期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 620, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.126606
关键词
Breath analysis; Isoprene; Flower-like nanorods clusters; Gas sensor
资金
- NSAF [U1930205]
- Shenzhen Science and Technology Innovation Commission [JSGG20191129102808151]
- Fundamental Research Funds for the Central Universities [xzd012019020]
- Key Research and Development Projects of Shaanxi Province [2019GY121, 2020GY137]
- International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies
The Cr2O3-doped In2O3 sensor showed reliable detection ability for trace isoprene at concentrations below 5 ppb, exhibiting good long-term stability, strong selectivity towards common breathing gases, and resistance to humidity at different levels of ambient humidity.
Isoprene is a typical biomarker for nonalcoholic fatty liver disease (NAFLD) and can be used for early screening in breath diagnosis. In this study, a simple hydrothermal synthesis of flower-like Cr2O3-doped In2O3 nanorods clusters materials for ultra-low isoprene detection was reported. This special flower-like nanorods clusters structure has the large specific surface area and the Cr2O3 doping improves in the distribution of different oxygen components, crystallite size, and carrier concentration, which synthetically contributes to the enhanced isoprene sensing performance. The results show that among all the sensors, the 1 wt% Cr2O3-doped In2O3 sensor exhibits reliable ppb-level detection ability with a concentration less than 5 ppb. Meanwhile, the sensor shows good longterm stability for 4 weeks and considerable selectivity over other common breathing gases (benzene, acetone, octane, pentane, ethanol, ammonia, and nitrogen dioxide). Furthermore, the sensor has good humidity resistance under different ambient humidity (0?92% RH). Thus, we believe the sensor based on the flower-like Cr2O3-doped In2O3 nanorods clusters has a potential application value for the detection of trace isoprene in breath analysis.
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