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论文类型：期刊论文

发表时间：2014-01-01

发表刊物：RSC ADVANCES

收录刊物：SCIE、EI、Scopus

卷号：4

期号：101

页面范围：57975-57982

ISSN号：2046-2069

摘要：In the present work, single-phase CuO particles were synthesized by a hydrothermal method and characterized by SEM, TEM and XRD. The gas sensing properties of the CuO based sensor to some representative flammable VOC gases such as ethanol, isopropanol, acetone, benzene, para-xylene and decane were investigated. The sensor resistance increased when exposed to these flammable analytes, as well as when the concentration of oxygen in air decreased. That phenomenon is attributed to the surface accumulation conduction mechanism of the p-type metal oxide semiconductor, when negatively charged surface oxygen desorbs from the surface of CuO and releases electrons back to the CuO bulk. According to our research, the detection limit of the CuO based sensor to decane was better than 1 ppm, which indicated the potential applications of CuO based sensors in detecting low concentration decane.