Surface Defect Engineering in 2D Nanomaterials for Photocatalysis

Advanced Functional Materials - Tập 28 Số 39 - 2018
Jun Xiong1,2, Jun Di1,3, Jiexiang Xia1, Wenshuai Zhu1, Huaming Li1
1School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, P. R. China
2School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
3School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore

Tóm tắt

Abstract2D Nanomaterials, with unique structural and electronic features, have shown enormous potential toward photocatalysis fields. However, the photocatalytic behavior of pristine 2D photocatalysts are still unsatisfactory, and far below the requirements of practical applications. In this regard, surface defect engineering can serve as an effective means to tune photoelectric parameters of 2D photocatalysts through tailoring the local surface microstructure, electronic structure, and carrier concentration. In this review, recent progress in the design of surface defects with the classified anion vacancy, cation vacancy, vacancy associates, pits, distortions, and disorder on 2D photocatalysts to boost the photocatalytic performance is summarized. The strategies for controlling defects formation and technique to distinguish various surface defects are presented. The crucial roles of surface defects for photocatalysis performance optimization are proposed and advancement of defective 2D photocatalysts toward versatile applications such as water oxidation, hydrogen production, CO2 reduction, nitrogen fixation, organic synthesis, and pollutants removal are discussed. Surface defect modulated 2D photocatalysts thus represent a powerful configuration for further development toward photocatalysis.

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