Article
Chemistry, Analytical
Kseniya Prikhodko, Abulkosim Nasriddinov, Svetlana Vladimirova, Marina Rumyantseva, Alexander Gaskov
Summary: In this study, p-type oxide semiconductors Co3O4 and complex oxides NixCo3-xO4 (x = 0.04, 0.07, 0.1) were investigated for sub-ppm H2S sensing in dry and humid air. The sensor signal decreased with increasing Ni content due to a decrease in chemisorbed surface oxygen species, while it increased with rising relative humidity, indicating better surface regeneration and reactivity of surface hydroxyl groups.
Article
Chemistry, Analytical
Takafumi Akamatsu, Toshio Itoh, Akihiro Tsuruta, Yoshitake Masuda
Summary: Resistive-type semiconductor-based gas sensors were fabricated for detecting methyl mercaptan and hydrogen sulfide, with VWT particles deposited on electrodes. The resistance of VWT gas sensor decreased with increasing gas concentrations, showing high responses and good gas selectivity against hydrogen at 300 degrees C for 3 wt.% vanadium oxide-containing sensors.
Article
Engineering, Electrical & Electronic
Jinwoo Park, Seongbin Hong, Yujeong Jeong, Gyuweon Jung, Wonjun Shin, Donghee Kim, Chayoung Lee, Jong-Ho Lee
Summary: The H2S gas sensing characteristics of a polysilicon control-gate (CG) FET-type gas sensor were studied. A 15 nm thick layer of In2O3 deposited via radio frequency magnetron sputtering was used as the sensing material. The modified FET-type gas sensor with polysilicon control-gate showed better gas sensing characteristics, especially when the VCG2 terminal was open. The sensing mechanism for detecting H2S gas in FET-type gas sensors was examined, and the sensor was able to detect up to 5 ppm of H2S gas.
SOLID-STATE ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Junjie Wang, Shangshu Wu, Shu Fu, Sinan Liu, Zhiqiang Ren, Mengyang Yan, Shuangqin Chen, Si Lan, Horst Hahn, Tao Feng
Summary: A nanocrystalline CoCrFeNiMn high-entropy alloy with nano-multiphase structure was prepared by laser evaporation source using inert gas condensation, exhibiting unexpected ferromagnetic behavior and significantly increased Curie temperature. The saturation magnetization and Curie temperature of the alloy can be controlled through heat treatment, attributed to the formation and structural evolution of magnetic nanophases during annealing, expanding the design toolbox for high-performance nc-HEAs based on laser-IGC technique.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Qiang Hu, Wenjian Zhang, Xiaoyu Wang, Qiao Wang, Baoyu Huang, Yan Li, Xiaohui Hua, Guo Liu, Bingsheng Li, Jinyuan Zhou, Erqing Xie, Zhenxing Zhang
Summary: CuO nanoneedle arrays sensor prepared without binders exhibit high specific surface area and decent response, but sensitive to humidity. It also shows good selectivity and stability to low concentration of H2S.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Fernanda K. F. Oliveira, Anderson A. G. Santiago, Ariadne C. Catto, Luis F. da Silva, Ricardo L. Tranquilin, Elson Longo, Fabiana Motta, Mauricio R. D. Bomio
Summary: Metal molybdate compounds have been widely studied for their technological applications. In this study, cerium molybdate nanocrystals were synthesized via a controllable method and the effect of microwave-assisted hydrothermal treatment on their properties was investigated. The results showed changes in crystal structure and morphology, enhanced photoluminescence, and improved gas-sensing performance with longer treatment time.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
Zhicheng Chen, Zuwei Xu, Haibo Zhao
Summary: CuO-doped SnO2 nanoparticles with different CuO mass fractions were synthesized by flame spray pyrolysis and applied to thin-film gas sensors for H2S detection. The optimal sensor with 0.5 wt% CuO doping showed the highest response to 10 ppm H2S at 125 degrees C, indicating its potential for practical industrial applications.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Electrochemistry
Tiantian Qiu, Na Luo, Mengmeng Guo, Haijie Cai, Zhixuan Cheng, Jiaqiang Xu
Summary: Constructing a porous structure has been proven to be an effective way to improve the gas sensing properties of metal oxide semiconducting materials. In this study, high-performance hydrogen sulfide gas sensing materials with a porous structure were synthesized by growing nickel oxide on vanadium trioxide seeds. These materials exhibit high response, fast response time, wide linear range, and good stability.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ahmad Ayesh, S. A. Alghamdi, Belal Salah, S. H. Bennett, C. Crean, P. J. Sellin
Summary: In this study, a high sensitivity H2S gas sensor based on perovskite nanoparticles was developed. The sensor was synthesized using a relatively simple solution-growth method and exhibited a high sensitivity to H2S gas, with a fast response time.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Analytical
Suqin Xiong, Shuguang Yan, Lichun Zhang, Yi Lv
Summary: Fluorine-functionalized graphitic carbon nitride enhances the detection response to H2S, showing higher sensitivity and longer lifespan. The F-gC(3)N(4)-based sensor also exhibits higher CTL responses in the range of 1.27 to 64.00 μg/mL, with a lower detection limit of 0.07 μg/mL compared to previously reported metal-free catalyst-based sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Dawei Shi, Mengqi Ye, Liang Zhao, Chao Fu, Menqiu Zheng, Xianfeng Xu, Lisha Xu, Jiyu Fan
Summary: The La0.88Sr0.12MnO3 nanocrystalline, synthesized by sol-gel chemical method, undergoes a typical paramagnetic-ferromagnetic phase transition at 280 K. Critical behavior analysis of magnetization isotherms using various techniques confirms accurate critical exponents (β = 0.5936(2) and γ = 1.0928(6)). These exponents satisfy the Widom scaling relation δ = 1 + γ/β and the single scaling equation of H/M-δ = h(ε/H-1/β). The slight deviation of the obtained critical exponents from theoretical values is attributed to the inherent disorder effect caused by the reduction of La0.88Sr0.12MnO3 particle size to the nanoscale.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Wenbo Qin, Renze Zhang, Zhenyu Yuan, Yanbai Shen, Gongming Wang, Fanli Meng
Summary: By using a citric acid etching method to optimize the surface structure of perovskite LaFeO3, the acetone sensing properties of the material can be significantly improved. The etched samples show a 12 times higher response to 20 ppm acetone compared to the pristine samples, while also exhibiting low detection limits, good selectivity, and stability.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Shama Sadaf, Hongpeng Zhang, Ali Akhtar
Summary: In this study, a series of MoS2 and NiO nanocomposites were synthesized and used for detecting low concentrations of H2S gas. The MNO-10 gas sensor exhibited the highest response value, good selectivity, and long-term stability.
Article
Chemistry, Analytical
Qin Zhou, Hongjie Song, Tong Sun, Lichun Zhang, Yi Lv
Summary: In this study, WS2 nanosheets prepared through simple method exhibit excellent H2S sensing performance with low working temperature, fast response and recovery time, and improved catalytic properties. A possible sensing mechanism involving the formation of WS2/WO3 hybrids is proposed, contributing to the repeatability of the sensor and offering a new perspective on the mechanism of H2S gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Yaoyu Yin, Yanbai Shen, Sikai Zhao, Jinzhou Bai, Yaozhong Qi, Cong Han, Dezhou Wei
Summary: Noble metal-doped ZnSnO3 nanocubes were prepared via a one-step hydrothermal route and their ethanol sensing properties were investigated. The Ag-ZnSnO3 nanocubes showed the highest response to ethanol gas with great potential for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
