Layer-by-layer nanocomposites consisting of Co3O4 and reduced graphene (rGO) nanosheets for high selectivity ethanol gas sensors

• DOI: 10.1016/j.apsusc.2019.02.148
• Publication Date: 2019-02-16T10:51:17Z
• Authors: Menghan Tian; Jiayu Miao; Pengfei Cheng; Hongchen Mu; Jinchun Tu; Jianbo Sun
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract Layer-by-layer nanocomposites consisting of Co3O4 and reduced graphene (rGO) nanosheets were synthesized by a simple hydrothermal process with the annealing step. We investigated their gas sensing performances towards several volatile organic compounds (VOCs). Composites showed high response, excellent circularity and long-term stability as ethanol sensors operating at 200 °C. Nanocomposite with 15 wt% of rGO exhibited the best sensitivity. The gas sensing mechanism of the composite to ethanol is discussed in detail.