Preparation of Planar C2H5OH Fast Response Gas Sensor

doi:10.7503/cjcu20200110

Abstract

Abstract: A nanostructured InN-In₂O₃ composite material was prepared by chemical synthesis. Based on the synthetic material, we prepared a fast-response gas sensor for the detection of ethanol gas. Nano-sized In₂O₃ particles were synthesized by hydrothermal method, spin-coated on a ceramic substrate, and obtained an InN substrate after nitriding treatment. The InN substrate was then oxidized to synthesize a gas-sensitive material and a sensor device was prepared on a miniature planar electrode sheet. The morphology and composition of the materials were characterized and analyzed by means of scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffractometer(XRD), and X-ray photoelectron spectroscopy(XPS). The results showed that the final InN-In₂O₃ nanocomposite with a pine-like structure was presented. The corresponding gas-sensitive performance of the device was also tested, and it was proved that the flat-type gas-sensitive sensor prepared based on this material has good gas-sensitive performance for ethanol gas:The sensitivity of detecting ethanol vapor at a concentration of 1.025 mg/m³(500 ppb) can reach 18; The response of detecting 2.05 mg/m³(1 ppm) ethanol the fastest recovery time is only 1s; the best working temperature is low, only 50℃.

Key words: Ethanol, In₂O₃, Nanocomposites, InN

CLC Number:

O614
TP212

TrendMD:

NING Qiuyang, LI Wancheng. Preparation of Planar C₂H₅OH Fast Response Gas Sensor[J]. Chem. J. Chinese Universities, 2020, 41(8): 1745.

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Preparation of Planar C₂H₅OH Fast Response Gas Sensor

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