Article
Materials Science, Ceramics
Mahvash Siahmansouri, Mehdi Mousavi-Kamazani
Summary: The synthesis and characterization of hollow flower-like NixZn2-xV2O7/WO4 nanostructures were reported using a simple Pechini sol-gel method to improve desulfurization efficiency of petroleum derivatives. Factors affecting morphology, such as chelating agent, gelling agent, and elements ratio, were investigated to determine optimal conditions. SEM images showed that involvement of all elements Ni, Zn, V, and W resulted in formation of hollow structures with high surface area, leading to over 95% efficiency of photocatalytic oxidative desulfurization after 2.5 hours under visible light. The presence of EDTA reduced efficiency to 23%, indicating superoxide as the most active radical species in the process. Comparisons of different compositions showed varying efficiency, highlighting the impact of both composition and morphology.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Angel de Jesus Morales-Ramirez, Margarita Garcia-Hernandez, Maria Luz Carrera-Jota, Paulina Garnica-Chavez, Brenely Gonzalez-Penguelly, Aristeo Garrido-Hernandez
Summary: Lu2Si2O7:Eu3+ thin films were prepared using sol-gel methods and dip coating, and exhibited a monoclinic structure with preferential orientation along a specific direction after heat treatment. The films showed strong emission from Eu3+ ions, with the optical yield and decay time increasing with the SiO2 content.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Linqing Yue, Bo Zhong, Long Xia, Tao Zhang, Yuanlie Yu, Xiaoxiao Huang
Summary: This study successfully prepared a series of three-dimensional network-like structures formed by silicon-coated carbon nanotubes through an improved process, which play a significant role in enhancing the electromagnetic wave absorption performance and achieved good absorption effects.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Greta Inkrataite, Meldra Kemere, Anatolijs Sarakovskis, Ramunas Skaudzius
Summary: This study investigated the impact of boron doping on YAG, YLuAG, and LuAG materials, showing that the addition of boron can indeed shorten decay time and increase emission intensity. Powder compounds containing 1% and 5% boron exhibited the most intense emission, while pure samples doped with 5% boron showed the shortest decay times.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Musa Mohamed Zahidi, Mohamad Hafiz Mamat, A. Shamsul Rahimi A. Subki, Mohd Hanapiah Abdullah, Hamizura Hassan, Mohd Khairul Ahmad, Suriani Abu Bakar, Azmi Mohamed, Bunsho Ohtani
Summary: This study fabricated a unique nanorod-assembled actinomorphic-flower-like microsphere structured film of tantalum (Ta)-doped titanium dioxide. The Ta-doped TiO2 actinomorphic-flower-like microsphere (TAFM) was prepared via the solution immersion method. Characterization of the samples using various techniques showed that the rutile-phased TAFM sample had finer nanorods with enhanced electrical properties. It was also found that the TAFM exhibited high electron trap density and showed promising results as a resistive-type sensing film for a humidity sensor.
Article
Chemistry, Multidisciplinary
Huaxin Gong, Jan Ilavsky, Ivan Kuzmenko, Shucheng Chen, Hongping Yan, Christopher B. Cooper, Gan Chen, Yuelang Chen, Jerika A. Chiong, Yuanwen Jiang, Jian-cheng Lai, Yu Zheng, Kevin H. Stone, Luke Huelsenbeck, Gaurav Giri, Jeffrey B. -H. Tok, Zhenan Bao
Summary: The formation process of flower-like polyacrylonitrile particles has been investigated, and the mechanism behind it has been revealed. The petals within the particles consist predominantly of orthorhombic PAN crystals, and branching of the petals is a result of fast nucleation and growth of PAN on pre-existing crystals. The particles maintain a constant center-to-center distance due to strong electrostatic repulsion.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
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
Chemistry, Physical
Madara Leimane, Katrina Krizmane, Ivita Bite, Jurgis Grube, Virginija Vitola
Summary: This study demonstrates the synthesis of SrAl2O4 doped with Eu, Dy, and B in a SiO2 glass structure using the low-temperature sol-gel method. By varying the synthesis conditions, water-soluble precursors and a dilute aqueous solution of rare-earth nitrates were used as starting materials, resulting in translucent, persistently luminescent glass. It is concluded that the slow drying procedure is optimal for removing excess water and solvent molecules, while boron plays a crucial role in the formation of trapping centers.
Article
Materials Science, Multidisciplinary
Ziqing Yang, Xiaosi Qi, Chen Li, Qiqing Liang, Lei Wang, Junfei Ding, Yunpeng Qu, Xiu Gong, Wei Zhong
Summary: In this study, a strategy of constructing abundant interfaces to enhance interfacial polarization for the attenuation of electromagnetic wave was proposed and investigated. CoNi nanospheres, CoNi@SiO2 nanospheres and core@shell CoNi2S4/Co9S8@SiO2@MoS2 flower-like multicomponent nanocomposites (MCNCs) were fabricated, and the results showed that the elaborately constructed abundant interfaces greatly boosted the polarization loss ability, resulting in enhanced interfacial polarization and superior electromagnetic wave absorption properties. Furthermore, optimization of hydrothermal temperature and filler loading further improved the electromagnetic wave absorption properties of the MCNCs. This finding not only demonstrated the effectiveness of introducing abundant interfaces to strengthen interfacial polarization, but also provided an alternative approach for the development of novel high-efficiency microwave absorbers.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Lili Zhang, Chun Shi, Hailong Lu, Hongwei Li, Xiaofan Zhou, Zhiguo Wang, Jinxia Ma
Summary: The recyclability of heterogeneous catalysts is crucial for their utilization efficiency, cost, sustainability, and environmental impact. In this study, flower-like ZnO-Cu nanoparticles were synthesized in a porous cellulose gel to obtain a ZnO-Cu/cellulose composite gel (ZnO-Cu/CCG) catalyst, which demonstrated excellent recycling and reusing stability. The catalysts with different morphologies were prepared by dissolving cellulose into zinc chloride solvent and regenerating with different coagulating baths. The ZnO-Cu/CCG catalysts exhibited higher catalytic efficiency compared to ZnO-Cu powders, and their catalytic performance remained stable over repeated cycles.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Andrea Danielle Cancino-Moreno, Arturo Lopez-Marure, Jorge Humberto Luna-Dominguez, Angel de Jesus Morales-Ramirez, Mayahuel Ortega-Aviles, Jose Alfredo Alvarez-Chavez, Margarita Garcia-Hernandez
Summary: Eu3+-(5% mol)-doped Lu2SiO5 optical quality films were prepared using the sol-gel method and dip-coating technique. The incorporation of Eu3+ ions did not affect the monoclinic crystalline phase of Lu2SiO5. Films without surfactant exhibited a uniform and low rugosity morphology, while films with surfactant showed porous hills and valleys with uneven roughness. The photoluminescence spectrum of Eu3+:Lu2SiO5 films exhibited 2 broad emission peaks. The presence of Glymo promoted the formation of residual Lu2Si2O7 compounds with higher lifetime values.
Article
Chemistry, Analytical
Sung-Hun Kim, Won-Ju Cho
Summary: The electrical properties of solution-processed indium-tin-oxide (ITO) thin films were enhanced through microwave irradiation (MWI) and argon (Ar) gas plasma treatment. The ion bombardment effect during Ar plasma treatment increased oxygen vacancies, improving the electrical properties of the ITO thin films. The combination of MWI post-deposition annealing and Ar plasma treatment presents new possibilities for improving the high-conductivity sol-gel ITO electrode.
Article
Engineering, Chemical
Hendrix Abdul Ajiz, Kenny Santoso, Jason Aditya Purnama, Widiyastuti Widiyastuti, Tantular Nurtono, Heru Setyawan
Summary: The photoluminescence characteristics of ZnO/SiO2 composite particles were investigated by using the consecutive sol-gel spray drying method. The addition of sodium lauryl sulfate (SLS) as a particle morphology control agent could reduce the particle diameter and increase the particle uniformity. Increasing the excitation wavelength and adding silica to the composite particles could enhance the photoluminescence emission intensity without causing a shift in the emission peaks.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Optics
Greta Inkratait, Zivile Stankeviciute, Ramunas Skaudzius
Summary: Compounds with garnet structure, such as cerium-doped yttrium and lutetium aluminum garnets, have attracted significant attention due to their high density, thermal stability, intense emission/excitation, and high quantum efficiency. Further optimization is needed to improve scintillator performance, particularly in shortening decay time.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Ri Xiang, Lichun Cheng, Haiying Qi, Man Wang, Qingrong Yao, Yucheng Chen, Chaohao Hu, Huaiying Zhou
Summary: This study reports for the first time that porous Sm-doped CaFe0.5Mn0.5O3-delta (CFMO) exhibits excellent microwave absorption properties. By adding Sm elements, the porous structure, interfacial polarization, and defect polarization of CFMO are increased, along with the oxygen vacancy content, leading to enhanced charge polarization and dipole polarization. The combination with paraffin wax further enhances the interfacial polarization capacity, thereby improving the microwave absorption performance of the sample. This research holds great significance for the development of absorbing materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)