Charge separation plays a crucial role in semiconductor-based photocatalytic CO₂ conversion. Herein, we developed a photo-magnetic coupling reactor to manipulate a unique induced electric field, which can control carrier behavior at the minuscule and boost the photocatalytic reduction of CO₂. A monolithic photocatalyst consisting of a copper foam substrate and nanosized ZnO/NiO/Au heterostructures was designed to couple the rotating magnetic field (RMF) in the reactor. Specifically, induced electric field is generated by copper foam cutting the magnetic induction line, which can increase the charge carrier density by preventing their recombination. Moreover, NiO and Au synergistically magnify the charge separation as the active sites for the oxidation and reduction reaction, respectively. The utilization rate of photogenerated electrons increases by 5.24 times after coupling RMF, with the yields of CO and CH₄ improved by 5.50 times and 5.18 times. This strategy of integrating the distinct RMF into the reaction provides new insights for improving photocatalytic CO₂ conversion.

_{电荷分离在基于半导体的光催化CO 2}转化中起着至关重要的作用。在此，我们开发了一种光磁耦合反应器来操纵独特的感应电场，可以控制微小的载流子行为并促进CO 2 的光催化_还原。设计了一种由泡沫铜基板和纳米级 ZnO/NiO/Au异质结构组成的整体式光催化剂，用于耦合反应器中的旋转磁场 (RMF)。具体来说，通过泡沫铜切割磁感应线产生感应电场，可以通过防止它们的复合来增加电荷载流子密度。此外，NiO 和 Au 作为活性位点协同放大电荷分离分别是氧化反应和还原反应。耦合RMF后光生电子利用率提高了5.24倍，CO和CH ₄的产率分别提高了5.50倍和5.18倍。这种将独特的 RMF 整合到反应中的策略为提高光催化 CO ₂转化率提供了新的见解。