Article
Optics
Siti Aisyah Abdul Wahab, Khamirul Amin Matori, Mohd Hafiz Mohd Zaid, Mohd Mustafa Awang Kechik, Nuraidayani Effendy, Rahayu Emilia Mohamed Khaidir
Summary: This article reports the fabrication and characterization of Zn2SiO4:Co2+ using different concentrations of Co3O4 as a dopant. The results showed that the dopant incorporation led to bluer emission and increased density. XRD analysis confirmed the stable state of willemite phase, while optical absorption and photoluminescence spectroscopy revealed the presence of distinct absorption bands and emission peaks. The study also demonstrated the potential to produce blue emissions using Zn2SiO4:Co2+ samples.
Article
Materials Science, Multidisciplinary
Jian Tang, Xingui Dong, Junhao Xing, Yongfeng Tang, Lina Qin, Fei Shang, Guohua Chen
Summary: In this work, Tm3+/Dy3+ co-doped BaO-B2O3-P2O5-Na2O glass was prepared and NaBaPO4 glass-ceramics were obtained by heat treatment. The results showed that the transmittances of the glass and glass-ceramic in the visible light range were 90% and 80% respectively, and the emitting color could be adjusted by changing the ion concentrations.
Article
Thermodynamics
P. Nandi, M. Goswami, A. Arya, M. Krishnan
Summary: CeO2-doped Y2O3-Al2O3-SiO2 (YAS) glass composition was synthesized and devitrified to a single phase Ce:YAG glass-ceramics phosphor. The surface roughness was found to increase nucleation and accelerate crystallization in the glass-ceramics layer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Ana P. Lourenco, Rima Tedjini, Ricardo Martins, Luis F. Santos, Rui M. Almeida
Summary: A series of lanthanide-doped aluminosilicate glasses were prepared using sol-gel processing. The study focused on optimizing these glasses for white light generation and their potential use as white LED materials. Undoped aluminosilicate glass and titania multilayers were also synthesized to enhance light emission within the white light spectrum. Up-conversion excited at 980 nm was used to generate white light, and the materials were characterized using various spectroscopic techniques.
Article
Materials Science, Ceramics
Sihao Wang, Yunlan Guo, Yadong Lu, Chao Liu, Zhao Deng, Na Han, Jiedong Cui
Summary: Transparent glass-ceramics with Zn2TiO4 and/or alpha-Zn2SiO4 nanocrystals exhibit increased Vickers hardness, attributed to structural and compositional modifications induced by the precipitation of these nanocrystalline phases, which facilitate K-Na ion-exchange, resulting in enhanced depth of layer and improved hardness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Hao Xu, Wei Zhu, Mingliang Tang, Xiangyuan Wang, Yin Zhang
Summary: This study investigated a multi-component oxide glass consisting of 50B(2)O(3)-(25-x)Al2O3-10Na(2)O-xBi(2)O(3)-15CaF(2)-0.5Dy-0.5Eu (x = 0 , 5 , 10 , 15 , 20 , 25 mol%). The fluoroborate glass exhibited non-crystallinity, as confirmed by X-Ray diffraction. FTIR spectra revealed the structural properties of the glass, characterized by the stretching and vibrating groups of various boric groups. The optical band gap measurements confirmed the presence of unbridged oxygen (NBOs) in the glass samples. The refractive index of the fluoroborate glass increased with the Bi2O3 content, and the glass exhibited strong emission in the blue, yellow, and red range. The emission spectra were analyzed to calculate chromaticity coordinates, color temperature, color rendering index, and color purity. By adjusting the Bi2O3 content and excitation wavelength, the glass was able to emit white light, making it suitable for white light-emitting diodes (WLEDs).
MATERIALS TODAY CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Qianwen Wang, Xinmin Yu, Wuyunga Bao, Tong Wang, Hongbo Zhang, Chunhui Su
Summary: Tm2O3-Tb4O7-Sm2O3 tri-doped glass ceramics with eulytite-type structure were prepared by melt-annealing and crystallization. The crystallization can be controlled by adjusting the heat treatment temperature or time. XRD Rietveld analysis revealed the doping of rare earth ions into the Ba3Gd(PO4)3 lattice. The optical band gap values of the glass ceramics decreased significantly after heat treatment. Energy transfer from Tm3+ and Tb3+ to Sm3+ was confirmed by emission spectra and decay curves, and white light emission was achieved by adjusting the doping concentration of Sm2O3. The maximum relative sensitivity (Sr) was calculated to be 2.36% K-1 based on the temperature-dependent properties of the fluorescence intensity ratios of Sm3+/Tm3+ and Sm3+/Tb3+. The results suggest that Tm2O3-Tb4O7-Sm2O3 tri-doped glass ceramics can be potential materials for w-LEDs and optical temperature measurement.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Hansol Lee, Jinju Lee, Woon Jin Chung, Won Bin Im
Summary: An oxyfluoride glass-ceramic containing Eu2+-doped nepheline and LaF3 crystals was synthesized to enhance its color conversion and quantum efficiency under UV-LED excitation. By replacing Al2O3 with LaF3, the emission intensity and PL-QY were improved. XRD was used to monitor the structural changes in the crystals. A high CRI white LED was successfully demonstrated using the modified glass-ceramic as a color converter.
Article
Materials Science, Multidisciplinary
Junhao Xing, Zhixin Gao, Ying Luo, Fei Shang, Guohua Chen
Summary: In this paper, Tb3+/Eu3+ co-doped P2O5-B2O3-ZnO-CaF2 glasses and glass ceramics were fabricated, and the structure, luminescence, and temperature sensing characteristics were studied. The crystal phase precipitated in the glass was identified as calcium Ca5(PO4)3F. The temperature sensing behavior in the range of 403-753 K was determined based on the fluorescence intensity ratio of the emission bands of Eu3+ and Tb3+. The glass and glass ceramics showed promising sensitivity for optical thermometry.
Article
Materials Science, Ceramics
Xiaobo Li, Chunli Fan, Jianhui Li, Shu Guo, Jing Ren, Jun Wang
Summary: The research focuses on the preparation of high crystallinity transparent glass ceramics (TGCs) by controlled crystallization from a cost-effective quaternary glass system. The TGCs obtained have a high crystallinity of 85% and exhibit transparent properties in the visible light region. The TGCs also show broadband/multiplexed and enhanced luminescence, making them promising materials in photonics and optoelectronics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
S. Ling, F. B. Xiong, W. B. Yang, H. F. Lin, W. Z. Zhu
Summary: Novel red-emitting phosphors Sr7Sb2O12: Sm3+ and Sr7Sb2O12: Sm3+, Eu3+ were synthesized and characterized. Energy transfer between Sm3+ and Eu3+ ions in Sr7Sb2O12 was achieved with a transfer efficiency of 42.4%. The phosphor exhibited good thermal stability and produced white light when combined with near-UV or blue chips in LED lamps.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Claire Mevel, Julie Carreaud, Celine Caillaud, Francesco Bour, Gaelle Delaizir, Victor Castaing, Bruno Viana, Pierre Carles, Francois Brisset, Cecile Genevois, Mathieu Allix, Sebastien Chenu
Summary: This study reports on the elaboration of translucent ZnGa2O4 ceramics through an innovative process. The researchers used the lixiviation of glass-ceramics to obtain ZnGa2O4 nanocrystals, which were then sintered into bulk ceramics using Spark Plasma Sintering (SPS). Despite the slightly lower transmittance compared to the theoretical value, these results are promising and open up new possibilities for transparent ceramic processing.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Katy S. Gerace, Clive A. Randall, John C. Mauro
Summary: Glass-ceramics display thermal stability and mechanical properties, and also possess symmetry-dependent properties such as piezoelectricity and pyroelectricity through controlled crystallization. This study investigates the crystallization of LiNbO3 and NaNbO3 in two different compositions and analyzes the kinetics using the JMAK theory. The addition of Na2O accelerates the crystallization of LiNbO3 and reduces the activation energy. Time-temperature-transformation diagrams reveal the optimal transformation temperature for LiNbO3 and NaNbO3.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Siti Aisyah Abdul Wahab, Khamirul Amin Matori, Sidek Hj Ab Aziz, Mohd Hafiz Mohd Zaid, Mohd Mustafa Awang Kechik, Idza Riati Ibrahim, Mohammad Zulhasif Ahmad Khiri, Nuraidayani Effendy, Muhammad Najibudin Abu Bakar
Summary: The fabrication and characterizations of Co2+ doped Zn2SiO4 using recycled waste white rice husk ash were reported for the first time. The Co2+ doped Zn2SiO4 exhibited blue and green emission properties, making it a potential material for various applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Cheong Wei Mun, Loh Zhi Wei, Mohd Hafiz Mohd Zaid
Summary: The melt-quenching method was employed to produce Co3O4-doped ZnOSLS, which was later heat-treated to form Zn2SiO4 glass-ceramics. The study revealed that the optical energy band gap decreased with increasing heat treatment duration, making it suitable for application as a blue phosphor in optoelectronic devices.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Applied
Xiuming Mei, Xiaoxiao Wu, Fan Zhou, Yanrong Liu, Hanxu Ji, Yufeng Li, Diyao Jiang, Miao Yang, Jingjing Xu, Yuwei Qiang, Can Wang, Yu Zhang, Chi Zhang
Summary: This study used headspace solid-phase microextraction coupled with headspace GC-tandem mass spectrometry (HS-SPME-GC-MS) to screen volatile substances in infected wheat and selected a chemical marker for disease determination. Two analytical methodologies, HS-SPME-GC-MS and headspace gas chromatography with flame ionization detection (HS-GC-FID), were established to determine the trimethylamine (TMA) content. The HS-SPME-GC-MS method showed excellent sensitivity and allowed for the determination of 0.05% infected kernels among whole wheat grains.
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
(2023)
Article
Chemistry, Physical
Jinjing Ma, Lei Lei, Yubin Wang, Shiqing Xu
Summary: Metal halide perovskite nanoparticles show potential in X-ray detection and imaging, but they have poor stability. In this study, composites of CsPbBr3 nanoparticles and BaLuF5:15Gd/15Tb nanoparticles were used to prepare a scintillation film, resulting in improved scintillation intensity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hao Li, Yingjie Zhao, Ilya Kolesnikov, Shiqing Xu, Liang Chen, Gongxun Bai
Summary: This study successfully developed rare earth ions-doped Ba2LaF7 nanocrystals as the core material in a multi-functional system for photothermal therapy. Optical temperature measurement based on fluorescence intensity ratio improved sensitivity, and the nanocrystals showed a good photothermal response to laser pumping power and could be used for photothermal imaging.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Spectroscopy
Dingchen Tang, Ying Tian, Dominik Dorosz, Xu Wang, Xueying Yang, Yongyan Liu, Xianghua Zhang, Junjie Zhang, Shiqing Xu
Summary: In this paper, Ho3+/Yb3+ co-doped chloride-modified fluorotellurite glasses with 2-3 μm mid-infrared luminescence were prepared and their optical properties were investigated. The glasses showed high transmittance and low phonon energy, and the mid-infrared fluorescence intensity was enhanced by energy transfer. The calculated emission cross-section and quantum efficiency indicated the potential application of the glass in mid-infrared fiber laser research.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Geosciences, Multidisciplinary
Rui Zhang, Mei Yuan, Bobo Li, Zhaoping Li, Qing Lv, Shiqing Xu
Summary: In this study, the effect of acidification on the wettability and adsorption characteristics of anthracite coal was investigated. It was found that acid modification can enhance the wettability of coal samples and reduce their adsorption capacity for coalbed methane. This research has significant implications for improving the efficiency of coalbed methane extraction.
NATURAL RESOURCES RESEARCH
(2023)
Article
Chemistry, Physical
Yuhan Qin, Xianpeng Fu, Yuan Lin, Zheng Wang, Jie Cao, Chi Zhang
Summary: This study proposes a self-powered IoT sensing node based on a triboelectric nanogenerator (TENG) for sustainable environmental monitoring. The TENG, powered by wind energy, converts weak electrical energy into a stable direct current (DC) 2.5V voltage to operate the IoT sensing node. The node can activate when the storage energy exceeds 4.4V, and the monitoring data is transmitted to the IoT cloud platform using narrowband IoT (NB-IoT) module. This work offers a universal strategy for sustainable IoT sensing nodes powered by environmental micro-nano mechanical energy, with potential applications in IoT, big data, and environmental monitoring.
Article
Chemistry, Physical
Haobin Wang, Shuyi Huang, Haoze Kuang, Chi Zhang, Yulu Liu, Kaihang Zhang, Xinyu Cai, Xiaozhi Wang, Jikui Luo, Zhong Lin Wang
Summary: Triboelectrification between metals, polymers, and semiconductors was investigated, revealing a universal mechanism involving both electrostatic induction and dynamic junction modulation. The outputs of triboelectrification exhibited four current/voltage peaks, two of which were attributed to electrostatic induction effects and determined by surface state densities and electron affinity differences between the materials. The other two peaks were associated with dynamic junction modulation effects and determined by charging exchange between surface states and depletion regions. While metals and polymers showed no modulation of depletion regions, only the peaks induced by electrostatic induction were observable. Semiconductors, on the other hand, exhibited additional peaks induced by junction modulation when in contact with any material type. These findings provide valuable insights for developing high-performance triboelectric nanogenerators.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Sicheng Dong, Tianzhao Bu, Zhaozheng Wang, Yuan Feng, Guoxu Liu, Jianhua Zeng, Zhihao Wang, Jie Cao, Zhi Zhang, Feng Liu, Chi Zhang
Summary: A freestanding-mode TVNG (FTVNG) based on metal, p-Si, and n-Si is proposed, which can generate opposite DC outputs by rubbing against p-Si and n-Si, enabling energy harvesting from moving objects without attached wires. The electrical output characteristics and influence laws of the tribovoltaic effect are studied under different working parameters. FTVNG is integrated into a traditional rolling bearing, demonstrating its application potential in basic components and parts.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Songtao Hu, Tianyu Han, Youchao Qi, Chi Zhang, Xi Shi, Zhike Peng
Summary: In this study, a self-sensing solution is proposed using triboelectric nanogenerators (TENGs) as self-aware measurement points in a multi-span rotor system. Deep learning is employed to analyze the triboelectric current signals, and ResNet 18 is found to be effective in extracting feature patterns for misalignment fault identification with a diagnostic accuracy of 90.28%. This is the first demonstration of TENGs for misalignment fault identification in a multi-span rotor system, providing a promising approach for health condition monitoring.
Article
Chemistry, Physical
Songtao Hu, Xijia Ding, Beibei Fan, Chi Zhang, Bo Zhang, Xi Shi, Zhike Peng
Summary: This study reports a solid-liquid triboelectric nanogenerator (TENG) sensing technique for position sensing of inkjet printing. A self-aware array assembled by four single-electrode-mode TENG units can achieve droplet positioning based on the triboelectric output. The open-circuit voltage is considered as the key index to precisely characterize the deposition positioning of jetting droplets.
Article
Chemistry, Multidisciplinary
Le Wang, Gongxun Bai, Peng Xue, Shuqin Zhang, Liang Chen, Shiqing Xu
Summary: Radiation cooling technology plays an important role in reducing energy transmission, alleviating urban heat island effect, and saving energy. This study prepared red and orange materials with excellent performance through green synthesis method and fabricated colored films, which can effectively reduce the surface temperature of buildings.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yifan Wang, Zhengwei Lu, Peipei Wen, Yinyan Gong, Can Li, Lengyuan Niu, Shiqing Xu
Summary: Crystal facet engineering is an effective strategy to regulate the orientations and electrochemical properties of metal oxides. This study successfully synthesized alpha-MnO2 nanorods with different exposed facets and showed that {110} and {310} facets exhibited higher pseudocapacitances due to their stronger adsorption capacity and lower diffusion barriers.
Article
Optics
Zhaojing Kuang, Mingshuang Guan, Mengli Gao, Jiaming Pan, Shiqing Xu, Junjie Zhang
Summary: Perovskite quantum dots (QDs) have remarkable optical properties, but their photoluminescence performance and stability still need improvement. In this study, CsPbBr3 QDs glass with high photoluminescence quantum yield and excellent hydro-stability was developed through a high temperature fusion process and subsequent heat treatment. The addition of CaO was found to promote the precipitation and growth of QDs by loosening the glass structure and facilitating atomic migration and reorganization. The research also provided insights into the relationship between network structure and CsPbBr3 QDs crystallization.
JOURNAL OF LUMINESCENCE
(2024)
Article
Chemistry, Multidisciplinary
Huirong Zou, Minghao Yi, Shiqing Xu, Lei Lei
Summary: Compared with commercial bulk scintillators and halide perovskites, lanthanide-doped fluoride nanoscintillators (NSs) exhibit high photochemical stability, low bio-toxicity and tunable emissions. By using a facile rapid room-temperature reaction method, lanthanide-doped NaBiF4 NSs with a hollow structure, strong scintillation intensity and ultra-weak afterglow were successfully prepared. The incorporation of different ions can enhance or decrease the scintillation intensity and achieve high spatial resolution.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Haolin Yang, Anshuo Zhang, Hai Guo, Denghao Li, Shiqing Xu, Lei Lei
Summary: This study proposes an effective strategy to significantly enhance the upconversion (UC) intensity of nanoparticles (NPs) by constructing local energy clusters. By increasing the doping concentrations and reducing energy loss, UC efficiency is greatly improved. In addition, the formation of energy clusters within the crystal lattice also changes the relationship between UC intensity and temperature, resulting in enhanced temperature sensing performance.
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)
