Article
Chemistry, Physical
Mahsa Khoshnam, Hamidreza Salimijazi
Summary: In this study, a novel magnetic-photocatalytic core/double-layer-shell of Fe3O4/SiO2/a-Fe2O3 particles was synthesized via a developed sol-gel method, with each stage characterized using XRD, FTIR, and VSM. The particles exhibited an average size of 250 nm and showed high photo-degradation efficiency towards dye contaminations in a short period of time.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Babak Kakavandi, Emad Dehghanifard, Pari Gholami, Mohammad Noorisepehr, Bahareh MirzaHedayat
Summary: The degradation of metronidazole (MNZ) antibiotic by photocatalytic activation of peroxydisulfate (PDS) using Fe3O4/SiO2/TiO2@rGO nanocomposite as a recoverable heterogeneous catalyst showed high efficiency, with over 94% MNZ and 58% TOC removed within 60 minutes under optimum conditions. The nanocomposite demonstrated potential for high reusability after four cycles of reuse.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
A. Dutta, B. Pihuleac, Y. Chen, C. Zong, L. Dal Negro, C. Yang
Summary: The use of CSS plasmonic nanoparticles has shown significant enhancement in the photocatalytic performance of PEC photoanodes using hematite as a testing system. The optimized CSS NPs have demonstrated double resonance peaks and spatially uniform electric field distributions, resulting in improved photocurrent density and potential for increasing carrier generation in hematite photoelectrocatalytic systems.
MATERIALS TODAY ENERGY
(2021)
Article
Engineering, Chemical
K. P. O. Mahesh, Zi Qin Zhao, Hsiao Yang Liu, Kuan-Ting Lai, Eddie Hsiang-Hua Lai, Hong-Ping Lin, Yu-Chih Chiang
Summary: The study found that using SiO2/MgO/Fe2O3 photocatalyst and low concentration of H2O2 under UVA1 light can effectively degrade dyes and stains, achieving satisfactory teeth whitening without significant impact on the enamel surface. This can be considered as a safe and efficient method for dental bleaching.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Physical
Zhenjun Wang, Quanming Zhao
Summary: Narrow absorption band width is a common problem faced by current electromagnetic wave absorbing materials. Herein, a coreshell FeCo@SiO2@NiFe2O4 composite was prepared to solve this problem. The effects of calcination temperature on the structure, magnetic properties and wave absorption properties of the composite were investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Environmental Sciences
M. C. Shibu, M. D. Benoy, S. Shanavas, Mohammad Abu Haija, J. Duraimurugan, G. Suresh Kumar, Tansir Ahamad, P. Maadeswaran, Quyet Van Le
Summary: Phase pure α-Fe2O3 and α-Fe2O3/rGO nanostructures were successfully synthesized using a hydrothermal technique, exhibiting enhanced visible-light activity and mesoporous property.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Honghong Fu, Yue Guo, Jian Yu, Zhen Shen, Jie Zhao, Yu Xie, Yun Ling, Sheng Ouyang, Shiqi Li, Wei Zhang
Summary: This study investigated the relationship between shell thickness and microwave absorption performance in core-shell nanoparticles. The findings showed that the sample with an optimal shell thickness achieved the strongest microwave absorption ability. This research provides important insights for designing next-generation advanced iron oxide-based materials for microwave absorption.
CHINESE CHEMICAL LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Ji Hun Jung, Gye Seok An
Summary: This study investigates a method for synthesizing gamma-Fe2O3@SiO2 nanoparticles using sodium silicate (Na2SiO3) as a precursor. A surface treatment involving an acid or base is utilized to prepare activation sites for grafting the SiO2 network onto the magnetic particles. The effects of pH on the surface charge and coating layer thickness of the nanoparticles are analyzed, and the optimal pH is determined. The resulting nanoparticles exhibit improved dispersibility and are evaluated for DNA purification. Residual Na ions on the particle surface can reduce the purification efficiency, so additional acid treatment is performed to remove them. The correlation between surface charge and interparticle forces is examined, and it is found that the purification efficiency improves as the zeta potential and particle size distribution increase. In conclusion, gamma-Fe2O3@Na2SiO3 nanoparticles are successfully fabricated using Na2SiO3 and additional acid treatment, providing a promising alternative method for synthesizing gamma-Fe2O3@SiO2 nanoparticles with improved dispersibility and purification efficiency.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rana Ismael Faeq, Safanah Sahib Jaafar, Amel Muhson Naji, Mustafa K. A. Mohammed, Olfat A. Nief
Summary: To enhance the photocatalytic performance of rGO/PVA, ZnO nanoparticles were incorporated into the structure, forming a triple rGO/PVA/ZnO nanocomposite. XRD, FTIR, FESEM, Raman, TEM, and UV-Vis measurements were employed to analyze the synthesized materials. The results showed that rGO/PVA/ZnO had a homogeneous structure with pores and exhibited high photocatalytic performance for decomposing methylene blue under artificial sunlight illumination.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Yimin Pan, Zhongcheng Huang, Dandan Zheng, Can Yang
Summary: Hydrogen sulfide (H2S), a broad-spectrum toxicant, poses serious health and climate change impacts, necessitating effective addressing. Photocatalysis offers a viable solution for reducing H2S to sulfur. A novel composite photocatalyst with a sandwich structure, consisting of internally immobilized SiO2 nanospheres and externally wrapped COF layers co-modified with iron oxide nanoparticles, exhibits high H2S reduction efficiency and stability. Characterization and analysis confirm the enhanced efficiency through S-type heterojunctions in increasing photo-generated carrier separation. This research advances knowledge on photocatalytic H2S reduction and provides a novel approach for catalysts in COF sandwich core-shell structures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Energy & Fuels
Longge Li, Yajie Chen, Xiu Liu, Qi Wang, Lizhi Du, Xi Chen, Guohui Tian
Summary: Rational component control and architectural design were employed to fabricate α-Fe2O3/SnS2 nanostructures with enhanced photoelectrochemical performance. The optimized photoanode exhibited accelerated charge separation and increased active sites, leading to improved PEC performance. Decorating with Cu2O nanoparticles further enhanced water splitting performance and incident photon to current efficiency.
Article
Materials Science, Multidisciplinary
Muthuraj Arunpandian, Karuppaiah Selvakumar, E. R. Nagarajan, Tae Hwan Oh
Summary: MnO2/NiO@rGO nanocomposites were synthesized for the degradation of dyes and as supercapacitors. The nanocomposites exhibited high degradation efficiency for Methylene blue, Congo red, and Methyl orange dyes during the photodegradation process. In addition, they showed high capacitance values and retained their electrochemical properties in long-term applications.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Changhao Li, Zishuo Wang, Liyue Wang, Qiang Bai, Baoxiang Wang, Chuncheng Hao
Summary: In this study, TiOF2@SiO2 cubic-like core/shell nanoparticles were prepared using a simple two-step method. The coating of SiO2 was found to decrease the leaking electric current density and increase the shear stress, making the special cubic-like core/shell nanoparticles a promising electroresponsive material.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Marie-Charlotte Horny, Jean Gamby, Vincent Dupuis, Jean-Michel Siaugue
Summary: Magnetic hyperthermia on core-shell nanoparticles has shown promising advancements in biomedical applications, allowing for the release of DNA targets to mimic specific biological molecules. Silica-coated magnetic nanoparticles demonstrate efficient heating capabilities while maintaining low solution temperatures, making them suitable for biological media and energy efficiency.
Article
Materials Science, Multidisciplinary
Susan Samadi, Mahsa Nouroozshad, Seyed Amirabbas Zakaria
Summary: The research utilized the Staudenmaier method to synthesize reduced graphene oxide for the ZnO@SiO2/rGO nanocomposite preparation. The analysis through SEM, EDS, XRD, FT-IR, and TEM confirmed the structure of the fabricated nanocomposite and its potential application as a gas sensor.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Kasimayan Uma, Shin-Wen Chen, Balu KrishnaKumar, Chellappa Jeyaprabha, Thomas C. -K. Yang, Ja-Hon Lin
Summary: The CdS nanostar decorated SiO2/TiO2-ST spheres showed enhanced photocatalytic activity under visible light irradiation compared to the SiO2-CdS spheres, attributed to providing more active sites for dye adsorption and reducing electron-hole recombination.
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
Nanoscience & Nanotechnology
Chandra Mohan Singaravelu, Xavier Deschanels, Cyrielle Rey, Jeremy Causse
Summary: This article explores the impact of nitrogen speciation, graphitization, and surface functionality on the structure-optical property relationship of carbon dots (CDs) in solution and solid-state. By utilizing a simple synthesis method with citric acid and m-phenylenediamine, distinctive N-doped CDs were synthesized, revealing amphiphilic and solid-state yellow luminescent CDs. The research also delved into the photoluminescence mechanism and structure of CDs, while developing fluorescent strips as a sensor for detecting toxic metal ions.
ACS APPLIED NANO MATERIALS
(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
Amreetha Seetharaman, Manikandan Kandasamy, S. Manivannan, Kandasamy Jothivenkatachalam, Kaipannan Subramani, Alagarsamy Pandikumar, Marappan Sathish, Venugopal Rao Soma, Dhanuskodi Sivasubramanian, Brahmananda Chakraborty
Summary: TiO2/rGO electrode materials synthesized via hydrothermal method demonstrate excellent performance, with high specific capacitance and cyclic stability, making them suitable for energy storage devices.
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
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
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
Chemistry, Multidisciplinary
Lung-Chien Chen, Sih-An Chen, Kasimayan Uma, Chih-Hsun Chiang, Jia-Xun Xie, Zong-Liang Tseng, Shun-Wei Liu
Summary: This study utilizes perovskite quantum dots (PQDs) as emissive materials to enhance the performance of upconversion devices (UCDs). By optimizing the device structure and the materials involved, high luminance, current gains, photon-to-photon conversion efficiency, and low turn-on voltage were achieved.
ADVANCED FUNCTIONAL 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
Materials Science, Multidisciplinary
I-Sheng Hsu, Chih-Chien Lee, Abdul Khalik Akbar, Kasimayan Uma, Shun-Wei Liu
Summary: Transparent photovoltaics (TPVs) have potential applications in see-through surfaces, but the limitations of existing TPV technologies have hindered their widespread implementation. In this study, a durable and cost-effective approach utilizing an air-cooling nanosecond laser processing system is proposed to enhance the performance of non-fullerene materials in organic photovoltaic systems. By controlling the optical transmission properties through hexagonal width processing and depositing a tungsten oxide buffer layer, a high average visible transmittance (AVT > 65%) is achieved with no color deviation. This treatment expands the applicability of TPVs and could lead to commercialization in the renewable energy market.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
