Article
Optics
Weidi Xia, Li Li, Peixin Yang, Faling Ling, Yongjie Wang, Zhongmin Cao, Sha Jiang, Guotao Xiang, Xianju Zhou, Yongbin Hua
Summary: A series of single and co-doped Sr8MgLa(PO4)(7) phosphors with Tb3+ and Eu3+ ions were successfully prepared, showing color-tunable performances and introducing dual-model optical thermometer techniques. The energy transfer mechanism between Tb3+ and Eu3+ was determined, and the sensing sensitivity was investigated, demonstrating the potential for dual-model thermometers.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
Ruitong Song, Zhiqin Yang, Hongzhi Zhang, Xiaoqin Tang, Yuxin Liu, Jing Zhu
Summary: To solve the problem of inefficient excitation of Eu3+-activated red phosphors at -365nm, a color-tunable phosphor Na3Ca4(TeO3)(PO4)3 (NCTP):Dy3+,Eu3+ was prepared using the energy transfer between Dy3+ sensitizer and Eu3+ activator. Under 363nm excitation, the luminous color was adjusted to red due to the efficient Dy3+-> Eu3+ energy transfer controlled by dipole-dipole interaction. Moreover, the introduction of Dy3+ sensitizers enhanced the structural rigidity and resulted in high luminescence thermostability.
CERAMICS INTERNATIONAL
(2023)
Article
Spectroscopy
Yanyan Li, Yanyan Zhou, Xiang Li, Haoyang Wu, Lei Zhao, Wenjie Wang
Summary: A novel color-adjustable phosphor Sr8MgCe(PO4)(7):Tb3+ was synthesized and characterized for its emission properties under different Tb3+ concentrations, showing potential applications in solid state lighting and temperature sensing with the largest sensitivity of 0.379% K-1 at a temperature range of 298-523 K.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Inorganic & Nuclear
Ci'an Xie, Lefu Mei, Yan-gai Liu, Ruiyu Mi, Haojun Yu, Xiaoya Bu, Jian Chen, Juyu Yang, Danyang Liu
Summary: Local structure modifications are crucial in regulating the photoluminescence properties of rare-earth ion-based phosphors. By synthesizing a series of solid solution phosphors with varied Ga/La ratios, controllable regulation of emission spectrum and thermal stability was achieved. The results indicate versatile potentials of these phosphors in various applications.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Wenke Ruan, Kangle Zhou, Huifang Lv, Zhiwei Yang, Mubiao Xie
Summary: A series of emission-tunable Ca9Ln(PO4)7:Eu2+/3+ (Ln = Y, La) phosphors were synthesized in a CO atmosphere, and their luminescent properties were investigated. The phosphors can be excited in the wavelength range of 245-475 nm, matching well with the n-UV chip. The emission colors of the phosphors can be tuned by varying the Eu ion concentration or excitation wavelength.
Article
Chemistry, Inorganic & Nuclear
Xiulan Wu, Xinlong Zhao, Qiang Ren, Liang Du, Mengkang Pei, Ou Hai
Summary: In this paper, a single-phase matrix phosphor with adjustable color emission and close color coordinates to standard white light emission was successfully prepared, showing potential application in the field of white-light LEDs.
Article
Optics
E. Annie Rathnakumari, S. Masilla Moses Kennedy
Summary: NSBP phosphors and rare earth ions doped were prepared through a solid state reaction method, with studies on phase identification and morphology characterization. Band gap of the host and doped phosphors were deduced, and spectral properties of Dy3+/Sm3+/Eu3+ doped and codoped NSBP phosphors were investigated, showing potential for warm white LED applications.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
Jiaming Deng, Zihao Wang, Weiping Zhou, Jiangen Min, Xunliang Jiang, Ziyan Xue, Chunlin Ma, Zhenzhi Cheng, Guangsheng Luo
Summary: This paper synthesized a series of Tb3+, Eu3+ single-doped and co-doped Ca2Al2SiO7 (CAS) phosphors using the sol-gel method. The luminescence color of CAS: Tb3+, Eu3+ phosphors can be tuned from purple-red to cool white and then to warm white by increasing the concentration of Tb3+ ions, due to the energy transfer of Tb3+ -> Eu3+. The CAS: Tb3+, Eu3+ phosphors show enhanced luminescence intensity for 404 nm emission and suppressed luminescence intensity for 616 nm emissions with rising temperature, indicating their potential in optical temperature sensing.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Julija Grigorjevaite, Arturas Katelnikovas
Summary: Inorganic luminescent materials that can be excited with NIR radiation and emit in the visible spectrum have gained scientific interest. This study reports the synthesis and optical properties of K2Gd(PO4)(WO4):Ho3+ and K2Gd(PO4)(WO4):20%Yb3+,Ho3+ powders. The samples were prepared by solid-state reaction, and it was observed that no concentration quenching was observed in K2Gd(PO4)(WO4):Ho3+ samples. However, adding 20% Yb3+ caused a decrease in Ho3+ emission intensity. Additionally, K2Gd(PO4)(WO4):20%Yb3+,0.5%Ho3+ sample showed high up-conversion emission stability and the red/green emission ratio increased with temperature, which could be used for temperature sensing.
Article
Chemistry, Inorganic & Nuclear
Wenke Ruan, Mubiao Xie, Qiaoli Yang, Limin Hu, Kangsheng Su
Summary: A series of single-phase white light-emitting phosphors Ca9Lu(PO4)(7):xEu(2+/3+) were successfully synthesized and their crystallization and optical properties were investigated. By adjusting the valence mixing of Eu2+/Eu3+ ions, the emission colors can change from blue-green to white and eventually to red.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
O. Shantajit Singh, Ranjoy Wangkhem, N. Shanta Singh
Summary: The hydrothermally synthesized Bi3+-sensitized Y2O3:Eu3+ phosphors were characterized, revealing efficient energy transfer from Bi3+ to Eu3+ ions through dipole-dipole interactions. The selection of excitation wavelength and Eu3+ concentration in Y2O3 can provide multicolor emission and white light emission. The maximum quantum yield of 24% was observed in Bi3+ (1 at%) sensitized Y2O3:Eu3+ (2 at%).
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Renping Cao, Rixing Liang, Lan Li, Ru Liu, Ting Chen, Bang Lan, Youcun Liu, Jing Wang, Chenxing Liao
Summary: In this study, Bi3+, Eu3+ singly doped and Bi3+/Eu3+ co-doped Ca9MgLi(PO)(7) (CMLPO) materials were synthesized by high-temperature solid-state method in air, and their luminescence properties were investigated. It was found that the emission color of the materials can be adjusted by changing the ratio between Eu3+ and Bi3+ ions. Co-doping Bi3+ ion as sensitizer significantly enhanced the luminescence intensity of CMLPO:Eu3+. The energy transfer process and luminous mechanisms were observed and analyzed. This research provides effective guidance for improving the optical properties of phosphors by co-doping other ions as sensitizers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Hua Chen, Yan Gao, Pengfei Jiang, Rihong Cong, Tao Yang
Summary: A systematic study was conducted on Bi3+ and Eu3+ doped borates, revealing the presence of two sets of emission and excitation spectra upon Bi3+ doping, and maximal Eu3+ emission intensity at y = 0.50 under charge transfer excitation. The Bi3+-to-Eu3+ energy transfer was supported by the steady photoluminescence spectra and the decreased lifetime of Bi3+.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Bin Yu, Yuchan Li, Ruiping Zhang, Hua Li, Yunjian Wang
Summary: A novel NBBP:xEu(3+) phosphor was synthesized and investigated for its composition, morphology, luminescence, thermal stability, etc., showing potential application in phosphor conversion white light-emitting diodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Crystallography
Julija Grigorjevaite, Arturas Katelnikovas
Summary: Scientists are studying new inorganic luminescent materials that can be excited with near-infrared radiation. These materials have various applications such as luminescent thermometers, bio-imaging agents, and anti-counterfeiting pigments. The authors report the synthesis and investigation of two series of K2Gd(PO4)(WO4):20%Tb3+ with different doping concentrations of Eu3+ and Yb3+. The optical properties of these materials, including reflection, excitation and emission spectra, fluorescence lifetime, and quantum efficiency, were studied using steady-state and kinetic spectroscopy.
Article
Materials Science, Ceramics
Guotao Xiang, Menglin Yang, Zhen Liu, Yongjie Wang, Sha Jiang, Li Li, Xianju Zhou, Li Ma, Xiaojun Wang, Jiahua Zhang
Summary: This study presents a high-sensitivity optical temperature measurement technology that enables precise temperature monitoring during photothermal therapy to prevent damage to normal cells. The nanorods studied have excellent temperature sensitivity and photothermal conversion capacity, making them highly promising for photothermal therapy and real-time temperature measurement.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Guotao Xiang, Menglin Yang, Zhen Liu, Yongjie Wang, Sha Jiang, Xianju Zhou, Li Li, Li Ma, Xiaojun Wang, Jiahua Zhang
Summary: This study successfully developed BaY2O4:Yb3+/Nd3+ as a photothermal therapy agent with real-time temperature sensing capability. The agent exhibits excellent photothermal conversion performance and can be used to destroy pathological tissues.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Qianyang Chang, Xianju Zhou, Sha Jiang, Guotao Xiang, Li Li, Yanhong Li, Chuan Jing, Faling Ling, Yongjie Wang, Peng Xiao
Summary: This study demonstrates an effective doping strategy using manganese (II) to achieve excellent dual-mode luminescence thermometry in CsPbCl3 quantum dots. By substituting Pb2+ with smaller Mn2+ ions, the photoluminescence quantum yield of QDs is significantly improved. The Mn2+-doped CsPbCl3 QDs show high relative sensitivity and repeatability as luminescence thermometers, providing a new approach for developing nano optical temperature sensing based on perovskite quantum dots.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Lei Zhong, Sha Jiang, Xihui Wang, Yanru Li, Yutong Wang, Jialiang Xie, Faling Ling, Yongjie Wang, Guotao Xiang, Li Li, Xianju Zhou
Summary: Self-calibrated temperature measurements combined with luminescence intensity ratio (LIR) and luminescence lifetime can improve the accuracy of temperature measurement. A dual-mode self-calibration optical thermometer based on CaNb2O6: Tb3+/Pr3+ phosphor was designed, which showed excellent sensitivity and potential application in different temperature ranges.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Xianju Zhou, Shouchun Zhao, Siyu Li, Yongjie Wang, Li Li, Sha Jiang, Guotao Xiang, Chuan Jing, Jingfang Li, Lu Yao
Summary: In this study, a series of NaLaCaWO6: Eu3+ phosphors were synthesized and their luminescence properties and optical thermometry performance were investigated. The results showed that these phosphors have potential applications as red phosphors for white light emitting diodes.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Zhaojie Wu, Li Li, Yongjie Wang, Faling Ling, Zhongmin Cao, Sha Jiang, Guotao Xiang, Xianju Zhou, Yongbin Hua, Jae Su Yu
Summary: A dual-mode optical thermometer utilizing a double-perovskite Mn4+/Sm3+ co-doped luminescent material was designed for precise temperature detection. The thermometer achieves accurate temperature measurement and high sensitivity through the fluorescence intensity ratio (FIR) and decay lifetime techniques.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xianju Zhou, Shouchun Zhao, Jie Zhang, Guotao Xiang, Sha Jiang, Li Li, Yongjie Wang, Yanhong Li, Chuan Jing, Lu Yao, Hongmei Yang, Zhen Wang
Summary: In this study, methamidine acetate and manganese divalent cation codoped CsPbCl3 quantum dots were synthesized. The results showed that these quantum dots exhibited improved optical performance, thermal stability, and thermal cyclability at high temperature. Additionally, their UV light and water stability were enhanced. Furthermore, the quantum dots were successfully applied in white LEDs with good color rendering index and correlated color temperature.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Weidi Xia, Li Li, Yongbin Hua, Faling Ling, Yongjie Wang, Zhongmin Cao, Sha Jiang, Guotao Xiang, Xianju Zhou, Jae Su Yu
Summary: This study synthesized Sr2InSbO6 phosphors with good temperature sensing performances and found that the optimal doping concentration was 3%, resulting in significant temperature sensitivities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Ye Jin, Xu Luo, Zhen Zhou, Rongxia Ran, Shuang Tan, Hong Lin, Fancheng Meng, Guotao Xiang, Li Ma, Xiao-jun Wang
Summary: SrLu2O4: Yb3+, Er3+ samples were prepared successfully using a solid-state method and exhibited up-conversion emissions. The up-conversion processes were found to be two-photon processes. The thermometric characteristics of the samples were investigated using fluorescence intensity ratio technology, and the sensor sensitivity was calculated.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Ye Jin, Zhen Zhou, Rongxia Ran, Shuang Tan, Yongfu Liu, Jinju Zheng, Guotao Xiang, Li Ma, Xiao-jun Wang
Summary: Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have promising applications in various fields. A novel NIR phosphor Ca2LuScAl2Si2O12:Cr3+ (CLSAS:Cr3+) is reported, which exhibits broadband emission and high internal quantum efficiency. It is used to fabricate NIR pc-LEDs for fast imaging of veins in human palm and fist, as well as night vision for objects.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Ceramics
Guotao Xiang, Menglin Yang, Yongxi Ding, Hongxiu Wu, Lu Yao, Yongjie Wang, Xianju Zhou, Li Li, Li Ma, Xiaojun Wang, Jiahua Zhang
Summary: In this study, CaSc2O4: Nd3+ nanorods were found to be an excellent optical thermometer based on the fluorescence intensity ratio (FIR). They exhibited superior sensitivity and temperature resolution, with a temperature increment of 7 K after laser radiation. These nanorods can be used for real-time temperature measurement in deep-tissue photothermal therapy.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Shuai Yang, Yongjie Wang, Guotao Xiang, Sha Jiang, Li Li, Faling Ling, Huanhuan Hu, Yuanyuan Zhang, Xianju Zhou, Andrzej Suchocki
Summary: The synthesis, structural, and luminescence properties of Cr3+-activated Al-2(WO4)(3) (AWO) and Sc-2(WO4)(3) (SWO) phosphors were investigated for potential application in pc-NIR LED. The compounds exhibited broadband NIR emission upon blue excitation, with the emission maxima and FWHM depending on the substitution of AlO6 with ScO6 octahedrons. The luminescence analysis revealed the importance of crystal field strength, Racah parameters, nephelauxetic effect, and electron-phonon coupling in determining the properties of the phosphors.
JOURNAL OF LUMINESCENCE
(2023)
Article
Optics
Lin Xiang, Xianju Zhou, Yongjie Wang, Li Li, Sha Jiang, Guotao Xiang, Chuan Jing, Jingfang Li, Lu Yao
Summary: An environmentally-friendly and low-cost Fe3+-activated ZnGa2O4 phosphor with intense broadband NIR emission was reported. The phosphor exhibited a wide emission band overlapping with the absorption of phytochromes, and maintained high luminescence intensity at high temperatures. LEDs made from this phosphor showed strong NIR emission, making it a promising material for indoor plant culture.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Hong Li, Li Li, Lingsong Mei, Yongbin Hua, Zhongmin Cao, Faling Ling, Yongjie Wang, Sha Jiang, Guotao Xiang, Xianju Zhou
Summary: By substituting Sb5+ with Mn4+ at the 2c position of the [SbO6] octahedron, the novel Sr2ScSbO6: Mn4+ (SSSO: Mn4+) phosphors exhibited a wide excitation band from 200 to 600 nm. A strong far-red emission peak was observed from the 2Eg -> 4A2g spin-forbidden transition under 345 nm excitation. The temperature-dependent emission spectra showed excellent thermal stability and the feasibility of using the phosphors for LED-based plant cultivation was examined. Additionally, the SSSO: Mn4+ phosphors demonstrated a high relative sensitivity for optical thermometry and the temperature-dependent decay curves were analyzed for sensing sensitivity.
CERAMICS INTERNATIONAL
(2023)
Article
Electrochemistry
X. H. Wang, X. Tang, T. T. Liu, Y. H. Li, F. L. Ling, C. Jing, L. Yao, X. J. Zhou, G. T. Xiang
Summary: In this study, a type-II homojunction was constructed by two carbon-rich polymeric carbon nitrides (CPCN) monolayer materials with different bandgaps and band-edges, which resulted in enhanced photo-rechargeable capacity and achieved a remarkable high record of 486 C g-1. The microstructure of the CPCN materials was characterized using XPS, NMR, UPS, and UV-Vis, and the photoelectrochemical properties of the CPCN monolayer and homojunction photoelectrodes were investigated using cyclic voltammetry (CV), Electrochemical impedance spectroscopy (EIS), and Mott-Schottky method.
ELECTROCHIMICA ACTA
(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)