Abstract Stimuli-responsive materials with the controllable oil-water separation and water further purification abilities show great potential in practical applications. In this paper, a highly effective and eco-friendly smart pH-responsive melamine sponge with switchable wettability and photocatalytic activity was prepared via anchoring three-dimensional cell-like BiOCl microspheres into sponge skeletons and being modified by dodecanedioic acid and lauric acid. The obtained sponge shows rapidly switchable wettability and can separate various oil/water mixtures with high efficiency up to 99%. Moreover, the as-prepared smart sponge also demonstrates reliable photocatalytic ability and could remove the soluble pollutants (such as methylene blue and Sudan III) under visible light as well as UV light (degradation efficiency around 100%). Besides, the smart pH-responsive material showed satisfactory reusability and stability. This smart multifunctional material has outstanding potential in water resource purification.

中文翻译：

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具有可切换润湿性和光催化响应的智能海绵用于可控油水分离和污染物去除

摘要 具有可控油水分离和水进一步净化能力的刺激响应材料在实际应用中显示出巨大的潜力。本文通过将三维细胞状BiOCl微球锚定在海绵骨架中，并通过十二烷二酸和月桂酸改性，制备了一种高效、环保、具有可切换润湿性和光催化活性的智能pH响应三聚氰胺海绵。所得海绵显示出可快速切换的润湿性，可以以高达 99% 的效率分离各种油/水混合物。此外，所制备的智能海绵还表现出可靠的光催化能力，可以在可见光和紫外线下去除可溶性污染物（如亚甲基蓝和苏丹 III）（降解效率在 100% 左右）。除了，智能 pH 响应材料显示出令人满意的可重复使用性和稳定性。这种智能多功能材料在水资源净化方面具有突出的潜力。