标题：High ethanol sensitivity of Palladium/TiO2nanobelt surface heterostructures dominated by enlarged surface area and nano-Schottky junctions
作者：Wang, Dongzhou ;Zhou, Weijia ;Hu, Peiguang ;Guan, Yu ;Chen, Limei ;Li, Jianhua ;Wang, Guancong ;Liu, Hong ;Wang, Jiyang ;Cao, Guozhong ;Jiang, Huaidon 更多 作者机构：[Wang, Dongzhou ;Zhou, Weijia ;Hu, Peiguang ;Chen, Limei ;Li, Jianhua ;Wang, Guancong ;Liu, Hong ;Wang, Jiyang ;Jiang, Huaidong ] State Key Laboratory 更多
来源：Journal of Colloid and Interface Science
摘要：TiO2nanobelts were prepared by the hydrothermal growth method. The surface of the nanobelts was coarsened by selective acid corrosion and functionalized with Pd catalyst particles. Three nanobelt samples (TiO2nanobelts, surface-coarsened TiO2nanobelts and Pd nanoparticle/TiO2nanobelt surface heterostructures) were configured as gas sensors and their sensing ability was measured. Both the surface-coarsened nanobelts and the Pd nanoparticle-decorated TiO2nanobelts exhibited dramatically improved sensitivity to ethanol vapor. Pd nanoparticle-decorated TiO2nanobelts with surface heterostructures exhibited the best sensitivity, selectivity, working temperature, response/recovery time, and reproducibility. The excellent ethanol sensing performance is attributed to the large surface area and enhancement by Schottky barrier-type junctions between the Pd nanoparticles and TiO2nanobelts. © 2012 Elsevier Inc.