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

doi:10.1016/S1872-2067(16)62561-5

Abstract

Abstract:

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.

Key words: Graphitic carbon nitride, Graphene oxide, π-&pi, stacking, Photocatalyst, Interaction

Qiang Hao, Simeng Hao, Xiuxiu Niu, Xun Li, Daimei Chen, Hao Ding. Enhanced photochemical oxidation ability of carbon nitride by π-π stacking interactions with graphene[J]. Chinese Journal of Catalysis, 2017, 38(2): 278-286.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(16)62561-5

https://www.cjcatal.com/EN/Y2017/V38/I2/278

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