Removal of antibiotics detected in wastewater or natural aquatic systems by regular municipal treatment is challenging. Photocatalysis is considered to be the most well-known and green strategy for such removal. However, the catalytic efficiency is restricted by UV radiation dependence, fast electron-hole recombination, and low porosity/surface area of the photocatalyst. In this study, we have developed a highly porous anatase TiO₂-polymethylsilsesquioxane (PMSQ) aerogel with nonmetal carbon dopant, which can simultaneously enhance the adsorption ability and visible light photo-activity. And tetracycline hydrochloride (TCH) was selected as a model antibiotic. A high surface area (747 g cm⁻³) C-TiO₂-PMSQ aerogel can remove 91% TCH within 180 min under visible light. But the removal needs to be in an isopropyl alcohol/water co-solvent, due to the intrinsic hydrophobicity of PMSQ. After a heat treatment under 400°C, the surface area of C-TiO₂-PMSQ aerogel decreases to 618 g cm⁻³, and the sample loses its hydrophobicity, the removal of TCH can be in aqueous condition and the efficiency increases to 98%. Moreover, both catalysts can be recycled 7 times and still maintain high removal efficiency (85 and 64% remained for hydrophobic and hydrophilic gels, respectively).

通过常规市政处理去除废水或天然水生系统中检测到的抗生素具有挑战性。光催化被认为是最广为人知的绿色去除策略。然而，催化效率受到紫外线辐射依赖性、快速电子-空穴复合和光催化剂的低孔隙率/表面积的限制。在这项研究中，我们开发了一种具有非金属碳掺杂剂的高度多孔锐钛矿 TiO ₂ -聚甲基倍半硅氧烷 (PMSQ) 气凝胶，它可以同时增强吸附能力和可见光光活性。并选择盐酸四环素（TCH）作为模型抗生素。高表面积 (747 g cm ^-3 ) C-TiO ₂-PMSQ 气凝胶在可见光下可在 180 分钟内去除 91% TCH。但由于 PMSQ 固有的疏水性，需要在异丙醇/水共溶剂中进行去除。在400°C下热处理后，C-TiO ₂ -PMSQ 气凝胶的表面积降低到618 g cm ^-3，样品失去疏水性，可以在水性条件下去除TCH，效率提高到98 %。此外，两种催化剂都可以循环使用 7 次，仍然保持高去除效率（疏水凝胶和亲水凝胶分别保留 85% 和 64%）。