Nanoscale water spray assisted synthesis of CAs@B-TiO2 core–shell nanospheres with enhanced visible-light photocatalytic activity. (20th April 2021)

• Record Type: Journal Article
• Authors: Wan, Hengcheng; Zhang, Ling; Li, Yi; Meng, Qi; Zhang, Youkui; Duan, Tao
• Is Part Of: Nanotechnology. Volume 32:Number 28(2021)
• Publication Date: 2021-04-20
• Subjects: carbon aeroges -- black-TiO2 -- photocatalytic -- oxygen vacancy -- nanoscale water spray; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/abbf69
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Increasing photoactive areas and oxygen vacancy to improve the separation and utilization of electrons and holes in a photocatalytic process are a guarantee for highly photocatalysis efficiency. In this work, we report a CAs@B-TiO2 core–shell nanospheres via a nanoscale water spray assisted method to deposit of black titanium dioxide (B-TiO2 ) on carbon aerogel sphere (CAs) though slowly hydrolyzing of butyl titanate (e.g. TBOT) in an ethanol-water system. On this basis, furthermore, a facile one-step N2 H4 · H2 O treatment was used to introduces oxygen vacancies on the surface of TiO2 coating layer forming black TiO2 . Oxygen vacancies can extend the optical response range of the TiO2 shell from the ultraviolet to the visible region, and increase conductivity and charge transport on the interface of core–shell structure. This study reveals the importance of surface oxygen vacancies for reducing band gaps and developing highly active photocatalysts under visible light.