Fenton photocatalytic sponges for rapid separation of emulsified-oil/dyes†

RSC Applied Polymers Pub Date : 2025-05-09 DOI:10.1039/D5LP00070J

Hongliang Zhang and Zhiguang Guo

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Abstract

It is challenging to effectively and swiftly address oil and dye pollution. Herein, AM/MAA/HNTs/β-FeOOH sponges with high adsorption performance and strong photocatalytic resistance to oil/dye pollution is reported. β-FeOOH loading increases the specific surface area of the whole material in HNTs, which improves the adsorption of dyes. Composites of HNTs/β-FeOOH of appropriate ratio can realize the adsorption of dyes (C ≤ 20 mg L⁻¹) in 3 min. In addition, due to the photocatalytic properties of β-FeOOH, HNTs/β-FeOOH can also realize the photocatalytic degradation of methylene blue (C = 30 mg L⁻¹) in 30 min. The underwater superoleophobic properties of the AM/MAA/HNTs/β-FeOOH sponge is attributed to improvements of roughness and hydrophilicity. The modified sponge with its special wettability and good adsorption photocatalytic performance enables it to rapidly separate emulsion/dyes (C < 10 mg L⁻¹). This study provides an alternative and effective solution for the problem of oil/dye contamination in complicated wastewater.

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Fenton光催化海绵快速分离乳化油/染料†

有效、快速地解决石油和染料污染问题是一项挑战。本文报道了AM/MAA/HNTs/β-FeOOH海绵具有较高的吸附性能和较强的抗油/染料污染光催化性能。β-FeOOH的负载增加了HNTs中整个材料的比表面积，从而提高了对染料的吸附。适当比例的HNTs/β-FeOOH复合材料可以在3 min内实现对染料（C≤20 mg L−1）的吸附。此外，由于β-FeOOH的光催化性能，HNTs/β-FeOOH还可以在30 min内实现对亚甲基蓝（C = 30 mg L−1）的光催化降解。AM/MAA/HNTs/β-FeOOH海绵的水下超疏油性能归因于粗糙度和亲水性的改善。改性海绵具有特殊的润湿性和良好的吸附光催化性能，可快速分离乳剂/染料(C <；10mg L−1)。本研究为复杂废水中油染料污染问题提供了一种替代的、有效的解决方案。

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RSC Applied Polymers

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