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Biopolymer-supported TiO2 as a sustainable photocatalyst for wastewater treatment: a review |
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| Authors: | Balakrishnan Akash Appunni Sowmya Chinthala Mahendra Vo Dai-Viet N |
| Institution: | 1.Process Intensification Laboratory, Department of Chemical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India ;2.Department of Chemical Engineering, KPR Institute of Engineering and Technology, Coimbatore, Tamil Nadu, 641047, India ;3.Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam ; |
| 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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