Article
Engineering, Electrical & Electronic
V. Sanjay, K. M. Rajashekara, Vinayak Pattar, M. V. Murugendrappa
Summary: This study evaluates the electrical and dielectric properties of poly (vinyl alcohol)-tellurium (PVA-Te) nano-composite films. The dispersion and functional groups were characterized using X-ray diffraction and Fourier transmission infrared-attenuated total reflection spectroscopic studies. The surface morphology was studied using scanning electron microscope and high-resolution-transmission electron microscope. These composites show potential applications in microwave and microelectronic industries.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Pasupuleti Vijayalaxmi, Ramya Mandala, Sreelatha Kunchalapalli, B. Suryanarayana, D. Jagadeeswara Rao, Y. Ramakrishna
Summary: In this study, rare earth Ce3+ substituted Cobalt ferrite nanomaterials, CoFe2-xCexO4 (x = 0.0, 0.04, 0.08, and 0.12), were prepared using the sol-gel auto-combustion method. Various techniques including XRD, FESEM, FTIR, DC electrical resistivity, and vibrating sample magnetometer were used to investigate the structural, dc resistivity, and magnetic properties of the samples. The results showed that the prepared samples had a cubic spinel structure without any impurity phase, and the crystallite size decreased with increasing Ce3+ content. The samples exhibited paramagnetic properties, and the DC resistivity decreased with increasing Ce3+ content.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Huma Malik, Muhammad Azhar Khan, Majid Niaz Akhtar, Shagufta Gulbadan, Syeda Rabia Ejaz
Summary: This research synthesized Gd and Co substituted Y-type hexaferrites using the sol-gel auto-combustion method, with XRD analysis showing an increase in crystallite size with increasing Gd-Co content. FTIR spectroscopy revealed absorption bands, while impedance analysis demonstrated changes in AC conductivity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
Rentapalli Vijaya Bharathi, M. K. Raju, P. S. V. Shanmukhi, M. Gnana Kiran, N. Murali, D. Parajuli, Tulu Wegayehu Mammo, K. Samatha
Summary: This study investigated the morphology, structure, DC electrical resistivity, and magnetic characteristics of cobalt-substituted magnesium ferrite materials. The results showed that the materials had a spinel cubic structure with spherical and polyhedral-shaped particles. The activation energy and saturation magnetization increased with higher cobalt concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Y. Shireesha, V. Rajesh, Yenda Srinivasa Rao, Ganimisetti Srinivasa Rao
Summary: Mg0.5Ni0.5Fe2-xCrxO4 (x = 0.0, 0.2, 0.4, and 0.6) ferrites were synthesized using the solid-state reaction route. The synthesized materials' crystal structure, microstructure, crystallite size, magnetic and resistivity properties were measured using XRD, SEM, FT-IR spectroscopy, VSM, and DC electrical resistivity measurements. The results showed that the synthesis was efficient and resulted in improved crystallite sizes in a single-phase cubic spinel structure. The addition of chromium ions resulted in changes in lattice constant, crystallite size, saturation magnetization, remanent magnetization, and coercivity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Rabia Ramzan, Muhammad Tariq, Muhammad Naeem Ashiq, Hind Albalawi, Imtiaz Ahmad, M. H. Alhossainy, Syeda Rabia Ejaz, Rabia Yasmin Khosa, Hafiz Muhammad Tahir Farid, Hasan M. Khan, Tahani Al-Muhimeedh, Abeer A. AlObaid
Summary: The sol-gel technique is used to produce the series of ferrites with the chemical formula BaYyFe2-yO4. X-ray diffraction data shows all samples have a cubic structure. With the increase of yttrium content, lattice parameters and electrical parameters of the samples also increase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
K. Chandramouli, B. Suryanarayana, P. V. S. K. Phanidhar Varma, Vemuri Raghavendra, K. A. Emmanuel, Paulos Taddesse, N. Murali, Tulu Wegayehu Mammo, D. Parajuli
Summary: Complex ferrite nanoparticles were synthesized using sol-gel auto combustion technique. X-ray diffraction (XRD) analysis confirmed a single-phase cubic spinel structure with Fd-3m space group. The samples exhibited semiconductor properties with decreasing DC resistivity as temperature increased. Vibrating sample magnetometer (VSM) was used to characterize magnetic features.
RESULTS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
A. A. Al-Muntaser, Eman Alzahrani, Abdu Saeed, Abdullah F. Al Naim, Hala M. Abo-Dief, Safaa Y. Qusti, A. E. Tarabiah
Summary: This study investigates the impact of titanium oxide (TiO2) nanoparticles (NPs) on the structural, optical, and conductive properties of polystyrene (PS) and polyvinyl carbazole (PVK) nanocomposite films. The synthesized TiO2 NPs have sizes between 12 and 32 nm and a tetragonal anatase phase. The filling of PS/PVK blend with TiO2 NPs decreases the nanocomposite crystallinity, changes the absorption peaks of PS and PVK, and decreases the optical energy gaps. The increase of TiO2 NPs concentration in the blend induces the formation of a percolating network and increases the composite's dielectric loss and constant.
Article
Materials Science, Multidisciplinary
P. V. Prasanna Kumar, B. Suryanarayana, Vijaya Lakshmi Vemula, D. Jagadeeswara Rao, Susmitha Uppugalla, Y. Ramakrishna
Summary: La3+, Sm3+, Nd3+, and Gd3+ substituted Co-Ni system ferrite materials were synthesized using the solid-state reaction method. XRD, SEM, FTIR, DC electrical resistivity, and VSM studies were conducted. The results showed that RE3+ ions substituted Fe3+ ions in the B sites, and the samples exhibited a spinel structure. The lattice parameter of the substituted ferrites increased with the ionic size of the RE ions. SEM analysis indicated that the samples were agglomerated and almost spherical. The FTIR absorption bands confirmed the presence of spinel ferrites. D.C. electrical resistivity and saturation magnetization increased with the substitution of RE3+ ions.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
A. T. Sathyanarayana, Awadhesh Mani
Summary: The study investigated the magnetic, magnetocaloric effect, and resistivity behavior of phase pure MnAs1-xSbx systems synthesized by solid state reaction, with x up to 0.3. The systems display a transition from ferromagnetic metal to paramagnetic insulator, with the transition temperature T-c decreasing systematically with increasing x. The magnetic transition was observed to be first order for all samples, with isothermal magnetization measurements showing similar asymmetric peak behavior for samples in the range of 0.1-0.3 around their respective T-c values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Eman O. Taha, A. M. Ismail, G. M. Nasr, Asmaa S. El-Deeb
Summary: This research investigates the properties of Rochelle salt-doped polyvinyl alcohol composite, including structural, optical, electrical, and mechanical properties. The results show that doping RS changes the crystalline nature of PVA and confirms the interaction and miscibility between PVA and RS. The optical, electrical, and mechanical properties of the RS-doped PVA composites are greatly influenced by the RS concentrations.
Article
Chemistry, Physical
Gui-Cang He, Li-Na Shi, Yi-Lei Hua, Xiao-Li Zhu
Summary: This work investigates the electron-phonon, phonon-phonon, and phonon structure scattering mechanisms and their impact on the thermal and thermoelectric properties of a silver nanowire (AgNW). The study reveals that the electron-phonon scattering rate decreases with increasing temperature, while the phonon-phonon scattering rate increases and surpasses the electron-phonon scattering rate above the Debye temperature. The rate of phonon structure scattering remains constant. The thermal conductivity of the AgNW exhibits an opposite trend to the total phonon scattering rate with temperature. The thermoelectric properties of the AgNW are heavily influenced by the thermal conductivity, and the figure of merit (ZT) of the AgNW is found to be significantly higher than that of bulk silver at room temperature.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Baek-Ju Lee, Yoo-Seong Kim, Dong-Won Seo, Jae-Wook Choi
Summary: The effect of deposition temperature on TiN thin films deposited using thermal atomic layer deposition (ALD) method was investigated in this study. TiCl4 precursor and NH3 reactive gas were utilized, and the study compared the deposition rate, resistivity change, and surface morphology characteristics within a temperature range of 400°C to 600°C. An increase in deposition temperature up to 600°C resulted in a decrease in resistivity to 177 μΩ cm, but also an increase in surface roughness (Rq) to 0.69 nm and a deterioration in step coverage. Post-treatment of the TiN thin film with plasma using a N-2/He gas ratio of 3:2 confirmed a reduction in resistivity of the film deposited at 400°C by approximately 25%.
Article
Materials Science, Ceramics
N. K. Wally, E. Sheha, B. M. Kamal, Atif M. Ali, A. M. Ali, M. M. El-Desoky
Summary: This study examined the dielectric properties of Na2S - V2O5- P2O5 glass with different treatment durations and found that the 12-hour glass-ceramic nanocomposite exhibited the highest conductivity. The activation energies for conductivity and relaxation processes were obtained, and the stretched exponent was estimated to indicate a non-Debye type relaxation process.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Engineering, Electrical & Electronic
Fuad N. Alhabill, Alun S. Vaughan, Thomas Andritsch, Nader Anani
Summary: This study found that the presence of nanofillers affects the resin/hardener stoichiometry and leads to different network structures in the matrix polymer. However, additional effects related to nanofiller loading were observed, beyond the stoichiometric compensation, influencing the electrical behavior of the nanocomposite samples. The potential explanations for this nanoparticle effect include agglomeration, water shells, nanoparticles' influence on matrix dynamics, structure, or polymer interphase free volume content.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2021)
Article
Chemistry, Physical
Sachin R. Rondiya, Yogesh A. Jadhav, Aleksandar Zivkovic, Sagar B. Jathar, Ganesh K. Rahane, Russell W. Cross, Avinash Rokade, Rupesh S. Devan, Sadhu Kolekar, Robert L. Z. Hoye, Hirendra N. Ghosh, Nora H. de Leeuw, Sandesh R. Jadkar, Nelson Y. Dzade
Summary: By substituting Cd into Zn lattice sites, a structural transformation from the kesterite phase to the stannite phase in CZTS nanocrystals was induced, resulting in a reduced bandgap of 1.1 eV and an improved power conversion efficiency of 1.1% for the Cd-substituted solar cell. These results emphasize the significance of substitutional doping strategies in enhancing device characteristics of CZTS-based materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Subhash Chand Yadav, Alfa Sharma, Rupesh S. Devan, Parasharam M. Shirage
Summary: The influence of different counter electrode materials on the performance of TiO2 nanorod-based dye-sensitized solar cells (DSSCs) assembled with hibiscus dye was investigated. Carbon, graphite, and gold as counter electrode materials strongly affected the energy conversion efficiency of DSSCs. The introduction of a compact layer and the use of appropriate counter electrode materials can enhance the performance of the solar cells.
Article
Physics, Multidisciplinary
Kaushal H. Parmar, Vishesh Manjunath, Santosh Bimli, Parameshwar R. Chikate, Ranjit A. Patil, Yuan-Ron Ma, Rupesh S. Devan
Summary: Nickel oxide (NiO) nanostructures were synthesized and deposited on conducting glass substrates by hot-filament metal vapor deposition (HFMVD). The NiO exhibited good electrochromic behavior with high reversibility, short coloration and bleaching times.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Narasimharao Kitchamsetti, Manopriya Samtham, Pravin N. Didwal, Dhirendra Kumar, Diwakar Singh, Santosh Bimli, Parameshwar R. Chikate, Dudekula Althaf Basha, Sunil Kumar, Chan-Jin Park, Sudip Chakraborty, Rupesh S. Devan
Summary: This study reports the effect of morphological transformation from nano particles to ultrathin nanodiscs of MnTiO3 perovskites as an efficient electrode for electrochemical supercapacitors. The ultrathin 2D nanodiscs exhibited higher work-function and delivered better energy storage performance, with excellent capacitance retention after 5000 cycles.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Mohamed Alla, Santosh Bimli, Vishesh Manjunath, Manopriya Samtham, Abhishek Kasaudhan, Ekta Choudhary, Mustapha Rouchdi, Fares Boubker
Summary: In this study, preliminary investigations were conducted on three different perovskite light harvesters using the SCPAS-1D software package, aiming to develop stable and environmentally friendly perovskite materials. By analyzing and optimizing four different electron transport layers, high-performance light harvesters were obtained. The impact of operating temperature on solar cell parameters was also analyzed, and a comprehensive comparison of alternative counter electrodes was provided.
MATERIALS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Subhash C. Yadav, Vishesh Manjunath, Abhishek Srivastava, Rupesh S. Devan, Parasharam M. Shirage
Summary: This article explores a lead-free and stable Cs4CuSb2Cl12 layered double perovskite light absorber and analyzes the impact of different film thickness, defects, and doping densities on the performance of the solar cells. The optimized Cs4CuSb2Cl12 perovskite solar cells show high power conversion efficiencies with and without p-type CuSCN. Furthermore, the article evaluates the influence of operating temperature on the performance of Cs4CuSb2Cl12 perovskite solar cells.
Review
Energy & Fuels
Manopriya Samtham, Diwakar Singh, K. Hareesh, Rupesh S. Devan
Summary: The production of energy using renewable energy sources and its storage is receiving attention due to the depletion of fossil fuels and growing energy demands. Electrochemical capacitors with high specific capacitance, power density, cyclic stability, and fast charging-discharging rates have become important for energy storage. Many researchers have focused on developing one-dimensional nanostructure electrode materials to enhance the energy storage ability of electrochemical capacitors, with conducting polymer nanostructures being highly desirable. However, their low specific capacitance and poor cyclic stability can be overcome by developing conducting polymer-based composites.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Vishesh Manjunath, Yashwanth K. Reddy, Santosh Bimli, Ram Janay Choudhary, Rupesh S. Devan
Summary: By optimizing the thickness, doping density, and defect density of the CBO light absorber, high-efficiency and stable thin film solar cells can be achieved. The SCAPS-1D software was used for simulation and analysis, evaluating the performance and potential application of different PO buffer layers and CBO light absorber.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Vishesh Manjunath, Santosh Bimli, Rathindranath Biswas, Pravin N. Didwal, Krishna K. Haldar, Mangesh Mahajan, Nishad G. Deshpande, Preeti A. Bhobe, Rupesh S. Devan
Summary: This study reports on morphology-controlled NiO electrocatalyst as a single catalyst for both oxygen and hydrogen evolution. The 0D nanoparticles exhibit better overpotential and long-term stability compared to the 2D porous NiO nanoplates due to their larger surface area and active sites.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Rupali Chavan, Nilesh Bhat, Santosh Parit, Kitchamsetti Narasimharao, Rupesh S. Devan, Rahul B. Patil, Vijay C. Karade, Nilesh Pawar, Jin Hyeok Kim, Jyoti P. Jadhav, Ashok D. Chougale
Summary: This work presents a facile green synthesis method for producing Fe3O4 magnetic nanoparticles (MNPs), which exhibit high catalytic activity in Fenton and photo-Fenton reduction reactions. The MNPs show spherical morphology and have an average diameter of 6.3 +/- 1.1 nm. The study demonstrates the superior efficiency of the MNPs in both processes at varied pH ranges. Additionally, the MNPs exhibit good reusability and can effectively reduce dye and Cr(VI) loads in water treatment processes.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Physics, Multidisciplinary
Santosh Bimli, Yashwanth K. Reddy, Vishesh Manjunath, Rupesh S. Devan
Summary: This study presents a highly stable and non-toxic kusachiite CuBi2O4 (CBO) as an excellent light harvester for thin-film photovoltaics. Different oxide heterostructure solar cells (AOHSC) combining CBO absorber with various metal oxides (MOs) were engineered and optimized, showing excellent power conversion efficiency under high acceptor carrier density of CBO absorber.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Analytical
Narasimharao Kitchamsetti, Manopriya Samtham, Diwakar Singh, Ekta Choudhary, Sachin R. Rondiya, Yuan -Ron Ma, Russell W. Cross, Nelson Y. Dzade, Rupesh S. Devan
Summary: Novel hybrid core-shell electrodes consisting of 2D and 1D nanomaterials are developed to address the relatively lower specific energy of supercapacitors. These electrodes, composed of hierarchical 2D MnO2 nanoflakes and 1D NTO mesoporous rods, provide a large surface area and enhanced OH- ions diffusion. The hybrid porous core-shell hetero-architecture of MnO2@NTO delivers high specific capacitance, specific power, and specific energy, with good retention in capacitance after cycling.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Energy & Fuels
Santosh Bimli, Vishesh Manjunath, Sameena R. Mulani, Aayushi Miglani, Onkar S. Game, Rupesh S. Devan
Summary: This study presents a comprehensive analysis of vacancy-ordered Cs2SnI6 perovskite as a light harvester in photovoltaic applications. The device architecture of FTO/ZnO/Cs2SnI6/HTL/Au, with different p-type metal oxides as hole transport layers, is systematically investigated using SCAPS-1D software. The optimized Cs2SnI6-based devices with CuBi2O4, Cu2O, CuAlO2, and NiO HTLs exhibit photoconversion efficiencies of 28.18%, 29.72%, 29.43%, and 29.33%, respectively.
Article
Materials Science, Multidisciplinary
Sameena R. Mulani, Santosh Bimli, Madhuri S. Patil, Umesh A. Kshirsagar, Rupesh S. Devan
Summary: The orthorhombic crystalline walnuts consisting of nanoparticles with an average size of -72 nm of stoichiometric LaFeO3 (LFO) exhibit excellent photocatalytic degradation properties for organic dyes. The LFO walnuts offer 10.280 m2/g surface area and have a band gap of 2.29 eV. Under continuous irradiation for 240 min, the degradation of Crystal Violet (CV), Methylene Blue (MB), and Rhodamine B (RhB) reach 96.02%, 90.22%, and 82.45% respectively, with rate constants of 0.012, 0.0096, and 0.0073 min-1. The LFO walnuts also demonstrate a sunlight driven degradation of -91% for organic CV dye. The study identifies the involvement of h+ and OZ in the photocatalytic degradation process and identifies the degradation intermediates using mass spectrometry.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Vishesh Manjunath, Santosh Bimli, Diwakar Singh, Rathindranath Biswas, Pravin N. Didwal, Krishna Kanta Haldar, Nishad G. Deshpande, Preeti A. Bhobe, Rupesh S. Devan
Summary: The feasibility of 1D porous NiO nanorods as an active electrode for capturing greenhouse CO2, effective supercapacitors, and efficient electrocatalytic water-splitting applications is reported in this study. The nanorods, formed by stacking cubic crystalline NiO nanoparticles with dimensions less than 10 nm, provide the necessary porosity. The NiO nanorods exhibit significant surface area, with a CO2 uptake of 63 mmol g(-1), a specific capacitance of 368 F g(-1), and good retention after 2500 cycles, as well as promising electrocatalytic water splitting performance.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
