A nagging problem for the decompostion of photocatalyst organic carrier can be expected to be resolved by shielding effect from our yolk-porous shell nanospheres. The nanospheres were synthesized by a facile strategy: polyporrole (PPy) and silver were deposited together on TiO₂ by chemical oxidative polymerization; then PPy/Ag-coated TiO₂ nanoparticles were encapsulated in silicon dioxide (SiO₂) shell with polyethylene glycol (PEG) as a pore-forming agent via sol-gel method based on hydrolysis of tetraethyl orthosilicate (TEOS). After removing intermediary PPy between yolk and shell by calcination and washing off PEG in shell, yolk-porous shell (SiO₂@[email protected]/TiO₂) nanospheres were formed. The voids in SiO₂@[email protected]/TiO₂ can serve as photocatalytic reactors. The channels in porous shell at outer layer provide passages for light transmission, dye molecule accessing and degradants out. More importantly, the euphotic and porous shell exhibited an impressive protection to organic carrier, lest unfavorable decomposition occurred. Yolk-porous shell nanospheres showed commendable performance with >99.5% of dye removal efficiency under 3 h visible light irradiation, higher than pristine TiO₂ and Ag/TiO₂ nanoparticles, due to the synergy effect of robust adsorption capacity and photocatalysis. Our work could provide a good strategy for developing novel carrier-based photocatalysts for environmental remediation application, which can be readily extended to the combination of other nanophotocatalysts and organic carriers for enhancing sustainable photocatalytic performance.

通过我们的蛋黄-多孔壳纳米球的屏蔽作用，有望解决光催化剂有机载体分解的一个棘手问题。纳米球是通过一种简便的策略合成的：通过化学氧化聚合将多孔（PPy）和银一起沉积在TiO _2上。然后在原硅酸四乙酯（TEOS）水解的基础上，通过溶胶-凝胶法，以聚乙二醇（PEG）为成孔剂，将PPy / Ag包覆的TiO ₂纳米颗粒包裹在二氧化硅（SiO ₂）壳中。通过煅烧除去蛋黄和蛋壳之间的中间PPy并洗掉蛋壳中的PEG后，蛋黄-多孔壳（SiO ₂ @ [受电子邮件保护] / TiO ₂）形成纳米球。SiO ₂ @ [受电子邮件保护] / TiO _2中的空隙可以用作光催化反应器。外层多孔壳中的通道为透光，染料分子进入和降解出提供了通道。更重要的是，共晶和多孔的壳对有机载体表现出令人印象深刻的保护，以免发生不利的分解。卵黄壳纳米球表现出可观的性能，在3 h可见光照射下具有> 99.5％的染料去除率，高于原始的TiO ₂和Ag / TiO ₂纳米颗粒，由于强大的吸附能力和光催化的协同作用。我们的工作可以为开发用于环境修复应用的新型基于载体的光催化剂提供良好的策略，该策略可以很容易地扩展到其他纳米光催化剂和有机载体的组合，以增强可持续的光催化性能。