Article
Chemistry, Analytical
Ravish K. Jain, Atul Khanna
Summary: WO3 and CuO-doped WO3 thin films were prepared by electron beam evaporation and annealed to crystallize into monoclinic phase. CuO doping significantly enhanced the H2S response of the films, improving both response and recovery transients.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Xingyu Yao, Jinbo Zhao, Jiurong Liu, Fenglong Wang, Lili Wu, Fanjun Meng, Dashun Zhang, Rutao Wang, Jahangeer Ahmed, Kasinath Ojha
Summary: Pt-loaded WO3 materials were synthesized using hydrothermal and chemical reduction methods. The Pt-WO3 nanorods showed excellent gas sensing selectivity to H2S, with 0.2 at% Pt-WO3 exhibiting high response, short response/recovery time, and low detection limit. The superior performance of Pt-WO3 compared to pure WO3 is attributed to its modulation of conductive band electrons and catalysis of chemisorption reactions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Hui-Dong Qian, Jung Tae Lim, Jong-Woo Kim, Yang Yang, Tian Hong Zhou, Su Yeon An, Han Kook Jeon, Kyung Mox Cho, Jihoon Park, Chul-Jin Choi
Summary: Si doping has a significant effect on the crystallization and magnetic properties of Sm(Fe0.8Co0.2)(11)Ti, leading to an increase in coercivity and a decrease in magnetization. The presence of Si resulted in the formation of submicron-sized grains with high crystallinity in the ribbons, while the bulks showed varying crystallized phases with different Si concentrations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Matawee Punginsang, Dario Zappa, Elisabetta Comini, Anurat Wisitsoraat, Giorgio Sberveglieri, Andrea Ponzoni, Chaikarn Liewhiran
Summary: In this study, sensors based on WO3 nanowires sensing films were fabricated by thermal oxidation method on alumina substrates and functionalized with gold nanoparticles by RF magnetron sputtering. An optimal sputtering time of 10 seconds led to significantly enhanced sensing performances towards H2S, with a detection limit of 0.17 ppb for 5 ppm at 350 degrees C and 50% relative humidity.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Maciej J. Szary
Summary: This study investigates doping of MoS2 for enhanced H2S detection, finding that phosphorus increases charge transfer during H2S adsorption compared to pristine MoS2, while Ge and Cl doping show no benefit. Doping does not hinder the recovery of adsorption sites, and H2S adsorption energy is significantly higher than O-2 and N-2.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Tran Thi Ngoc Hoa, Dang Thi Thanh Le, Nguyen Van Toan, Nguyen Van Duy, Chu Manh Hung, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: In this study, WO3-coated SnO2 nanowires were fabricated for H2S gas sensors, showing good sensitivity and selectivity to low-concentration H2S gas at 200 degrees Celsius. The gas-sensing mechanism was discussed based on the n-n heterojunction between n-type SnO2 and n-type WO3, enhancing sensitivity to H2S.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Kenneth H. Eckelmeyer, Gerard M. Ludtka, Gail Mackiewicz-Ludtka, Lloyd R. Chapman, A. D. Romig
Summary: The effect of Ti content on phase transformations, microstructures, and mechanical properties of U-Ti alloys are described. Higher cooling rates are required with increasing Ti content. Full quenching results in diffusionless transformation of gamma-phase to supersaturated variants of alpha-phase. The quenching method leads to different microstructures and mechanical properties.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Linjie Jian, Rong Peng, Youzhou He, Xingmin Wang, Weiwei Guo
Summary: In this study, urchin-like WO3 was successfully synthesized using a one-step hydrothermal method. The crystal structure, chemical composition, morphology, specific surface area, and gas sensing properties of WO3 were evaluated using various instruments. The results showed that the urchin-like WO3 gas sensor exhibited high response, selectivity, repeatability, and stability towards 30 ppm ammonia, indicating its potential as a candidate material for ammonia monitoring.
Article
Engineering, Electrical & Electronic
Yanghai Gui, Jintao Wu, Kuan Tian, Huishi Guo, Xiaoyun Qin, Xiaomei Qin, Xiang Guo, Canxiang Fang, Peng Liu
Summary: In this study, Ag/WO3/reduced graphene oxide (rGO) nanocomposites were synthesized successfully and exhibited remarkable selectivity towards H2S. The gas sensing performance of Ag-doped WO3/rGO sensors was significantly better than that of WO3/rGO, and the performance was further enhanced under ultraviolet (UV) irradiation. This study offers a potential application for H2S detection in environmental monitoring and smart healthcare.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Mateusz Morawiec, Anna Wojtacha, Marek Opiela
Summary: This study investigates the phase transformation kinetics of high strength low-alloy steel (HSLA) during continuous cooling. Experimental results show changes in microstructure, including ferrite, bainitic ferrite, and bainite, at different cooling rates. Increasing the cooling rate reduces the amount of retained austenite in the steel microstructure and affects its mechanical properties.
Article
Chemistry, Analytical
Xi Wang, Jingyuan Lu, Wenjiang Han, Pengfei Cheng, Yinglin Wang, Jianbo Sun, Jian Ma, Peng Sun, Hong Zhang, Yanfeng Sun, Geyu Lu
Summary: By applying carbon modification on coral-like WO3 using a one-step solvothermal method, the response time and long-term stability of the H2S sensor are improved.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Yongguang Wang, Longchao Yao, Linjie Xu, Weihong Wu, Wenhao Lin, Chenghang Zheng, Yuanqun Feng, Xiang Gao
Summary: Hierarchical WO3 hollow microspheres were successfully synthesized and applied in gas sensors, showing high sensitivity, selectivity, repeatability, and response/recovery characteristics towards NO gas, mainly due to their unique structure with high specific surface area and effective gas diffusion ability.
Article
Chemistry, Physical
O. B. Perevalova, M. S. Syrtanov
Summary: The microstructure and phase composition of the EBAM Ti-6Al-4 V alloy samples during heating were studied using in situ high temperature synchrotron X-ray diffraction and transmission electron microscopy (TEM). The formation of a new α'' phase and the lattice distortion of the α phase were observed, and the dependence of phase composition on heating temperature was revealed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Lewen Nie, Xingwu Guo, Chenjing Gao, Xuan Wu, Juan Chen, Liming Peng
Summary: Hierarchical ZnO/WO3 composite films with ordered porous ZnO and slender WO3 nanowires structure were successfully prepared by the colloidal template method and solvothermal method. After loading Pt catalyst, the composite films exhibited a shorter response time to H2 gas and a decreased transmittance at room temperature.
Article
Metallurgy & Metallurgical Engineering
Tang Ya-qin, Jiang Di, Wang Huan, Zheng Hong-ye, Ren Lu-jun, Wei Kui-xian, Ma Wen-hui, Dai Yong-nian, Luo Da-jun, Zhang Xue-liang, Liu Yi-ke
Summary: In this study, Ti-doped WO3 nanoplate arrays were successfully designed on fluoride-doped tin oxide by a seed-free hydrothermal method to improve the photoelectrochemical performance. The optimal Ti-doped WO3 electrode achieved a higher photocurrent density at 0.6 V compared to pure WO3 nanoplate arrays, with a significant cathodic shift in the onset potential observed after doping.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)