Designing advanced structures for semiconductor photocatalysts is an effective approach to enhance their performance. However, it is not easy to fabricate functional photocatalytic materials with complex nano-architectures. Here we have developed a sequential solution growth, sulfidation and cation-exchange strategy to fabricate CdS hierarchical multi-cavity hollow particles (HMCHPs). This strategy starts with the growth of Zn-based zeolitic imidazolate framework (ZIF-8) onto cobalt glycerate (Co-G) solid spheres. Sulfidation of the obtained Co-G@ZIF-8 composite particles leads to the formation of CoS_x@ZnS HMCHPs, which are converted into CdS HMCHPs via a cation-exchange reaction. Owing to the favourable properties of the well-defined hierarchical hollow structure, the CdS HMCHPs exhibit enhanced activity for photocatalytic CO₂ reduction compared with other CdS photocatalysts with solid and common hollow structures. The performance of CdS HMCHPs can be further promoted by loading of Au to reach a CO generation rate of 3758 μmol h⁻¹ g⁻¹ under visible light irradiation.

中文翻译：

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制备CdS分层多腔空心颗粒以有效减少可见光CO ₂ †

设计用于半导体光催化剂的先进结构是提高其性能的有效方法。然而，制造具有复杂纳米结构的功能性光催化材料并不容易。在这里，我们开发了一种顺序溶液生长，硫化和阳离子交换策略，以制造CdS分级多腔空心颗粒（HMCHPs）。该策略始于将锌基沸石咪唑酸盐骨架（ZIF-8）生长到甘油酸钴（Co-G）固体小球上。所获得的Co-G @ ZIF-8复合颗粒的硫化导致形成CoS _x @ZnS HMCHPs，并通过Cos _x @ZnS HMCHPs转化为CdS HMCHPs 。阳离子交换反应。由于界限分明的中空结构的良好特性，与其他具有固体和常见中空结构的CdS光催化剂相比，CdS HMCHPs具有增强的光催化CO ₂还原活性。CdS HMCHPs的性能可以通过在可见光照射下加载Au达到3758μmolh ^-1 g ^-1的CO生成速率来进一步提高。