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Ultrafine nanoparticles of W-doped SnO₂ for durable H₂S sensors with fast response and recovery.

ABSTRACT: Ultrafine nanoparticles of W-doped SnO₂ with an average diameter of 6 nm were fabricated via a facile hydrothermal method. The material shows a reduced particle size and enhanced response to H₂S gas as compared to the pristine SnO₂ nanoparticles. The detection limit can be down to 100 ppb while the response time and recovery time of the 5%-doped one are reduced to 17 s and 7 s respectively. In addition, the material shows impressive long-term stability of the response through 40 cycles of injection with 10 ppm H₂S, which is attractive for designing a durable hydrogen sulfide sensor. The doping of W results in the reduction of size and modification of the electronic band structure of SnO₂, which reduces the response time and recovery time and further improves the sensing durability of the materials.

SUBMITTER: Wang P

PROVIDER: S-EPMC9063019 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Ultrafine nanoparticles of W-doped SnO2 for durable H2S sensors with fast response and recovery.

Wang Pengjian P Hui Junfeng J Yuan Tingbiao T Chen Peng P Su Yue Y Liang Wenjie W Chen Fulin F Zheng Xiaoyan X Zhao Yuxin Y Hu Shi S

RSC advances 20190409 20

Ultrafine nanoparticles of W-doped SnO2 with an average diameter of 6 nm were fabricated via a facile hydrothermal method. The material shows a reduced particle size and enhanced response to H2S gas as compared to the pristine SnO2 nanoparticles. The detection limit can be down to 100 ppb while the response time and recovery time of the 5%-doped one are reduced to 17 s and 7 s respectively. In addition, the material shows impressive long-term stability of ...[more]

PMID: 35520261

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