Unique electronic structure of Mg/O co-decorated amorphous carbon nitride enhances the photocatalytic tetracycline hydrochloride degradation

doi:10.1016/S1872-2067(19)63300-0

Abstract

Abstract:

g-C₃N₄ is a hot visible light photocatalyst. However, the fast recombination of photogenerated electron-hole pairs leads to unsatisfactory photocatalytic efficiencies. In this study, Mg/O co-decorated amorphous carbon nitride (labeled as MgO-CN) with a unique electronic structure was designed and prepared via a combined experimental and theoretical approach. The results showed that the MgO-CN exhibited an increased light absorption ability and promoted charge separation efficiency. The Mg and O co-decoration created a unique structure that could generate localized electrons around O atoms and enhance the reactant activation capacities via the C→O←Mg route. This could dramatically promote the O₂ molecule activation on the catalyst surface to generate reactive species (·O₂^-/·OH). The optimized MgO-CN exhibited a high photocatalytic activity for the degradation of tetracycline hydrochloride in water, which was five times higher than that of pristine g-C₃N₄. The present work could provide a new strategy for modifying the electronic structure of g-C₃N₄ and enhancing its performance for environmental applications.

Key words: g-C₃N₄, Electronic structure, Visible light photocatalysis, Tetracycline hydrochloride degradation, Environmental remediation

Xiaolu Wu, Min Fu, Peng Lu, Qiuyan Ren, Cheng Wang. Unique electronic structure of Mg/O co-decorated amorphous carbon nitride enhances the photocatalytic tetracycline hydrochloride degradation[J]. Chinese Journal of Catalysis, 2019, 40(5): 776-785.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(19)63300-0

https://www.cjcatal.com/EN/Y2019/V40/I5/776

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