A series of Cu₂O-loaded Zn-Cr layered double hydroxides (LDHs) was prepared via an in situ reduction process from Cu-Zn-Cr ternary LDHs and applied to the photoreduction of CO₂. The formation of Cu₂O nanoparticles and the preservation of the LDH structure was confirmed by X-ray diffraction and transmission electron microscopy. Among the loaded LDHs, the 0.1Cu₂[email protected]_1.8Cr LDH exhibited optimal activity for the conversion of CO₂ into CO in pure water and was superior to both the corresponding Cu-Zn-Cr ternary LDH and pristine Zn₂Cr LDHs. In addition, the production of CO was further promoted by increasing the solubility of CO₂ using a nano-bubble solution instead of pure water. The loaded Cu₂O nanoparticles probably function as effective electron traps, promoting charge separation and providing active sites for CO₂ reduction.

通过原位还原法从Cu-Zn-Cr三元LDHs中制备了一系列负载Cu ₂ O的Zn-Cr层状双氢氧化物（LDHs），并将其用于CO ₂的光还原。X射线衍射和透射电子显微镜证实了Cu ₂ O纳米颗粒的形成和LDH结构的保留。在负载的LDH中，0.1Cu ₂ [受电子邮件保护] _1.8 Cr LDH在纯水中将CO ₂转化为CO表现出最佳活性，并且优于相应的Cu-Zn-Cr三元LDH和原始Zn ₂Cr LDHs。另外，通过使用纳米气泡溶液代替纯水增加CO ₂的溶解度，进一步促进了CO的产生。负载的Cu ₂ O纳米颗粒可能起到有效的电子陷阱的作用，促进电荷分离并提供还原CO _2的活性位。