Article
Materials Science, Multidisciplinary
J. G. R. Hernandez-Arteaga, H. Moreno-Garcia, A. G. Rodriguez
Summary: CeO2 thin films doped with Gd showed variations in lattice parameters and electron concentration with different Gd concentrations. Raman spectroscopy revealed phonon shifts related to changes in atomic bonding length and the presence of oxygen vacancies. Two p-n junctions were formed with CeO2:Gd layer, confirming the doping of CeO2 with Gd.
Article
Materials Science, Ceramics
I. A. Anokhina, I. E. Animitsa, V. Voronin, V. B. Vykhodets, T. E. Kurennykh, N. G. Molchanova, A. Vylkov, A. E. Dedyukhin, Y. P. Zaikov
Summary: Two lithium-doped phases were prepared using the Pechini method, showing that heat treatment above 1200 degrees C leads to a significant loss of lithium. Microwave sintering at lower temperatures can result in ceramics with stoichiometric lithium content. The introduction of lithium in the Gd-sublattice decreases the unit cell parameter, while doping at the Zr-sites increases it, leading to an increase in free cell volume. The conductivity of the samples can be enhanced by Li+-doping at the Gd3+-site, with one sample showing lower conductivity potentially due to trapping of oxygen vacancies. Conductivity measurements indicated the Li-containing phase acts as a pure oxide conduction at temperatures below 800 degrees C.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Natalia Sergienko, Elisabeth Cuervo Lumbaque, Nick Duinslaeger, Jelena Radjenovic
Summary: In this study, a novel anode based on TiO2 nanotube array (NTA) coated with Mo-doped MnxOy was developed and applied for the electrooxidation of persistent organic contaminants. The Ti/TiO2 NTA-MnxOy-Mo anode outperformed the commercial Ti/IrOx-Pt anode in terms of oxidizing organic contaminants, with lower electric energy consumption and without chlorine evolution reaction. Mo doping played a crucial role in the excellent performance of the synthesized anode, promoting the formation of oxygen vacancies and Mn/Mo redox couples, enhancing the oxidizing power and ensuring complete stability of the anode.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Carolina Sayury Miyashiro, Safia Hamoudi
Summary: This study investigates the photocatalytic degradation of acetamiprid using visible light irradiation. The results show that ZnO photocatalyst doped with palladium and graphene oxide has a positive effect on the photocatalytic activity of acetamiprid. Furthermore, Pd-GO-doped ZnO catalyst exhibits good stability even after five cycles of recycling in the reaction medium.
Article
Environmental Sciences
Mehmet Semih Bingol
Summary: Chitosan/polyvinyl alcohol/Gd2O3 hydrogels prepared by freeze-thaw method were used for the adsorption of Congo red dye. The results showed that the adsorbent had high removal efficiency for Congo red, and the Langmuir isotherm and pseudo-second-order kinetic model fitted well with the adsorption process.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Energy & Fuels
Jiandong Hong, Yanfeng Zhao, Jiang Wu, Xialin Xie, Pengcheng Zhao, Shuai Li, Hong Yao, Guangqian Luo, Zhenhao Liu, Xin Yang
Summary: In this study, an anti-sintering Al2O3/CaO sorbent was synthesized and applied for the adsorption of As2O3, showing improved performance compared to untreated CaO due to enhanced anti-sintering ability with the addition of Al2O3. The adsorption mechanism of As2O3 on Al2O3/CaO was proposed based on experimental and theoretical analysis, with the Al site identified as the main adsorption active site and electron transfer channel.
Article
Engineering, Environmental
Xin Hong Tai, Chin Wei Lai, Thomas Chung Kuang Yang, Chia-Yun Chen, Abdul Halim Abdullah, Kian Mun Lee, Joon Ching Juan
Summary: Indoor air pollutants, particularly volatile organic compounds (VOCs), have been found to have adverse health effects and have gained significant attention. A metal-free photocatalyst, boron-doped photoreduced graphene oxide (BPRGO), was successfully synthesized using a cost-effective UV irradiation method. This photocatalyst demonstrated high efficiency in degrading VOCs under UV-A irradiation, removing 80% of methanol within 6 hours. Additionally, up to 91% of the VOCs were mineralized into harmless CO2. The high photoactivity of BPRGO-1.0 was attributed to the presence of oxygenated boron groups (OBGs) and the right amount of boron dopants, which increased the hole carrier density and p-type conductivity, reducing charge carrier recombination and improving the photocatalytic removal of VOCs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
M. H. Ghozza, I. S. Yahia
Summary: The nanocrystalline gadolinium-doped cadmium manganite with the general formula GdxCd1-xMnO3 was prepared and characterized, showing potential applications in oxygen sensor electrodes and resistive switching equipment due to its structural, electrical, and magnetic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Meilin Duan, Canyu Hu, Delong Duan, Ruitian Chen, Chengming Wang, Di Wu, Tong Xia, Hengjie Liu, Yitao Dai, Ran Long, Li Song, Yujie Xiong
Summary: Photocatalysis provides a new avenue for organic synthesis. A Cu-doped photocatalyst has been successfully constructed with high catalytic activity and stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Chemical
Lei Bai, Zhongyue Guan, Shaojun Li, Shaoqing Zhang, Qiuxiang Huang, Zirong Li
Summary: In this study, Co3O4 and PdOx/Co3O4 nanocrystals were synthesized using HP-β-CD as an assistant, leading to improved performance in catalytic oxidation reactions. The presence of HP-β-CD resulted in higher activity and the formation of Pd (IV) species in the PdOx/Co3O4 nanocrystals, contributing to the enhanced catalytic activity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Ruiguang Zhao, Yujiang Li, Jianhua Ji, Quanyong Wang, Gongrang Li, Tao Wu, Bei Zhang
Summary: Nitrogen-doped reduced graphene oxide prepared by annealing chitosan in a graphene oxide matrix showed a high adsorption capacity for phenol and p-nitrophenol, and maintained a high removal efficiency over multiple reuse cycles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Reza Khaleghi Abasabadi, Abbas Ali Khodadadi, Yadollah Mortazavi
Summary: The study explores the impact of different types of carbon-nitrogen bonds on the activity and selectivity of the palladium active phase in the hydrogenation of cinnamaldehyde. Pyridinic nitrogen has a positive effect on the uniform distribution of Pd. The catalyst treated at 500 degrees Celsius shows high conversion and selectivity in the reaction.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Physical
Wenli Yu, Zhi Chen, Xianliang Jiang, Weiping Xiao, Bin Dong, Zexing Wu
Summary: This study explores a transition metal doping method to synthesize molybdenum-nickel bimetallic sulfide nanospheres for hydrogen evolution reaction in alkaline electrolyte. The synthesized catalyst exhibits outstanding electrocatalytic performance due to its unique spherical structure and synergistic effects between different elements, providing abundant active sites and electronic interactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Siqi Xie, Chunjing Tang, Huijie Shi, Guohua Zhao
Summary: Efficient photoelectrochemical removal of atrazine was achieved by adjusting the bias potential on the photo-anode, leading to a removal efficiency of 96.8% at the optimal potential. The study revealed the role of superoxide radicals and bias potential in enhancing atrazine degradation efficiency, providing a basis for establishing efficient PEC systems for pollutant remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Yinghui Tang, Qingyu Wu, Lilan Ye, Qiong Wu, Zhen Liu, Xiaoke Lian, Shaochun Yuan, Qinyi Wang, Yao Chen
Summary: This study developed a biochar coupled electrolysis-integrated system (BC-EC-BRS) for the removal of atrazine (ATZ) from road stormwater runoff. The BC-EC-BRS showed significantly higher removal rate of ATZ compared to other bioretention systems, indicating a synergistic promotion effect of electrolysis and biochar on ATZ removal.
SCIENCE OF THE TOTAL ENVIRONMENT
(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)