S型异质结光催化剂ZnFe2O4/WO3的构筑及光催化还原CO2性能

通过在WO₃纳米片表面负载ZnFe₂O₄纳米颗粒，构建了一系列S型异质结光催化剂ZnFe₂O₄/WO₃，并研究了其光催化CO₂还原性能。在没有助催化剂和牺牲剂的条件下，所制备的ZnFe₂O₄/WO₃复合材料可对CO₂与水蒸汽进行光催化反应。优化后的材料光照5 h后CO₂还原产物CO和CH₄的产量分别为7.87和4.88 μmol·g^-1。相对于单相组分，CO和CH₄的产量明显提高。光催化活性的提高，归因于ZnFe₂O₄和WO₃异质结的形成以及光生载流子的S型电荷传输模式。

Construction and photocatalytic CO2 reduction performance of S-scheme heterojunction ZnFe2O4/WO3 catalysts

A series of ZnFe₂O₄/WO₃ photocatalysts were constructed by loading ZnFe₂O₄ nanoparticles on the surface of WO 3 nanosheets, and their performance for photocatalytic CO₂ reduction was studied. Under the conditions of no cocatalysts and sacrificial agents, the prepared ZnFe₂O₄/WO₃ composite materials can catalyze the reaction between CO₂ and water vapor. After illumination for 5 h, the yields of CO₂ reduction products CO and CH₄ of the optimal material were 7.87 and 4.88 μmol·g^-1, respectively. Compared to its counterparts, the yields of CO and CH₄ were improved. The increased photocatalytic activity of ZnFe₂O₄/WO₃ is attributed to the formation of heterojunctions between ZnFe₂O₄ and WO₃ as well as the S-scheme charge transfer mode of the photogenerated carriers, both of which are conducive to separation efficiency of photo-generated carriers and photocatalytic CO₂ reduction activity.