Photocatalytic technology is an attractive option for environmental remediation because of its green and sustainable nature. However, the inefficient utilization of solar energy and powder morphology currently impede its practical application. Here, we designed a floatable photocatalyst by anchoring 0D Cu₂(OH)PO₄ (CHP) nanoparticles on 2D graphene to construct 0D/2D CHP/reduced graphene oxide (rGO) aerogels. The CHP/rGO aerogels have interconnected mesopores that provide a large surface area, promoting particle dispersion and increasing the number of active sites. Moreover, the optical response of the CHP/rGO aerogel has been significantly expanded to cover the full spectrum of the solar light. Notably, the 20%CHP/rGO aerogel displayed a high degradation rate (k = 0.178 min^–1) taking methylene blue (MB) as a model pollutant under light irradiation (λ > 420 nm). The enhanced photocatalytic activity is ascribed to the rapid electron transfer in the CHP/rGO heterostructures, as supported by the DFT theoretical calculations. Our research highlights the utilization of full spectrum responsive photocatalysts for the elimination of organic pollutants from wastewater under solar light irradiation, as well as the potential for catalyst recovery using floatable aerogels to meet industrial requirements.

中文翻译：

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用于全光谱驱动光催化降解有机污染物的可漂浮 Cu2(OH)PO4/rGO 气凝胶


光催化技术因其绿色和可持续的性质而成为环境修复的一个有吸引力的选择。然而，太阳能利用效率低和粉末形貌目前阻碍了其实际应用。在这里，我们设计了一种可漂浮的光催化剂，通过将 0D Cu ₂ (OH)PO ₄ (CHP) 纳米粒子锚定在 2D 石墨烯上，构建 0D/2D CHP/还原氧化石墨烯 (rGO) 气凝胶。 CHP/rGO 气凝胶具有互连的中孔，可提供较大的表面积，促进颗粒分散并增加活性位点的数量。此外，CHP/rGO 气凝胶的光学响应已显着扩展，可覆盖太阳光的全光谱。值得注意的是，以亚甲蓝（MB）为模型污染物，20%CHP/rGO气凝胶在光照射（λ > 420 nm）下表现出较高的降解率（k = 0.178 min ^–1 ）。 DFT 理论计算支持光催化活性的增强归因于 CHP/rGO 异质结构中的快速电子转移。我们的研究强调了利用全光谱响应光催化剂在太阳光照射下消除废水中的有机污染物，以及使用可漂浮气凝胶回收催化剂以满足工业要求的潜力。