Article
Chemistry, Multidisciplinary
Junyu Hong, Feilong Liu, Miroslav D. Dramicanin, Lei Zhou, Mingmei Wu
Summary: A series of Yb3+- and Er3+-doped Ca3Sc2Si3O12 (CSS) upconversion (UC) phosphors were synthesized by the sol-gel combustion method to develop novel luminescent materials for optical temperature measurement. The addition of Yb3+ greatly enhanced the emission of Er3+ by effective energy transfer. The prepared CSS:Yb3+,Er3+ phosphors exhibited green and red emissions corresponding to specific transitions of Er3+, and showed excellent temperature-dependent behavior with high sensitivity.
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
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
Chemistry, Multidisciplinary
Thimo S. Jacobs, Thomas P. van Swieten, Sander J. W. Vonk, Isa P. Bosman, Angela E. M. Melcherts, Bas C. Janssen, Joris C. L. Janssens, Matteo Monai, Andries Meijerink, Freddy T. Rabouw, Ward van der Stam, Bert M. Weckhuysen
Summary: This study investigates the local temperature variations in carbon dioxide methanation over a TiO2-supported Ni catalyst and links them to catalytic performance. Luminescence thermometry is used to measure the temperature-dependent emission and extract local temperatures. The findings highlight the importance of understanding and controlling temperature variations for optimizing catalyst performance.
Article
Optics
Aleksandar Ciric, Jovana Perisa, Ivana Zekovic, Zeljka Antic, Miroslav D. Dramicanin
Summary: This study overcomes the sensitivity limit of Boltzmann's thermometers by utilizing seven thermalized Dy3+ excited states in the Lu1.5Y1.5Al5O12 host. By extending the conventional two-thermalized level Boltzmann-type luminescence intensity ratio (LIR) to seven thermalized levels, the approach provides higher energy differences and enables a five times larger sensitivity than the conventional LIR.
JOURNAL OF LUMINESCENCE
(2022)
Article
Nanoscience & Nanotechnology
Diogo A. Galico, Muralee Murugesu
Summary: Modulating the optical properties of materials through structural modification allows for greater control towards applications. By tuning the inner core and outer shell of lanthanide-based nanosized molecular cluster aggregates, fine-tuning of optical properties is achieved. Controlling the composition and spacing of emitter ions results in enhanced ratiometric luminescence thermometry performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Glauco S. Maciel, Whualkuer B. Lozano, Yutao Xing, Nikifor Rakov
Summary: The study investigated the performance of neodymium-doped alkaline-earth fluoride crystalline powders for optical temperature sensing applications, revealing that near-infrared luminescence spectral profile of Nd3+ changes with temperature suitable for optical thermometry operation within the first biological window. Nd3+:CaF2 showed the highest thermometric sensitivity values, outperforming standard materials like beta-NaYF4 and competing with efficient oxide nanostructured materials. The use of thermometry data to understand structural properties through Judd-Ofelt intensity standard parameters was also discussed.
Article
Chemistry, Multidisciplinary
Diogo A. Galico, Muralee Murugesu
Summary: This study reports the use of a molecular cluster-aggregate containing 20 lanthanide ions to achieve Yb-III-Tb-III-based cooperative UC with a high upconversion quantum yield. Substituting Gd-III ions for Eu-III centers opens an energy transfer pathway, providing the first proof of concept of potential application for molecular UC.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Evgenii Yu. Kolesnikov
Summary: In this study, two types of dual-center Gd2O3:Tb3+/Eu(3+) nanophosphors are proposed for ratiometric thermometry within the temperature range of 123-473 K, providing temperature measurements with moderate relative thermal sensitivity and sub-degree temperature resolution. All studied thermometers demonstrate exceptional relative sensitivity exceeding the theoretical limit of sensors based on thermally-coupled levels.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Ilya E. Kolesnikov, Elena Afanaseva, Mikhail A. Kurochkin, Elena Vaishlia, Evgenii Yu Kolesnikov, Erkki Lahderanta
Summary: Luminescence thermometry has become a popular research field for real-time contactless temperature sensing. This study focuses on the development of a dual-center thermometer using LuVO4:Nd3+/Yb3+ thermal sensors. Two approaches were compared in terms of energy transfer efficiency, sensitivity, and temperature resolution.
Article
Optics
Jiujun Zhu, Peng Du, Jun Wang
Summary: A series of K0.3Bi0.7F2.4:Eu3+@xg-C3N4 composites were synthesized via self-assembly method, which exhibited multicolor emissions and good temperature sensing properties, making them promising candidates for optical thermometers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Shaoshuai Zhou, Wei Wang, Xiantao Wei, Min Yin
Summary: By employing a time-gated ratiometric thermometry technique, the temperature was measured based on the luminescence intensity ratio. Sm3+ doped material was used as the temperature responsive signal and reference signal. The experimental results showed high relative sensitivity and good temperature measurement performance within the investigated temperature range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Aiguo He, Zengzhe Xi, Wei Long, Pinyang Fang, Xiaojuan Li
Summary: The optical temperature sensing of Er3+/Yb3+-doped Pb(Sc1/2Nb1/2)O3 (PSN)-Pb(Mg1/3Nb2/3)O3 (PMN)-PbTiO3 (PT) crystal was investigated based on temperature-dependent upconversion luminescence. Different emission bands showed apparent differences in variation of luminescence intensity with temperature. Excellent relative and comparable absolute sensitivity were demonstrated based on different thermally coupled and nonthermally coupled levels. These findings have significant implications for the development of electric-optical integration in ferroelectric crystals.
Article
Engineering, Electrical & Electronic
Alexey A. Kalinichev, Aliia Shamsieva, Igor D. Strelnik, Elvira Musina, Erkki Lahderanta, Andrey A. Karasik, Oleg G. Sinyashin, Ilya E. Kolesnikov
Summary: Over the past decade, luminescence thermometry has become one of the fastest growing scientific areas, with many research groups working on designing highly sensitive and accurate thermometers. A study introduced a binuclear helical charged complex as a multimode optical thermometer, utilizing various temperature-dependent parameters for thermal sensing.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Ceramics
Fengya Hu, Yongjin Wu, Chengmei Sun, Chengcheng Xu, Bingjun Zhu, Qingru Wang, Qiang Shi, Shuhong Li, Dong Zhang
Summary: Eu3+ activated zinc titanate red-emitting phosphors were synthesized through a solid state reaction, with the addition of Li+ as a charge compensator to regulate the optical performances. The structure of samples showed temperature dependence at different synthesis temperatures, where higher calcination temperature improved particle crystallization. The surface morphology and element distribution were examined using SEM and EDS, and various elements were found to be evenly distributed within the matrix materials. Co-doping Li+ effectively enhanced the luminescence intensity of Eu3+, with the phosphor having 5 mol% and 7 mol% Li+ content exhibiting twice the luminescence intensity compared to the phosphor without Li+ at an annealing temperature of 600 degrees C. The influence of Li+ on the photoluminescence performance decreased with increasing annealing temperature, while the sample annealed at 1000 degrees C showed the highest relative sensitivity of 0.65%/K, unaffected by the Li+ dopants.
CERAMICS INTERNATIONAL
(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)