Article
Nanoscience & Nanotechnology
Wei Zheng, Baoyu Sun, Yuemei Li, Rui Wang
Summary: This study introduces a new strategy for nanothermometry, utilizing the synergistic effects of Er3+ and inverse fluorescence intensity ratio in Gd2O3:Er3+,Yb3+ nanospheres to significantly enhance absolute sensitivity. Controllable tuning of sensitivity was achieved by adjusting Yb3+ concentration, while also maintaining outstanding signal discriminability.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Ceramics
Junhao Xing, Fei Shang, Guohua Chen
Summary: A novel Yb3+/Er3+ double doped glass ceramic material containing NaSrPO4 nanocrystals was synthesized and systematically studied for its up-conversion optical properties and temperature-sensitive performance. The material exhibited potential as optical temperature sensors based on its maximum relative sensitivity at 298 K and maximum absolute sensitivity at 573 K.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Junshan Hu, Ruonan Wang, Ziqian Wei, Xiao Wu, Fengyi Wang, Lixin Liu, Yanzhuo Li, Hao Fu, Qing-Hua Xu
Summary: Yb3+/Er3+ co-doped beta-Ba2ScAlO5 phosphors with strong red emission and temperature-dependent properties have been prepared through equivalent substitution strategy. The red-green integrated intensity ratio can reach up to 82.5, and the red emission mechanism mainly arises from energy transfer. The optimized doping concentrations of Yb3+ and Er3+ show linear relationship with temperature, indicating potential application in optical thermometry.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Xuan Tong, Xin Zhou, Xunze Tang, Yonggang Min, XiaoLong Li, Wenguang Wang, Yannan Qian
Summary: LiNbO3:Yb3+/Er3+ nanocubes with an average diameter of approximately 500 nm were applied in non-invasive optical temperature sensors for the first time. With increasing annealing temperature, the nanocubes exhibited a significant enhancement in upconversion emissions, indicating their potential application in optical thermometry.
Article
Chemistry, Inorganic & Nuclear
Jingjing Tang, Yujian Wu, Minkun Jin, YueXin Li, Changheng Chen, Jinmeng Xiang, Chongfeng Guo
Summary: In this study, a noncontact upconversion optical temperature sensor was developed and a flexible thin-film thermometer was fabricated for detecting the temperature of microelectronic components. The results showed stable emission and sensitivity of the sensor, indicating its potential to replace traditional thermometers.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yingzhu Zi, Yangke Cun, Xue Bai, Zan Xu, Asif Ali Haider, Jianbei Qiu, Zhiguo Song, Anjun Huang, Jialun Zhu, Zhengwen Yang
Summary: Negative lattice expansion-induced upconversion luminescence (UCL) thermal enhancement has been used to solve the thermal quenching problem of lanthanide ions and combined with traditional fluorescence intensity ratio technology for temperature sensing. Transparent glass ceramics of Na2MoO4:Yb3+, Er3+ were fabricated with linear negative thermal expansion, resulting in thermal enhancement of UCL. By combining the UCL characteristics of positive thermal expansion tellurite glass matrix and negative thermal expansion Na2MoO4:Yb3+, Er3+ nanoparticles, a novel glass ceramic temperature sensor with high sensitivity was developed. The potential of Na2MoO4:Yb3+, Er3+ transparent glass ceramics as a new generation of temperature sensors was demonstrated through excellent repeatability in cycle measurements.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Environmental
YunCheng Jiang, Ye Tong, SunYueZi Chen, WenNa Zhang, FangFang Hu, RongFei Wei, Hai Guo
Summary: A series of Ca2MgWO6:xEr3+, yYb3+ phosphor samples were synthesized through high temperature solid-state reaction method for optical thermometry. These samples showed intense up-conversion luminescence when excited by 980 nm laser, with enhanced emissions by addition of Yb3+ ions. The phosphors demonstrated a dual-mode temperature sensor and superior thermal stability, indicating potential applications for self-referenced optical thermometry.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Kamel Saidi, Mohamed Dammak, K. Soler-Carracedo, Inocencio R. Martin
Summary: In this study, Yb3+-Er3+ and Yb3+-Ho3+ co-doped Na3Gd(VO4)2 (NGVO) microparticles were synthesized using a citrate-based sol-gel method, allowing for temperature sensing in the visible region with high sensitivity. The NGVO:Yb3+/Ho3+ phosphors showed excellent thermal resolution in high-temperature environments, suggesting potential applications as safety signs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Jiaxuan Hu, Xing Zhang, Haihong Zheng, Fumin Lu, Xiusha Peng, Rongfei Wei, Fangfang Hu, Hai Guo
Summary: A novel sequence of Ba3-xSrxLu4O9: Er3+/Yb3+ phosphors was successfully prepared for investigating temperature sensing property. Energy transfer and lattice environment regulation significantly improved Er3+ up-conversion luminescence. Multi-mode optical thermometry exhibited superior temperature measurement performances in wide range, signal discriminability, sensitivity, and repeatability.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Weiguang Ran, Guangshi Sun, Xiaoli Ma, Zicheng Zhang, Tingjiang Yan
Summary: In this paper, Er3+/Yb3+ co-doped CdMoO4 phosphors were prepared and showed excellent green emission properties when irradiated with a laser at about 980 nm. The prepared phosphors exhibited excellent sensitivity to temperature in the range of 293 to 473 K for optical temperature sensors based on the fluorescence intensity ratio. The CdMoO4:0.02Er(3+),0.08Yb(3+) sample achieved a maximum absolute sensitivity at about 473 K and a relative sensitivity of 1.631% K-1 at 293 K, making it suitable for non-contact optical temperature measurement.
DALTON TRANSACTIONS
(2022)
Article
Optics
Runfa Liu, Yue Pan, Jia Zhang, Xincui Zhuang, Yangbo Wang, Xufeng Zhou, Shanshan Du, Huaiyong Li, Wei Li
Summary: Two novel upconversion phosphors, Yb3+/Ho3+ co-doped BiOF and BiF3 microcrystals, were synthesized and investigated for their crystalline structure, room temperature and temperature-dependent upconversion properties. Under 980 nm laser excitation, both microcrystals exhibited characteristic emissions of Ho3+ with an identical green luminescent color, but the intensity was higher in BiF3:Yb/Ho microcrystals. The upconversion intensity and fluorescence intensity ratios of both microcrystals decreased regularly with increasing temperature, establishing a ratiometric thermometry. BiF3:Yb/Ho microcrystals demonstrated significantly superior thermometric performance, with a high relative sensitivity of 5.41% K-1 and a wide temperature sensing range of 298-673 K.
JOURNAL OF LUMINESCENCE
(2023)
Article
Nanoscience & Nanotechnology
Yujiao Zhou, Gilles Ledoux, David Philippon, Sylvie Descartes, Matteo Martini, Shaozhou He, Cedric Desroches, Didier Fournier, Catherine Journet, Laurence Bois
Summary: Photoluminescent temperature sensors based on gadolinium orthovanadate (GdVO4) doped with ytterbium and erbium were developed and dispersed in different media for temperature measurement. The luminescence intensity ratio of thermally coupled erbium emission peaks varies linearly with temperature and can be corrected for laser-induced thermal effects.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Murat Erdem, Hiimeyra Orucu, Selim Burak Canturk, Goniil Eryurek
Summary: The study shows that Yb3+/Er3+:gadolinium gallium garnet (GGG) nanocrystals exhibit white-light emission and optical thermometry properties at different crystal sizes, making them suitable for applications in light sources and optical temperature sensors.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Ceramics
Rui Yun, Jingqi He, Li Luo, Xiaohua Liu, Zhaogang Nie, Weiren Zhao, Hongli Wen
Summary: This study synthesized phosphors doped with Er3+, Yb3+, and Nd3+ in LiLn(WO4)2, with LiGd(WO4)2 material showing the most intense green emission under 785 nm excitation. The effects of different doping concentrations on luminescent properties and energy transfer among Nd3+, Yb3+, and Er3+ under 785 nm excitation were investigated.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Tao Pang, Yanyan Wu, Yujian Zhang, Ronghua Jian, Junwen Mao, Hong Wang, Hai Guo
Summary: This study demonstrates that the temperature effect on UC luminescence in NaGdF4:Nd3+/Yb3+/Er3+ nanocrystals is strongly dependent on the exciting wavelength. The UC luminescence shows good resistance to thermal quenching when excited using 808 nm radiation. The research provides a novel strategy for anti-thermal quenching of upconversion luminescence with potential applications in dynamic UC anti-counterfeiting, NIR-I-responsive thermometers, and nanoheating.
JOURNAL OF MATERIALS CHEMISTRY C
(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)