Article
Materials Science, Multidisciplinary
Lei Jia, Ming-fang Yang, Shi-ping Tao, Hui Xie, Zhen-lin Lu, Katsuyoshi Kondoh, Zhi-guo Xing
Summary: Cu-Ni-Si powder compacts were prepared by mechanical mixing and cold-pressing, followed by heat treatment and water quenching. The microstructure and phase composition of the samples were analyzed using various techniques, revealing the formation of Ni31Si12 phase and Ni2Si precipitations at different temperatures. The final microstructure of Cu-Ni-Si powder system after sintering showed a combination of Cu(Ni,Si) solid solution and equiaxed Ni31Si12 phase, which could potentially achieve high strength and electrical conductivity after heat treatments.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Ceramics
Xi Wang, Shicheng Zhou, Kaiyang Liu, Shan Deng, Yaqi Xiao, Xiuli Chen, Huanfu Zhou
Summary: Extensive research has been conducted on microwave dielectric materials for their application in 5G and 6G communication technologies. This study broadened the sintering temperature range of MT-C ceramics using a composite of CeO2 and Mg2TiO4 ceramics, and stabilized their microwave dielectric performance. The prepared MT-C ceramics exhibited low loss and uniform density, making them suitable for industrial applications in the field of communication.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Zhihao Guo, Qihou Li, Xinhai Li, Zhixing Wang, Huajun Guo, Wenjie Peng, Guangchao Li, Guochun Yan, Jiexi Wang
Summary: A rational powder-covering sintering strategy is proposed to prepare highly uniformly dense garnet type solid-state electrolyte, and the microstructural and macrostructural characteristics of the sintering process are studied. The as-prepared electrolyte exhibits good ionic conductivity and cycling stability.
Article
Materials Science, Multidisciplinary
S. R. A. Rani, A. P. Sambayu, S. Suasmoro
Summary: This study focused on the sintering process of Mg0.8Zn0.2TiO3 (MZT) with the addition of K0.5Na0.5VO3 (KNV) and Bi2O3. The analysis of the structure, microstructure, and phase composition of the sintered samples revealed the presence of MgZnTiO3, KNaVO3, and BiVO4 phases, as well as a non-crystalline phase believed to be the melted amorphous phase of Bi2O3. The study also found that the sintering aid partially dissolved in the MZT matrix, resulting in an increase in lattice parameter and cell volume of the samples. Electrical property characterization showed a broader range of space charge polarization at low frequencies and an enhancement of permittivity and quality factor Qxf at high frequency. The MZT85 sample exhibited a relative permittivity of approximately 16.08, a dielectric loss of approximately 10(-2), and a Qxf value of 11.386 GHz at 10 GHz.
BULLETIN OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
Seung Hyun Jin, Hae Won Lee, Na Won Kim, Byung-Woo Lee, Gil-Geun Lee, Youn-Woo Hong, Woo Hyun Nam, Young Soo Lim
Summary: This study demonstrates the sonochemically activated solid-state synthesis of BaTiO3 powders, which accelerates the phase conversion process and can replace traditional ball-mill mixing methods.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Yi-Hsin Lin, Fu-Su Yen, Hsing- Hsiang, Man-Nee Lee
Summary: This study investigates a quasi-synchronous solid-state reaction for synthesizing cordierite powder using talc, kaolinite, and Al2O3 mineral powders as starting materials. The thermal reaction proceeds in two stages, with different temperatures required based on the Al sources provided. Mixing α-cordierite powder with the starting constituents allows for the temperature of the first stage to coincide with that of the second stage. Excess SiO2 released in the second stage compensates for the insufficient SiO2 in the first stage, resulting in a smooth processing reaction and the formation of α-cordierite.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Vidushi Karol, Chandra Prakash, Anshu Sharma
Summary: In this study, the influence of magnesium substitution on Ba0.95-xSr0.05MgxTiO3 was investigated, leading to an improvement in the dielectric loss which is significant for potential applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Asapu Vinaya Kumar, V. Subramanian, V. Sivasubramanian
Summary: This paper reports a significant change in the microwave dielectric properties of ZnNb2O6 by heterovalent substitution of Ti4+ and W6+ in Nb-site forming a solid solution Zn(Nb1-2xTixWx)2O6.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
M. Romero-Sanchez, T. Sanchez-Mera, J. Santos-Cruz, C. E. Perez-Garcia, M. de la L Olvera, C. R. Santillan-Rodriguez, J. Matutes-Aquino, G. Contreras-Puente, F. de Moure-Flores
Summary: Bi(1.6)Pb(0.4)Sb(0.0)6Sr(2)Ca(2)Cu(3)O(y) superconductors were processed by solid-state reaction with varying sintering time. The structural, morphological, and electrical properties of the samples were significantly influenced by the sintering time.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Xiao Wang, Yuan Liu, Like Li, Caleb O. Yenusah, Yaohong Xiao, Lei Chen
Summary: This study revealed the mechanisms of layer-by-layer powder compact densification during S-DMLS with different PSDs using a multi-scale computational framework. The impact of layer-wise manufacturing on densification, as well as the influences of laser beam size and scanning speed, were comprehensively explored.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Ceramics
Shicheng Zhou, Xiaowen Luan, Sang Hu, Xianjie Zhou, Sen He, Xi Wang, Hailin Zhang, Xiuli Chen, Huanfu Zhou
Summary: The addition of CeO2 improves the sintering behavior of CTSA ceramics, and when the weight percentage of CeO2 is 0.5%, the ceramics exhibit optimal microwave dielectric properties. The ceramics prepared via the RS route have superior dielectric properties compared to those prepared by the conventional solid phase reaction.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Environmental
Shiping Song, Yijun Li, Shibing Bai, Qi Wang
Summary: This study developed a method to fabricate PVDF/BaTiO3 spherical piezoelectric powder for SLS processing, which significantly improved the piezoelectric properties of the parts produced. The method is user-friendly, efficient, and environmentally friendly.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Mathematics, Interdisciplinary Applications
V Ivannikov, F. Thomsen, T. Ebel, R. Willumeit-Roemer
Summary: A novel discrete element method-based approach is proposed for modeling solid state sintering of spherical metallic powder, addressing the thermodynamical mass transport effects and mechanical interaction between particles near grain boundaries. The model consists of solving partial differential equations to describe matter flow behavior at grain boundaries and representing the mechanical interaction using 2-nodal structural elements with 6 degrees of freedom per node. Numerical implementation shows good agreement with experimental data for neck growth and shrinkage rates.
COMPUTATIONAL PARTICLE MECHANICS
(2022)
Article
Materials Science, Ceramics
Yuze Xue, Le Xin, Mingwei Zhang, Panpan Lyu, Luchao Ren, Jiwei Zhai
Summary: Double sintering effectively improves the performance of Ba0.5Sr0.5TiO3-ZnAl2O4 composite ceramics, resulting in higher density, more uniform grain size distribution, and reduced dielectric permittivity, oxygen vacancy content, and grain boundary resistance. The optimum dielectric tunability and Q value are 23.4% and 276, respectively. Double sintering is an effective strategy for adjusting the properties of composite ceramics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Manman Wang, Rumei Wang, Haiyang Dai, Tao Li, Yu Sun, Dewei Liu, Fufeng Yan, Tengda Ping
Summary: GdMnO3 ceramics were synthesized using solid state reaction and sol-gel methods, with solid phase method showing better dielectric properties and sol-gel method showing stronger magnetization.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Atul Verma, Sanath Kumar, Yen-Pei Fu
Summary: The study synthesized a bi-functional hybrid material and investigated its potential applications in photocatalysis and electrochemical sensing. The 2D-ternary hybrid showed significant activity in photocatalytic degradation and promising sensing properties towards 4-nitrophenol, demonstrating its potential application in both fields.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Pandiyarajan Anand, Dhayanantha Prabu Jaihindh, Wen-Ku Chang, Yen-Pei Fu
Summary: This study focused on the synthesis of Ca-doped narrow bandgap BiFeO3 perovskite via a simple auto combustion method, demonstrating its excellent performance in oxygen evolution reactions (OER) and wastewater treatment. By doping Ca2+ into the structure, oxygen vacancies were created and the valence state of Fe3+ was modified. The material showed promising results in the photocatalytic reduction of Cr(VI) and exhibited enhanced electrochemical OER activities in both acidic and alkaline conditions.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Physical
Ankita Mohanty, DhayananthaPrabu Jaihindh, Yen-Pei Fu, Satyaprasad P. Senanayak, Lukas Schmidt Mende, Ananthakumar Ramadoss
Summary: MOFs are emerging as new materials for supercapacitor applications due to their inherent porous characteristics. However, the insulating nature of pristine MOFs has hindered their usage in supercapacitors, leading to successful strategies such as hybridization with other materials or using MOFs as templates to derive metal oxides, carbon, or hydroxides.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Lokesh Saravanan, Ranjit A. Patil, Pangihutan Gultom, Brajesh Kumar, Arumugam Manikandan, Yen-Pei Fu, Yu-Lun Chueh, Chia-Liang Cheng, Wang-Chi Yeh, Yuan-Ron Ma
Summary: In this study, carbon-shelled titanium dioxide nanowires were successfully synthesized through chemical vapor deposition, with increased oxygen vacancies observed at higher growth temperatures, resulting in enhanced visible light absorption and improved photocatalytic degradation of methylene blue dye.
Article
Chemistry, Physical
Atul Verma, Pandiyarajan Anand, Sanath Kumar, Yen-Pei Fu
Summary: A Cu-cuprous/cupric oxide-based family of catalysts was synthesized via hydrothermal technique and their effects on 4-NP conversion and HER were investigated. Through intensive characterizations, two best catalysts for each application were selected based on their performance in different mechanisms.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Subramanian Moscow, Veerappan Kavinkumar, Masilamani Sriramkumar, S. Prabath Reshmi Kalaikathir, Kandasamy Jothivenkatachalam, Yen-Pei Fu, Srinivasan Anandan
Summary: In this study, a facile microwave route was used to synthesize Tin (Sn) and Zirconium (Zr) doped BiVO4 nanomaterials, which exhibited enhanced photocatalytic and photoelectrochemical performance. Various characterization techniques were employed to evaluate the impact of metal doping on the crystal structure, optical properties, electrical properties, and photocatalytic activity. The results showed that metal doping effectively created heterostructured nanomaterials, reducing recombination processes and improving the overall performance.
Article
Chemistry, Physical
Atul Verma, Yi-An Hong, Anren Hu, Yen-Pei Fu
Summary: Optimization of Cu2O morphology using NH4OH has rarely been explored. In this study, the influence of NH4OH on Cu2O morphology was investigated, and the spherical shape was transformed into octahedron-like octaspheres. The {100} facets at the corners of the Cu2O octaspheres could be etched. The morphology variations and facet etchings were studied using FESEM images and XRD analysis, showing a peak shift in Cu2O (111). Cu2O was then hybridized with rGO and g-C3N4 to form a ternary hybrid CGR, which effectively degraded the antibiotic pollutant tetracycline.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Pandiyarajan Anand, Atul Verma, Yi-An Hong, Anren Hu, Dhayanantha Prabu Jaihindh, Ming-Show Wong, Yen-Pei Fu
Summary: In this study, deep eutectic solvents (DES) were used to assist the synthesis of BiOCl/BiVO4 heterostructured catalyst, which was applied in electrochemical uric acid (UA) sensor and tetracycline photocatalytic degradation. The chemical composition of the catalyst was analyzed by X-ray photo-electron spectroscopy (XPS). UV-vis spectroscopy revealed increased visible light absorption and narrowing band gap energy for BiOCl/BiVO4-TU. The morphology of the catalyst was analyzed using FE-SEM and TEM, and the increased lifetime of e -/h+ pair after heterostructure formation was confirmed by TRPL.
Article
Chemistry, Multidisciplinary
S. Kumar, P. -h. Weng, Y. -p. Fu
Summary: This study focuses on the development and characterization of a core-shell-structured CuO@Ni-MOF electrocatalyst on copper foam. The developed electrode exhibits promising properties for supercapacitors and oxygen evolution reaction. The specific capacitance and cycle ability of the CuO@Ni-MOF electrode are significantly higher than those of the pistachio-derived activated carbon (PAC) electrode. A bio-based asymmetric supercapacitor is fabricated using the CuO@Ni-MOF electrode and PAC-18 as positive and negative electrodes, respectively, showing good energy and power densities with high stability. Additionally, CuO@Ni-MOF demonstrates excellent stability and low over potential in the alkaline condition for oxygen evolution reaction.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Electrochemistry
Sanath Kumar, Yen-Pei Fu
Summary: The dual morphology of ZnCo2O4 coupled with g-C3N4 was synthesized via hydrothermal method. The electro-catalyst showed enhanced electrochemical performance for hydrogen peroxide synthesis and methanol oxidation reaction. The dual morphology exhibited more active sites and higher diffusion coefficient compared to Co3O4 and ZnCo2O4. In hydrogen peroxide synthesis, the composite electro-catalyst achieved high electron transfer number and selectivity. In methanol oxidation reaction, it showed high current density and excellent stability in alkaline-based electrolyte.
ELECTROCHIMICA ACTA
(2023)
Article
Energy & Fuels
Sanath Kumar, Yen-Pei Fu
Summary: In this study, layered double hydroxides (LDH) with Zn and Co were synthesized and coupled with polyaniline-derived porous carbon (PC). The synthesized electro-catalysts showed excellent performance in terms of specific capacitance, energy density, and operational stability. This research is of great significance for energy storage and conversion.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Veerappan Kavinkumar, Atul Verma, Kandasamy Jothivenkatachalam, Yen-Pei Fu
Summary: This study presents a microwave-assisted synthesis method to develop CuO-decorated Bi3.84W0.16O6.24/Bi2WO6 dual-functional nanohybrids for electrochemical hydrogen evolution reaction (HER) and photocatalytic Cr(VI) reduction applications. The CuO1.0/biphase-BW catalyst exhibits excellent HER activity in neutral media with a low overpotential and Tafel slope. The CuO1.0/biphase-BW catalyst-coated carbon cloth also demonstrates good conductivity and electrochemical stability. The tremendous activity of the synthesized catalyst is attributed to the formation and electronic interaction of CuO with biphase Bi3.84W0.16O6.24/Bi2WO6, increasing surface-active sites and charge transfer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
S. Kumar, P. -h. Weng, Y. -p. Fu
Summary: The focus of this study is on tuning the capacitive performance of nanostructured nickel-metal-organic framework (Ni-MOF) as a high-performance electrode material for supercapacitors. The performance enhancement is achieved by selecting a material combination that includes a metal oxide, carbonaceous, conductive polymer comprising nickel oxide/graphitic carbon nitride/polyaniline. Various characterization tools are used to confirm the properties of the tuned quaternary composite, which exhibits a battery-type storage mechanism and delivers high specific capacitance and retention ability. The fabricated supercapacitors show excellent stability and higher energy density compared to ternary-based supercapacitors.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Atul Verma, Esakkinaveen Dhanaraman, Wen-Ting Chen, Yen-Pei Fu
Summary: Photocatalytic N-2 fixation is a complex reaction, which requires the design and analysis of highly efficient materials. In this study, one-pot hydrothermal Bi2WO6-BiOCl heterojunctions were synthesized by adjusting the molar ratio of tungsten and chlorine precursor. The formation of a p-n heterojunction between Bi2WO6 and BiOCl resulted in a reduction of the work function and improved catalytic performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Multidisciplinary
Adi Subardi, Ade Indra, Jan Setiawan, Yen-Pei Fu
Summary: The double perovskite SmBa0.8Sr0.2Co2O5+delta (SBSC82) was synthesized and evaluated as a cathode material for solid oxide fuel cells (SOFCs) operating at intermediate temperatures. The SBSC82 cathode powder was prepared using a solid-state reaction method and characterized using XRD and SEM. The oxygen content of the SBSC82 cathode was measured using a thermogravimetric analyzer. The SBSC82 oxide exhibited a perovskite-type structure with a tetragonal P4/mmm symmetry. The symmetrical cell with SDC|SBCS82|SDC configuration showed a polarization resistance (Rp) of 0.420 Ω.cm2, 0.091 Ω.cm2, and 0.041 Ω.cm2 at 650°C, 750°C, and 850°C, respectively. The single cell specimen achieved a power density of 377 mW/cm2 under humidified air/hydrogen.
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2023)
