Heterostructured TiO2 spheres with tunable interiors and shells were prepared by self-template technology. This structure is composed of a hollow shell and an inner core which can enhance light scattering in the hollow space and provide a large surface to generate sufficient active sites. Besides, the nanosheets grown on the shell layer not only increased their specific surface area, but also exposed more surface-active sites. The performance of photocatalysts was estimated by the RhB decolorization, and experimental results show that the photoactivity can be greatly improved by depositing noble metal nanoparticles. It improves the efficiency of charge utilization and enhances the overall catalytic performance from the three stages of charge carrier generation, separation and surface reaction. The strong metal–support interaction (SMSI) between the noble metal nanoparticles and the oxide support has been proven to inhibit the supported precious metal, one strategy for nanoparticle aggregation and growth. On the one hand, the nanoshells isolate the precious metal nanoparticles from each other, preventing the aggregation of metal nanoparticles.

中文翻译：

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贵金属增强了具有可调内部和壳的异质结构 TiO2 球的光催化活性

异质二氧化钛2具有可调内部和外壳的球体是通过自模板技术制备的。这种结构由中空壳和内核组成，可以增强中空空间中的光散射并提供大表面以产生足够的活性位点。此外，在壳层上生长的纳米片不仅增加了比表面积，而且暴露了更多的表面活性位点。通过RhB脱色评估光催化剂的性能，实验结果表明，沉积贵金属纳米粒子可以大大提高光催化剂的光活性。它提高了电荷利用效率，从电荷载流子产生、分离和表面反应三个阶段提高了整体催化性能。贵金属纳米粒子和氧化物载体之间的强金属-载体相互作用 (SMSI) 已被证明可以抑制负载的贵金属，这是纳米粒子聚集和生长的一种策略。一方面，纳米壳将贵金属纳米粒子彼此隔离，防止金属纳米粒子聚集。