The development of durable and effective photocatalysts is significant for realizing efficient photocatalytic CO₂ conversion. In this work, heteroatom doped Zn–In–S colloidal nanocrystals are fabricated via a facile method, which can be utilized for photocatalytic CO₂ reduction under visible light in the presence of triethanolamine. Among various dopants, Ag shows the most effectiveness for improving the photocatalytic CO₂ reduction performance of Zn–In–S colloidal nanocrystals. The optimized Ag doped Zn–In–S colloidal nanocrystals with doping amount of 1.13 wt% exhibit the highest photocatalytic CO₂ reduction performance with a CO evolution rate of 30.29 μmol h⁻¹, achieving high selectivity of 96.06%. The photocatalytic mechanism study indicates that increasing the doping amount of Ag in Zn–In–S colloidal crystals would result in the improved visible light harvesting ability, increased charge carrier lifetime and weakened reduction potential of electrons, which exert a synergistic effect on the CO₂ photoreduction.

中文翻译：

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揭示 Zn-In-S 胶体纳米晶体中 Ag 掺杂剂对促进可见光驱动光催化 CO2 还原的影响


开发耐用且有效的光催化剂对于实现高效光催化CO ₂转化具有重要意义。在这项工作中，通过一种简便的方法制备了杂原子掺杂的Zn-In-S胶体纳米晶体，可用于在三乙醇胺存在下在可见光下光催化CO ₂还原。在各种掺杂剂中，Ag对于提高Zn-In-S胶体纳米晶的光催化CO ₂还原性能最有效。优化后的Ag掺杂Zn-In-S胶体纳米晶，掺杂量为1.13 wt%，表现出最高的光催化CO ₂还原性能，CO析出率为30.29 μmol h ^-1 ，选择性高达96.06%。光催化机理研究表明，增加Zn-In-S胶体晶体中Ag的掺杂量会提高可见光捕获能力，增加载流子寿命并减弱电子的还原电位，从而对CO ₂产生协同效应光还原。