Article
Chemistry, Analytical
Shaohong Wei, Sujuan Li, Ruimin Wei, Shanshan Liu, Weimin Du
Summary: Daisy-like hexagonal WO3 and rose-like monoclinic WO3 hierarchical structures were fabricated through hydrothermal technique, and their acetone sensing properties were evaluated. The hexagonal WO3 sensor exhibited high sensitivity, selectivity, rapid response/recovery, and repeatability to acetone at 260 degrees C, attributed to the synergistic effects of specific crystal facets and intracrystalline structure. This work has practical significance for acetone environmental monitoring and diabetes breath diagnosis.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Peng Wang, Shisong Guo, Yunong Zhao, Zhixiang Hu, Yanting Tang, Licheng Zhou, Tiankun Li, Hua-Yao Li, Huan Liu
Summary: This study investigates the potential of WO3 nanoparticles supported by Nb2CTx MXene as a highly efficient material for acetone sensing. The results show that the composite material exhibits exceptional sensing performance with ultrasensitivity and an ultrafast response time. The sensor also demonstrates excellent stability, selectivity, and reversibility at high humidity. The gas-sensing properties of the sensor towards simulated exhaled breath of diabetic patients are evaluated.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Physical
Minggang Zhang, Mingyang Lu, Haixi Pan, Haili Bai, Hui Mei, Laifei Cheng
Summary: Facet engineering is used to optimize the surface of metal oxide semiconductors, leading to improved properties. The use of quasi-cubic alpha-Fe2O3 with high-energy facets exposed in ethanol sensing material fabrication shows excellent selectivity towards ethanol vapor, with high adsorption energy and good stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Qiao Wang, Hongchang Wu, Yanrong Wang, Jianpeng Li, Yifan Yang, Xu Cheng, Yibing Luo, Beixi An, Xiaojun Pan, Erqing Xie
Summary: The study synthesized yolk-shell Sb2O3/WO3 gas sensor and investigated its excellent performance in acetone gas detection. The sensor showed rapid response, low detection limit, and superior selectivity towards acetone.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xiaoxue Liu, Junzhuo Xu, Ziyu Cheng, Jiao Yang, Yingchun Li
Summary: Gas sensors based on WS2/WO3 nanosheets with p-n heterojunctions were successfully fabricated through an in situ oxidation technique. The sensor exhibited excellent repeatability, selectivity, and long-term stability for acetone determination, with a higher sensitivity compared to pure WO3. This work provides a simple and flexible avenue to synthesize heterojunctions with high structural homogeneity for various applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Optics
Ganesh D. Bhise, Sachin B. Karpe, Pooja More, Parag V. Adhyapak
Summary: An optical acetone detector based on Pd decorated WO3 nanostructures (Pd@WO3) is reported in this study. Gas-sensitive Pd@WO3 is coated on a fiber optic cable to detect gases such as acetone. Among all tested gases, acetone showed the maximum response with an optimized Pd@WO3 coating thickness of 10 μm.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Jian Ding, Shuqun Chen, Mingyi Xie, Yi Shen, Fei Li, Jiangchun Li, Zhen Li, Yang Wang
Summary: Defect and facet engineering are two effective approaches to tune the surface reactivity of metal-oxide-based sensing materials. In this study, WO3 nanosheets with exposed (002) crystal facet and oxygen vacancies defective [D-WO3-(002)] were obtained through a simple hydrothermal-hydrogenation process. The D-WO3-(002)-based acetone sensor exhibited excellent gas sensitive performance, including low limit of detection (0.5 ppm), wide range of response (0.5-100 ppm, S = 2.8 & SIM; 45.6), high selectivity, fast response-recovery, and excellent repeatability. The outstanding gas-sensing performance is attributed to the synergistic effects of the dominant (002) facet and the defect of oxygen vacancy structure, which effectively improved the surface reactivity of monoclinic WO3 nanosheets. This work demonstrates tremendous potential application prospect for environmental monitoring of acetone and non-invasive diagnosis of diabetes.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Qiao Wang, Xu Cheng, Yanrong Wang, Yifan Yang, Qing Su, Jianpeng Li, Beixi An, Yibing Luo, Zhengkun Wu, Erqing Xie
Summary: Tungsten oxide (WO3) with different morphologies including sea urchin shape exhibited excellent sensitivity and ultrafast response to acetone. Temperature studies using Raman spectroscopy revealed changes in the WO3 structures and expanded the understanding of interactions between gas and sensing materials. The special urchin-shaped structure and oxygen activity regulation contribute to the outstanding sensing properties of the WO3-based sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Jie Hu, Xueqing Xiong, Wangwang Guan, Haizhu Long, Lixiu Zhang, Haihang Wang
Summary: In this article, a novel flower-like WO3-In2O3 hollow heterostructure was successfully constructed and its gas sensing performance was systematically investigated. The results showed that the WO3-In2O3 structure achieved higher sensing performance compared to other sensing materials, attributed to the synergistic effect of its excellent structure and heterojunction configuration. This study provides new insights and strategies for improving the sensing performance of metal oxide semiconductor-based gas sensing materials.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Ceramics
Zichen Zheng, Kewei Liu, Yiwen Zhou, Marc Debliquy, Chao Zhang
Summary: Geranyl acetone plays a crucial role as a volatile organic compound (VOC) biomarker in food quality assessment, but the detection of its ultralow concentrations has been understudied. In this study, an iron (Fe)-doped WO3-x gas sensor was used for sensitive and selective geranyl acetone detection. The results showed enhanced sensitivity, low limit of detection, optimal selectivity, and outstanding stability. The study also demonstrated the practical application of the sensor for evaluating spoiled cooked rice, ensuring food security and improving palatability.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Materials Science, Multidisciplinary
Valentine Saasa, Bonex Mwakikunga
Summary: In this paper, the performance of acetone sensors was improved by enhancing the surface activity, gas diffusion, and decreasing the grain size. n-type semiconducting sensors and their cobalt doped-counterparts were synthesized by a hydrothermal method. The SnO2-Co sensor showed a high sensitivity to 5 ppm acetone at an operating temperature of 100 degrees C and exhibited high selectivity. The results suggest that SnO2-Co architectures can be used for detecting low concentrations of acetone and have potential for early diabetes diagnosis.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Engineering, Environmental
Jie Hu, Xueqing Xiong, Wangwang Guan, Haizhu Long
Summary: In this study, a PdO@WO3 core-shell, p-n heterojunction structure was successfully fabricated and showed superior acetone sensing performance. The sensing mechanism of the new structure was preliminarily discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Yong -ping Cui, Ya-ru Shang, Rui-xia Shi, Quan-de Che, Jun-peng Wang
Summary: In this study, NiWO4/WO3 nanotubes and Pt-decorated NiWO4/WO3 nanotubes were synthesized, and it was found that Pt@Ni/W nanotubes showed the highest sensitivity and selectivity towards acetone.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Physical
Jinniu Zhang, Tingting Shao, Juntang Dong, Gang Li, Jia Liu, Yumeng Liu, Ruyi Yang, Jianzhi Gao, Lu Li, Yanmin Jia, Lizhai Zhang, Hongbing Lu
Summary: In this study, mesoporous PtO-WO3 nanofibers were constructed using a facile one-step electrospinning technique for highly sensitive and selective acetone sensing. The effective immobilization of well-dispersed PtO nanocatalysts within the mesoporous WO3 NFs allowed for efficient catalysis and gas diffusion, enhancing the interaction between active O2- and acetone molecules. The PtO-WO3 NFs exhibited significantly improved acetone sensing properties compared to pure WO3 NFs, with a 6.5-fold higher response to 100 ppm acetone at 260 degrees C. The mesoporous WO3 NFs with uniformly distributed PtO nanocatalysts showed great potential for detecting acetone.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Hun Ji Choi, Jae-Ho Chung, Ji-Wook Yoon, Jong-Heun Lee
Summary: The study introduces a novel breath acetone sensor made of Nb-doped WO3, which exhibits high selectivity and sensitivity in detecting acetone, with fast response time, low detection limit, and the ability to monitor the efficiency of a ketogenic diet.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Psychology, Clinical
Jinping Xu, Wenfei Li, Tongjian Bai, Jiaying Li, Jinhuan Zhang, Qingmao Hu, Jiaojian Wang, Yanghua Tian, Kai Wang
Summary: This study found that electroconvulsive therapy (ECT) can selectively induce structural plasticity of the amygdala and hippocampal sub-regions in patients with major depressive disorder (MDD), and these changes are associated with the antidepressant effects of ECT. Additionally, the volume of the hippocampus-amygdala transition area (HATA) can serve as a potential biomarker to predict the effectiveness of ECT.
PSYCHOLOGICAL MEDICINE
(2023)
Article
Chemistry, Inorganic & Nuclear
Huai-Dong Pan, Cui-E Wu, Jia-Hao Chen, Yan Li, Xiu-Qing Zhang, Qing-Hu Teng, Kai Wang, Fu-Pei Liang
Summary: A pair of 2D MOFs were synthesized using 2-hydroxyisophthalic acid as the ligand. They showed similar structural characteristics but had differences in coordination geometry and linkage between the building units.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Chemistry, Physical
Xiangwei Qu, Jingrui Ma, Pai Liu, Kai Wang, Xiao Wei Sun
Summary: This work investigates the voltage sweep behavior of quantum dot light-emitting diodes (QLEDs). It is found that red QLEDs with ZnMgO electron transport layer (ETL) experience a drop in efficiency under consecutive voltage sweeps, while devices with ZnO ETL show an increase in efficiency. The analysis reveals that the efficiency drop in ZnMgO devices is related to hole leakage mediated by trap states on ZnMgO nanoparticles. Furthermore, the hole leakage also causes rapid lifetime degradation of ZnMgO devices.
Article
Engineering, Electrical & Electronic
Emad Iranmanesh, Jucai Zhai, Congwei Liao, Zihao Liang, Yong Zhao, Hang Zhou, Shengdong Zhang, Charalampos Doumanidis, Anand Prakash Dwivedi, Kai Wang
Summary: This work presents a piezotronic n-p-n bipolar heterojunction transistor (PBJT) for low power AI-sound recognition. It consists of an organic polymer as Base and two inorganic piezoelectric semiconductor ZnO layers as Emitter and Collector, forming a vertically-stacked heterogeneous n-p-n BJT. The device can provide either current or voltage as an output signal and has demonstrated low frequency sound detection, mapping, and recognition using machine learning AI.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Chao Gao, Qi Yang, Yihong Qi, Tao Ma, Kuiren Su, Zhou Zhou, Xin Jin, Kai Wang
Summary: This paper reports on a photoelectric integrated device (PID) called dual photodiode-body-biased MOSFETs (PD-MOS) for eye-tracking applications. The CMOS-processed device exhibits low dark current, high gain, wide dynamic range, and low noise current, outperforming other types of photodetectors. It shows great potential for eye tracking in augmented reality, virtual reality, and mixed reality applications.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Xianda Zhou, Lei Lu, Yang Liu, Kai Wang, Yufeng Guo, Hanbin Ma, Jun Yu, Arokia Nathan, Johnny K. O. Sin
Summary: In the field of emerging heterogeneous power integration applications, power devices need to be fabricated on metal/glass/organics. Amorphous oxide semiconductors (AOSs) have become the dominant semiconductor material for low-temperature fabrication. The tradeoff between specific ON-resistance (R-ON,sp) and breakdown voltage (BV) in AOSs is discussed and found to be different from that in commonly used single-crystal semiconductors. An analytical model is developed to describe the unique dependence of carrier mobility on carrier concentration in AOSs, showing that R-ON,sp is proportional to BV4. Additionally, the use of a heavily doped drift region under a two-dimensional condition, such as reduced surface field (RESURF) condition, can resolve the issue of mobility degradation.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Energy & Fuels
Jiali Cao, Zhimin Fang, Shengzhong (Frank) Liu
Summary: By tailoring the Cs/Br ratio, three perovskites with a bandgap of 1.68 eV were systematically studied. It was found that Cs(0.3)FA(0.7)PbI(2.7)Br(0.3) exhibited the highest crystallinity, best-phase homogeneity, thermal stability, and achieved the highest efficiency of 20.17% with superior air, light, and thermal stability.
Article
Chemistry, Multidisciplinary
Tianqi Zhang, Pai Liu, Fangqing Zhao, Yangzhi Tan, Jiayun Sun, Xiangtian Xiao, Zhaojing Wang, Qingqian Wang, Fankai Zheng, Xiao Wei Sun, Dan Wu, Guichuan Xing, Kai Wang
Summary: This article introduces a method to enhance electron and hole injection in green InP QLEDs by introducing an electric dipole layer, which forms a strong electric field to facilitate efficient hole hopping, leading to an increase in external quantum efficiency and luminance.
NANOSCALE ADVANCES
(2023)
Article
Psychology, Clinical
Dandan Li, Long Zhang, Tongjian Bai, Bensheng Qiu, Chunyan Zhu, Kai Wang
Summary: This study aimed to investigate the modulatory effect of common variations in the oxytocin receptor gene (OXTR) on reward circuitry function and its relationship with empathy. Using functional connectivity and spontaneous local activity analyses in the nucleus accumbens (NAcc), the results showed that individuals with the rs2268493 TT genotype had lower functional connectivity between the NAcc and the medial prefrontal cortex (mPFC) as well as the inferior frontal gyrus (IFG). These findings suggest that common OXTR variations have a modulatory effect on the connection between the NAcc and the central hubs of empathic networks, providing insights into the neural basis of the modulatory effect of OXTR on empathic behavior.
PSYCHOLOGY RESEARCH AND BEHAVIOR MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Hang Su, Jing Zhang, Yingjie Hu, Yuying Yao, Xinxin Zheng, Yutong She, Binxia Jia, Lili Gao, Shengzhong (Frank) Liu
Summary: Based on theoretical calculations, it is found that enhancing the electrostatic potential of passivators can improve the passivation effect and adsorption energy between charged defects and passivators. Therefore, an electrostatic potential modulation (EPM) strategy is developed to design passivators for highly efficient and stable perovskite solar cells (PSCs). Through experiments, two designed passivators show good passivation effects, and the EPM strategy provides a principle for passivator design and allows passivation to be controllable, which may advance the optimization and commercialization of perovskite solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Huijing Liu, Huifang Han, Jia Xu, Xu Pan, Kui Zhao, Shengzhong (Frank) Liu, Jianxi Yao
Summary: A design using a 0D Cs4Pb(IBr)(6) additive is reported to transform the tensile stress into compressive stress in the perovskite film, effectively improving mechanical durability. Simultaneously, the additive enhances crystallinity and passivates defects, resulting in improved photovoltaic performance. This strategy paves the way for further improvement of the mechanical durability of all-inorganic flexible perovskite solar cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xu Guo, Xing Liu, Menglong Wang, Junqing Yan, Yubin Chen, Shengzhong Liu
Summary: In this study, the carrier dynamic kinetics of colloidal Co3O4 quantum dots-Pt hetero-junctions were investigated to understand the water reduction process in solar water splitting. It was found that the quantum confinement effect induced by the small QD size raised the conduction band edge position of Co3O4 QDs, enabling the ligand-to-metal charge transfer necessary for overall water splitting. These findings provide insights into the photocatalytic mechanism of Co3O4 catalysts and can guide the rational design of Co3O4-based photocatalytic systems.
Article
Chemistry, Multidisciplinary
Weikai Zhang, Mingxuan Du, Wenshan Xi, Huiping Zhang, Shengzhong Frank Liu, Junqing Yan
Summary: This study innovatively loaded Pt nanoparticles on oxygen vacancy-rich TiO2 (Pt/Vo-TiO2) in situ using a photocatalytic device, which showed a synergistic effect on the progress of the HER kinetics. Pt/Vo-TiO2 exhibited excellent electrocatalytic performance, providing a new strategy for designing highly efficient HER catalysts.
Article
Materials Science, Multidisciplinary
Yang Cao, Jiangshan Feng, Zhuo Xu, Lu Zhang, Junjie Lou, Yucheng Liu, Xiaodong Ren, Dong Yang, Shengzhong (Frank) Liu
Summary: A patching strategy using bifunctional trifluorophenylacetic acid (TFPA) was developed to improve the quality and stability of perovskite films, enhancing the efficiency of perovskite solar cells (PSCs). The power conversion efficiency (PCE) of PSCs with TFPA increased from 22.95% to 24.56%, and flexible PSCs with a high PCE of 22.65% were successfully fabricated. The devices with TFPA showed better long-term efficiency retention under continuous irradiation and storage in air.
Article
Materials Science, Multidisciplinary
Ming Chen, Xiaofeng Dong, Weidong Luo, Zhimin Fang, Zhicheng Shan, Shengzhong (Frank) Liu, Zhuo Xu
Summary: Organic-inorganic hybrid halide perovskites have attracted significant attention as photovoltaic materials due to their high solar cell performance and easy fabrication. However, their poor stability and toxicity of lead hinder their commercialization. This study proposes a series of lead-free quaternary thioiodide materials, showing suitable bandgaps, high permittivity, and good stability. Theoretical calculations confirm their potential as superior photovoltaic materials with efficient light absorption properties, with Sn2InS2I3 exhibiting a theoretical spectroscopic limited maximal efficiency of over 33%.
JOURNAL OF MATERIALS CHEMISTRY C
(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)
