The goal of this work was to assess the performance of Pt nanoparticles (NPs) as co-catalysts on the photocatalytic activity of TiO₂@[email protected]₃N₄ hollow spheres, which was tested by photodegrading rhodamine B and methyl blue under visible light irradiation. TiO₂@[email protected]₃N₄ composites were fabricated by using modified polystyrene balls as templates, hydrothermal reactions, and calcination. Under simulated sunlight irradiation, photocatalytic activity was in the following of TiO₂@[email protected]₃N₄ > TiO₂@C₃N₄ > C₃N₄ > P25. The photo-conversion rate of the TiO₂@[email protected]₃N₄ increased significantly relative to TiO₂@C₃N₄ and the others. The combination of TiO₂ and C₃N₄, as well as the sandwiched of Pt NPs reduce electron-hole recombination as a result of having an electron trap site, which can store and shuttle photo-generated electrons, and enhance photo-generation of active radicals. Electron paramagnetic resonance (EPR) spectroscopy, as well as photo-luminescence (PL), and electrochemical measurements were taken to verify this conclusion. Considering the multi-functional combination of precious metals and semiconductor materials, this work may provide new ideas for the design of high-performance catalysts.

这项工作的目的是评估Pt纳米颗粒（NPs）作为助催化剂对TiO ₂ @ [受电子邮件保护的] ₃ N ₄空心球的光催化活性的性能，该测试通过在可见光下光降解罗丹明B和甲基蓝进行了测试。光照射。以改性聚苯乙烯球为模板，水热反应和煅烧制备了TiO ₂ @ [ e -mail protected] ₃ N ₄复合材料。在模拟阳光照射下，TiO ₂ @ [受电子邮件保护] ₃ N ₄  > TiO ₂ @C ₃ N _4的光催化活性依次为 > C ₃ N ₄  > P25。相对于TiO ₂ @C ₃ N ₄及其它，TiO ₂ @ [受电子邮件保护的] ₃ N ₄的光转化率显着提高。TiO ₂和C ₃ N _4的组合Pt NPs和Pt NPs的夹心结构具有电子陷阱位点，可减少电子-空穴的重组，该位点可存储和穿梭光生电子，并增强活性自由基的光生。电子顺磁共振（EPR）光谱以及光致发光（PL）和电化学测量结果均得到验证。考虑到贵金属和半导体材料的多功能结合，这项工作可能为高性能催化剂的设计提供新的思路。