A facile in-situ etching route to hollow C@SnO2 nanocomposites and their gas-sensing properties. (July 2018)

• Record Type: Journal Article
• Authors: Jiao, Zheng; Gao, Dongdong; Wang, Yijia; Zhang, Haijiao
• Is Part Of: Materials research bulletin. Volume 103(2018)
• Page Start: 319
• Page End: 325
• Publication Date: 2018-07
• Subjects: C@SnO2 -- Hollow nanocomposites -- Nanosheets -- In-situ etching -- Gas-sensing properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.03.038
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Hollow C@SnO2 nanostructure has been designed via a facile in-situ etching technique.. The C@SnO2 products possess a high surface are and a hollow carbon core. The growth of SnO2 nanosheets and the removal of silica template can be synchronously performed. The C@SnO2 products manifest highly sensitive and selective to n-butanol as gas-sensing sensor. Abstract: A novel hollow carbon@SnO2 nanocomposite has been developed via a high cost-effective and facile in-situ etching technique. The as-prepared C@SnO2 product has a high surface area of about 115 m 2 g −1 and a hollow carbon core, where a lot of SnO2 nanosheets grow onto the carbon shell. Particularly, the silica core as the sacrificial template can be fully removed by hydrofluoric acid (HF) byproduct during the reaction process. Moreover, the deposition of SnO2 sheets and the removal of the silica template can be synchronously performed by a simple one-step process. When applied as the gas-sensing material, the C@SnO2 product manifests highly sensitive and selective to n-butanol. The large surface area, hollow nanostructure and the perfect combination of SnO2 nanosheets and carbon layer contribute to the enhanced gas-sensing performances. The method described in our work can also be employed to design other hollow metal oxides@carbon hybrids for energy storage and catalysis.