Article
Materials Science, Multidisciplinary
Yangyinyi Duan, Xiangping Li, Rensheng Shen, Yuhang Zhang, Xin Wang, Zhipeng Guan, Ke Wang, Yongze Cao, Xizhen Zhang, Baojiu Chen
Summary: Sm3+ doped sodium germanate glasses with suitable composition and good luminescence thermal stability were synthesized using high temperature melt-quenching technique. The luminescence performance and optical transition properties of Sm3+ in the glasses were studied. The concentration dependent luminescence quenching of the (4)G(5/2) level of Sm3+ was found to be due to the electric dipole-dipole interaction among Sm3+. Temperature dependent luminescence characteristics and thermal quenching behavior were also investigated, showing excellent luminescence thermal stability.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Physical
Pawan Kumar, Devender Singh, Isha Gupta, Sitender Singh, Vinod Kumar
Summary: In this study, a gel-combustion process was used to synthesize perovskite based Gd1-xAlO3:xSm3+ (x = 0.01, 0.03, 0.05, 0.07 and 0.09 mol) nanomaterials which emit reddish orange light. The crystallographic investigation revealed that the synthesized nanocrystalline materials have orthorhombic crystal symmetry with space group Pnma (62). TEM analysis confirmed the presence of non-uniform agglomerated particles in the nano range (35-45 nm), consistent with the XRD analysis. The PL spectra showed 4f-transitions of trivalent samarium ions and the energy transfer mechanism between neighboring samarium ions was found to be dipole-dipole interaction. Colorimetric characteristics such as color coordinates, color-purity and correlated color temperature were obtained using PL data, suggesting these nanophosphor samples are highly suitable for solid state lighting applications.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Sadaf Gauhar M. Mushtaque, V. B. Pawade, S. J. Dhoble
Summary: This work presents optimized luminescence spectra for Ce3+, Sm3+-doped NaSrPO4 phosphor synthesized through a wet chemical method. The impurities Ce3+ and Sm3+ exhibit spectral splitting bands corresponding to d-f and f-f transitions, respectively, when doped in the NaSrPO4 host lattice. The emission bands observed in the Ce3+ excitation range were located at 269 nm, 292 nm, and 321 nm, with a broad spectral range of 330-430 nm. On the other hand, when Sm3+ ions were doped in the same host lattice, characteristic emission bands appeared at 590 nm and 645 nm in the orange-red region, under sharp excitation bands located at 345 nm, 361 nm, 375 nm, and 403 nm, respectively. Energy transfer analysis was also carried out for Ce3+/Dy3+-doped NaSrPO4 phosphor. Further characterization using X-ray diffraction and transmission electron microscopy confirmed the crystalline phase and nanophase nature of the phosphor compound.
Article
Food Science & Technology
Dianbo Zhao, Shuliang Yan, Jialei Liu, Xi Jiang, Junguang Li, Yuntao Wang, Jiansheng Zhao, Yanhong Bai
Summary: This study examined the impact of chickpea dietary fiber (CDF) concentration on the emulsion gel properties of myofibrillar protein (MP). It was found that increasing the CDF content improved the emulsifying activity, stability, water- and fat-binding capacity, gel strength, and storage modulus of the MP emulsion gel. The addition of CDF also led to a denser gel network structure with smaller pore diameter. Furthermore, CDF increased the content of β-sheet and reactive sulfhydryl, as well as the surface hydrophobicity of MP, contributing to the improved gel properties of the emulsion.
Article
Materials Science, Multidisciplinary
Xiaoyan Huang, Aimin Sun, Ying Jiang, Jialing Wang
Summary: Ni-Zn-Co ferrite doped with Sm3+ was prepared using the sol-gel method. XRD results showed a cubic spinel structure for the samples. FTIR indicated the chemical properties of the samples, and the elastic modulus variation matched the XRD structural characteristics. SEM and TEM revealed spherical cubic morphologies. EDS confirmed no impurity elements in the compositions. VSM analysis showed soft magnetic characteristics for the samples, with coercivity values related to domain wall displacement and rotation.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
M. Krishnam Raju, R. Prasada Rao, N. Vijayan, P. Abdul Azeem
Summary: Trivalent samarium activated beta-Wollastonite nanostructured phosphor powders were successfully synthesized using a modified sol-gel method, showing potential for white light display and solid-state lighting applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Applied
Jing Rong, Wanxia Zhao, Wen Luo, Keke Kang, Lulu Long, Yang Chen, Xiaojiang Yao
Summary: In this study, MnXOx catalysts (including MnSmOx, MnNdOx, MnCeOx) were prepared and used for NH3-SCR reaction. Among them, MnCeOx catalyst exhibited the best low temperature catalytic activity (with over 90% NOx conversion in the temperature range of 125-225°C) and excellent resistance to H2O + SO2. Characterization analysis revealed that MnCeOx catalyst had the highest amount of acid sites and the best reducibility, and the Ce4+ doping inhibited the crystallization of the catalyst and resulted in the largest specific surface area. Furthermore, in situ DRIFTS experiments showed that the NH3-SCR reaction over MnCeOx catalyst proceeded via both Langmuir-Hinshelwood (LH) and Eley-Rideal (E-R) mechanisms, indicating a fast SCR reaction.
JOURNAL OF RARE EARTHS
(2023)
Article
Materials Science, Multidisciplinary
Dan Zhou, Liping Yang
Summary: Molybdenum oxide (MoO3) electrochromic (EC) materials are not widely used due to poor performance and inadequate research. Modified nanocrystalline MoO3 films were fabricated using a cheap and simple sol-gel method with dopamine (DA) as a structure-directing agent. The modified film showed significantly improved EC properties compared to pure MoO3 film, including optical contrast, coloration efficiency, switching speed, and cycling stability. Additionally, a dual active layer EC device using the modified MoO3 film and polyaniline demonstrated its potential application.
Article
Materials Science, Multidisciplinary
Jianwen Zhao, Jun Dong, Jian Zhou, Linsheng Wang
Summary: This study introduced the method of introducing Sm3+ ions as co-dopants into CNPO: Eu3+ red phosphors, which can enhance blue-light excitation and red-light emission. The prepared materials exhibited red emission and worked under blue light or near-ultraviolet light excitation. The study demonstrated the potential advantages of these phosphors in blue chip-based WLED applications.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Engineering, Electrical & Electronic
Xin Zhang, Feng Guo, Li Zhuang, Qinghui Jin, Xiaowei Zhang
Summary: Co-doping Ce3+ ions and size-tunable SnO2 nanocrystals into Tb3+ ions embedded silica thin films can enhance the Tb3+ emission by nine times. By optimizing the doping ratio of Sn4+ ions and annealing temperature, the size of SnO2 nanoparticles was tailored to enhance the photoluminescence emission from Tb3+ ions. Addition of a proper concentration of Ce3+ ions further increases the emission, but high concentration of Ce3+ ions attenuates the photoluminescence intensity. High annealing temperature such as 1000 degrees Celsius can also enhance the emission.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Composites
Yuchen Tong, Zhufeng Hu, Min Wang, Chao Yang, Junbo Xu
Summary: In this study, CF-ZrO2/ZrC composites with controllable coating thickness were prepared using an in-situ sol-gel method. By changing the hydrophobicity of the carbon fibers surface, the interface affinity was increased, ensuring the preparation of uniform coatings. The coating layer increased the thickness of the composites and prevented further oxidation of internal carbon. This method effectively improved the ablative resistance and thermal decomposition temperature of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Food Science & Technology
Zhenzhen Zhang, Xiaoyu Chen, Xinshuo Liu, Wei Liu, Qiannan Liu, Junrong Huang, Liang Zhang, Honghai Hu
Summary: The study investigated the effects of different concentrations of sodium chloride and calcium chloride on mixed gels comprising wheat gluten protein and potato protein isolate. Results showed that appropriate concentrations of salt ions can improve the structure of the mixed gel system, while exceeding the threshold concentration can limit the stability of the gel network.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Shang-Rui Nan, Zhen-Dong Fu, Yun-Xiao Zhang, Gui-Xia Liu
Summary: A series of YNbO4: Tb3+ ,Sm3+ phosphors were synthesized by sol-gel process, showing characteristic green emission of Tb3+ and orange red emission of Sm3+ under the excitation of 290 nm. The emitting color can be adjusted by changing the doping concentration of Sm3+.
CHINESE JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Feng Yang, Yuangang Xu, Pengcheng Wang, Qiuhan Lin, Ming Lu
Summary: This study synthesized two series of Energetic metal-organic frameworks (EMOFs) with different ligands and characterized their structure, thermal stability, thermal decomposition kinetics, and energy performance, showing a wide range of density and acceptable energy performance. Among these EMOFs, [Ag(tntrza)](n) stood out for its exceptional detonation performance and catalytic effect on the decomposition of ammonium perchlorate (AP), broadening the horizon for oxygen-enriched EMOFs with catalytic effects.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Jun Zhang, Shao-Hua Luo, Li-Li Sui, Qun-Xiang Ren, Yan Qin, Da-Jun Zhang
Summary: Neodymium-ion doping has been found to have an effect on the crystalline microstructure, crystal appearance, and electrochemical parameters of LiMnPO4/C cathodes. Proper neodymium-ion doping can enhance lithium-ion diffusivity and improve the high-rate performance of the cathode materials, as demonstrated by the LiMn0.94Nd0.06PO4/C sample.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
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)