Journal ArticleDOI
Enhanced formaldehyde detection based on Ni doping of SnO2 nanoparticles by one-step synthesis
Jun Hu,Tao Wang,Yanjie Wang,Da Huang,Guili He,Yutong Han,Nantao Hu,Yanjie Su,Zhihua Zhou,Yafei Zhang,Zhi Yang +10 more
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In this paper, Ni-doped SnO2 nanoparticles with Ni doping were synthesized via a facile one-step hydrothermal route, which led to significant enhanced response to formaldehyde (HCHO).Abstract:
In this work, SnO2 nanoparticles with Ni doping were synthesized via a facile one-step hydrothermal route. The addition of Ni to SnO2 lead to significant enhanced response to formaldehyde (HCHO). The Ni-doped SnO2 materials were used to fabricate HCHO gas sensors and the comprehensive HCHO-sensing properties under diverse working temperatures were tested and studied. With suitable Ni concentration, the SnO2 nanoparticles exhibited a 10 times sensing enhancement with high gas response, excellent selectivity and good stability. Furthermore, the limit of detection (LOD) was experimentally figured out to be as low as 120 ppb, which is much lower than the threshold exposure limit of HCHO proposed by American Conference of Governmental Industrial Hygienists. Importantly, the excellent performances of the as-fabricated gas-sensing devices make Ni-doped SnO2 a promising candidate for HCHO sensing applications. This synthesis strategy here can also give guidance for designing high-performance HCHO gas sensors.read more
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Role of Oxygen Vacancies in Nanostructured Metal-Oxide Gas Sensors: A Review
TL;DR: In this article, the role of surface and bulk oxygen vacancies in metal oxide gas sensors is discussed and the influence of surface oxygen vacancies on factors affecting adsorption, such as surface structure, are examined to gain understanding on improved sensing performance.
Journal ArticleDOI
Ultrasensitive room temperature NO2 sensors based on liquid phase exfoliated WSe2 nanosheets
Rensong Guo,Yutong Han,Chen Su,Xinwei Chen,Min Zeng,Nantao Hu,Yanjie Su,Zhihua Zhou,Hao Wei,Zhi Yang +9 more
TL;DR: In this article, a simple and effective method has been developed to exfoliate tungsten diselenide (WSe2) into few-layered nanosheets with N-methyl-2-pyrrolidone (NMP) as a dispersant.
Journal ArticleDOI
Two-dimensional Cd-doped porous Co3O4 nanosheets for enhanced room-temperature NO2 sensing performance
Xinwei Chen,Wang Shuai,Chen Su,Yutong Han,Cheng Zou,Min Zeng,Nantao Hu,Yanjie Su,Zhihua Zhou,Zhi Yang +9 more
TL;DR: In this paper, a two-dimensional (2D) Cd-doped porous Co3O4 nanosheets through a microwave-assisted solvothermal method and subsequently in-situ annealing process were designed and fabricated.
Journal ArticleDOI
Dual-mode gas sensor for ultrasensitive and highly selective detection of xylene and toluene using Nb-doped NiO hollow spheres
TL;DR: In this article, a single gas sensor with dual functionality for ultrasensitive and highly selective detection of p-xylene and toluene was designed using NiO hollow spheres doped with Nb.
Journal ArticleDOI
Enhanced gas sensing performance based on p-NiS/n-In2O3 heterojunction nanocomposites
Xin-Yu Huang,Zong-Tao Chi,Jian Liu,Dong-Hua Li,Xiao-Jun Sun,Cong Yan,Yu-Chong Wang,Hao Li,Xue-Dong Wang,Wanfeng Xie +9 more
TL;DR: In this article, the p-n heterojunction in multi-component phases of NiS and In2O3 nanofibers is exploited for detecting volatile organic compounds.
References
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Detection of CO and O2 Using Tin Oxide Nanowire Sensors
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A solution-phase, precursor route to polycrystalline SnO2 nanowires that can be used for gas sensing under ambient conditions.
TL;DR: It is demonstrated that this new approach could be extended to generate polycrystalline nanowires of other metal oxides such as In2O3 and anatase TiO2 and could be used for gas sensing with improved sensitivity and reversibility under ambient conditions.