Citation: 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. doi: S1872-2067(19)63300-0 shu

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

College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China

Received Date: 10 December 2018
Revised Date: 9 January 2019

Fund Project: This work was supported by the Specialized Innovation of Social and People's Livelihood in Chongqing (cstc2016shmszx20012), Converting Outstanding Achievements of University-Funded Projects of Chongqing (KJZH17122), the National Natural Science Foundation of China (5160080705), the Key Laboratory Open Project from Chongqing Technology and Business University (1556036), the Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ130704), and Innovative Research Project from Chongqing Technology and Business University (yjscxx2016-060-34)

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.
- g-C₃N₄,
- Electronic structure,
- Visible light photocatalysis,
- Tetracycline hydrochloride degradation,
- Environmental remediation
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