Facile synthesis and characterization of Chrysotile/SnO2 nanocomposite for enhanced photocatalytic properties. (2nd January 2020)

• Record Type: Journal Article
• Authors: Luo, Qianqian; Peng, Hongxia; Tian, Xiuying; Guo, Jun
• Is Part Of: Applied organometallic chemistry. Volume 34:Number 3(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-01-02
• Subjects: chrysotile -- nanocomposite -- photocatalytic -- SnO2; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.5356
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract: SnO2 nanocrystals grown on chrysotile surfaces could be facilely synthesized in large quantities through a direct precipitation process coupled with a calcination treatment. The as‐synthesized chrysotile/SnO2 nanocomposites showed a smaller band gap energy (2.88 ev) and relatively strong light absorption than the individually dispersed SnO2 nanocrystals. Due to the narrow gap and chemical passivation aroused by inherently negative charges on the surface of chrysotile, chrysotile/SnO2 nanocomposite was endowed with superior performance to chrysotile nanotube and SnO2 nanocrystals. Abstract : In this study, a novel kind of chrysotile/SnO2 nanocomposites was fabricated via a hydrolysis precipitation method. The excitation of photogenerated electrons from the VB to the CB in SnO2 under UV irradiation induces the hole formation in the VB. The negative charges in the chrysotile support trapped photo‐generated holes at the surface and left behind unpaired electrons on the SnO2 surface, thereby separate photo‐generated electron–holes, inhibit photocarrier recombination, and thus significantly improve the photocatalytic activity.