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Biopolymer-supported TiO2 as a sustainable photocatalyst for wastewater treatment: a review

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Abstract

The rising water pollution by pesticides, pharmaceuticals and dyes is a major health issue calling for advanced remediation methods such as photocatalysis with titanium dioxide (TiO2), yet the use of TiO2 displays issues of aggregation, mass loss, recovery, and reusability. These issues have been recently solved by synthesizing biopolymer-supported photocatalysts using cheap, biodegradable and safe biopolymers such as chitosan, alginate, cellulose, cyclodextrin, guar gum and starch. Here we review biopolymer-supported TiO2 photocatalysts for the removal of organic compounds, with focus on preparation methods, photo and chemical stability, reusability, and adsorptive capacity. We discuss applications of immobilized photocatalysts at the industrial scale.

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This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

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Correspondence to Mahendra Chinthala or Dai-Viet N. Vo.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Balakrishnan, A., Appunni, S., Chinthala, M. et al. Biopolymer-supported TiO2 as a sustainable photocatalyst for wastewater treatment: a review. Environ Chem Lett 20, 3071–3098 (2022). https://doi.org/10.1007/s10311-022-01443-8

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  • DOI: https://doi.org/10.1007/s10311-022-01443-8

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