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J Colloid Interface Sci. 2017 Jul 15;498:105-111. doi: 10.1016/j.jcis.2017.03.048. Epub 2017 Mar 11.

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

Author information

1
Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, China.
2
Anshan Environmental Monitoring Central Station, Anshan 114004, China.
3
Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, China. Electronic address: songlab@lnu.edu.cn.

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.

KEYWORDS:

Graphene oxide; Photocatalysis; Quantum dot; TiO(2) microsphere

PMID:
28319838
DOI:
10.1016/j.jcis.2017.03.048

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