Article
Optics
Forough Jahanbazi, Xianli Wang, Yuanbing Mao
Summary: By combining Tb3+ and Mn3+ ions with different thermal behaviors, La2Zr2O7:Tb3+,Mn3+ nanoparticles achieved high thermometric sensitivity for optical thermometry. The emission intensity ratio of Tb3+ to Mn3+ over a temperature range showed maximum relative sensitivity of 1.82%·K-1 with minimal uncertainty, proving the promising potential of these dual activators for ratiometric optical thermometry.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Qincan Ma, Ning Guo, Jing Wang, Baiqi Shao, Yanmei Xin, Ruizhuo Ouyang
Summary: This study discusses the relationship between thermal quenching performance and energy gap, and adjusts the thermal quenching activation energy by controlling the ion ratio and ligand structure. It proposes a new method for designing fluorescent powder materials with adjustable thermal quenching activation energy.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Engineering, Environmental
Luyao Pu, Yu Wang, Jiaoyin Zhao, Minkun Jin, Leipeng Li, Panlai Li, Zhijun Wang, Chongfeng Guo, Hao Suo
Summary: A facile hydrothermal method was developed to construct monodispersed candy-like NaY(MoO4)2:Yb3+/Nd3+ micro-thermometers, which exhibited efficient near-infrared anti-stokes luminescence. By leveraging active lattice phonon and phonon-assisted Yb3+ -> Nd3+ energy transfer, the luminescence intensity was greatly enhanced with high sensitivity and resolution for multi-mode thermometry.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Chaoqing Yang, Dimitrije Mara, Joydeb Goura, Flavia Artizzu, Rik Van Deun
Summary: Lanthanide hydrogen-bonded organic frameworks (LnHOFs) are a versatile class of multicomponent luminescent materials with potential applications in optics and photonics. PHTF:Eu, a trivalent europium (Eu3+) incorporated polymeric hydrogen-bonded triazine frameworks, exhibits intense red luminescence with high color purity. PHTF:Eu also functions as a self-referencing thermometer in the cryogenic temperature range.
Article
Optics
Jiawen Wang, Nan Chen, Junyi Li, Qingyang Feng, Ruoshan Lei, Huanping Wang, Shiqing Xu
Summary: The study prepared double perovskite Pr3+: LiLaMgWO6 phosphors and discussed their luminescence properties. A high-sensitivity temperature sensing method was found using the fluorescence intensity ratio between different transitions. The material showed promising results for temperature sensing applications.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Multidisciplinary
Junhao Xing, Feng Luo, Yaoyi Qin, Xiaolu Chen, Yingying Liang, Zhixin Gao, Fei Shang, Huarui Xu, Guohua Chen
Summary: Multifunctional BaNb2O6:Yb3+/Er3+/Tm3+ transparent glass-ceramics were successfully prepared, demonstrating excellent optical and electrical properties, making them promising for temperature sensors and transparent electronic devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Jiantong Wang, Bowen Wang, Yuhan Teng, Changshuai Gong, Xuyan Xue, Xuejiao Wang, Ji-Guang Li
Summary: A novel K3(Y0.88Yb0.10Er0.02)Si2O7 phosphor was synthesized and investigated for its up-conversion luminescence and optical thermometric performance. The phosphor exhibited strong green UC emission and could sense temperature through fluorescence intensity ratio (FIR) and fluorescence lifetime (FL) modes. The maximum absolute sensitivity (SA) and relative sensitivity (SR) were higher than previous studies, with SA = 156 x 10-4 K-1 (I531/I555, 298 K) and SR = 1.80% K-1 (I519/I555, 298 K) via the FIR mode, and SA = 661 x 10-4 K-1 (548 K) and SR = 9.77% K-1 (298 K) via the FL mode.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Feifei Duan, Lei Wang, Qiufeng Shi, Haijie Guo, Jianwei Qiao, Cai'e Cui, Ping Huang
Summary: This study elucidates an innovative approach for enhancing the thermal stability of luminescent materials doped with Eu3+ ions. The results show that the thermal stability of Eu3+ ions can be remarkably improved by selecting the appropriate excitation wavelength. The development of a La2CaSnO6:Eu3+,Mn4+ temperature probe with reverse thermal quenching of Eu3+ ion luminescence is also explored, demonstrating its potential for non-contact temperature sensing applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
Lixin Peng, Leipeng Li, Feng Qin, Changwen Wang, Zhiguo Zhang
Summary: In recent years, the development of optical thermometry has attracted researchers' interest due to its advantages of non-contact and non-invasive temperature measurement. This study successfully constructed a multi-mode optical thermometer based on the luminescent properties of YVO4: Eu3+ phosphor, and evaluated different temperature measurement strategies. The results showed that the strategy based on the luminescence of the host material had the best sensitivity and temperature uncertainty.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Junbei Wang, Xianju Zhou, Guotao Xiang, Sha Jiang, Li Li, Yongjie Wang, Yanhong Li, Chuan Jing, Lu Yao, Hongmei Yang, Yanhao Huang, Feng Wang
Summary: In this study, we report and explain an abnormal thermal quenching phenomenon, which is expected to solve the low sensitivity problem of temperature-sensing materials and applications at high temperatures.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Ceramics
Ligan Ma, Fumin Lu, Qingqing Yu, Peican Dai, Fangfang Hu, Hai Guo, Rongfei Wei
Summary: Nowadays, multi-mode luminescent thermometry has emerged as a strongly promising noncontact temperature-sensing technique. In this study, three-mode optical thermometry techniques were successfully designed using thermochromic Gd2GaSbO7 (GGS):Bi3+,Eu3+ phosphors. The GGS:Bi3+,Eu3+ phosphors showed remarkable variation in emission color with temperature, and the fluorescence intensity ratio of Bi3+ and Eu3+ provided outstanding relative sensitivity and temperature uncertainty. These discoveries suggest that GGS:Bi3+,Eu3+ phosphors have great potential in multi-mode temperature detection and high temperature warning areas.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Alfredo M. Aguilar, Ezequiel L. Saidman, Maria V. Rosato-Siri, Luciano Marpegan, Eduardo D. Martinez
Summary: This article introduces a method using Er3+-doped upconversion nanoparticles to measure heat at the microscale and discusses critical aspects of the technique. The experimental results show that this method achieves high temperature resolution, spatial resolution, and temporal resolution, making it applicable for characterizing different thermally active systems.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Bin Zhao, Yuqi Chen, Yu Xue, Qinan Mao, Gongxun Bai, Meijiao Liu, Jiasong Zhong
Summary: Researchers have successfully designed a new type of tunable spectrum bismuth-doped phosphor material for high-sensitive optical temperature sensors. The emission position of this material can be controllably shifted from 475 to 462 nm by adjusting the doping concentration of europium ions. In addition, controlled luminescence from blue to red can be achieved through the design of bismuth to europium energy transfer, highlighting the multiplicity of applications in non-contact temperature measurement and white LED.
MATERIALS & DESIGN
(2023)
Review
Optics
Aleksandar Ciric, Miroslav D. Dramic
Summary: This article reviews the effects of temperature changes on luminescence and provides advanced and user-friendly software for fitting experimental data and calculating figures of merit for luminescence thermometry.
JOURNAL OF LUMINESCENCE
(2022)
Article
Nanoscience & Nanotechnology
Ilya E. Kolesnikov, Daria Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Gongxun Bai, Evgenii Yu Kolesnikov
Summary: Single doped CaWO4:Er3+ phosphors were synthesized and studied for optical thermal sensing within a wide temperature range. The ratiometric strategy using two luminescence intensity ratios improved thermometric characteristics and expanded the working temperature range. The thermometric performances of the samples were evaluated, and it was found that LIR1 had high sensitivity while LIR2 provided more accurate thermal sensing. The results indicate that CaWO4:Er3+ phosphors have potential in dual-mode thermal sensing.
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)