Citation: Qiang Hao, Simeng Hao, Xiuxiu Niu, Xun Li, Daimei Chen, Hao Din. Enhanced photochemical oxidation ability of carbon nitride by π-π stacking interactions with graphene[J]. Chinese Journal of Catalysis, ;2017, 38(2): 278-286. doi: 10.1016/S1872-2067(16)62561-5 shu

Enhanced photochemical oxidation ability of carbon nitride by π-π stacking interactions with graphene

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China

Received Date: 20 August 2016
Revised Date: 26 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21577132), the Fundamental Research Funds for the Central Universities (2652015225), National High Technology Research and Development Program of China (2012AA062701), Students Innovation and Entrepreneurship Training Program 2015 of China University of Geosciences (201511415069), Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes.

A one-pot method for the preparation of g-C₃N₄/reduced graphene oxide (rGO) composite photocatalysts with controllable band structures is presented. The photocatalysts are characterized by Fouirer transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, transmission electron microscope, and Mott-Schottky analysis. The valance band (VB) of g-C₃N₄ exhibits a noticeable positive shift upon hybridizing with rGO, and thus results in a strong photo-oxidation ability. The g-C₃N₄/rGO composites show a higher photodegradation activity for 2,4-dichlorophenol (2,4-DCP) and rhodamine B (RhB) under visible light irradiation (λ≥420 nm). The g-C₃N₄/rGO-1 sample exhibits the highest photocatalytic activity, which is 1.49 and 1.52 times higher than that of bulk g-C₃N₄ for 2,4-DCP and 1.52 times degradation, respectively. The enhanced photocatalytic activity for g-C₃N₄ originates from the improved visible light usage, enhanced electronic conductivity and photo-oxidation ability by the formed strong π-π stacking interactions with rGO.
- Graphitic carbon nitride,
- Graphene oxide,
- π-π stacking,
- Photocatalyst,
- Interaction
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