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Graphene oxide quantum dot-sensitized porous titanium dioxide microsphere: Visible-light-driven photocatalyst based on energy band engineering

Author:
Zhang, Yu, Qi, Fuyuan, Li, Ying, Zhou, Xin, Sun, Hongfeng, Zhang, Wei, Liu, Daliang, Song, Xi-Ming
Source:
Journal of colloid and interface science 2017 v.498 pp. 105-111
ISSN:
0021-9797
Subject:
electric current, electrons, energy, equations, graphene oxide, microparticles, nanocomposites, photocatalysis, photocatalysts, quantum dots, semiconductors, titanium dioxide
Abstract:
We report a novel graphene oxide quantum dot (GOQD)-sensitized porous TiO2 microsphere for efficient photoelectric conversion. Electro-chemical analysis along with the Mott-Schottky equation reveals conductivity type and energy band structure of the two semiconductors. Based on their energy band structures, visible light-induced electrons can transfer from the p-type GOQD to the n-type TiO2. Enhanced photocurrent and photocatalytic activity in visible light further confirm the enhanced separation of electrons and holes in the nanocomposite.
Agid:
6093944