Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic environment

Highlights

•Wood and its reassemblies are ideal substrates to develop novel photocatalysts.

•Synthetic methods and mechanisms of wood-derived photocatalysts are summarized.

•Advances in wood-derived photocatalysts for organic pollutant removal are summed up.

•Metal doping, morphology control and semiconductor coupling methods are highlighted.

•Structure-activity relationship and catalytic mechanism of photocatalysts are given.

Abstract

Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years, because of the high abundance and renewability of wood as well as the high reaction activity and unique structural features of these materials. Herein, we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic pollutants. This review begins with a brief introduction of the development of photocatalysts and hierarchical structure of wood. The review then focuses on strategies of designing novel photocatalysts based on wood or its recombinants (such as 1D fiber, 2D films and 3D porous gels) using advanced nanotechnology including sol-gel method, hydrothermal method, magnetron sputtering method, dipping method and so on. Next, we highlight typical approaches that improve the photocatalytic property, including metal element doping, morphology control and semiconductor coupling. Also, the structure-activity relationship of photocatalysts is emphasized. Finally, a brief summary and prospect of wood-derived photocatalysts is provided.

Graphical abstract

Keywords

Wood / Nanocatalysts / Photodegradation / Organic contaminants / Composites

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant Nos. 31901249 and 31890771), the Young Elite Scientists Sponsorship Program by CAST (Grant No. 2019QNRC001), the Scientific Research Foundation of Hunan Provincial Education Department (Grant No. 18B180), the China Postdoctoral Science Foundation (Grant No. 2020M672846) and the Outstanding Chinese and Foreign Youth Exchange Program of China Association of Science and Technology.

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