Issue 39, 2024

An attachable, self-healing and durable TiO2/rGO/PVA photocatalytic hydrogel band for dye degradation

Abstract

This work presents the fabrication of a photocatalytic hydrogel band through facile one-pot processes of mixing with TiO2 nanotubes (TiNT)/graphene oxide sheets (GO)/polyvinyl alcohol (PVA), in situ photoreduction of GO and freeze–thaw gelation. The interactions between TiNT/rGO/PVA make the constructed porous gel network possess good mechanical strength with flexibility and self-healing capability. The gelation matrix also allows the TiNT/rGO/PVA hydrogel band to easily adhere to various smooth surfaces. The structural and optical analysis of the TiNT/rGO/PVA hydrogel bands indicated that the binding of rGO on TiNT can boost the photocatalytic activity by accelerating charge separation and inhibiting charge recombination of TiO2. Due to the combined effects of enhanced activity, porous features to facilitate molecular diffusion, and improved mechanical strength, the TiNT/rGO/PVA hydrogel bands exhibited excellent photocatalytic performance for the decomposition of dyes with well-maintained activity without a loss after repeated usages. These results showed the potential of hydrogel-based photocatalytic systems for more convenient and reliable usages in environmental remediation.

Graphical abstract: An attachable, self-healing and durable TiO2/rGO/PVA photocatalytic hydrogel band for dye degradation

Supplementary files

Article information

Article type
Paper
Submitted
24 জুন 2024
Accepted
24 আগ. 2024
First published
28 আগ. 2024

J. Mater. Chem. C, 2024,12, 15946-15954

An attachable, self-healing and durable TiO2/rGO/PVA photocatalytic hydrogel band for dye degradation

F. Meng, W. Wang, Y. Zeng, Z. Gao, J. Li, H. Jia and Q. Ji, J. Mater. Chem. C, 2024, 12, 15946 DOI: 10.1039/D4TC02634A

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