Efficiency and stability are the two key points for CdS photocatalyst because its application has been seriously restricted owing to serious photocorrosion issue and the recombination of photo-induced charge pairs. In this paper, CdS nanoparticles (NPs) were surface-modified by chemical inert Al₂O₃ shell. This modification could prevent nascent formed oxygen induced photo-corrosion and enhance the photo-stability of CdS during water splitting significantly. In addition, it was found that such a shell could enhance efficient separation of photo-induced charge pairs. Besides, with the assistance of artificial gill of removing nascent formed O₂ from water, Pt/[email protected]₂O₃ photocatalyst can achieve overall water splitting under visible light irradiation. The rate of H₂ evolution increased 126 times over Pt/[email protected]₂O₃ composite compared with pure CdS NPs, and the stability was maintained in several cycles of reaction without any decrease. The measurement of concentration of Cd²⁺ in solution after long cycles by ICP method confirmed this anti-photo-corrosion property of Al₂O₃ shell on CdS. This work provides a new potential way to design and fabricate more stable and efficient CdS-based nanocomposite photocatalysts for versatile solar energy conversion.

效率和稳定性是CdS光催化剂的两个关键点，因为严重的光腐蚀问题和光诱导电荷对的重组严重限制了其应用。本文通过化学惰性的Al ₂ O ₃壳对CdS纳米颗粒（NPs）进行了表面改性。这种修饰可以防止新生的氧气诱导的光腐蚀，并显着提高水分解过程中CdS的光稳定性。另外，发现这种壳可以增强光诱导电荷对的有效分离。此外，借助人工g从水中去除新生的O ₂，Pt / [受电子邮件保护] ₂ O ₃光催化剂可以在可见光照射下实现整体水分解。与纯CdS NPs相比，Pt / [受电子邮件保护的] ₂ O ₃复合物的H ₂析出速率提高了126倍，并且在多个反应循环中均保持了稳定性，而没有任何降低。通过ICP法对长循环后的溶液中的Cd ²⁺浓度进行测定，确认了Al ₂ O ₃壳对CdS的耐光蚀性。这项工作为设计和制造更稳定和有效的基于CdS的纳米复合光催化剂提供了一种新的潜在途径，从而可以实现多种太阳能转化。