Solar photocatalysis provides a green and sustainable platform for the selective C–C coupling of aryl alcohols, while the selectivity of hydrobenzoin needs to be improved significantly for commercial applications. This requires the design of an economical photocatalyst to optimise the selectivity as well as the conversion of reactants. Herein, we constructed a Z-scheme ZnS/ZnIn₂S₄ heterojunction with sulphur vacancies for a photoredox system to achieve the selective C–C coupling of benzyl alcohol to obtain valuable hydrobenzoin under ambient conditions. ZnS/ZnIn₂S₄-2 as an optimal photocatalyst outperformed the reported photocatalysts to achieve a 92% yield of hydrobenzoin within 2 h. The appropriate sulphur vacancies promoted the separation and transfer of photoexcited carriers, remarkably enhancing the photocatalytic performance. Compared with pristine ZnS and ZnIn₂S₄, this heterojunction construction demonstrated an optimised electronic structure, broadened visible-light absorption, and good compatibility with environmental conditions. These extraordinary characteristics make it a promising photocatalyst for the extended synthesis of value-added hydrobenzoin.

中文翻译：

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Z型ZnS/ZnIn2S4上苯甲醇的光催化C-C偶联反应获得氢苯偶姻


太阳能光催化为芳醇的选择性C-C偶联提供了一个绿色和可持续的平台，而氢苯偶姻的选择性需要显着提高才能实现商业应用。这需要设计一种经济的光催化剂来优化选择性以及反应物的转化率。在此，我们构建了具有硫空位的Z型ZnS/ZnIn ₂ S ₄异质结用于光氧化还原系统，以实现苯甲醇的选择性C-C偶联，从而在环境条件下获得有价值的氢安息香。 ZnS/ZnIn ₂ S ₄ -2 作为最佳光催化剂，其性能优于报道的光催化剂，在 2 小时内实现了 92% 的苯偶姻产率。适当的硫空位促进了光生载流子的分离和转移，显着提高了光催化性能。与原始的ZnS和ZnIn ₂ S ₄相比，这种异质结结构表现出优化的电子结构、拓宽的可见光吸收以及与环境条件良好的兼容性。这些非凡的特性使其成为一种有前途的光催化剂，可用于增值苯二甲酸的扩展合成。