标题：In2O3-SnO2 hybrid porous nanostructures delivering enhanced formaldehyde sensing performance
作者：Ge, Wenwen; Chang, Yuhong; Natarajan, Vinothkumar; Feng, Zhenyu; Zhan, Jinhua; Ma, Xicheng
作者机构：[Ge, Wenwen; Chang, Yuhong; Natarajan, Vinothkumar; Feng, Zhenyu; Zhan, Jinhua; Ma, Xicheng] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shando 更多
通讯作者：Zhan, JH;Ma, XC
通讯作者地址：[Zhan, JH; Ma, XC]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China.
来源：JOURNAL OF ALLOYS AND COMPOUNDS
关键词：Gas sensor; SnO2; In2O3; Formaldehyde; Hybrid nanostructures
摘要：Novel In2O3-SnO2 hybrid sensing nanostructures with porous nature were successfully prepared and characterized by various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). Gas sensing properties of the fabricated sensor based on the as-prepared In2O3-SnO2 hybrid nanostructures were systematically investigated and compared with those of pure SnO2. The hybrid nanostructures containing 3% In2O3 exhibit the highest response value of 30.7-100 ppm formaldehyde at 100 degrees C, which was 14 times higher than that of pure SnO2. Moreover, gas sensors based on the as-prepared In2O3-SnO2 hybrid nanostructures also exhibit high stability and good selectivity for formaldehyde. The enhanced sensing performances of formaldehyde were mainly attributed to the formation of n-n heterojunctions and the synergistic interaction between In2O3 and SnO2. (c) 2018 Elsevier B.V. All rights reserved.