In this work, environmentally friendly photocatalysts with attractive catalytic properties are reported that have been prepared by introducing SnO₂ quantum dots (QDs) directly onto ZnSe(N₂H₄)_0.5 substrates to induce advantageous charge separation. The SnO₂/ZnSe(N₂H₄)_0.5 nanocomposites could be easily synthesized through a one‐pot hydrothermal process. Owing to the absence of capping ligands, the attached SnO₂ QDs displayed superior photocatalytic properties, generating many exposed reactive surfaces. Moreover, the addition of a specified amount of SnO₂ boosted the visible‐light photocatalytic activity; however, the presence of excess SnO₂ QDs in the substrate resulted in aggregation and deteriorated the performance. The spectroscopic data revealed that the SnO₂ QDs act as a photocatalytic mediator and enhance the charge separation within the type II band alignment system of the SnO₂/ZnSe(N₂H₄)_0.5 heterojunction photocatalysts. The separated charges in the heterojunction nanocomposites promote radical generation and react with pollutants, resulting in enhanced photocatalytic performance.

中文翻译：

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通过 SnO2 /ZnSe(N2 H4 )0.5 异质结纳米催化剂中的电荷分离促进可见光光催化氧化还原反应。

在这项工作中，报道了通过将SnO ₂量子点（QD）直接引入到ZnSe(N ₂ H ₄ ) _0.5基底上以诱导有利的电荷分离来制备具有有吸引力的催化性能的环境友好型光催化剂。SnO ₂ /ZnSe(N ₂ H ₄ ) _0.5纳米复合材料可以通过一锅水热法轻松合成。由于不存在封端配体，附着的 SnO ₂ QD 显示出优异的光催化性能，产生许多暴露的反应表面。此外，添加一定量的SnO ₂提高了可见光光催化活性。然而，基底中过量SnO ₂ QD的存在会导致聚集并降低性能。光谱数据表明，SnO _{2 QD 作为光催化介体，增强了 SnO 2} /ZnSe(N ₂ H ₄ ) _0.5异质结光催化剂的 II 型能带排列系统内的电荷分离。异质结纳米复合材料中分离的电荷促进自由基产生并与污染物发生反应，从而增强光催化性能。