Article
Chemistry, Physical
Masoud Emami Mehr, Hossein Maleki-Ghaleh, Mohadeseh Yarahmadi, Majid Kavanlouei, M. Hossein Siadati
Summary: In this study, core/shell ZnO/TiO2 nanocomposite samples were prepared using the sol-gel method at different time spans. The sample prepared in the 15-minute time span (ZnTi15) exhibited the highest photocatalytic activity and charge carrier density, making it the optimal sample. The formation of a heterojunction at the ZnO/TiO2 interface could be attributed to the increased photocurrent density observed for the ZnTi15 sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Salih Alper Akalin, Mustafa Erol, Begum Uzunbayir, Sibel Oguzlar, Serdar Yildirim
Summary: NiOx, Li:NiOx, and Li,Mg:NiOx powders were produced by sol-gel method, and their structural and optical properties were studied. XPS results confirmed the successful incorporation of Li+ and Mg2+ into NiOx structure, with decreased crystallite size as dopant concentration increased. Addition of Li+ and Mg2+ led to reduced emission intensity and average decay time compared to pristine NiOx.
Article
Materials Science, Ceramics
I. A. Mkhalid
Summary: In this study, a sol-gel-based process was used to prepare Ag2O/SrAl2O4/CNT ternary nanocomposites, which exhibited visible-light response and enhanced photocharge mobility. The 3.0 wt% Ag2O/SrAl2O4/4.0% CNT photocatapyst showed improved performance in hydrogen evolution, attributed to the precise amounts of Ag2O and CNTs added.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Ganeshraja Ayyakannu Sundaram, Kalidass Namasivayam, Lavanya Ramesh, Siva Padma Devi Sadhasivam
Summary: The study investigates the synthesis and analysis of an innovative composite material formed by grafting single-site octahedral iron(III) oxide complex onto graphene oxide. The composite demonstrates enhanced photoactive properties and exceptional photocatalytic performance, surpassing existing commercially available counterparts. This research opens a viable path towards the development of economically sustainable photocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Lylia Amirache, Fatiha Barka-Bouaifel, Priyakshree Borthakur, Manash R. Das, Hania Ahouari, Alexandre Barras, Baghdad Ouddane, Sabine Szunerits, Rabah Boukherroub
Summary: The study prepared a cobalt sulfide-reduced graphene oxide nanocomposite and achieved rapid elimination of organic pollutants in water at room temperature. Various operating parameters were systematically studied for their effects on degradation efficiency, revealing the significant role of sulfate radicals in the catalytic process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Inorganic & Nuclear
Saleh D. Mekkey, Mohamed E. Sultan, Mohamed M. Elsenety, Ahmed Helal, Badr A. Elsayed
Summary: In this study, nanostructured CoAl2-xLaxO4 photocatalysts were synthesized and their photocatalytic activity was studied for the degradation of dye. The doping of La3+ ion was found to enhance the photocatalytic activity, and the mechanism of the photocatalytic process was determined.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
P. Nivetha, B. Kavitha, M. Kalanithi
Summary: BaWO4-MoS2 nanocomposites synthesized by co-precipitation method exhibit excellent photocatalytic activity and antimicrobial properties, showing high efficiency in dye removal and potential environmental applications.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Chemistry, Physical
Fang Liang, Miao Lu, Yu-Hang Zhang, Qi Shi, Fa-Nian Shi
Summary: A novel BiCo-based bimetal coordination polymer, BiCo-MCP, was synthesized and characterized for its structure and photocatalytic performance, revealing that the highest degradation efficiency of imidacloprid pesticide can be achieved under specific pH and H2O2 concentration.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Engineering, Chemical
Sivakumar Vigneshwaran, Chang Min Park, Sankaran Meenakshi
Summary: A novel hybrid photocatalyst NCS@MX was synthesized using a two-step hydrothermal treatment, showing high catalytic activity in degrading RhB under visible light irradiation. The use of NCS@MX increased the separation efficiency of photoinduced e and h+ through optical response and recombination rate, leading to enhanced photocatalytic degradation of RhB.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
T. S. Kanchana, T. Sivakumar, P. Venkateswari
Summary: In this study, ZnS/CdS/ZnCdS catalysts were synthesized to improve the dye degradation under visible-light irradiation. The ZnCdS nanocatalyst exhibited superior catalytic efficiency with improved crystalline structure, surface area, band gap, and photo stability.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Kuilin Lv, Detian Wan, Dezhi Zheng, Yushan Qin, Yuguang Lv
Summary: In this study, different amounts of polypyrrole modified BiVO4 photocatalyst were synthesized, and the optimal doping amount of 5% showed the highest photocatalytic activity. The mechanism of enhanced activity was discussed, with photogenerated holes transferring to the pi orbital of PPy and electrons transferring to the conduction band of BiVO4 for effective charge separation and stabilization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
T. S. Kanchana, T. Sivakumar, P. Venkateswari
Summary: The development of high-performance photocatalysts with broad visible-light adsorption, photo-electrochemical stability, and superior charge separation efficiency has gained significant attention for clean renewable energy applications. In this study, CuS-encapsulated ZnCdS nanopellets were prepared using a simple sol-gel method, and their enhanced photocatalytic activity for dye degradation was observed under visible-light irradiation.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Sherief A. Al Kiey, Alaa A. Sery, Hala K. Farag
Summary: In this paper, the sol-gel synthesis of cobalt oxide in four different ionic liquids with two different cations and anions was reported. The results showed that the shape and size of the synthesized Co3O4 nanoparticles were influenced by the type of the employed ionic liquid, with smaller particles observed in the imidazolium-based ionic liquids compared to the pyrrolidinium-based ionic liquids.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Maxime Royon, Francis Vocanson, Damien Jamon, Francois Royer, Emmanuel Marin, Adriana Morana, Cosimo Campanella, Aziz Boukenter, Youcef Ouerdane, Yves Jourlin, Sylvain Girard
Summary: The study demonstrates that the Rhodamine 6G-doped TiO2-SiO2 sol-gel films can maintain strong photoluminescence signals even after exposure to gamma-rays. Additionally, the refractive index decreases with increasing dose, and chemical changes indicate a photo-induced polymerization process, suggesting potential applications of the material in radiation-rich environments for sensing purposes.
Article
Engineering, Chemical
Siamak Dolatabadi, Moslem Fattahi, Mohammad Nabati
Summary: TiO2/ZnO nanostructures were synthesized by different methods to degrade Rhodamine B, and the key parameters affecting the catalyst performance were investigated. The catalyst was characterized, and optimal conditions for photocatalytic degradation were determined through experiments, resulting in excellent degradation performance.
DESALINATION AND WATER TREATMENT
(2021)
Article
Physics, Condensed Matter
John Abel Martin Mark, Archana Venkatachalam, A. Pramothkumar, N. Senthilkumar, K. Jothivenkatachalam, Joseph Prince Jesuraj
Summary: Tetragonal spinel Cobalt manganite nanoparticles were successfully prepared via co-precipitation route, with crystal structure and phase purity confirmed by PXRD and optical band gap measured at 1.70 and 2.0 eV. Morphological analysis was conducted using SEM images, with elemental composition determined by EDX spectrum. FTIR and PL spectrum provided information on functional groups and crystal defects, while magnetic properties were analyzed with VSM. Photocatalytic activity against organic dyes under direct sunlight showed degradation efficiencies of 87.80%, 79.43%, and 52.78% for MG, MB, and CR dyes respectively.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Engineering, Chemical
Kasimayan Uma, Chandra Mohan Singaravelu, Veerappan Kavinkumar, Kandasamy Jothivenkatachalam, Ja-Hon Lin
Summary: A PT/In heterostructured nanocomposite was fabricated and found to be an excellent photocatalyst for degrading Acid Blue dye under UV-Visible light illumination. The enhanced photocatalytic performance is attributed to the synergistic effect of the heterojunction between TiO2 and In2O3, as well as a reduction in the recombination rate, with high stability demonstrated even after five consecutive cycles.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Physical
Veerappan Kavinkumar, Atul Verma, Kasimayan Uma, Subramanian Moscow, Kandasamy Jothivenkatachalam, Yen-Pei Fu
Summary: The synthesized plasmonic metal-induced Bi2WO6/TiO2 ternary composite exhibited excellent catalytic activity for Rhodamine B photodegradation, high current density for oxygen and hydrogen evolution reactions, and better electrocatalytic activity for dopamine detection due to the synergistic effects of noble metal incorporation into the semiconductor. Additionally, the composite showed antibacterial potential against Escherichia coli, showcasing promising prospects for photocatalytic, electrochemical, sensing, and antibacterial applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
C. Ravi Dhas, S. Esther Santhoshi Monica, K. Jothivenkatachalam, A. Joseph Nathanael, V. Kavinkumar, R. Venkatesh, D. Arivukarasan
Summary: The study introduces nickel-copper oxide nanocomposite films as bifunctional electrocatalysts for water splitting, prepared using jet nebulizer spray pyrolysis technique. The synergistic effect between CuO and NiO was found to significantly enhance the performance of the electrocatalyst.
Article
Chemistry, Inorganic & Nuclear
A. Pandiaraj, M. Mohmed Ibrahim, K. Jothivenkatachalam, V. Kavinkumar
Summary: This study focuses on the synthesis of structure-based BiVO4 nanoparticles using the hydrothermal method. The material was characterized using various techniques and showed potential for photoelectrochemical applications.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Chemistry, Physical
Durai Murugan Kandhasamy, Jothivenkatachalam Kandasamy, Sekar Chinnathambi, Magda H. Abdellattif
Summary: The excited-state dynamics of fluorescent probes attached to polymer segments provide insights into the internal dynamics and interior polarity of both synthetic and natural polymers under un-entangled conditions. In this study, the femtosecond dynamics of a well-known molecular probe, proflavine cation, were investigated to uncover the structural dynamics of polymethacrylic acid. The experimental results revealed that the pH of the solution affects the reorientation of water molecules and solvent reorganization processes.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Electrochemistry
S. Esther Santhoshi Monica, C. Ravi Dhas, R. Venkatesh, R. Sivakumar, R. Vignesh, V. Anslin Ferby
Summary: In this study, the synergetic effect of NiO and MnOx on electrochromic behavior was analyzed for the first time. Ni-Mn mixed metal oxide nanocomposite films were deposited on glass and FTO substrates with varying Mn/Ni ratio from 0 to 1 using a simple jet nebulizer spray pyrolysis technique. The films were characterized using various techniques and it was observed that the incorporation of Mn in NiO resulted in structural and electronic band structure changes. The electrochromic performance of the prepared films was studied and it was found that the synergy between the oxides of Ni and Mn had a significant influence on switching kinetics, reversibility, optical contrast, and coloration efficiency.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Subramanian Moscow, Veerappan Kavinkumar, Masilamani Sriramkumar, S. Prabath Reshmi Kalaikathir, Kandasamy Jothivenkatachalam, Yen-Pei Fu, Srinivasan Anandan
Summary: In this study, a facile microwave route was used to synthesize Tin (Sn) and Zirconium (Zr) doped BiVO4 nanomaterials, which exhibited enhanced photocatalytic and photoelectrochemical performance. Various characterization techniques were employed to evaluate the impact of metal doping on the crystal structure, optical properties, electrical properties, and photocatalytic activity. The results showed that metal doping effectively created heterostructured nanomaterials, reducing recombination processes and improving the overall performance.
Article
Chemistry, Physical
Manikandan Kandasamy, Amreetha Seetharaman, Inbamani Manohara Babu, J. Johnson William, Gopalan Muralidharan, Dhanuskodi Sivasubramanian, Kandasamy Jothivenkatachalam, Muhammad Imran, Brahmananda Chakraborty
Summary: In this study, a ternary hybrid of multiwalled carbon nanotubes/SnO2/polyaniline (MSP) was synthesized for energy storage application. Various characterization studies confirmed the formation of the ternary hybrid, which exhibited excellent electrochemical performance.
SURFACES AND INTERFACES
(2022)
Article
Environmental Sciences
Subramanian Moscow, Veerappan Kavinkumar, Masilamani Sriramkumar, Kandasamy Jothivenkatachalam, Panchamoorthy Saravanan, Natarajan Rajamohan, Yasser Vasseghian, Manivasagan Rajasimman
Summary: An efficient BiVO4 nanocatalyst doped with Erbium (Er) and Yttrium (Y) was synthesized using a microwave irradiation method. This catalyst showed improved photoelectrochemical water splitting and photocatalytic performance compared to bare BiVO4. The study demonstrated the potential of crystal modification using rare earth metals for hydrogen energy production and photocatalytic degradation of organic pollutants.
Article
Materials Science, Multidisciplinary
K. C. Mercy Gnana Malar, M. B. Arthina Titlin, R. Venkatesh, S. Keerthana, C. Ravi Dhas
Summary: The structural, optical, photocatalytic, and antimicrobial properties of transition metal-doped CuO nanostructures were thoroughly investigated. It was found that the incorporation of transition metals significantly influenced the properties of CuO nanoparticles.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Veerappan Kavinkumar, Atul Verma, Kandasamy Jothivenkatachalam, Yen-Pei Fu
Summary: This study presents a microwave-assisted synthesis method to develop CuO-decorated Bi3.84W0.16O6.24/Bi2WO6 dual-functional nanohybrids for electrochemical hydrogen evolution reaction (HER) and photocatalytic Cr(VI) reduction applications. The CuO1.0/biphase-BW catalyst exhibits excellent HER activity in neutral media with a low overpotential and Tafel slope. The CuO1.0/biphase-BW catalyst-coated carbon cloth also demonstrates good conductivity and electrochemical stability. The tremendous activity of the synthesized catalyst is attributed to the formation and electronic interaction of CuO with biphase Bi3.84W0.16O6.24/Bi2WO6, increasing surface-active sites and charge transfer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
P. Senthilkumar, S. Raja, R. Ramesh Babu, V. Kavinkumar, K. Jothivenkatachalam, G. Vasuki
Summary: In this study, undoped and SnO2:Cr-doped thin films were prepared by a homemade spray pyrolysis method and their characteristics were investigated. The results showed that Cr-doping can reduce the crystallite size and grain size of SnO2, and improve the photocatalytic performance.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
C. Ravi Dhas, S. Esther Santhoshi Monica, R. Venkatesh, R. Sivakumar, A. Joseph Nathanael, R. Vignesh, D. Arivukarasan, K. C. Mercy Gnana Malar, S. Keerthana
Summary: In this study, Nickel Oxide (NiO) thin films were deposited over glass and FTO substrates using nebulizer spray pyrolysis technique. The influence of different annealing temperatures on film stoichiometry and its subsequent effect on physical and electrochromic properties were investigated. XRD, XPS, HR-SEM, EDS and AFM were used to analyze the structural information, chemical state, and morphological properties of the deposited films. UV-Vis spectroscopic analysis revealed the variation of optical parameters associated with defects in NiO. Electrochromic performance of the films was evaluated using various electrochemical measurements, and enhanced electrochromic behavior was observed in NiO films with higher concentration of Ni3+ ions.
INORGANIC AND NANO-METAL CHEMISTRY
(2023)