P1.0.1 Porous WO3-NiO Thin Films Prepared by Sol-Gel Method for Selective Acetone Gas Detection

Peng Gao, Hiuming Ji, Qianqian Jia & Yugui Zhou
Porous WO3-NiO thin films were prepared by sol-gel method. The microstructure and surface morphology were characterized by using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The acetone vapor sensing properties were investigated as functions of NiO content, acetone concentration, sintering temperature, and porous structure. Electrical properties were studied by conductivity measurement. As prepared WO3-NiO thin films show well response towards acetone gas. The sensitivity of 1.0 mol % Ni-doped WO3 thin films...