标题：In2O3-SnO2hybrid 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 ] School of Chemistry and Chemical Engineering, Shandong U 更多
来源：Journal of Alloys and Compounds
摘要：Novel In2O3-SnO2hybrid 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-SnO2hybrid nanostructures were systematically investigated and compared with those of pure SnO2. The hybrid nanostructures containing 3% In2O3exhibit the highest response value of 30.7–100 ppm formaldehyde at 100 °C, which was 14 times higher than that of pure SnO2. Moreover, gas sensors based on the as-prepared In2O3-SnO2hybrid 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 In2O3and SnO2.
© 2018 Elsevier B.V.