An excellent triethylamine (TEA) sensor based on unique hierarchical MoS2/ZnO composites composed of porous microspheres and nanosheets

A convenient two-step hydrothermal method was used to prepare unique hierarchical MoS2/ZnO composites composed of porous microspheres and nanosheets. The gas sensing properties of MoS2/ZnO composite sensor was investigated. Compared with pure MoS2, the MoS2/ZnO composite sensor shows a remarkably increased response of 23.57 to triethylamine (TEA). In addition, the much shorter recovery time for MoS2/ZnO sensor is a sharp contrast to the terribly bad desorption ability of pure MoS2. The prepared MoS2/ZnO gas sensor can achieve a recovery rate of over 90 % after 134 s without using auxiliary means. The composite material also presents strong anti-interference ability and outstanding selectivity. The excellent sensing performances of MoS2/ZnO composite sensor may be attributed to the n-n composite heterojunction and the abundant diffusion channels originated from the unique microstructure. Our research work may provide a valuable strategy for preparing high-performance TEA sensor with low-cost.