Binary semiconductor quantum dots such as CdS and CdSe have been widely studied as photocatalysts for hydrogen production, but the high toxicity of Cd impedes their widespread deployment. Recently, multinary I–III–VI-based semiconductors, e.g., AgInS₂ and CuInS₂, have emerged as promising alternatives for environmentally benign photocatalysts. In this work, we prepared quantum dots (QDs) composed of an alloyed ZnSe–AgInSe₂ (ZAISe) semiconductor and evaluated their photocatalytic activity for hydrogen (H₂) production. By individually controlling the fractions of Zn and Ag, that is, the ratios of (Ag + In)/(Zn + Ag + In) and Ag/(Ag + In), the band structure of ZAISe QDs could be finely tuned to improve their photocatalytic activity. The action spectra of the photocatalytic reaction of ZAISe QDs revealed vigorous activity across the whole visible region from 400 to 700 nm. The highest apparent quantum yield of H₂ production reached 3.4% under irradiation at 600 nm.

中文翻译：

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控制可见光驱动的合金化ZnSe–AgInSe2量子点的光催化产氢

诸如CdS和CdSe之类的二元半导体量子点已被广泛用作制氢的光催化剂，但Cd的高毒性阻碍了它们的广泛应用。近来，基于I–III–VI的多元半导体，例如AgInS ₂和CuInS ₂，已经成为对环境有益的光催化剂的有前途的替代品。在这项工作中，我们制备了由合金化的ZnSe–AgInSe ₂（ZAISe）半导体组成的量子点（QD），并评估了它们对氢（H ₂）的光催化活性。） 生产。通过单独控制Zn和Ag的比例，即（Ag + In）/（Zn + Ag + In）和Ag /（Ag + In）的比例，可以微调ZAISe QD的能带结构以改善它们的光催化活性。ZAISe QDs的光催化反应的反应光谱显示，整个可见光区域在400至700 nm范围内具有旺盛的活性。在600 nm照射下，H ₂产生的最高表观量子产率达到3.4％。