Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 223, Issue -, Pages 35-42Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2017.05.003
Keywords
Graphitic carbon nitride; TiO2; Cu(OH)(2) cocatalyst; Heterojunction; Photocatalytic hydrogen production
Funding
- National Natural Science Foundation of China [21171147]
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Herein, a robust graphitic carbon nitride (denoted as Lg-CN) with narrow bandgap and nanobelt structure was prepared and firstly used as solid sensitizer of TiO2 prepared by in situ hydrothermal method. Simultaneously, cocatalyst Cu(OH)(2) was loaded onto Lg-CN-TiO2 surface via a facile precipitation process. The obtained three-component composite showed good stability and the H-2 evolution rate of 6 wt% Lg-CN-TiO2/1.5 wt% Cu(OH)(2) reached 37.8 mu mol h(-1) under visible light irradiation, much higher than that of pure Lg-CN or g-CN-TiO2/Cu(OH)(2) (g-CN = graphitic carbon nitride prepared by urea pyrolysis). The enhanced H-2-evolving performance was attributed to the better visible-light response of Lg-CN and the intimate contact between Lg-CN and TiO2. In addition, the mechanism of hydrogen production was tentatively proposed according to photoluminescense quenching results and electrochemical properties. We think that these valuable results would provide a guidance for the use of Lg-CN in other photocatalytic systems in the future. (C) 2017 Elsevier B.V. All rights reserved.
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