Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 338, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.129869
Keywords
Zinc tin oxide; Microwave-assisted hydrothermal synthesis; Gas sensor; Volatile monitoring; TEA; Human health
Funding
- National Council for Scientific and Technological Development (CNPq) [129371/20190, 308327/2018-7]
- Sao Paulo Research Foundation (FAPESP) [2020/06421-1, 2020/05233-7, 2018/01258-5, 2018/00033-0, 2017/01267-1, 2016/25267-8]
- LSQA/IBILCE/Unesp
- LNNano/CNPEM [24622]
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This study successfully synthesized highly sensitive and selective NC-ZnSnO3 for TEA detection, demonstrating excellent response properties for various VOCs and a low detection limit for TEA.
Triethylamine (TEA), a volatile organic compound (VOC), is present in several industrial processes and is harmful to human health. Therefore, the development of highly sensitive TEA sensors is desirable. Semiconductor metal oxides (SMOx) have been widely used for VOCs detection due to their efficiency and feasibility. Herein, we report the template-free synthesis of zinc stannate nanocubes (NC-ZnSnO3) by the microwave-assisted hydrothermal method followed by a calcination step. The sample?s sensing properties were investigated for different VOCs (methanol, ethanol, isopropanol, acetic acid, acetone, 2-butanone, acetaldehyde, benzene, toluene, m-xylene, and TEA). The sensor presented an improved selectivity toward TEA, showing the highest response of 57.5 to 100 ppm of TEA with a fast response time of 4 s at the optimum operating temperature of 350 ?C. The NC-ZnSnO3 also showed a low detection limit for TEA of about 0.6 ppm. In summary, this work described an efficient method for producing NC-ZnSnO3 and demonstrated that this material has high selectivity and sensitivity for TEA detection.
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