Yolk-shell nanostructures have recently attracted tremendous research interests in various areas because of their unique structural merits. Currently, there is an urgent need for developing porous shells with multifunctional features to enhance their performance in various applications. Herein, advanced yolk-shell nanospheres have been facilely prepared by encapsulating silver nanoparticles with porous Janus polymer shells that consist of a hypercrosslinked polystyrene (xPS) outer layer and a tethered poly(acrylic acid) (PAA) brush lining. The xPS outer layer possesses well-developed porosity as mass diffusion pathways. More importantly, the tethered PAA brushes with customized carboxyl groups exhibit great affinity toward specific species (e.g., cationic dyes), leading to their enrichment from the bulk solution into the interior cavity. The unusual combination of highly porous outer layers with customizable inbuilt polymer linings in the porous Janus shells endows them with great promise for synergistically catalytic degradation of cationic dyes.

卵黄壳纳米结构由于其独特的结构优点，最近在各个领域引起了巨大的研究兴趣。当前，迫切需要开发具有多功能特征的多孔壳以增强其在各种应用中的性能。在此，已经通过用多孔的Janus聚合物壳封装银纳米颗粒来方便地制备高级的蛋黄壳纳米球，该多孔的Janus聚合物壳由超交联的聚苯乙烯（xPS）外层和束缚的聚丙烯酸（PAA）刷衬组成。xPS外层具有发达的孔隙度作为质量扩散途径。更重要的是，具有定制羧基的束缚PAA刷对特定物种（例如，阳离子染料）表现出极大的亲和力，从而使其从本体溶液中富集到内部空腔中。