Article
Chemistry, Physical
S. U. Costilla-Aguilar, M. Pech-Canul, M. J. Escudero, R. F. Cienfuegos-Pelaes, J. A. Aguilar-Martinez
Summary: The study investigated the effect of complexing agent/transition metal ratio on GDC powders, revealing that higher temperatures and R ratios led to larger grain sizes, with GDC-R1 showing a larger specific surface area. The GDC-R1 sample sintered at lower temperatures exhibited the lowest average grain size and the highest ionic conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
V Ganesh, Yugandhar Bitla, L. Haritha, Mohd Shkir, S. AlFaify
Summary: Cadmium oxide (CdO) thin films doped with different concentrations of yttrium (Y) were prepared using the spin coating technique. The study investigated the impact of Y doping on the structural, morphological, linear, and nonlinear optical properties of the CdO thin films. Results showed an increase in grain size with higher Y doping, and a significant suppression of both linear and nonlinear optical properties.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Debasrita Bharatiya, Biswajit Parhi, Sarat K. Swain
Summary: In this study, a GO-based ZnO, CuO, and Ag2O mixed ternary nanostructured composite was developed using a simple sol-gel synthesis approach, showing enhanced dielectric properties and potential charge storage applications. Physio-chemical characterization techniques were used to study the properties of the composite, highlighting its remarkable dielectric and charge storage capabilities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Natalia Pawlik, Barbara Szpikowska-Sroka, Tomasz Goryczka, Wojciech A. Pisarski
Summary: A series of silicate xerogels co-doped with Gd3+ and Eu3+ ions were synthesized and processed into nano-glass-ceramic materials using a sol-gel method. The crystallization of hexagonal LaF3 fraction was triggered by heat treatment, and Gd3+ ions acted as dopants in the fluoride crystal lattice. The optical characterization revealed unexpected prolongation of Gd3+ lifetimes in nano-glass-ceramics with specific RGd/Eu values.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Muhammad Adnan, Muhammad Usman, Muhammad Aftab Akram, Sofia Javed, Saqib Ali, Iftikhar Ahmad, Mohammad Islam
Summary: In this study, zinc ferrite and cobalt chromite nanoparticles were synthesized using sol-gel process and hydrothermal method, respectively, and mixed to form nanocomposites with spinel structure without affecting functional groups. Changes in magnetic properties were observed with increased CC component, leading to optimized magnetic parameters in ZF-CC.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Teng Zheng, Marcin Runowski, Natalia Stopikowska, Malgorzata Skwierczynska, Stefan Lis, Peng Du, Laihui Luo
Summary: Optical thermometers based on Er3+/Tm3+/Yb3+-doped Bi2MoO6 materials exhibit bright color-tunable upconversion emissions and exceptional thermal sensitivity, making them promising candidates for multi-parameter temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Jingwei Zhao, Zhonghua Yao, Zhijian Wang, Ning Zhang, Hua Hao, Minghe Cao, Hanxing Liu
Summary: By employing microstructural engineering, an optimized lead-free Zr-modified BiMg0.5Zr0.04Tix-0.04O3 composition was developed to enhance energy storage behavior, achieving superior energy properties and high efficiency. Rapid annealing and excess Ti source doping effectively increased polarization and dielectric breakdown levels.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Juan Hu, Ye Chen, Yan Zhang, Shikun Chen, Hong Chen, Jing Zhu, Ruili Lu, Nengcong Yang
Summary: We prepared g-C3N4/Ag/CoFe1.95Eu0.05O4 heterojunctions that effectively absorbed visible light and efficiently separated photogenerated electron-hole pairs. The kinetic constants of the Z-type heterojunctions gC3N4/Ag/CoFe1.95Eu0.05O4 in the degradation of methyl orange were significantly higher than those of gC3N4/Ag/CoFe1.95Eu0.05O4 and g-C3N4, indicating its potential in photocatalytic degradation of organic pollutants.
Article
Materials Science, Multidisciplinary
M. Isik, N. M. Gasanly
Summary: In this study, Al-doped ZnO nanostructured thin films were produced using AZO ink, and their structural characteristics were analyzed using XRD and SEM techniques. The results showed that the AZO thin films had a well-defined hexagonal crystal structure, and the size of the nanostructure particles varied between 20 and 30 nm. It was also found that the bandgap energy of the Al-doped ZnO nanostructured films changed with temperature, and this temperature-bandgap energy dependency was studied using transmission experiments and mathematical models.
Article
Materials Science, Multidisciplinary
M. Thambidurai, G. Saranya, R. Yuvakkumar, Cuong Dang
Summary: Researchers have successfully prepared cauliflower like cadmium oxide and cesium-doped CdO nanostructured films, and experimentally confirmed the decrease in the band gap energy of CdO structure upon Cs doping.
Article
Optics
Brian Rogers, Tatsiana Mikulchyk, Mohamed Oubaha, Dervil Cody, Suzanne Martin, Izabela Naydenova
Summary: Continual improvements in holographic recording materials allow for the development of volume holographic optical elements for various applications. A water-resistant photosensitive sol-gel shows promise due to its environmental and physical robustness, but its refractive index modulation is currently limited. This research focuses on improving the refractive index modulation and photosensitivity/recording speed through various methods, such as matching the recording wavelength and layer absorption, as well as chemical alterations and thermal post-processing techniques.
Article
Chemistry, Physical
Igor A. Pronin, Alexander P. Sigaev, Alexei S. Komolov, Evgeny V. Zhizhin, Andrey A. Karmanov, Nadezhda D. Yakushova, Vladimir M. Kyashkin, Konstantin N. Nishchev, Victor V. Sysoev, Sanket Goel, Khairunnisa Amreen, K. Ramya, Ghenadii Korotcenkov
Summary: In this work, the effects of nitrogen and oxygen plasma treatment on nanostructured SnO2-SiO2 films derived from a sol-gel method are studied. The structural and chemical properties of the films are closely examined. It is found that treatment with oxygen plasma leads to stoichiometry deviation and the appearance of a tin monoxide phase on the SnO2 surface, resulting in the highest photocatalytic activity. In contrast, treatment with nitrogen plasma does not cause noticeable changes in the material, but increasing plasma power leads to the appearance of SnO fraction on the surface and a decrease in photocatalytic activity. Overall, all types of plasma treatment lead to amorphization in the SnO2-SiO2 samples.
Article
Chemistry, Inorganic & Nuclear
J. Gajendiran, S. Gnanam, C. Parthasaradhi Reddy, G. Ramesh Kumar, V. C. Bharath Sabarish, S. Gokul Raj, K. Ramachandran, V. P. Senthil, V. Gopi
Summary: In this paper, BiFeO3, YMnO3, and BiFeO3-YMnO3 compounds were synthesized and their structural, morphological, and light absorption characteristics were compared for the first time.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Optics
Qiang Ren, Yujing Zhao, Xiulan Wu, Ou Hai
Summary: The research successfully synthesized single-phase phosphor samples co-doped with Tb3+/Eu3+/Tm3+ in LaAl2.03(B4O10)O-0.54, demonstrating potential application value in the field of white-emitting phosphors.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Yang Lou, Yang Chen, Zhimu Gu, Qiang Qiu, Chanjuan Shi, Le He, Yingbin Xing, Jinggang Peng, Haiqing Li, Yingbo Chu, Jinyan Li, Nengli Dai
Summary: This study demonstrates the highly efficient and stable photoluminescence properties of Er3+/Yb3+/Zr4+ co-doped BaTiO3 ceramic. The emission intensity of Er3+ in the green region was significantly increased under the optimized Zr4+ concentration, and thermal enhancement of emission at different wavebands was achieved with different Zr4+ concentrations. Additionally, thermal quenching behavior was suppressed by energy transfer and ligand distortion induced by Zr4+.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
S. Gonzalez-Perez, J. Sanchiz, V. D. Rodriguez, D. Canadillas-Ramallo, J. Gonzalez-Platas, D. Borchert, B. Gonzalez-Diaz, C. Hernandez-Rodriguez, R. Guerrero-Lemus
JOURNAL OF LUMINESCENCE
(2018)
Article
Materials Science, Ceramics
J. J. Velazquez, J. Mosa, G. Gorni, R. Balda, J. Fernandez, L. Pascual, A. Duran, Y. Castro
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2019)
Article
Chemistry, Multidisciplinary
Giulio Gorni, Jose J. Velazquez, Jadra Mosa, Glenn C. Mather, Aida Serrano, Maria Vila, German R. Castro, David Bravo, Rolindes Balda, Joaquin Fernandez, Alicia Duran, Yolanda Castro
Article
Materials Science, Ceramics
J. J. Velazquez, J. Mosa, G. Gorni, R. Bald, J. Fernandez, A. Duran, Y. Castro
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2019)
Article
Chemistry, Multidisciplinary
Jose J. Velazquez, Giulio Gorni, Rolindes Balda, Joaquin Fernandez, Laura Pascual, Alicia Duran, Maria J. Pascual
Article
Materials Science, Ceramics
Jose J. Velazquez, Rolindes Balda, Joaquin Fernandez, Giulio Gorni, Mercedes Sedano, Alicia Duran, Dusan Galusek, Maria J. Pascual
Summary: Transparent NaLuF4 glass-ceramics doped with Tm3+ and Tm3+/Yb3+ were prepared by melting-quenching and thermal treatment, where NaLuF4 nanocrystals were found as the only crystalline phase, showing tunable up-conversion emission from near-infrared to blue under different excitation wavelengths. Energy transfer between ions and incorporation of rare earth ions were confirmed, demonstrating the potential for various optical applications.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Rajesh Dagupati, Robert Klement, Ramaraghavulu Rajavaram, Jose J. Velazquez, Dusan Galusek
Summary: Transparent oxyfluoride glass-ceramics with embedded beta-Na-1.Y-5(1).F-5(6) crystals doped with Er3+ ions were fabricated, showing bright green up-conversion emission. Temperature-dependent visible UC behavior in Er-G and Er-GC samples was examined, with a maximum relative sensitivity of 1.1% K-1 at 298 K.
Article
Materials Science, Ceramics
Vijay Bijalwan, Vladimir Prajzler, Jiri Erhart, Jose J. Velazquez, Dusan Galusek, Karel Maca
Summary: This study presents an innovative method for processing lead-free piezoceramics using Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT), Ba0.95Ca0.05Ti0.91Sn0.09O3 (BCST), and BCZT doped with 0.07-wt.% CeO2 (Ce-BCZT). The rapid pressureless sintering technique allows for a significant reduction in high-temperature processing time. The resulting ceramics exhibit defect and crack-free microstructures with optimal characteristics in terms of piezoelectric constant and energy-harvesting properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Surjyakanta Rana, Jose J. Velazquez, Sreekantha B. Jonnalagadda
Summary: In this study, amine-functionalised mesoporous silica was prepared using the sonication method, showing excellent catalytic activity with high selectivity and conversion. The material was fully characterised by different techniques to understand its performance comprehensively.
Article
Materials Science, Ceramics
Rajesh Dagupati, Mercedes Sedano, Robert Klement, Jose J. Velazquez, Alicia Duran, Francisco Munoz, Maria J. Pascual, Dusan Galusek
Summary: The influence of Al2O3 addition on the precipitation of NaYF4 crystals in oxyfluoride glasses has been investigated. The results showed that an increased amount of Al2O3 reduced the crystallization of NaYF4 phase and resulted in the presence of phase-separated droplets and NaYF4 nanocrystals in the glass-ceramics.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Surjyakanta Rana, Jose J. Velazquez, S. B. Jonnalagadda
Summary: In this study, an air-stable Ni nanoparticle catalyst was prepared and demonstrated superior efficacy in the C-S coupling reaction. The catalyst showed excellent recyclability without any loss of activity for up to 7 cycles.
NANOSCALE ADVANCES
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
G. Gorni, J. J. Velazquez, M. Kochanowicz, D. Dorosz, R. Balda, J. Fernandez, A. Duran, M. J. Pascual
FIBER LASERS AND GLASS PHOTONICS: MATERIALS THROUGH APPLICATIONS II
(2020)
Article
Chemistry, Multidisciplinary
G. Gorni, Jose J. Velazquez, M. Kochanowicz, D. Dorosz, R. Balda, J. Fernandez, A. Duran, M. J. Pascual
Proceedings Paper
Optics
A. A. Cabral, G. Gorni, J. J. Velazquez, M. J. Pascual, A. Duran, J. Fernandez, R. Balda
OPTICAL COMPONENTS AND MATERIALS XVI
(2019)
Proceedings Paper
Quantum Science & Technology
Rolindes Balda, Giulio Gorni, Jose J. Velazquez, Maria J. Pascual, Alicia Duran, Joaquin Fernandez
QUANTUM NANO-PHOTONICS
(2018)
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)