Lin Jinliang, Sun Xiaoxiang, Qin Biao, Yu Ting
Department of Chemical and Engineering, Zunyi Normal College 563000 Zunyi P. R. China
Department of Chemical and Engineering, Qiannan Normal University for Nationalities 558000 DuYun P. R. China.
RSC Adv. 2018 Jun 5;8(37):20543-20548. doi: 10.1039/c8ra03211d.
A chemical system with enhanced efficiency for electron generation and transfer was constructed by the integration of TiO hollow spheres with [Co(bipy)]. The introduction of [Co(bipy)] remarkably enhances the photocatalytic activity of pristine semiconductor photocatalysts for heterogeneous CO conversion, which is attributable to the acceleration of charge separation. Of particular interest is that the excellent photocatalytic activity of the heterogeneous catalysts can be utilised for a universal photocatalytic CO reduction system. Yields of 16.8 μmol CO and 6.6 μmol H can be obtained after 2 h of the photoredox reaction, and the apparent overall quantum yield was estimated to be 0.66% under irradiation at = 365 nm. The present findings clearly demonstrate that the integration of electron mediators with semiconductors is a feasible process for the design and development of efficient photochemical systems for CO conversion.
通过将TiO空心球与[Co(bipy)]相结合，构建了一个电子产生和转移效率更高的化学体系。[Co(bipy)]的引入显著提高了原始半导体光催化剂用于多相CO转化的光催化活性，这归因于电荷分离的加速。特别值得注意的是，多相催化剂的优异光催化活性可用于通用的光催化CO还原体系。光氧化还原反应2小时后，可获得16.8 μmol CO和6.6 μmol H的产率，在365 nm光照下，表观总量子产率估计为0.66%。目前的研究结果清楚地表明，电子介质与半导体的结合是设计和开发用于CO转化的高效光化学体系的可行过程。
