The effect of near-surface electron trapping layer on the acetone sensing performance of black TiO2 capped with ZnO

Feng Yangchun; Yang Wangyang; Li YufangShen Honglie

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The effect of near-surface electron trapping layer on the acetone sensing performance of black TiO2 capped with ZnO

机译：The effect of near-surface electron trapping layer on the acetone sensing performance of black TiO2 capped with ZnO

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In recent years, high-performance acetone gas sensors have attracted great attention for their potential in noninvasive blood glucose monitoring. In this work, black TiO2 (B-TiO2) was introduced as an electron trapping layer between TiO2 and ZnO to form TiO2@B-TiO2@ZnO core-shell nanoparticles, through a simple and safe method. The acetone sensing performance of TiO2@B-TiO2@ZnO varied with the thickness of ZnO. Because of the electron trapping effect of the introduced B-TiO2 layer, the best performing sample exhibited a low optimal operating temperature of 275 degrees C and a high response of 49.25-50 ppm acetone. In addition, a low detection limit of 170 ppb was obtained. The pretty selectivity of the sample was also been proved. The mechanism of enhanced acetone response was explained by the energy band-based model of TiO2@B-TiO2@ZnO core-shell nanoparticle and depletion layer theory.

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来源
《Nanotechnology》 |2022年第27期|共11页
作者
Feng Yangchun; Yang Wangyang; Li YufangShen Honglie;
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作者单位

Nanjing Univ Aeronaut & Astronaut;

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原文格式 PDF
正文语种英语
中图分类特种结构材料;
关键词
black TiO2ZnO; acetone sensing; core-shell nanoparticle; electron trapping layer; GAS SENSOR; MASS-SPECTROMETRY; FILM; NANOPARTICLES; FABRICATION; BREATH;

The effect of near-surface electron trapping layer on the acetone sensing performance of black TiO2 capped with ZnO

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