Enhanced Gas Sensing Properties of SnO2 Hollow Spheres Decorated with CeO2 Nanoparticles Heterostructure Composite Materials

Jiangyang Liu, Mingjun Dai, Tianshuang Wang, Peng Sun, Xishuang Liang, Geyu Lu, Kengo Shimanoe, Noboru Yamazoe

Research output: Contribution to journalArticle

139 Citations (Scopus)

Abstract

CeO2 decorated SnO2 hollow spheres were successfully synthesized via a two-step hydrothermal strategy. The morphology and structures of as-obtained CeO2/SnO2 composites were analyzed by various kinds of techniques. The SnO2 hollow spheres with uniform size around 300 nm were self-assembled with SnO2 nanoparticles and were hollow with a diameter of about 100 nm. The CeO2 nanoparticles on the surface of SnO2 hollow spheres could be clearly observed. X-ray photoelectron spectroscopy results confirmed the existence of Ce3+ and the increased amount of both chemisorbed oxygen and oxygen vacancy after the CeO2 decorated. Compared with pure SnO2 hollow spheres, such composites revealed excellent enhanced sensing properties to ethanol. When the ethanol concentration was 100 ppm, the sensitivity of the CeO2/SnO2 composites was 37, which was 2.65-times higher than that of the primary SnO2 hollow spheres. The sensing mechanism of the enhanced gas sensing properties was also discussed.

Original languageEnglish
Pages (from-to)6669-6677
Number of pages9
JournalACS Applied Materials and Interfaces
Volume8
Issue number10
DOIs
Publication statusPublished - Mar 16 2016

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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