Superior Dual Functional S-Scheme NiMoO4/Mg–Al LDH Heterojunction for Simultaneous Redox Photocatalysis

Abstract

A heterojunction photocatalyst, NiMoO₄/Mg-Al layered-diuble hydroxide (LDH) was synthesized for simultaneous chloramphenicol degradation and Cr(VI) reduction under visible light. It outperformed individual components (NMO, LDH) and composites, maintaining >90% efficiency over five cycles. Synergy involved •OH/O₂-−mediated chloramphenicol oxidation and direct electron transfer for Cr(VI) reduction, confirmed by LC-MS and scavenger studies.