A comparative study on the NH3 gas-sensing properties of ZnO, SnO2, and WO3 nanowires
by Nguyen Van Hieu, Dang Thi Thanh Le, Nguyen Duc Khoang, Nguyen Van Quy, Nguyen Duc Hoa, Phuong Dinh Tam, Anh-Tuan Le, Tran Trung
International Journal of Nanotechnology (IJNT), Vol. 8, No. 3/4/5, 2011

Abstract: In this work, a large quantity of ZnO, SnO2 and WO3 nanowires (NWs) was successfully synthesised by simple and efficient methods. Their morphology and microstructure were characterised by FE-SEM, TEM, XRD, PL, and Raman. The NH3 gas-sensing properties of these NWs were investigated and compared. It was found that the responses and response-recovery time of SnO2 and WO3 NWs sensors to NH3 gas are relatively comparable, and they have a better NH3 gas-sensing performance than that of ZnO NWs sensor. In addition, the SnO2 NWs sensor has the lowest operating temperature.

Online publication date: Fri, 21-Jan-2011

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