Mesoporous In2O3: Effect of material structure on the gas sensing

Abstract

We present a semiconductor gas sensor based on mesoporous In 2O3 (m-In2O3). The m-In 2O3 was successfully fabricated by a simple sol-gel process, using block copolymer PE6800 as a soft template. The results of gas sensing reveal that the m-In2O3 prepared at room temperature shows higher resistance, which plays the key role in its greater sensitivity. The pore structure of material has an influence on gas adsorption on the material surface, which further affects response-recovery time of gas sensor. © 2011 Z. X. Cheng et al.