TiO2/Cu2O/Pt复合空心微球的制备及其光催化性能

以锐钛矿相TiO₂溶胶为基底，采用沉淀法和液相沉积法制备了TiO₂/Cu₂O/Pt复合空心微球，通过改变n₍Ti⁴⁺)∶n_Cu2+和H₂Pt Cl₆·6H₂O溶液的加入量对TiO₂的形貌和结构进行调控，采用不同的方法对不同样品的物相及结构、微观形貌和光学性能进行了对比分析。分析结果表明，复合材料中Pt与Cu₂O的引入产生协同效应，不仅在一定程度上阻止了电子-空穴的复合，还降低了禁带宽度，在可见光区域光吸收明显增强。与TiO₂、Cu₂O和TiO₂/Cu₂O光催化剂相比较，TiO₂/Cu₂O/Pt降解有机污染物的能力显著增强，首次光照120 min可降解93%的甲基橙(MO)溶液，4次循环后降解率为71%，具有良好的光催化...

Preparation and photocatalytic properties of TiO2/Cu2O/Pt composite hollow microspheres

In this study, TiO₂/Cu₂O/Pt composite hollow microspheres were prepared by precipitation and liquid deposition methods based on anatase TiO₂ sol. The morphology and structure of different samples were controlled by different methods, the phase and structure, microscopic morphology, and optical properties of different samples were compared and analyzed. The results show that the introduction of Pt and Cu₂O in the composites produces a syner-gistic effect, which effectively suppresses the electron-hole complexation, reduces the forbidden band width, and sig-nificantly enhances the light absorption in the visible region. Compared with TiO₂, Cu₂O and TiO₂/Cu₂O photocata-lysts, the TiO₂/Cu₂O/Pt photocatalyst had a significantly enhanced ability to degrade organic pollutants, can degrade 93% of methyl orange (MO) solution by 120 min of light, the degradation rate was 71% after four cycles, with excel-lent photocatalytic stability.