Article
Materials Science, Coatings & Films
Juyi Yang, Yanbin Zhao, Jianwei Dai, Linyuan Han, Qiangsheng Dong, Lu Zhang, Jing Bai, Feng Xue, Paul K. Chu, Chenglin Chu
Summary: In this study, a polyethyleneimine/polyacrylic acid (PEI/PAA) multilayered coating is prepared by layer-by-layer (LbL) assembly on the WE43 Mg alloy, followed by mineralization of hydroxyapatite (HA) on the LbL multilayer. The composite coating with a compact surface shows improved corrosion resistance. The formation mechanism, structure, and properties of the organic/inorganic composite coating are investigated systematically.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Iryna Kozina, Halina Krawiec, Maria Starowicz, Magdalena Kawalec
Summary: Spin coating technique was used to deposit chitosan coatings on the surface of Mg20Zn magnesium alloy, resulting in increased corrosion resistance by forming CaSiO3 and Ca-3(PO4)(2) compounds on its surface. Corrosion rate was reduced from 3.2 mm/year to 1.2 mm/year for uncoated and coated substrates, respectively.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Shifeng Wen, Xianglei Liu, Jiahui Ding, Yulai Liu, Ziting Lan, Zimeng Zhang, Guangmeng Chen
Summary: In this study, a hydroxyapatite (HAP) coating was hydrothermally synthesized on the surface of magnesium alloy, resulting in improved morphology structure and corrosion resistance with better control over synthesis conditions. This approach effectively delayed the early corrosion of the magnesium alloy substrate.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2021)
Review
Chemistry, Physical
Xiaodong Xue, Chunyong Liang, Donghui Wang, Feng Peng
Summary: Magnesium and its alloys have excellent mechanical properties and biodegradability, making them promising candidates in industrial and biomedical fields. However, their rapid corrosion limits their widespread applications. The development of self-healing coatings is essential to repair the damage and enhance their corrosion protection ability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Anawati Anawati, Medio Febby Fitriana, Muhammad Dikdik Gumelar
Summary: The bilayer anodic film/beeswax-colophony structure effectively improved the corrosion resistance of magnesium alloy surface, showing a significant decrease in corrosion current density and an increase in film resistance.
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Zhi-Xin Han, Xiang-Mei Liu, Lei Tan, Zhao-Yang Li, Yu-Feng Zheng, Kelvin Wai-Kwok Yeung, Zhen-Duo Cui, Yan-Qin Liang, Sheng-Li Zhu, Shui-Lin Wu
Summary: A protective coating of hybrid polycaprolactone/indocyanine green was constructed on AZ31 Mg alloy to control its degradation rate through NIR light irradiation. The coating effectively protected the Mg alloy from corrosion, but its corrosion resistance was significantly reduced under NIR light irradiation.
Article
Materials Science, Multidisciplinary
Xinran Yao, Yujie Yang, Minxing Zheng, Jinghong Wang, Changyang Liu, Jiapeng Sun, Guosong Wu
Summary: This study proposes a strategy to enhance the corrosion resistance of magnesium alloys by transforming corrosion products into protective coatings. By immersing a magnesium-neodymium alloy in potassium dihydrogen phosphate solution, a uniform MgHPO4·3H2O coating is formed, which significantly improves the corrosion resistance of the alloy.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jithu Jayaraj, A. Srinivasan, C. Arunchandran, V. Rajinikanth
Summary: This study proposes a two-stage chemical conversion coating process for magnesium alloys. The results show that the water-based coating has self-healing characteristics, while the ethanol-based coating has better corrosion resistance. Both coatings exhibit acceptable cell viability under physiological conditions.
APPLIED SURFACE SCIENCE
(2024)
Article
Metallurgy & Metallurgical Engineering
Tong Bu, Ruijie Jia, Tao Ying, Andrej Atrens, Pengbo Chen, Dajiang Zheng, Fuyong Cao
Summary: A novel coating on the Mg1Mn alloy was produced by anodic polarization combined with hydrothermal treatment (AP + H) in 0.1 M Na2CO3 solution. The coating consisting of MgCO3, Mg(OH)(2), and MgO provided satisfactory protection in 3.5 wt% NaCl, but showed increased corrosion rate after 72 hours. The failure of the coating was attributed to second phase particles or impurities in the matrix. The AP + H coating is considered suitable as a primer coating for Mg applications in kitchen ware, biomedical areas, or industry.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Christos Kousis, Patrick Keil, Neil McMurray Hamilton, Geraint Williams
Summary: In-situ scanning Kelvin probe and time-lapse photography were used to investigate filiform corrosion (FFC) of organic coated magnesium alloys. The propagation rates of FFC were found to increase logarithmically with chloride ion concentration and were strongly influenced by relative humidity. Surface analysis after corrosion revealed chloride abundance near the filament leading edge and evidence of sequestration within corroded regions behind. The FFC mechanism involves chloride-induced anodic dissolution at the front coupling with water reduction on a cathodically-activated corroded surface behind.
Article
Chemistry, Physical
Kui Xue, Yan-Jin Li, Tian-Hao Ma, Lan-Yue Cui, Cheng-bao Liu, Yu-hong Zou, Shuo-Qi Li, Fen Zhang, Rong-Chang Zeng
Summary: In this research, a self-assembled amorphous calcium carbonate (ACC)@curcumin (Cur) loaded polymethyltrimethoxysilane (PMTMS) coating on micro-arc oxidation (MAO) coated magnesium (Mg) alloy was proposed to overcome the issues of rapid corrosion and bacterial infection in using biodegradable Mg alloy for biomedical materials. The coating exhibited favorable corrosion resistance, dual antibacterial ability, and good biocompatibility. Cur was employed as an antibacterial agent and photosensitizer for photothermal therapy. The core of ACC significantly improved the loading of Cur and the deposition of hydroxyapatite corrosion products during degradation, thus enhancing the long-term corrosion resistance and antibacterial activity of Mg alloys.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jun Chen, Tingting Jiang, Xiangna Lan, Kai Kang, Fanggong Cai, Sude Ma
Summary: The composite LDHs film provides excellent initial protection to Mg-4Zn alloy, and during long-term immersion, corrosion products are deposited on both the bare alloy and the film, enhancing barrier and self-healing effects. Despite filiform corrosion on the substrate, the coated sample remains intact with only local pit corrosion after 18 days of immersion.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Coatings & Films
Runjia Liu, Yan Liu, Qiwen Yong, Zhi-Hui Xie, Liang Wu, Chuan-Jian Zhong
Summary: The long-term corrosion resistance of conventional micro-arc oxidation (MAO) coatings on magnesium alloy is limited by the inherent micro-scale pores. Zeolitic imidazolate framework-8 (ZIF-8) and zinc gluconate (ZnG) loaded ZIF-8 (ZnG@ZIF-8) were synthesized and incorporated into the MAO coating to enhance the corrosion resistance. The (ZIF-8 + ZnG@ZIF-8)/MAO composite coating showed significant improvement in corrosion protection compared to the blank MAO coating.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yue Liu, Huan Yao, Zhi-Hui Xie, Gang Yu, Chuan-Jian Zhong
Summary: In this study, a new metal-organic framework (MOF) modified TiO2 nanotubes (NTs) composite was prepared by a solvothermal method, which showed improved photoelectrochemical performance under visible light irradiation and could be used as a stable photoanode for photogenerated cathodic protection. Compared with single-component TiO2 photoanode, the MOF/TiO2 composite exhibited higher photogenerated current density, lower charge transfer resistance, and negatively shifted bias threshold, providing stable photogenerated cathodic protection for the electrode.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Abdallah Nayad, Ali Hasnaoui, Youness Hadouch, Lahcen Fkhar, Rachid Idouhli, Abouelfida Abdessalam, Ahmad Mehdi, Burak Dikici, Daoud Mezzane, Larbi El Firdoussi, Mustapha Ait Ali
Summary: Silicon is widely used in semiconductors and electronic devices, and miniaturizing it in two-dimensional scale is a significant challenge. Researchers have successfully synthesized air stable functionalized silicon nanosheets through direct exfoliation using thermal heating and benzyl groups. These silicon nanosheets exhibit high dielectric permittivity and have potential applications as electrode materials for electrochemical detection.
Article
Metallurgy & Metallurgical Engineering
Mosab Kaseem, Tehseen Zehra, Burak Dikici, Ali Dafali, Arash Fattah-alhosseini
Summary: The formation of inorganic-organic hybrids (IOH) on metallic substrates plays a crucial role in improving their structural and functional features. In this study, an organic coating (OC) consisting of coumarin-3-carboxylic acid (3-CCA) and albumin (ALB) was grown on an inorganic layer (IC) produced by plasma electrolysis of AZ31 Mg alloy. The synergistic actions between OC and IC resulted in the formation of a flake-like structure that sealed the structural defects of IC and provided chemical protection and photocatalytic performance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Erdem Sakar, Omer Guler, Buenyamin Alim, Yakup Say, Burak Dikici
Summary: This study successfully produced low-cost high entropy alloys (HEAs) with superior properties using the mechanical alloying method. The HEAs showed better shielding characteristics for photon and particle radiations compared to standard shielding concretes. Among the HEA alloys, CoNiFeCr alloy exhibited the best shielding ability and can be used for shielding applications involving various types of radiations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Roghaye Samadianfard, Davod Seifzadeh, Burak Dikici
Summary: In order to protect the AM60B magnesium alloy from corrosion, a sol-gel coating containing hydroxylated g-C3N4 nanoplates was utilized. The chemical composition of the hydroxylated g-C3N4 nanoplates was examined using X-ray photoelectron spectroscopy (XPS). The hydroxylation process did not impact the properties of the g-C3N4 nanoplates. After incorporating the modified g-C3N4, a dense sol-gel coating with uniform distribution was obtained. The addition of modified g-C3N4 significantly improved the anticorrosion properties of the sol-gel film due to the chemical bonding between the coating and the nanoplates, as revealed by electrochemical impedance spectroscopy (EIS) examinations in simulated acid rain.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Engineering, Biomedical
M. Demirel, N. Aslan, B. Aksakal, M. E. Arslan
Summary: In this study, the effects of nano-gold (nAu) and nano-silver (nAg) on a synthesized bioceramic bone graft were evaluated. The chemical and morphological properties of the grafts were examined, and cell viability and nuclear abnormality tests were performed. The results showed that nAg contained higher cytotoxicity and led to higher nuclear abnormality compared to nAu.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yakup Say, Burak Dikici, Mosab Kaseem, Iskender Ozkul, Omer Guler
Summary: The CoCrFeNi alloy is a well-known four-component equiatomic alloy with low-cost composition. In this study, the effects of adding Al and Ti as the fifth metal to the base alloy were investigated. The results showed that the addition of Al and Ti significantly changed the hardness and corrosion properties of the alloy, with Ti having a more noticeable effect on improving corrosion resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Inorganic & Nuclear
O. Zakir, A. Ait-Karra, R. Idouhli, M. Khadiri, B. Dikici, A. Aityoub, A. Abouel, A. Outzourhit
Summary: Titanium dioxide nanotubes (TiO2 NTs) were synthesized by electrochemical anodizing of pure titanium in glycerol-water solution with ammonium fluoride. The properties of the NTs, including diameter and length, were controlled through the anodization time. Characterization techniques like SEM, XPS, XRD, Raman spectroscopy, and EIS were used to analyze the synthesized NTs. The results showed that the internal diameter of the NTs could be adjusted from 30 to 130 nm, while the length increased progressively up to a maximum of approximately 3.32 μm after 90 minutes. XPS analysis confirmed the formation of TiO2 with an oxidation state of +4, and XRD and Raman spectroscopy revealed a mixture of anatase and rutile phases. The TiO2 NTs exhibited n-type semiconductor behavior according to Mott-Schottky analysis. Photocatalytic testing of the TiO2 NTs demonstrated that the length of the NTs had a significant impact on the photocatalytic efficiency, with NTs of 2.55 μm length showing an excellent efficiency of approximately 79.69% with a kinetic rate of 0.0051 min-1. Increasing the solution pH from 3 to 12 resulted in an increase in degradation efficiency from 31.6% to 93.1%.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Review
Electrochemistry
O. Zakir, A. Ait-Karra, R. Idouhli, M. Khadiri, B. Dikici, A. Aityoub, A. Abouelfida, A. Outzourhit
Summary: This review provides a comprehensive overview of titanium dioxide nanotubes (TiO2 NTs) and their synthesis methods, highlighting recent progress and modifications that improve their properties. The influence of anodization parameters, the effect of annealing temperature, and modified TiO2 NT arrays, including doping and heterostructure, are discussed in detail. Additionally, the article summarizes recent advances in the applications of TiO2 nanotubes in photocatalysis, hydrogen production, dye-sensitized solar cells, and the detection of heavy metal ions. The existing problems and further prospects in this rapidly developing field are also briefly addressed.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
A. Ait Baha, K. Tabit, R. Idouhli, M. Khadiri, O. Zakir, B. Dikici, A. Abouelfida
Summary: The effect of hydrothermal parameters on the zeolitization of coal fly ash and fumed silica was investigated using the L9 orthogonal Taguchi method. The operational parameters considered were Si/Al ratio, NaOH concentration, synthesis time, and hydrothermal temperature. The formed crystals were examined using various techniques. The results showed that high temperature, medium concentration, lower Si/Al ratio, and long-time treatment were the ideal conditions for zeolitization.
Article
Crystallography
Hakan Yilmazer, Ihsan Caha, Burak Dikici, Fatih Toptan, Murat Isik, Mitsuo Niinomi, Masaaki Nakai, Alexandra Cruz Alves
Summary: This study investigated the influence of high-pressure torsion (HPT) processing parameters and solution treatment (ST) on the corrosion and tribocorrosion behavior of CoCrMo (CCM) alloys for potential biomedical applications. The corrosion behavior was evaluated using potentiodynamic scanning and electrochemical impedance spectroscopy tests, while tribocorrosion tests were conducted in a reciprocating ball-on-plate tribometer. The results showed that HPT and ST processes had minimal effect on the corrosion resistance of the samples, but ST-treated samples exhibited higher material loss during sliding in standard phosphate-buffered saline at body temperature compared to HPT-treated samples.
Article
Engineering, Manufacturing
Kubilay Aslantas, Bilge Demir, Ahmet Serdar Guldibi, Mitsuo Niinomi, Burak Dikici
Summary: This study compared the micro-mill machining performance of the TNTZ alloys with commercial CP Ti and Ti6Al4V ELI. The results showed that the Fx cutting forces for TNTZ are about 3 and 2 times higher than for CP Ti and Ti6Al4V alloys, respectively. The dominant damage type in TNTZ alloy is chipping.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Oktay Yigit, Turan Gurgenc, Burak Dikici, Mosab Kaseem, Carl Boehlert, Ersin Arslan
Summary: In this study, pure Mg substrate surfaces were coated with SrAp and GO biocomposite structures using the hydrothermal method to increase biocompatibility and achieve moderate biodegradation rate.
Article
Materials Science, Multidisciplinary
Aysel Oktay, Hakan Yilmazer, Agata Przekora, Yasemin Yilmazer, Michal Wojcik, Burak Dikici, Cem Bulent Ustundag
Summary: In this study, Ti6Al7Nb and Ti29Nb13Ta4.6Zr alloys coated with graphene oxide (GO) and serotonin (Ser) were evaluated for their in-vitro corrosion response, biocompatibility, and wettability. The results showed that only the GO and GO+Ser coatings had a negative effect on the corrosion resistance of TNTZ alloy. However, the GO+Ser coatings improved the corrosion resistance and wettability of the Ti6Al7Nb alloy, making it more suitable for cell adhesion and proliferation.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Tehseen Zehra, Burak Dikici, Ali Dafali, Mosab Kaseem
Summary: This study aims to improve the anti-corrosion and photocatalytic activity of porous inorganic layers by using chromophores derived from phytochemicals and pheromones. Organic acid (carminic acid) and organic salt (indigo carmine) obtained from pheromones and phytochemicals, respectively, are used to modify the porous surface of inorganic layers on AZ31 Mg alloy. The coatings of phytochemicals and pheromones have double linkages and negatively charged functional groups, enabling the sealing of the sponge-like structure of the inorganic layer through various bonding mechanisms. The phytochemical coating exhibits excellent electrochemical stability and a high photocatalytic efficiency in degrading methylene blue.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Coatings & Films
L. A. Ali, B. Dikici, N. Aslan, Y. Yilmazer, A. Sen, H. Yilmazer, M. Niinomi
Summary: In this study, the corrosion and surface properties of Ti-29Nb-13Ta-4.6Zr alloys coated with TiN, ZrN, and CrN layers using the PVD technique were investigated. The coatings' hardness, adhesion resistance, and antibacterial properties were also studied. The results showed that the coatings exhibited improved adhesion resistance and corrosion resistance, making them promising biomaterials with desirable surface and antibacterial properties.
SURFACE & COATINGS TECHNOLOGY
(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)
