目的 构筑净化性能优异的纳米TiO2/活性炭复合表面。方法 采用溶凝胶模板法构筑球形表面，将乳化法制备的石蜡球和复合活性炭的纳米TiO2溶胶挤压成形，温和处理后形成规则稳定的球形表面。使用SEM、XRD和FTIR进行表面微观结构、形貌和物相检测，采用X射线断层扫描对球形表面结构进行重构和球面特征分析。分析测定了不同当量直径球形表面的样品对亚甲基蓝的净化效果。结果 温和处理工艺维持了原始P25粉末的晶型和晶粒尺寸，溶凝胶模板法可以形成贯通、多面、多孔径的结构和簇状均匀表面。3DCT结果显示，活性炭的复合使样品形成了碳增强的TiO2球形表面。构筑成功的纳米TiO2复合活性炭样品，在8个周期的循环吸附-净化中可以完全将亚甲基蓝净化降解。平均当量直径为0.67 mm的样品，在9个周期的净化反应中，净化率可以保持100%。结论 溶凝胶模板法成功构筑了纳米TiO2复合活性炭的球形连续表面，球形表面之间大的孔道连接和活性炭在纳米TiO2颗粒之间的复合，可以提高传质效率，从而提高循环净化性能。

The work aims to construct a nano-TiO2/activated carbon composite surface with excellent purification performance. The sol-gel template method was used to construct the spherical surface. The paraffin ball was prepared by emulsification method and extruded with the nano-TiO2/activated to form a regular stable spherical surface. The surface microstructure, morphology and phase were detected by SEM, XRD and FTIR. The spherical surface structure was reconstructed and analyzed by spherical X-ray tomography. The purification effect of the samples with different equivalent diameters spherical surfaces on methylene blue was analyzed. The mild treatment process maintained the phase and grain size of the original P25 powder, and interconnected, multi-faceted and multi-pore structure and cluster-like uniform surface could be formed by sol-gel template method. The 3DCT results showed that the composite of activated carbon allowed the sample to form carbon-reinforced TiO2 spherical surfaces of different sizes. The successfully constructed nano-TiO2/activated carbon composite surface could completely degrade methylene blue after 8 cycles of adsorption-catalysis test. The purification of the sample with an average equivalent diameter of 0.67 mm maintained at 100% after a 9-cycle purification reaction. Therefore, the sol-gel template method can construct the of nano-TiO2/activated carbon composite spherical continuous surface. The large pore connection between the spherical surfaces and the composite of activated carbon can promote the mass transfer efficiency and improve the cycle purification performance.