Article
Materials Science, Coatings & Films
Muhammad R. Islam, Muhammad G. Azam
Summary: Undoped ZnO and Mg-doped ZnO thin films were synthesized by sol-gel dip-coating technique. The study showed that Mg doping increased the porosity of the films, decreased their crystallinity, and led to the formation of localized energy states. The enhanced photocatalytic efficiency of Mg-doped ZnO thin films was attributed to charge trapping by localized states and an increase in surface area due to porosity induced by Mg doping.
SURFACE ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
S. Zarei, M. Hasheminiasari, S. M. Masoudpanah, J. Javadpour
Summary: ZnO-xSnO(2) composite films were prepared by sol-gel spin coating process and characterized. The films showed distinct microstructure with ZnO pyramids on SnO2 nanoparticles. The ZnO-25 mol% SnO2 film exhibited higher photocatalytic degradation of methylene blue dye compared to pristine ZnO and SnO2 films.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Manh-Cuong Le, Thu-Huong Le, Thanh-Huyen Bui Thi, Quang-Dat Nguyen, Thanh-Ha Do Thi, Minh-Nguyet Tran Thi
Summary: The addition of SiO2 in the TiO2/SiO2 nanocomposite significantly enhances the photocatalytic and antibacterial abilities of the silicate coating, with the best performance observed at a SiO2 content of 15%. This is attributed to the larger surface area provided by TiO2/SiO2 Nc (15%) in the W silicate coating, which increases centers for absorption, photocatalytic reactions, and contact between the sample and bacteria.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Maryam Anwar, Zohra Nazir Kayani, Amna Hassan, Talat Zeeshan, Saira Riaz, Shahzad Naseem
Summary: This study explored the impact of Sm on the photocatalytic and antibacterial properties of ZnO. The results showed that Sm-doped ZnO nanostructures exhibited enhanced crystallite size and demonstrated effective photocatalytic and antibacterial activities. Potential applications of Sm-doped ZnO include sensor development, photovoltaic panels, wastewater treatment, and water-splitting.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Shakoor Ahmad, Muhammad Aadil, Syeda Rabia Ejaz, Muhammad Usman Akhtar, Hadia Noor, Sajjad Haider, Ibrahim A. Alsafari, Ghazala Yasmin
Summary: Industrial pollution has caused water contamination by toxic dyes and pathogenic microbes leading to a need for effective photocatalysis techniques. Researchers have developed a ZnO/SrZnO2 composite as a highly efficient photocatalyst capable of mineralizing dyes and exhibiting antibacterial properties, showing significant potential for water treatment.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hongfei Liu, Chenjun Zhang, Zhiping Zhang, Xiangdong Meng, Xianghua Zeng
Summary: Orthorhombic Sc2Mo3O12 films were successfully prepared via spin coating technique followed by annealing at 500-750 degrees C. The crystallinity of the films improved with higher post-annealing temperatures, demonstrating stable negative thermal expansion properties. The coefficients of thermal expansion in different directions were also determined, showing the overall shrinkage and expansion of the thin film.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Mohamed Belghiti, Lekbira El Mersly, El Mountassir El Mouchtari, Salah Rafqah, Khalid Ouzaouit, Hakim Faqir, Intissar Benzakour, Amane Oueriagli, Abdelkader Outzourhit
Summary: The objective of this study was to investigate the effect of ZnO powder partially coated with a nanometric layer of Y2O3 on the treatment of water contaminated with organic pollutants. The results showed that the partial coating with Y2O3 enhances the photocatalytic activity of ZnO, with almost complete degradation of the sulfamethazine antibiotic under different pH conditions.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
V Deepthi, Anju Sebastian, B. Vidhya
Summary: Sol-gel spin coating method was used to prepare ZnO and ZnO:GO composite films, and the effect of GO incorporation on film morphology and photocatalytic activity was investigated. The results showed that GO was evenly dispersed on the film surface, and the incorporation of GO improved the effectiveness of dye removal.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sabhya, Akshayakumar Kompa, Dhananjaya Kekuda, M. S. Murari, K. Mohan Rao
Summary: This study investigates HfO2 thin films synthesized from various precursor concentrations using sol-gel processed spin coating method. It was found that films with 0.1 M Hf sol-concentration exhibited larger grain size and better crystallinity. Optical studies revealed the transparency of the films in the wavelength range of 300-1100 nm. Surface morphology studies showed low roughness values and fine spherical grains.
Article
Materials Science, Ceramics
M. Narasimha Murthy, V. Ganesh, G. Ravinder, S. Anusha, G. Chandrakala, C. J. Sreelatha
Summary: Aluminum and rubidium-doped zinc oxide thin films were deposited on glass substrates using sol-gel dip coating method. The effect of dopant content on structural, surface morphological, vibrational, and optical properties was studied using X-ray diffraction, SEM-AFM, and Raman spectrometer. It was observed that introducing Rb impurities into the ZnO lattice resulted in a deterioration in crystal quality and a blue shift in the bandgap. The increase in dopant concentration led to a change from hydrophilic to hydrophobic nature and showed significant antibacterial activity against E. coli.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Akshay Surani, Davit Dhruv, Divyarajsinh Zala, D. K. Chudasama, Kush Vachhani, Faizal Mirza, Himanshu Dadhich, P. S. Solanki, N. A. Shah, A. D. Joshi
Summary: In this study, the structural, microstructural, dielectric and impedance properties of low cost Bi0.85La0.15FeO3 thin film grown on FTO glass substrate were investigated. The growth of the film was confirmed by XRD analysis, and surface morphology was examined using scanning probe method. The results showed that the film exhibited complex magnetic field dependent dielectric behavior, indicating the presence of magnetoelectric coupling between spin and lattice.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Xinli Wang, Jin Li
Summary: The development of metal/semiconductor photoactive materials has made significant progress in heterogeneous photocatalysis. Ag/ZQ nanocomposites, especially Ag11/ZQ, showed excellent photocatalytic activity for methylene blue degradation. Various spectroscopy and analysis techniques were used to propose the mechanism behind the enhanced photocatalytic activity of Ag/ZQ nanocomposites.
Article
Chemistry, Physical
Daniela Toplitsch, Jurgen Markus Lackner, Alexander Michael Schwan, Andreas Hinterer, Philipp Stoegmueller, Kerstin Horn, Natalie Fritzlar, Andreas Pfuch, Clemens Kittinger
Summary: The study assessed the antimicrobial activity of a plasma-cured 2.5% (w/v) Cu(NO3)(2)-containing sol-gel surface, showing effective antibacterial properties but impairment under soiling conditions and complete loss after ethanol disinfection. This highlights the need for comprehensive testing based on the anticipated usage of antimicrobial surface coatings.
Article
Chemistry, Multidisciplinary
Mao Tang, Shiji Lu, Lili He, Xiaodong Zhu, Wei Feng, Wanming Zhang
Summary: This study synthesized pure ZnO and ZnTiO3/ZnO composite photocatalysts using zinc acetate and butyl titanate, and found that the ZnTiO3/ZnO composite with a Ti/Zn molar ratio of 0.2 exhibited the highest photocatalytic activity. Exceeding this ratio decreased the photocatalytic performance of the composites.
Article
Optics
Wuttichai Sinornate, Hidenori Mimura, Wisanu Pecharapa
Summary: This investigation focuses on the structural, optical and electrical properties of Sb-doped/undoped ZnO double layer structure annealed in a nitrogen atmosphere. The study reveals that the crystal structure is deteriorated due to Sb incorporation in the ZnO lattice and nitrogen annealing, and the diffraction intensity decreases with different thicknesses of the ZnO film. The presence of Sb atom in the doped ZnO film is confirmed by depth profile measurement. The transmittance spectra show high transparency with interference fringe, and the photoluminescence spectrum exhibits near-band-edge emission of ZnO without any emission in the visible region. The electrical properties demonstrate diode characteristics and photocurrent under dark and UV irradiation, respectively.
Article
Chemistry, Inorganic & Nuclear
R. Thangappan, R. Dhinesh Kumar, R. Jayavel
Summary: Nanofibers with fiber morphology play a key role in enhancing photocatalytic activity under visible light irradiation. MoO3 nanofibers and submicron rods were successfully fabricated, with different diameters obtained at various calcination temperatures. UV-Vis spectroscopy analysis revealed a band gap energy of 3.135 eV for the prepared sample, and the MoO3 nanofibers annealed at 550 degrees C exhibited significant photocatalytic degradation of methylene orange.
JOURNAL OF CLUSTER SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
N. R. Dhineshbabu, B. Raghavendra Babu, S. Arunmetha, M. Arivanandan, R. Jayavel
Summary: The modified Hummer's method was used to prepare reduced graphene oxide (RGO) nanostructures, which were found to have better thermal stability, wettabililty, and UV-screening properties when coated on cotton fabrics.
INORGANIC AND NANO-METAL CHEMISTRY
(2023)
Article
Environmental Sciences
T. Ruby Nirmala Mary, R. Jayavel
Summary: The introduction of Cashew Nut Shell Liquid (CNSL), iron oxide nanoparticles, Plant extracts from Mentha spicata L., Vitex negundo L., and Eucalyptus globulus M., in chitosan biopolymer matrix has created a significant contribution for the development of Bio-formulated polymer composites. The migration test performed for the formulated Bio-composites have satisfactory results with very less amount of residue get migrated that revealed a suitable material for packaging application. The developed bio-formulated polymer composites achieved an excellent biodegradation activity of about 80-93% through the acceleration of soil microbial flora. The SEM and EDAX analysis confirmed the surface degradability variation observed for 5 weeks. The present study is focused on the application of biodegraded soil for promoting the Eggplant growth (Solanum melongena L.) and its eco-efficacy evaluated by enhancing the development of an eco-characteristic active bio-nanomaterials which resulted a positive impact in packaging and agricultural sectors. [GRAPHICS].
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Materials Science, Multidisciplinary
Ankush Chauhan, Ritesh Verma, C. Gopal Krishnan, R. Jayavel, Khalid Mujasam Batoo, Sajjad Hussain, Rajesh Kumar, Pradeep Kumar
Summary: This paper reports the synthesis of lead-free K0.5GdxVy Na0.5-xNb1-yO3 ceramics via solid-state reaction. The study found that co-doping of Gd/V induced phase coexistence and phase formation. The KNN ceramics exhibited enhanced dielectric constant and relaxor behavior.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Environmental Sciences
D. Selvakumar, K. P. Sonu, G. Ramadoss, R. Sivaramakrishnan, R. Jayavel, M. Eswaramoorthy, K. Venkateswara Rao, A. Pugazhendhi
Summary: The n-type Ce doped ZnO (Ce-ZnO) and p-type polyaniline (PANI) heterojunction were successfully synthesized for sensing liquefied petroleum gas (LPG) at standard environment. The Ce-ZnO & PANI nanoparticles were mixed with NMP and coated on a gold coated PET electrode to form a p-n junction. The Ce-ZnO nanoparticles showed improved chemisorbed oxygen and oxygen vacancy after the formation of Ce-ZnO heterojunction. The hollow Ce-ZnO/PANI sensor achieved a maximum response of 80% at 100 ppm LPG concentration.
Article
Biochemistry & Molecular Biology
M. Ramesh, C. Sankar, S. Umamatheswari, J. Balamurugan, R. Jayavel, M. Gowran
Summary: Pure ZnZrO2 and chitosan supported (ZnZrO2/CS) nanocomposite were synthesized via hydrothermal method. The structural and morphological properties of the fabricated nanocomposites were analyzed using various characterization techniques. The ZnZrO2/CS sensor showed wide detection range, high sensitivity, low LOD, and long-term stability for glucose detection in alkaline solution. It also exhibited excellent sensing ability towards hydrogen peroxide with wide dynamic range, high sensitivity, and low LOD. The modified electrode showed excellent anti-interference nature and was successfully used for glucose and H2O2 detection in human blood serum and HeLa cells.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Babu Vimalanathan, J. Judith Vijaya, B. Carmel Jeeva Mary, Ruby Nirmala Mary, Mohamed Km, Ramasamy Jayavel, Rasha A. Abumousa, Mohamed Bououdina
Summary: This study demonstrated the effective reduction of graphene oxide (GO) using thiourea as a reducing and stabilizing agent. The toxicity of thiourea-reduced graphene oxide (T-rGO) on human lung cancer cells was assessed through cell viability, cell cycle analysis, DNA fragmentation, and cell morphology. The results showed that T-rGO exhibited antifungal properties and was more harmful to cancer cells compared to GO, highlighting its potential in biological and biomedical applications.
Article
Chemistry, Multidisciplinary
Venkatachalam Jayaraman, Shanmugam Mahalingam, Shanmugavel Chinnathambi, Ganesh N. Pandian, Aruna Prakasarao, Singaravelu Ganesan, Jayavel Ramasamy, Sivasankaran Ayyaru, Young-Ho Ahn
Summary: HfO2 nanoparticles and HfO2-graphene nanocomposites were synthesized and their structure and optical properties were investigated. The addition of graphene was found to enhance the photocatalytic activity of HfO2-graphene nanocomposites.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
S. Radha, J. Mani, R. Rajkumar, M. Arivanandhan, R. Jayavel, G. Anbalagan
Summary: The structural, optical, morphological, and thermoelectric properties of Zn1-x Cu x Al2O4 (0.0 <= x <= 0.1) samples were investigated. It was found that the energy band gap of ZnAl2O4 decreased and the carrier concentration and mobility increased with the increasing content of Cu. The Zn0.9Cu0.1Al2O4 sample exhibited the highest power factor and zT value.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Chemistry, Inorganic & Nuclear
R. Rajkumar, J. Mani, A. S. Alagar Nedunchezhian, D. Sidharth, S. Radha, M. Arivanandhan, R. Jayavel, G. Anbalagan
Summary: Cu(2-)x SbxTe (0 <= X >= 0.2) samples were prepared using the ball milling method. XRD analysis confirmed the presence of Cu2Te phase in pristine and Cu1.95Sb0.05Te samples, while a secondary phase of Sb2Te3 was observed in other samples along with Cu2Te. SEM and TEM analysis revealed the spherical morphology of the samples. Resistivity (p) of Cu-2-xSbxTe decreased with increasing Sb content up to 0.1 and slightly increased for the sample with X = 0.2. The Seebeck coefficient (S) of Cu-2-xSbxTe decreased with increasing Sb content up to 0.1 and then increased for samples with x = 0.2. Cu1.8Sb0.2Te exhibited a high power factor (682 mu W K(-2)m(-1) @ 623 K), resulting in high S and low p values. The achieved zT value of 0.248 for Cu1.8Sb0.2Te at 623 K was relatively higher than reported values for similar materials.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
N. Sivakumar, P. Vijayakumar, R. Jayavel, Ali Alsalme, Abdullah S. Alsulami, Yuui Yokota
Summary: The pure and strontium substituted LaFeO3 samples were synthesized and characterized with good quality single crystals grown for dielectric and magnetic measurements. The orthorhombic structure and composition of the samples were confirmed by X-ray diffraction and energy dispersive X-ray spectroscopy analysis. The dielectric constant increased in the Sr substituted LaFeO3 crystal and magnetic properties were tested with M-H loop.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Composites
R. Sasikumar, R. Jayavel
Summary: Amine-Multi-walled Carbon Nanotubes (MWCNTs) were spray deposited on fiber fabric to enhance the mechanical and thermal properties of CF/PC composites. The presence of MWCNTs significantly improved tensile strength, modulus, flexural strength, and flexural modulus. However, the impact strength increased only at a higher concentration of MWCNTs. The inclusion of MWCNTs also lowered the glass transition temperature of the composites. Analysis techniques such as XPS, FTIR, and FESEM were used to study the functional groups, dispersion, and adhesion of MWCNTs on the fiber surface.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Chemistry, Analytical
Manoharan Arun Kumar, Ramasamy Jayavel, Shanmugam Mahalingam, Junghwan Kim, Raji Atchudan
Summary: Universal platforms utilizing sensor devices to analyze biomolecules can effectively address diagnostic challenges. Graphene-based field-effect transistors, such as the Graphene Field-Effect Transistor (GFET) devices, are capable of sensing DNA hybridization, pH levels, and protein molecules, making them ideal for biomarker detection.
Article
Chemistry, Multidisciplinary
Kamal Batcha Mohamed Ismail, Manoharan Arun Kumar, Ramasamy Jayavel, Mukannan Arivanandhan, Mohamed Abubakkar Mohamed Ismail
Summary: In this study, pure MoS2 and MoS2/Bi2S3 nanocomposites with different bismuth compositions were synthesized by the hydrothermal method. XRD analysis confirmed the formation of MoS2 and the secondary phase of Bi2S3. SEM, TEM, and HRTEM observations revealed the 3D layered hierarchical structure of MoS2 nanospheres and the nanosheet-like structure of Bi2S3. The electrochemical properties study demonstrated that the MoS2/Bi2S3 composites exhibited improved electrochemical performance and higher specific capacitances compared to pure MoS2, with the 20 mol% Bi added sample showing the maximum specific capacitance of 371 F g(-1) at a current density of 1 A g(-1).
Article
Materials Science, Multidisciplinary
Suguna Subramanian, Sasikala Ganapathy, Sangeetha Dharmalingam, Ramasamy Jayavel
Summary: The graphene oxide nanosheets (GO NSs) and nickel titanate nanofibres (NiTiO3 NFs) were synthesized using modified Hummers and electrospinning techniques. Different weight percentages of GO NSs were decorated on the surface of NiTiO3 NFs through sonication. Scanning electron microscopy and high-resolution transmission electron microscopy confirmed the decoration of GO NSs on the surface of NiTiO3 NFs. The inclusion of GO improved the absorption capability of NFs and effectively hindered the recombination of photoexcited charge carriers, as revealed by photoelectrochemical studies. Photocatalytic activity was observed with the degradation of methylene blue (MB) dye solution. The GO NSs-decorated NiTiO3 NF composite showed significantly improved photocatalytic activity compared to pure NiTiO3 NFs.
BULLETIN OF MATERIALS SCIENCE
(2023)
