah M. Alaizeri, Hisham A. Alhadlaq, Saad Aldawood, Mohd Javed Akhtar, Maqusood Ahamed
Summary: This study investigates the photocatalytic activity and anticancer efficacy of tin oxide-reduced graphene oxide nanocomposites (SnO2-rGO NCs). The results show that the addition of graphene derivatives improves the degradation efficiency of methylene blue dye and enhances the anticancer efficacy against liver and lung cancer cells compared to pure SnO2 NPs.
Article
Engineering, Environmental
Aparna Prabha Devi, Deepak Kumar Padhi, Ashish Madhual, Pravat Manjari Mishra, Ajay Kumar Behera
Summary: A plant biomass mediated ecofriendly synthesis approach was used to design gold nanoparticles (gAuNPs) on reduced graphene oxide (RGO) using Averrhoa carambola leaf extract at room temperature. The combination of folded RGO sheets and polar biomolecules of the leaf extract helped enhance the growth inhibition effect and significantly reduce the size of gAuNPs in the nanocomposite. The synthesized compound was characterized using various techniques including XRD, TEM,STEMHAADF, Raman, FT-IR, and UV-Vis DRS spectra, revealing a size of 8±3 nm for gAuNPs on 2D-RGO sheets. The gAuNPs loaded on RGO exhibited high photocatalytic degradation rates for various pollutants under visible light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
M. A. Majeed Khan, Sushil Kumar, Maqusood Ahamed, Jahangeer Ahmed, Avshish Kumar, Muhammad Ali Shar
Summary: The BaTiO3 nanoparticles and BaTiO3@rGO nanocomposite were successfully prepared and characterized through various analysis techniques. The dielectric properties of the samples were studied, and the photocatalytic performance of the BaTiO3@rGO nanocomposite was found to be superior to the nanoparticles, possibly due to its larger surface area and efficient separation of photo-excited electron-hole pairs.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Ningkai Ding, Bin Chen, Liang Zhou, Lingzhi Wang, Yongdi Liu, Jinlong Zhang, Juying Lei
Summary: In this study, Z-scheme V2O5-loaded fluorinated inverse opal carbon nitride was successfully synthesized using a ternary collaborative modification approach. The catalyst exhibited the highest photocatalytic activity and rate constant for the degradation of organic pollutants and was also effective in removing antibiotics. The improved performance of the catalyst was attributed to its increased specific surface area, narrowed bandgap, and enhanced visible light utilization capacity. Mechanism studies confirmed the formation of a Z-scheme heterojunction, which promoted the migration of photo-generated charge carriers and provided sufficient free radicals for the degradation process. The combination of different modifications synergistically enhanced the removal efficiency for different organic pollutants.
CHINESE CHEMICAL LETTERS
(2022)
Article
Engineering, Environmental
Lizhu Chen, Xueting Xie, Xianliang Song, Shucan Luo, Shengying Ye, Wenbei Situ
Summary: MTR, a novel nano-composite photocatalyst synthesized for ethylene degradation, showed small band gaps, good conductivity, improved charge transfer, and stable photocatalytic activity. It has the potential to maintain the quality of harvested fruits and vegetables effectively.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Sidra Bibi, Awais Ahmad, Mohsin Ali Raza Anjum, Abdul Haleem, Muhammad Siddiq, Syed Sakhawat Shah, Abdullah Al Kahtani
Summary: The reduced graphene oxide-based iron oxide modified titania composite exhibited excellent photocatalytic performance for the degradation of malachite green and methylene blue under visible light, showing great potential for visible light-driven photocatalytic degradation processes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
P. Vivek, R. Sivakumar, E. Selva Esakki, S. Deivanayaki
Summary: NiO/RGO nanocomposites were synthesized by hydrothermal method and their chemical structure was confirmed by XRD, Raman spectra, and XPS analysis. FESEM and HRTEM were used for morphological investigations. UV-DRS spectroscopy showed a reduced bandgap of NiO after incorporation with RGO. NiO/RGO nanocomposites exhibited superior photocatalytic performance in degrading RhB dye, with a rate constant of 0.015871 min-1, 1.4 times higher than NiO. Scavenging test confirmed the involvement of ·OH radicals in the photodegradation process. The cyclic test validated the stability of the photocatalyst. This NiO/RGO nanocomposite has demonstrated excellent potential as a catalyst for removing organic pollutants from wastewater.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Environmental Sciences
M. C. Shibu, M. D. Benoy, S. Shanavas, J. Duraimurugan, G. Suresh Kumar, Mohammad Abu Haija, P. Maadeswaran, T. Ahamad, Quyet Van Le, S. M. Alshehri
Summary: SnO2 and SnO2/rGO nanostructures were successfully synthesized and their properties were studied using various techniques. The results showed an enhancement in the photocatalytic properties of the SnO2/rGO nanostructures.
Article
Chemistry, Physical
Imran Hasan, Akshara Bassi, Kushal Kanungo, Bon Heun Koo
Summary: The present study successfully synthesized PANI-rGO@MnO2 nanocomposites by reinforcing Manganese (IV) oxide nanoparticles (MnO2 NPs) in the reduced graphene oxide (rGO) matrix and copolymerizing aniline monomer. The synthesized material was characterized using various analytical techniques and showed improved properties in terms of electron transfer and optical properties. The material also exhibited high photocatalytic efficiency in the degradation of ibuprofen (IBP) drug. The scavenger experiments confirmed the role of superoxide radicals in the degradation process.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Environmental Sciences
Junyue Shan, Xianliang Wu, Caifang Li, Jiwei Hu, Zhenming Zhang, Huijuan Liu, Pinhua Xia, Xianfei Huang
Summary: The photocatalytic degradation of antibiotics using Fe3O4/g-C3N4/rGO composites was studied. The composites exhibited high photocatalytic activity, and the degradation of tetracycline hydrochloride (TCH) was analyzed. The study also proposed a possible photocatalytic mechanism of the Fe3O4/g-C3N4/rGO photocatalyst.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Mostafa Y. Y. Nassar, Mona S. S. NourEldien, Islam M. M. Ibrahim, Hisham M. M. Aly
Summary: A novel UV-light-active MCC/S-VO2 photocatalyst was synthesized via hydrothermal route. Various techniques were used for the characterization of the photocatalyst. The photocatalytic degradation of methylene blue (MB) by MCC/S-VO2 showed superior performance compared to pure V2O5 and doped S-VO2. The addition of H2O2 significantly enhanced the photodegradation of MB.
Article
Environmental Sciences
Namrata Roy, Krishnan Kannabiran, Amitava Mukherjee
Summary: Ferrocene functionalized rGO-ZnO nanocomposite was synthesized via hydrothermal method and showed superior photocatalytic activity in the degradation of pharmaceuticals under UV C light. The integration of Fc@rGO and ZnO enhanced light harvesting, charge carrier interface, and charge separation, leading to a fivefold increase in removal efficiency compared to pristine ZnO. The nanocomposite also exhibited low toxicity and reusability for multiple cycles, making it environmentally sustainable and suitable for practical applications in antibiotic treatment.
Article
Chemistry, Physical
Ulyana Kologrieva, Anton Volkov, Irina Krasnyanskaya, Pavel Stulov, Dmitry Wainstein
Summary: The paper introduces hydrometallurgical methods to recycle wastes of vanadium pentoxide chemical fabrication. Concentrates with high V2O5 content can be obtained through counterflow leaching and reduction precipitation. Moreover, suitable vanadium solutions for hydrolysis and precipitation can be obtained through multistage counterflow leaching. The paper also provides detailed consumption and technological parameters.
Article
Chemistry, Physical
Vaikundamoorthy Ramalingam, Harshavardhan Mohan, Inho Hwang
Summary: In this study, a reduced graphene oxide (RGO) decorated with monodisperse superparamagnetic Fe3O4 (RGO-IO) nanocomposite was successfully prepared and confirmed through various spectroscopic and microscopic techniques. The nanocomposite exhibited good dispersibility and homogenous composition, as well as excellent electrochemical performance. It showed low cytotoxicity and promoted cellular growth. Moreover, the nanocomposite induced the formation of muscle cells and adipocytes, and upregulated the expression of marker proteins. This study is of great significance for the application of nanomaterials in tissue engineering and regenerative medicine.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
E. Thenmozhi, M. Harshavardhan, S. Kamala-Kannan, V Janaki
Summary: A shell-type mesoporous silica-manganese dioxide (MPS-(MnO2)) nanocomposite was prepared and studied for its photodegradation of Methylene blue (MB) in synthetic solution under visible light. SiO2 doping was found to decrease the band gap of MnO2, increasing the visible light absorption. Under optimized conditions, MPS-(MnO2) efficiently degraded 89.4% of MB from the synthetic solution.
Article
Materials Science, Multidisciplinary
Suhwan Yoo, Harshavardhan Mohan, Hyeon Seung Oh, Gitae Kim, Jae R. Hahn, Taeho Shin
Summary: The synthesized Pd@PdS core shell nanocubes demonstrated high efficiency in degrading methylparaben, attributed to enhanced light absorption and charge transfer at the core-shell interface.
Article
Environmental Sciences
Ga Hyeon Ha, Harshavardhan Mohan, Hyeon Seung Oh, Gitae Kim, Kamala-Kannan Seralathan, Taeho Shin
Summary: The widespread use of antibiotics has led to their continuous release and presence in the ecosystem, resulting in the emergence of antibiotic-resistant bacteria in aquatic environments. In this study, Ag/Ag2S@BiOI nanowires were synthesized and used as photocatalysts for the degradation of a model antibiotic, tetracycline. The nanowires showed efficient degradation performance under optimal conditions and exhibited negligible toxicity towards cells, indicating their potential as promising photocatalysts.
Article
Chemistry, Multidisciplinary
Harshavardhan Mohan, Natesan Karthi, Pavithra Muthukumar Sathya, Vaikundamoorthy Ramalingam, Srivalli Thimmarayan, Mohammad Amjad Hossain, Adithan Aravinthan, Taeho Shin
Summary: This study synthesized (Zn, Ni)-ferrite nanoparticles using a chemical co-precipitation method and evaluated their cytotoxicity and osteogenic properties. The results showed that these nanoparticles had low toxicity and could potentially be used as biomaterials in regenerative medicine.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Microbiology
Vino Udappusamy, Harshavardhan Mohan, Rajan Thinagaran
Summary: This study found that the essential oil-loaded nano-emulsion formulation of Lantana camara L. had a mosquitocidal effect and could reduce the activity of acetylcholinesterase and alkaline phosphatase. This suggests that nano-emulsion has the potential for mosquito management.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Environmental Sciences
Harshavardhan Mohan, Pavithra Muthukumar Sathya, Sethumathavan Vadivel, Ga Hyeon Ha, Hyeon Seung Oh, Gitae Kim, Kamala-Kannan Seralathan, Taeho Shin
Summary: Pharmaceuticals and personal care products contribute to environmental pollution at alarming rates. Nanomaterial based photocatalysis, such as the synthesized Nickel zinc ferrite nanoparticles in this study, shows great potential for reducing the concentration of PPCPs. The nanoparticles successfully degraded diclofenac with high efficiency and minimal toxicity, making them promising photocatalysts.
Review
Environmental Sciences
Harshavardhan Mohan, Sethumathavan Vadivel, Saravanan Rajendran
Summary: Harmful algal blooms (HABs) are a global problem caused by human activities such as eutrophication and climate change. Photocatalysis has been identified as the most promising solution for removing HABs, with advantages over other methods.
Article
Environmental Sciences
Harshavardhan Mohan, Sethumathavan Vadivel, Se-Won Lee, Jeong-Muk Lim, Nanh Lovanh, Yool-Jin Park, Taeho Shin, Kamala-Kannan Seralathan, Byung-Taek Oh
Summary: The WO3/Zeolite/V2O5 (TZV) composite synthesized through co-precipitation showed excellent degradation efficiency for Bisphenol-A (BpA) compared to bare V2O5. The composite had high crystallinity and no free particles on the zeolite surface. Photocatalytic degradation studies and material analysis demonstrated the high efficiency and stability of the composite, as well as its environmental friendliness.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Harshavardhan Mohan, Sethumathavan Vadivel, Pavithra Muthukumar Sathya, Manabu Fujii, Ga Hyeon Ha, Gitae Kim, Taeho Shin
Summary: Photocatalytic water splitting using nanocomposites of manganese oxynitride and reduced graphene oxide showed enhanced efficiency due to large surface area, increased light absorption, and interfacial charge transfer. The hydrogen evolution rates increased with the content of graphene oxide in the composites, indicating the important role of reduced graphene oxide. The photocatalysts also displayed stability and recyclability after multiple uses.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Harshavardhan Mohan, Sethumathavan Vadivel, Manabu Fujii, Ga Hyeon Ha, Gitae Kim, Hye Rin Lee, Taeho Shin
Summary: In this study, a nanocomposite of PdS nanodisks coupled on self-assembled Nb2O5 superstructures was prepared and shown to be an efficient photocatalyst for water splitting, producing oxygen and hydrogen. Various characterization techniques were used to compare the physical and chemical properties and advantages of the nanocomposite with bare Nb2O5 superstructure and PdS nanoparticles. The synthesized nanocomposite exhibited a hydrogen evolution rate of 665 μmol g(-1) min(-1) and an oxygen evolution rate of 211 μmol g(-1) min(-1), which is twice and three times higher, respectively, than that of Nb2O5 superstructure and PdS nanoparticles. The composite remained structurally intact even after six treatment cycles, indicating its practical applicability.
Article
Biochemistry & Molecular Biology
Santu Shrestha, Kamal Prasad Sapkota, Insup Lee, Md Akherul Islam, Anil Pandey, Narayan Gyawali, Jeasmin Akter, Harshavardhan Mohan, Taeho Shin, Sukmin Jeong, Jae Ryang Hahn
Summary: A facile two-step synthesis method was developed to prepare ternary hetero-composites of ZnO, CuO, and SWCNTs, showing enhanced photocatalytic activity. Among them, ZSC3 exhibited the highest efficiency in degrading methylene blue, Congo red, and Rhodamine B under simulated sunlight.
Article
Environmental Sciences
Harshavardhan Mohan, Ga Hyeon Ha, Gitae Kim, Hye Rin Lee, Hakju Lee, Kyoungsoo Kim, Taeho Shin
Summary: The renewability and zero carbon emissions of hydrogen make it a promising clean energy resource. Photocatalytic water-splitting, despite its low efficiency, has been extensively researched for hydrogen production. In this study, bimetallic transition metal selenides were synthesized and evaluated for their photocatalytic water splitting efficiencies. Among the compounds tested, CMSc exhibited the highest hydrogen evolution rate and also showed great potential in degrading pollutants. Thus, CMSc can be identified as a highly efficient photocatalyst for both environmental and energy applications.
Article
Materials Science, Multidisciplinary
Sethumathavan Vadivel, Bappi Paul, Harshavardhan Mohan
Summary: In this study, a one-dimensional iron oxychloride (FeOCl) needles embedded on the surface of Bi5O7Br squares were successfully synthesized to form a core-shell structured FeOCl/Bi5O7Br heterojunction. Various analytical techniques confirmed the successful formation of core-shell FeOCl/Bi5O7Br nanocrystals. The core-shell structure significantly improved visible light absorption and charge separation efficiency, leading to enhanced photocatalytic degradation of tetracycline under visible light.
Article
Environmental Sciences
Julieta Celeste Martin Tempestti, Harshavardhan Mohan, Pavithra Muthukumar Sathya, Se-Won Lee, Janaki Venkatachalam, Byung-Taek Oh, Kamala-Kannan Seralathan
Summary: In this study, Enterococcus gallinarum (JT-02) was isolated and identified from animal farm waste sludge, showing the ability to biodegrade p-nitrophenol (PNP). The optimal conditions for PNP biodegradation by strain JT-02 were determined through single-factor experiments. It was found that the best setups included PNP concentration of 100 mg/L, pH 7, temperature of 30 degrees C, agitation speed of 150 rpm, and inoculum dose of 3% (v/v). Under these conditions, the bacteria degraded 98.21% of PNP within 4 days. The intermediates produced during PNP biodegradation were identified using High Performance Liquid Chromatography (HPLC) analysis, and the biodegradation pathway was elucidated. Phytotoxicity studies with Vigna radiata seeds confirmed the applicability and efficiency of PNP biodegradation.
ENVIRONMENTAL RESEARCH
(2023)