Article
Chemistry, Physical
Xiao Liu, Siqi Shi, Kai Yang, Liang Chen, Degang Deng, Shiqing Xu
Summary: SrGa2B2O7: Bi3+, Eu3+ phosphors were successfully synthesized through high temperature solid-state method, with their structure, luminescent characteristics and temperature sensing properties studied. The phosphors exhibited high absolute and relative temperature sensitivity, making them a promising optical thermometric material for temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Xiuying Tian, Jingliang Li, Huiyan Sheng, Ting Li, Lejia Guo, Changyan Ji, Zhi Huang, Jin Wen, Xin Liu, Chunyan Li, Jing Li, Yangxi Peng
Summary: The photoluminescence and temperature sensitivities of Ca3Y2Si3O12:Pr3+ thermophosphors with silico-carnotite structure were investigated, showing promising potential in the field of optical thermometry.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Wang Chen, Minkun Jin, Yuexin Li, Changheng Chen, Jinmeng Xiang, Zexun Li, Chongfeng Guo
Summary: In this study, an all-inorganic rare-earth halide double perovskite Cs2NaErCl6: Yb3+ (CNEC: Yb3+) phosphor was synthesized, which exhibited high sensitivity and multi-mode temperature measurement properties under excitation at 980 nm, making it suitable for monitoring local hot spots in electronic components.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Liting Qiu, Peng Wang, Xiantao Wei, Fengfeng Chi, Yonghu Chen, Min Yin
Summary: SAMIX phosphor, a mixture of Cr3+-doped and Tb3+-doped phosphors, demonstrates temperature-dependent luminescence properties for Tb3+ and Cr3+, with a strong influence of temperature on the lifetime of Cr3+. The fluorescence intensity ratio technique based on Tb3+ and Cr3+ exhibits high sensitivity for temperature sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Weihao Wang, Quanfeng Li, Liyan Chen, Yanhui Wang, Rubing Zhong, Huiwan Dong, Yijun Qiu, Yifan Hu, Xiulian Zhang
Summary: The Ba2LaNbO6: Mn4+ phosphor was synthesized and its crystal structure was characterized. The luminescent spectra were used to calculate the values of Dq, Racah parameters B and C, and the nephelauxetic effect parameter beta(1) of Ba2LaNbO6: Mn4+. The temperature-dependent spectra showed the thermal quenching of Mn4+ emission in Ba2LaNbO6: Mn4+ phosphors. The fluorescence lifetime-based optical temperature measurement was analyzed. The results suggested that Ba2LaNbO6: Mn4+ phosphor has potential in optical thermometry.
JOURNAL OF LUMINESCENCE
(2023)
Article
Spectroscopy
Fengya Hu, Dong Zhang, Yongjin Wu, Chengmei Sun, Chengcheng Xu, Qingru Wang, Yanru Xie, Qiang Shi, Shuhong Li, Kai Wang
Summary: Cubic type ZnTiO3 nanophosphors were synthesized and studied for their photoluminescence properties with Eu3+/Mn4+ co-doping and Mn4+ modification. The results showed that the surface modification by transition metals improved the temperature sensing performance of the crystals.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
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
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
Chemistry, Physical
XiuSha Peng, Jing Chen, YiHang Chen, YunCheng Jiang, RongFei Wei, WeiDong Zhou, HuiJun Li, Hai Guo
Summary: An array of Y2Mg2Al2Si2O12:Bi3+,Eu3+ phosphors with high energy transfer efficiency and excellent temperature sensing properties were successfully synthesized in this study. These samples may have important application value in the field of temperature measurement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Qiyun Liu, Meihua Wu, Boli Chen, Ximing Huang, Mingyong Liu, Yifei Liu, Ke Su, Xin Min, Ruiyu Mi, Zhaohui Huang
Summary: This study investigates the photoluminescence strategy of introducing Dy3+ for fluorescence intensity ratio thermometry (FIR). The crystal structure, morphology, and luminescence behavior of CaLa4(SiO4)3O: Dy3+ were studied. This research provides a research foundation and reference value for the temperature measurement of Dy3+ doped phosphors.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Hanyu Xu, Zuoling Fu, Yanling Wei
Summary: This work discusses the method to solve the deliquescence of Cs3ErF6 and its excellent temperature measurement performance. The soaking experiment found that water has irreversible damage to the crystallinity of Cs3ErF6, and successful isolation of Cs3ErF6 from vapor deliquescence was achieved through silicon rubber sheet encapsulation. Temperature-dependent spectra were obtained by heating samples to remove moisture, and two luminescent intensity ratio (LIR) temperature sensing modes were designed based on the spectral results. This study focuses on the deliquescence effect of Cs3ErF6 and the feasibility of silicone rubber encapsulation, and designs a dual-mode LIR thermometer for different situations.
Article
Optics
Haihong Xiao, Qingyu Meng, Changwen Wang
Summary: Eu3+ doped CaWO4 phosphors with different concentrations were synthesized by hydrothermal method. XRD and FE-SEM were employed to investigate the structure and morphology of the samples. The temperature dependent excitation and emission spectra of the phosphors were measured. The results showed that the luminescence of WO42- decreased with temperature increase, while the luminescence of Eu3+ exhibited a novel trend of first rising and then decreasing, which is attributed to the enhancement of energy transfer effect from the matrix to Eu3+. The Eu3+ and WO42- luminescence exhibited markedly different thermal quenching trends, and the relative sensitivity reached a maximum value of 3.25% K-1 at 303 K. The phosphor also exhibited a significant change in luminescence color from blue to orange-red with increasing temperature. Therefore, Eu3+ doped CaWO4 phosphor shows great potential as an optical temperature sensing material.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Ceramics
Himani Thakur, Sachin Singh, Arvind K. Gathania, Sunil Kumar Singh, Rajesh Kumar Singh
Summary: The Pechini sol-gel reaction technique was used to produce Tm3+, Yb3+ co-doped YVO4 and Li+/K+/Zn2+ codoped YVO4: Tm3+,Yb3+ phosphors. Post-heat treatment was conducted to strengthen the structural and optical characteristics of the samples. The prepared phosphors exhibited blue and near-infrared (NIR) light and showed strong upconversion emission when pumped with a laser at 980 nm.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Chuan Liao, Feng Chen, Hao Wu, Huajun Wu, Liangliang Zhang, Guo-hui Pan, Feng Liu, Xiao-jun Wang, Jiahua Zhang
Summary: The highly sensitive afterglow intensity ratio (AIR) thermometry based on thermal quenching (TQ) mechanism using Y3Al2Ga3O12:Pr3+ persistent phosphor is reported. The AIR shows strong temperature dependence in the range of 30-170 degrees C, with a maximum relative sensitivity of up to 4.12% degrees C-1 at 170 degrees C. The method is demonstrated by accurately measuring water temperature with an error of only 0.1 degrees C.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Zhiyu Zhang, Jingjing Tang, Minkun Jin, Yuexin Li, Wang Chen, Changheng Chen, Jinmeng Xiang, Chongfeng Guo
Summary: Non-invasive photo-thermal therapy (PTT) with accurate temperature monitoring is important for effective cancer treatment. This study developed dual-function photothermal agents YVO4: Nd3+, Yb3+@IR-780 with real-time temperature control and excellent photothermal conversion. The temperature detection behavior based on fluorescence intensity ratio (FIR) and fluorescence lifetime thermometry were investigated. Results showed the potential application of these photothermal agents in photothermal therapy.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Wenming Wang, Xiantao Wei, Hongmei Chen, Yan Pan, Yong Li
Summary: Ba2YF7: Ho3+/Yb3+ nanocrystals embedded in transparent glass-ceramics were fabricated using the traditional melt-quenching technique. Self-crystallization occurred during the formation of precursor glasses, as confirmed by X-ray diffraction patterns. After additional heat treatment, enhanced up-conversion emission and prolonged lifetimes were observed due to increased crystallinity. The red and green emissions of Ho3+ showed tunable behavior under 980-nm excitation when different concentrations of Ce3+ ions were doped into Ba2YF7: Ho3+/Yb(3+)nanocrystals.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Fangfang Hu, Gong Hailin, Ghulam Abbas Ashraf, Xiong Tao, Rongfei Wei, Hai Guo, Min Yin
Summary: In this study, transparent oxy-fluoride glass ceramics (GC) were successfully fabricated and applied as host materials for optical thermometers. The Na2GdF7:xTb3+ (x = 0.02, 0.03, 0.04, 0.05, and 0.06) GC samples exhibited high transparency and were researched for their structural, micro-topography, and fluorescence spectra properties. The Na2GdF7:0.3Tb3+ GC sample showed enhanced luminescence compared to the precursor glass and demonstrated excellent performance in low-lying state thermal coupling principle.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Fengfeng Chi, Liangliang Pan, Bin Jiang, Zhangchao Ji, Jie Cheng, Bing Wang, Xiantao Wei, Shengli Liu
Summary: Tb3+ and Eu3+ doped La4GeO8 phosphors with multicolor emission were synthesized and their photoluminescence properties were investigated. The energy transfer from Tb3+ to Eu3+ in La4GeO8 is attributed to quadrupole-quadrupole interaction. The La4GeO8:0.07Tb3+,0.01Eu3+ phosphor exhibits good thermal stability with activation energies of 0.186 eV and 0.187 eV for Tb3+ and Eu3+ ions, respectively. By adjusting the content ratio of Eu3+ to Tb3+, the La4GeO8:Tb3+,Eu3+ phosphors can achieve multicolor luminescence and tunable chromaticity. These findings suggest that La4GeO8:Tb3+,Eu3+ phosphors are promising for solid-state lighting applications.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Fengfeng Chi, Wenjuan Dai, Liting Qiu, Shengli Liu, Xiantao Wei, Yonghu Chen, Min Yin
Summary: In this study, a Cr3+-activated Lu2CaAl4GeO12 phosphor with far-red emitting was prepared, and its thermally stable luminescence was observed.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Fengfeng Chi, Zhangchao Ji, Qian Liu, Bin Jiang, Bing Wang, Jie Cheng, Bin Li, Shengli Liu, Xiantao Wei
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Liang Li, Qianwen Cao, Jing Xie, Wenming Wang, Jiajia Wang, Yan Pan, Xiantao Wei, Yong Li
Summary: Researchers successfully prepared a far-red emitting phosphor doped with Mn4+ ions, which can be efficiently excited and emit intense far-red light. The crystalline properties and luminescence performance were studied in detail, and the crystalline field effect and concentration quenching mechanism of Mn4+ ions in the matrix were explored. The phosphor exhibited high internal quantum efficiency, color purity, and activation energy, making it suitable for the preparation of LED devices for plant cultivation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Qianwen Cao, Liang Li, Yubei Wang, Wenming Wang, Hongmei Chen, Yan Pan, Xiantao Wei, Yong Li
Summary: This study demonstrates the use of Sr2InTaO6: Mn4+ phosphor for far-red light emission in LEDs for plant cultivation.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Wenming Wang, Liang Li, Hongmei Chen, Xiantao Wei, Juanying Jia, Yan Pan, Yong Li
Summary: In this study, Yb3+/Er3+ co-doped YOF glass ceramics were prepared and their luminescence and temperature sensing properties were investigated under 980 nm excitation. The fluorescence intensity ratio (FIR) of the thermal couple energy level (TCEL) and non-thermal couple energy level (NTCEL) was used to evaluate the temperature sensing sensitivity. The increase in pump power resulted in a decrease in relative sensitivity (SR) due to the thermal effect and increased rate of energy transfer and non-radiative relaxation process between dopants and host. The maximum relative sensitivity of this sample reached 1.59 x 10-2 K-1 at 310 K with a pump power of 0.2 W, indicating the prospective application of this glass ceramic in optical thermometry.
Article
Chemistry, Physical
Zhicheng Liao, Liting Qiu, Xiantao Wei, Yonghu Chen
Summary: A novel heat-quenching resistant phosphor Ba2YAlO5 doped with Bi3+ was successfully synthesized using the traditional high temperature solid-state method. The crystal structure and luminescence properties were characterized by XRD, SEM, DR spectra, and PL spectra. The phosphor exhibited a broad-band yellow light with a peak at 571 nm and a FWHM of 125 nm under 324 nm excitation. The integrated emission intensity at 560 K was still close to that at room temperature, indicating its excellent thermal stability. Ba2YAlO5: Bi3+ also showed yellowish white light with high color temperature, making it a promising fluorescent powder for high-power devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Liang Li, Qianwen Cao, Jing Xie, Wenming Wang, Yubei Wang, Hongmei Chen, Zhongyuan Li, Yan Pan, Xiantao Wei, Yong Li
Summary: Altering the local symmetry of an activator by lattice tuning is an effective strategy to optimize the luminescence performance of phosphors. In this study, a novel Mn4+-activated double perovskite phosphor LMTO with A-site defects was successfully prepared. By increasing the randomness of the A-site and the distortion index of the [MnO6] octahedron, the luminescence performance of the phosphor was further enhanced.
DALTON TRANSACTIONS
(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
Weiguo Jing, Mingzhe Liu, Xiantao Wei, Chong-Geng Ma, Min Yin, Chang-Kui Duan
Summary: In this study, the defect levels of transition metal ions in various insulating materials were investigated using density functional theory. The results show that the proposed calculation scheme is effective in predicting the valence states and defect levels of transition metal ions, which can aid in the design and optimization of optical materials.
Article
Materials Science, Multidisciplinary
Mingzhe Liu, Chang-Kui Duan, Peter A. Tanner, Chong-Geng Ma, Xiantao Wei, Min Yin
Summary: This study reveals the mechanisms of photoluminescence in doped lead-free halide perovskites through theoretical calculations, showing that the main photoluminescence can be attributed to highly localized self-trapped excitons. The research may inspire further understanding of the photoluminescence mechanisms in other materials.
Article
Chemistry, Inorganic & Nuclear
Liting Qiu, Peng Wang, Jiashan Mao, Zhicheng Liao, Fengfeng Chi, Yonghu Chen, Xiantao Wei, Min Yin
Summary: With the increasing demand for non-contact temperature sensing, the development of an excellent optical thermometer has become more compelling. In this study, a Cr3+-doped InTaO4 phosphor was prepared and investigated for its temperature-dependent fluorescence intensity and fluorescence lifetime, achieving high-sensitivity temperature sensing in two different modes. Additionally, a time-resolved technique was also presented, which showed improved temperature sensitivity and resolution. The results demonstrate the promising potential of InTaO4:Cr3+ phosphor in multi-mode high-sensitivity optical thermometry and temperature imaging.
INORGANIC CHEMISTRY FRONTIERS
(2022)
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)
