By calcination, a sulfur vacancy rich CdS based composite photocatalyst with graphitic carbon nitride (g-C₃N₄) as a matrix has been synthesized successfully from a tetranuclear Cd–S cluster assembled supramolecular network. In this photocatalyst (CdS@g-C₃N₄), CdS nanoparticles with a size of about 5 to 8 nm disperse homogenously in the g-C₃N₄ matrix. During calcination, some coordinated nitrogen atoms dope in the lattice of CdS and replace sulfur atoms, which generates a large number of sulfur vacancies. Under visible light irradiation, CdS@g-C₃N₄ exhibits excellent H₂ production activity with a rate achieving as high as 19.88 mmol g⁻¹ h⁻¹ in the absence of a Pt cocatalyst. Its H₂ production ability remains stable for 30 h, which does not decay. Besides H₂ production, CdS@g-C₃N₄ also shows excellent photocatalytic activity for Volatile Organic Compound (VOC) degradation. For a photocatalyst, chemical content plays an important role in its performance. Here, the influence of sulfur vacancies on H₂ production and VOC degradation is discussed in detail. We expect that the sulfur vacancy rich CdS@g-C₃N₄ can act as an efficient material for H₂ production and indoor air purification.

中文翻译：

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基于gC ₃ N _4的富空位CdS基复合光催化剂，其基质来自Cd-S簇组装的超分子网络，用于H ₂生成和VOC去除†

通过煅烧，已经成功地从四核Cd-S团簇组装的超分子网络中成功合成了以氮化碳（gC ₃ N ₄）为基质的富CdS富空位CdS基复合光催化剂。在这种光催化剂（CdS @ gC ₃ N ₄）中，尺寸约为5至8 nm的CdS纳米颗粒均匀地分散在gC ₃ N ₄基质中。在煅烧过程中，一些配位的氮原子掺杂在CdS的晶格中并取代了硫原子，从而产生了大量的硫空位。在可见光照射下，CdS @ gC ₃ N ₄表现出优异的H ₂在没有Pt助催化剂的情况下，其生产活性达到19.88 mmol g ^-1 h ^-1的高速率。它的H ₂产生能力在30小时内保持稳定，并且不会衰减。除了产生H ₂以外，CdS @ gC ₃ N ₄还显示出优异的光催化活性，可降解挥发性有机化合物（VOC）。对于光催化剂，化学含量在其性能中起着重要作用。在此，详细讨论了硫空位对H ₂产生和VOC降解的影响。我们期望富含硫空位的CdS @ gC ₃ N ₄可以作为H的有效材料。₂生产和室内空气净化。