An oriented built-in electric field induced by cobalt surface gradient diffused doping in MgIn2S4 for enhanced photocatalytic CH4 evolution

Abstract

A gradient cobalt-doped MgIn₂S₄ (MgIn₂S₄–Co) homojunction photocatalyst was reported, creating an oriented built-in electric field for efficient extraction of photogenerated carriers from the inside to the surface of the photocatalyst. The MgIn₂S₄–Co photocatalysts showed remarkably enhanced photocatalytic CO₂ reduction activity compared with pristine MgIn₂S₄.