Floatable Fe-TiO2/hydrogel composite for photodegradation of water pollutants

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Science China Materials Pub Date : 2024-10-28 DOI:10.1007/s40843-024-3150-2

Ying-Ying Jiao (, ), Zhi-Yong Cheng (, ), Hao Luo (, ), Qiu-Ping Zhao (, ), Xue-Yan Xiang (, ), Zhi-Ming Zhang (, )

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Abstract

The development of highly efficient and low-cost photocatalysts for degradation of organic pollutants become an effective approach for environmental remediation. However, the practical application of traditional powder catalyst in photocatalytic technology is limited due to its low recycling capacity, agglomeration and secondary pollution risk. Herein, a floating Fe-doped TiO₂ and hydrogel (FTH) composite was synthesized for the photodegradation of Rhodamine B via a facile impregnation method. The photodegradation results show that the FTH composite exhibits a higher photocatalytic efficiency with degradation percentage (95.6%) compared with pure TiO₂ (41.2%). The enhanced photocatalytic performance is attributed to its excellent flotation performance, providing a large number of active sites for pollutant degradation, contact with O₂ and photons at the air/water interface. Remarkably, the adsorbed Rhodamine B in FTH can still be removed by exposing to light in the air alone, demonstrating strong recovery ability of the FIH composite catalyst. The floatable hydrogel nanocomposites offer a promising solution for scalable solar-drive degradation of water pollutants, paving the way for sustainable water treatment technologies.

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用于光降解水污染物的可浮 Fe-TiO2/ 水凝胶复合材料

开发高效、低成本的光催化剂来降解有机污染物已成为一种有效的环境修复方法。然而，由于传统粉末催化剂的回收能力低、团聚和二次污染风险等问题，其在光催化技术中的实际应用受到了限制。本文通过简便的浸渍法合成了一种漂浮的掺铁 TiO2 和水凝胶（FTH）复合材料，用于罗丹明 B 的光降解。光降解结果表明，与纯 TiO2（41.2%）相比，FTH 复合材料具有更高的光催化效率和降解率（95.6%）。光催化性能的提高归功于其出色的浮选性能，为污染物降解提供了大量的活性位点，并在空气/水界面与氧气和光子接触。值得注意的是，FTH 中吸附的罗丹明 B 仍然可以仅通过在空气中暴露于光而被去除，这表明 FIH 复合催化剂具有很强的回收能力。可浮水凝胶纳米复合材料为可扩展的太阳能驱动水污染物降解提供了一种前景广阔的解决方案，为可持续水处理技术铺平了道路。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.