Article
Chemistry, Physical
Muhammad Ali Ehsan, Zaka Ullah, Muhammad Faizan Nazar, Muhammad Younas, Munzir Suliman
Summary: In this work, nanostructured nickel thin films deposited on porous nickel foam substrate were studied for improved oxygen evolution reaction (OER) catalysis. The Ni@NF electrocatalyst showed outstanding OER properties, such as minimum overpotential and high current density. The impressive performance of the catalyst is attributed to the synergic effect generated between nanostructured-Ni and porous NF substrate, enhancing the electrical conductivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Sachin S. Pujari, Vinod V. Patil, Akash S. Patil, Vinayak G. Parale, Hyung-Ho Park, Jayavant L. Gunjakar, Chandrakant D. Lokhande, Umakant M. Patil
Summary: Amorphous, hydrous nickel phosphate thin films prepared using SILAR method exhibit superior specific capacitance, excellent capacitive retention, and coulombic efficiency in electrochemical study. A hybrid supercapacitor device utilizing the nickel phosphate as cathode and reduced graphene oxide as anode demonstrates high specific capacitance, energy density, and cyclic stability.
Article
Chemistry, Physical
Dmitry S. Dmitriev, Maksim I. Tenevich, Vadim I. Popkov
Summary: The synthesis and research of nickel and nickel-copper coatings on carbon felt from ammonium-sulfosalicylic electrolytes as electrocatalysts of water splitting reactions were carried out. The effect of copper concentration on electrochemical behavior was studied in the range of 5-15 g/L. The materials were investigated using SEM, XRD, EDX, and electrochemical methods. The obtained materials have improved performance in the evolution reactions of hydrogen (HER) and oxygen (OER), with overpotentials needed for a nominal current density of 10 mAcm-2. The stability test demonstrates that the overall water splitting occurs at certain voltages, while impedance analysis indicates changes in resistance for synthesized samples.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Supriya J. Marje, Vinod V. Patil, Vinayak G. Parale, Hyung-Ho Park, Pragati A. Shinde, Jayavant L. Gunjakar, Chandrakant D. Lokhande, Umakant M. Patil
Summary: A rational combination of metal cations is necessary for improved electrochemical energy storage performance of bimetal compounds. Adjusting the ratio of nickel and cobalt can enhance the physicochemical properties and electrochemical capacitive performances of nickel cobalt phosphate materials. The synergy between nickel and cobalt species in the thin film electrodes contributes to the excellent electrochemical capacitive performance of hybrid asymmetric devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Liqi Li, Wenjian Shen, Chenquan Yang, Yuxi Dou, Xuehao Zhu, Yao Dong, Juan Zhao, Junyan Xiao, Fuzhi Huang, Yi-Bing Cheng, Jie Zhong
Summary: The study presents a convenient and scalable solution route, chemical bath deposition (CBD), for fabricating efficient hole transport layer, planar NiOx film, for inverted perovskite solar cells (IPSCs). The CBD process allows adjustment of the film properties by varying the cation concentration, resulting in enhanced charge transport efficiency and improved efficiency of the solar cells from 16.14% to 18.17%.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
S. Nivetha, S. Prabahar, R. T. Karunakaran, M. Narendhera Ganth, Dhinesh Subramanian, Adel El-marhhany, Sangaraju Sambasivam, Fen Ran
Summary: In this study, ferrous nickel pyrophosphate (Fe2Ni2P2O7) thin films were successfully prepared via chemical bath deposition and their electrochemical performance was investigated. The films exhibited improved crystallinity and good charge transfer at the electrode/electrolyte interface, resulting in high specific capacitance and good cycle stability. These findings suggest the promising potential of Fe2Ni2P2O7 in energy storage applications.
Article
Electrochemistry
Satyajeet S. Patil, Pramod S. Patil
Summary: Hydrothermal technique was used to prepare nickel phosphate hydrate (NPH) and nickel pyrophosphate (NPP) electrodes on 3D Ni-foam. The microstructures of NPH and NPP electrodes changed with hydrothermal reaction duration. XRD, FTIR, and FT-Raman confirm the crystalline and amorphous nature of NPH and NPP materials. SEM investigation reveals plate-like microstructures of the electrodes. Electrochemical measurements show that the NPP electrode has a specific capacity of 1866.66 mu Ah/cm2 and a capacity retention of 98.30% after 5000 cycles.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
J. S. Shaikh, M. Rittiruam, T. Saelee, V. Marquez, N. S. Shaikh, J. S. Santos, P. Kanjanaboos, M. K. Nazeeruddin, S. Praserthdam, P. Praserthdam
Summary: The study investigates Ru-doped hydrous cobalt phosphate as a catalyst for oxygen evolution reaction, achieving good electrocatalytic performance through optimizing nanostructures, showing potential for practical applications.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Z. Makhdoumi Kakhaki, A. A. Youzbashi, P. Sangpour, N. Naderi, Y. Orooji
Summary: A comparative study on the photodetection properties of CdS thin films deposited at different cadmium chloride concentrations revealed that the increased cadmium salt concentration led to changes in crystal phase, film thickness, and photosensitivity. The photosensitivity strongly depends on factors such as film thickness, quantum confinement effect, and sulfur vacancy amount in samples grown via the CBD method.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Kim Hyon Chol, Choe Hyon Ho, Kim Yong Jo, Son Gwang Il
Summary: CdS thin films were deposited by CBD method for CdTe solar cells without stirring, and the influences of deposition parameters on film properties and solar cell performances were studied. The optimal parameters were determined to be reactant concentration of CdCl2: 1 mM, (NH2)2CS: 6 mM, NH4Cl: 20 mM, NH3H2O: 1 M, PH: 10.5, bath temperature: 85 degrees C, deposition time: 1 h, leading to improved performance of the solar cells.
Article
Chemistry, Analytical
Lili Xiao, Kaixiu Yang, Jiaxing Duan, SiYan Zheng, Jin Jiang
Summary: Spherical Ni-based metal-organic frameworks (Ni-MOFs) were used as precursors to prepare nanorod-like nickel phosphate (r-NiPO) with enhanced electro-catalytic properties for glucose detection. The addition of nickel ion affected the construction of nickel phosphate with different structures. The r-NiPO showed a porous, interconnected structure and abundant active Ni(II)/Ni(III) pairs, facilitating glucose oxidation. Compared to Ni-MOF, r-NiPO exhibited superior electrocatalytic properties due to the exposure of more active Ni sites. The r-NiPO modified electrode showed a linear response to glucose and high sensitivity, suitable for glucose detection in human serum.
Article
Engineering, Electrical & Electronic
C. Doroody, K. S. Rahman, H. N. Rosly, M. N. Harif, M. Isah, Y. B. Kar, S. K. Tiong, N. Amin
Summary: This study explores the characteristics of cadmium sulfide (CdS) thin films grown on ultra-thin glass substrates through RF magnetron sputtering and chemical bath deposition (CBD). The XRD analysis reveals a stable hexagonal wurtzite structure with (002) preferential orientation for both deposition methods. Optical analysis shows band gaps of 2.40 eV and 2.32 eV for sputtering and CBD methods, respectively. Overall, the experimental results suggest that CdS thin films grown by sputtering may be favorable as the window layer for solar cell applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Marzieh Kajbafvala, Omran Moradlou, Alireza Z. Moshfegh
Summary: The development of low-cost and earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) is crucial for energy applications. Nickel sulfide thin films (NiSx) were successfully synthesized on conductive nickel foam substrates via chemical vapor deposition (CVD) at 300°C. By controlling the precursor ratio, a single phase of Ni3S2 was obtained, showing superior HER activity with the lowest overpotential and high accessibility to active sites on the electrochemical surface area. The study demonstrates the importance of precursor ratio in crystalizing different phases of nickel sulfides and the superior performance of Ni3S2 for HER.
Article
Chemistry, Physical
Xue-An Liu, Junxin Wang, Dajiang Tang, Zhangfa Tong, Hongbing Ji, Hui-Ying Qu
Summary: By mimicking the geological structure of plants, a novel layered double hydroxide with diverse porous structures has been designed to address issues such as insufficient energy storage and performance degradation caused by traditional porous structures. Excellent transmittance modulation, switching speed, specific capacity, and durability have been achieved, demonstrating remarkable electrochromic and energy storage performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Hyung-Jin Lee, Soo -Young Moon, Hee-Jae Lee, Dong-Wook Byun, Seung-Woo Jung, Michael A. Schweitz, Minkyung Kim, Jong -Min Oh, Weon Ho Shin, Chulhwan Park, Sang-Mo Koo
Summary: In this study, the influence of post-deposition annealing (PDA) on lithium phosphate (Li3PO4) thin films on silicon carbide (SiC) substrate was investigated in terms of materials and electrical properties. The results showed that the Li3PO4 films remained amorphous even after annealing at 400 degrees C. The highest ionic conductivity of 1.00 x 10-4 S/mm was achieved at 300 degrees C, and the rectification ratio of the annealed device was 1.45 x 103, 23 times higher than the as-deposited Li3PO4/SiC device without annealing. It suggests that precise control of Li3PO4 deposition can greatly enhance the performance of electronic devices and solid electrolyte batteries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Environmental
Supriya J. Marje, Vinod V. Patil, Vinayak G. Parale, Hyung-Ho Park, Pragati A. Shinde, Jayavant L. Gunjakar, Chandrakant D. Lokhande, Umakant M. Patil
Summary: A rational combination of metal cations is necessary for improved electrochemical energy storage performance of bimetal compounds. Adjusting the ratio of nickel and cobalt can enhance the physicochemical properties and electrochemical capacitive performances of nickel cobalt phosphate materials. The synergy between nickel and cobalt species in the thin film electrodes contributes to the excellent electrochemical capacitive performance of hybrid asymmetric devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Navnath S. Padalkar, Shrikant V. Sadavar, Rohini B. Shinde, Akash S. Patil, Umakant M. Patil, Dattatray S. Dhawale, Ravindra N. Bulakhe, Hyungsang Kim, Hyunsik Im, Ajayan Vinu, Chandrakant D. Lokhande, Jayavant L. Gunjakar
Summary: Layer-by-layer mesoporous nanohybrids of Ni-Cr-layered double hydroxide (Ni-Cr-LDH) and polyoxotungstate nanoclusters (Ni-Cr-LDH-POW) were successfully prepared via exfoliation reassembling strategy, showing excellent electrochemical functionality and advantages for hybrid supercapacitors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Rohini B. Shinde, Akash S. Patil, Shrikant Sadavar, Yogesh M. Chitare, Vikas V. Magdum, Navnath S. Padalkar, Umakant M. Patil, Saji T. Kochuveedu, Vinayak G. Parale, Hyung-Ho Park, Chandrakant D. Lokhande, Jayavant L. Gunjakar
Summary: This article reports the preparation of mesoporous layered nanohybrids of zinc chromium layered double hydroxide (Zn-Cr-LDH) and polyoxotungstate (POW) anions via an exfoliation-reassembling process. The Zn-Cr-WO nanohybrids displayed the highest selectivity towards Cl-2 and showed fastest response and recovery times of 5 and 133 s, respectively, at room temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Navnath S. Padalkar, Shrikant Sadavar, Rohini B. Shinde, Akash S. Patil, Umakant M. Patil, Dattatray S. Dhawale, Habib M. Pathan, Shrikrishna D. Sartale, Vinayak G. Parale, Ajayan Vinu, Chandrakant D. Lokhande, Jayavant L. Gunjakar
Summary: The study demonstrates the use of exfoliation-restacking strategy to prepare Ni-Cr-LDH-POV nanohybrids for high-performance HSC, showing improved electrochemical performance and increased specific capacity. The resulting nanohybrid electrode exhibits high specific energy and power with excellent cyclic durability over 10,000 charge-discharge cycles, highlighting the potential for high-performance HSC.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Shrikant Sadavar, Navnath S. Padalkar, Rohini B. Shinde, Akash S. Patil, Umakant M. Patil, Vikas V. Magdum, Yogesh M. Chitare, Shirin P. Kulkarni, Ravindra N. Bulakhe, Vinayak G. Parale, Jayavant L. Gunjakar
Summary: By using two-dimensional graphene oxide nanosheets as a hybridization matrix, the electrode performance of layered double hydroxides can be improved. The study showed that the hybridized nanohybrids exhibited enhanced specific capacity, high electrical conductivity, and improved charge transfer kinetics. Aqueous and solid-state hybrid supercapacitors fabricated using the optimized nanohybrids demonstrated excellent specific capacitance, energy, and power performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Electrochemistry
P. P. Bagwade, D. B. Malavekar, S. B. Ubale, R. N. Bulakhe, I. In, U. M. Patil, C. D. Lokhande
Summary: Cobalt tungstate (CoWO4) thin films were synthesized for the first time using the successive ionic layer adsorption and reaction (SILAR) method. The films exhibited a monoclinic crystal structure and had a surface morphology consisting of agglomerated cauliflower-like spherical nanoparticles. The specific capacitance and capacitance retention of the CoWO4 thin film electrode were found to be high, and the thin films were also used to assemble a flexible solid-state symmetric supercapacitor device with good performance.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Suraj A. Khalate, Sujit A. Kadam, Yuan-Ron Ma, Sachin B. Kulkarni, Vinayak G. Parale, Umakant M. Patil
Summary: This study reports the design of a nanostructured cobalt iron phosphate catalyst for robust electrochemical water splitting. The catalyst was synthesized using a hydrothermal method and deposited on low-cost stainless steel substrates. The composition ratio of cobalt and iron was found to affect the structural and electronic properties of the catalyst, with a 50:50 ratio of cobalt to iron showing the best performance for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The catalyst exhibited high activity and stability for overall water splitting, with small overpotentials and a required potential of 1.75 V after long-term catalysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
D. B. Malavekar, V. C. Lokhande, D. J. Patil, S. B. Kale, U. M. Patil, T. Ji, C. D. Lokhande
Summary: In this study, amorphous nickel tungstate electrocatalyst was synthesized using a facile method and characterized by various techniques. The electrochemical analysis demonstrated that the electrocatalyst exhibited high efficiency and stability for water electrolysis in alkaline media. This research is of great significance for efficient hydrogen production through water electrolysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Seung-Hyun Chun, Pranav K. Katkar, Supriya A. Patil, Jae Ho Jeon, Hong Ryeol Na, Navnath S. Padalkar, Sahng-Kyoon Jerng, Sunghun Lee
Summary: A binder-free nickel-manganese phosphate composite with a micropetal-like structure was successfully synthesized. The material exhibited high electrochemical properties and good cycling stability. It was further used in a flexible asymmetric solid-state supercapacitor, showing high energy density and desirable longevity.
Article
Chemistry, Analytical
Amruta. D. Salunkhe, P. S. Pawar, P. K. Pagare, A. N. Kadam, P. K. Katkar, A. P. Torane
Summary: This study reports the synthesis of bimetallic oxide electrode materials derived from metal-organic frameworks (MOFs) for high-performance supercapacitor applications. The optimal NCM electrode annealed at 300 degrees C shows a maximum specific capacity of 188 mAh/g at 5 Ag-1 and excellent rate capability of 85.25% after 3000 cycles, surpassing its single-component counterpart. Furthermore, an asymmetric device (ASC) composed of NiCo2O4-MOF (positive electrode) and activated carbon (negative electrode) exhibits an excellent energy density of 84.26 Wh kg-1 at a power density of 1185 W kg-1 with 83.23% capacitance retention after 10,000 cycles.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Energy & Fuels
Sajjad Hussain, Pranav K. Katkar, Dhanasekaran Vikraman, Zulfqar Ali Sheikh, Ghazanfar Nazir, Khalid Mujasam Batoo, Deok-Kee Kim, Hyun-Seok Kim, Jongwan Jung
Summary: In this work, MXene-assisted cobalt manganese phosphate thin films were prepared and used as polymer-free active materials for hybrid supercapacitors. The films exhibited enhanced specific capacitance and robust performance. Additionally, the MXene-CMP supercapacitors showed high energy density and better cyclability at a relatively high power density.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Energy & Fuels
Sambhaji S. Kumbhar, Shraddha B. Bhosale, Sachin S. Pujari, Vinod V. Patil, Nitish Kumar, Rahul R. Salunkhe, Chandrakant D. Lokhande, Umakant M. Patil
Summary: The surface area of cobalt vanadium oxide (CVO) material, which contributes to enhanced charge-storing ability, is controlled through changing growth dynamics. The resulting hydrous cobalt vanadium oxide nanoparticles thin film electrodes show altered surface area and high specific capacitance (Cs) of 793 F g(-1) at 0.5 A g(-1). Aqueous and solid-state hybrid supercapacitor devices constructed using CVO1:1 demonstrate high Cs and specific energy (SE), indicating their potential in electrochemical energy storage.
Review
Materials Science, Multidisciplinary
Vikas V. Magdum, Yogesh M. Chitare, Shirin P. Kulkarni, Prashant D. Sawant, Shraddha A. Pawar, Shweta V. Talekar, Chandrakant D. Lokhande, Umakant M. Patil, Sharad B. Patil, Jayavant L. Gunjakar
Summary: Among transition metal dichalcogenides, group VI layered metal (Mo and W) dichalcogenides (LMD) have gained research interest due to their unique layered structure and physicochemical properties. Solution-based deposition methods provide tunable properties for LMDs, allowing for diverse applications in energy storage, catalysis, optoelectronics, and more. Understanding the research progress and future scope of solution-based deposited group VI LMDs is crucial for their utilization in various fields.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Pratik Ashok Patil, Suraj Anandrao Khalate, Umakant Mahadev Patil, Rajendra Devidas Kale, Sachin Babasaheb Kulkarni
Summary: This study prepared sulfur-doped nickel oxide (S-NiO) honeycomb nanostructure electrodes via a cost-effective chemical bath method and explored their structural, morphological, and electrochemical properties. The S-NiO electrode exhibited excellent capacitance performance in aqueous electrolyte, while graphite as the negative electrode showed significant capacitance performance in a wide operating potential window. The AAHSc device demonstrated remarkable performance in terms of high energy density, power density, capacitance retention, and coulombic efficiency.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Pratik Ashok Patil, Suraj Anandrao Khalate, Umakant Mahadev Patil, Rajendra Devidas Kale, Sachin Babasaheb Kulkarni
Summary: In this study, sulfur-doped nickel oxide honeycomb nanostructure electrodes were prepared using a cost-effective chemical bath method and optimized through a Capping, Doping and Annealing (CDA) mechanism for improved electrochemical performance of hybrid supercapacitors. The research showed that the hybrid supercapacitors exhibited high specific capacitance, energy density, and excellent cycle stability.
MATERIALS ADVANCES
(2023)
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)
