Article
Materials Science, Multidisciplinary
Shan-Fei Wang, Yi Wang, Jia-Cheng Wen, Hong-Li Suo, Zhuang-Zhuang Liu, Wen-hua Suo, Cong-Cong Zhao
Summary: By using an environmentally friendly acid-alcohol system solution for electrochemical polishing of 3D printed titanium alloy, this study investigated the impact of electrochemical polishing on surface roughness and optimized process parameters to achieve a surface roughness comparable to mechanical grinding and polishing, meeting the requirements for subsequent assembly and use.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Marina Maslova, Vladimir Ivanenko, Lidia Gerasimova, Anna-Carin Larsson, Oleg N. Antzutkin
Summary: A new low-cost and simple synthesis method for titanium phosphate functional materials has been developed, which is based on the unconventional transformation route of solid precursor-sorbent-anode material. The influence of synthesis conditions on titanium phosphate composition has been thoroughly studied, leading to the discovery of optimal conditions for obtaining pure TiHP phase. TiHP exhibits high sorption and electrochemical capabilities, with potential applications in multicomponent liquid radioactive waste treatment and precursor for Li-ion batteries.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Jia Liu, Zhen Wang, Zhengyang Xu
Summary: Electrochemical polishing (ECP) is a cost-effective method for polishing difficult-to-machine materials. However, when a neutral salt solution is used as the electrolyte, a passivation film forms on the surface of passive metals, compromising the polishing efficiency and surface quality. To address this issue, this paper introduces an ECP method assisted by a high-speed flow of micro-abrasive particles (ECFAP). The flow of abrasive particles enables simultaneous electrochemical dissolution and abrasive polishing on the workpiece surface, resulting in improved polishing efficiency and quality.
Article
Electrochemistry
Han Liu, Minheng Ye, Zuoyan Ye, Lili Wang, Yuting Hao, Jingxi Zhu, Ping Xu, Chao Wang
Summary: The study systematically investigated the anodic behaviors of 7075 aluminum alloy during the electrochemical polishing process in phosphoric acid under different applied potentials, and intensively studied the changes in surface morphology, roughness, electric current, and resistance. The experimentally validated factors influencing each stage and the effects of impurity phases in the ECP process. Under optimized conditions, a mirror surface with reduced roughness can be achieved through ECP.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Yanying Hou, Lujie Liu, Qiaole He, Di Zhang, Jiayang Jin, Banghe Jiang, Liming Zhao
Summary: This study investigated the adsorption characteristics of chitooligosaccharides on ion-exchange resin and found that the adsorption equilibrium followed the Langmuir model, with adsorption capacity decreasing with increasing degree of polymerization. The adsorption kinetics were well described by the pseudo-second-order kinetic model. Liquid-film diffusion and intra-particle diffusion were identified as the rate-limiting steps for adsorption. Thermodynamic analysis revealed that the adsorption of chitooligosaccharides on HX-7 resin was spontaneous and feasible, with higher polymerization degrees leading to stronger interaction forces and more favorable adsorption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
B. Senthil Rathi, P. Senthil Kumar, R. Ponprasath, K. Rohan, N. Jahnavi
Summary: Efforts have been made in this study to optimize operating parameters for optimal arsenic removal in batch mode operation, with almost 100% maximum removal and at least 91% extraction achieved within the 5?15 mg/L range of arsenic concentration and 5?20 V supply voltage range.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
A. A. M. Abusultan, J. A. Wood, T. Sainio, A. J. B. Kemperman, W. G. J. van der Meer
Summary: Reverse osmosis (RO) membrane technology is widely used for producing high-quality drinking water. An ion exchange resin - bipolar membrane electrodialysis hybrid process was developed for sustainable RO permeate remineralization. The most suitable resin for the remineralization process should have high selectivity for calcium and magnesium and low selectivity for monovalent ions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Bingjin Yu, Yan Gu, Jieqiong Lin, Silin Liu, Sen Zhang, Mingshuo Kang, Yuan Xi, Yinghuan Gao, Huibo Zhao, Qingsong Ye
Summary: This study investigates the effect of magnetorheological polishing on the surface quality of CoCrMo alloy. By designing a polishing tool and planning a path, the polishing effect is optimized. The influence of different process parameters on polishing forces and surface roughness values is also studied. The results demonstrate the ability of magnetorheological polishing to improve the surface quality of CoCrMo alloys, providing guidance for the development of advanced biomedical implants.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Applied
Barbara S. Sanchez, Claudia A. Neyertz, Maria S. Zanuttini, Carlos A. Querini, Gustavo Mendow
Summary: This paper proposes a combined process using Pd-Sn catalysts supported on an anion exchange resin to reduce nitrate content in groundwater. The results show that this catalyst is highly efficient, selective, and stable.
Article
Chemistry, Physical
Lei Zhang, Chen Ding, Jianfa Bu, Zhirui Zhang, Yongguang Wang, Cheng Fan
Summary: This paper proposes a new method for polishing titanium alloy using a pulsating air jet and introduces its working principle and material removal mechanism. By conducting orthogonal experiments, the influence degree of each process parameter on the polishing of titanium alloy is determined, and a prediction model of surface roughness is established.
Article
Chemistry, Physical
Lukas Hackl, Shao-Wei Tsai, Bavisha Kalyan, Chia-Hung Hou, Ashok Gadgil
Summary: Capacitive deionization (CDI) technologies have the potential to replace reverse osmosis as cost-competitive alternatives for brackish water treatment. This study investigates the impact of co-ion sorption and faradaic side reactions on ion exchange resin functionalized desalination electrodes. The findings show that the electrically regenerated ion exchange (ERI) system effectively captures salt at low applied voltages, and Faradaic side reactions facilitate the functionality of ERI.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Automation & Control Systems
Pakin Jaritngam, Viboon Saetang, Huan Qi, Chaiya Dumkum
Summary: Several studies have shown the effectiveness of laser polishing in smoothing metal surfaces with initial roughness less than 10 μm. However, the performance of laser polishing on additively manufactured surfaces with different levels of morphology and roughness greater than 10 μm has not been extensively explored. This study aimed to investigate the viability of laser polishing for smoothing such surfaces. Polishing experiments were conducted on 3D printed samples and shot-peened Ti6Al4V titanium alloy sheets with varying surface roughness. The results showed that a significant improvement in surface roughness was achieved with suitable polishing conditions.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Esra Altiok, Fatma Sen, Joanna Wolska, Piotr Cyganowski, Marek Bryjak, Nalan Kabay, Muserref Arda, Mithat Yuksel
Summary: This research investigated the removal of boron and arsenic from geothermal water using newly synthesized gel-like chelating resins. The results showed that the novel resins were able to reduce boron and arsenic concentrations in geothermal water below permissible levels for agricultural irrigation and drinking water. The optimal resin concentration for boron removal was determined to be 2 g/L, while for arsenic removal, a resin concentration of 8 g/L was needed for 94% removal using the novel resins compared to 32 g/L for commercially available resin. Column performance characteristics of the resins were also studied and compared to a commercially available resin.
Article
Metallurgy & Metallurgical Engineering
Zhao Pingping, Song Yingwei, Dong Kaihui, Han En-Hou
Summary: Due to its compact passive film, titanium alloys show excellent corrosion resistance. However, the passive film is often damaged by aggressive ions during practical applications. Among these ions, F- is the most harmful due to its strong complexation with Ti. The corrosive effect of F- varies with pH and can be mitigated by inhibitory ions. In this study, the acceleration effect of H+ and F- as well as the inhibition effect of Fe3+ on the corrosion behavior of TC4 alloy were investigated through electrochemical measurements. The findings demonstrate that F- has a considerable aggressive effect while H+ has only a slight destructive effect. Additionally, Fe3+ can reduce the corrosion of TC4 alloy by shifting the anodic curves and consuming F- through compound formation.
ACTA METALLURGICA SINICA
(2023)
Article
Chemistry, Multidisciplinary
Rui Min, Lishi Wang, Yihang Cheng, Xinbin Hu
Summary: The mechanical and electrochemical interaction between ion-exchange resin particles and the metal substrate can effectively polish metal surfaces in an environmentally friendly way. The 'dry' polishing process can significantly reduce surface roughness and improve corrosion resistance of the polished materials.
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)