In-situ structuring a robust cellulose hydrogel with ZnO/SiO2 heterojunctions for efficient photocatalytic degradation. (15th November 2022)

• Record Type: Journal Article
• Authors: Ren, Jia-Xin; Zhu, Jin-Long; Shi, Shao-Cong; Yin, Mao-Qiu; Huang, Hua-Dong; Li, Zhong-Ming
• Is Part Of: Carbohydrate polymers. Volume 296(2022)
• Publication Date: 2022-11-15
• Subjects: In-situ synthesis -- Cellulose composite hydrogel -- ZnO/SiO2 heterojunctions -- Photocatalyst -- Water remediation; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.119957
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Hydrogel supported photocatalyst, an efficient strategy for water remediation suffers from compromised catalytic activity and insufficient stability. Herein, a robust cellulose-based composite hydrogel with zinc oxide (ZnO)/silica (SiO2 ) heterojunctions were fabricated by in-situ synthesis, where SiO2 not only acted as a cross-linking agent to enhance the mechanical strength and stability of hydrogel, but also promoted the photocatalytic properties of ZnO via transferring the electron-hole pairs due to its surface state. As a result, a significant improvement in the mechanical properties of cellulose-based composite hydrogel was achieved, exhibiting a high compressive strength of 703.4 kPa. Moreover, the degradation efficiency of methylene blue (MB) under light irradiation by cellulose-based composite hydrogel was 95 % in 120 min and the removal ratio maintained as high as 90 % after eight degradation cycles. This study provides a low-cost and facile method to construct new hydrogel supports with high stability and efficient photocatalytic properties. Graphical abstract: Unlabelled Image