Redox-mediated photocatalysis towards separate hydrogen production and sulfide oxidation

Abstract

We present a redox-mediated photocatalysis for separate hydrogen production and sulfide oxidation. The process involves photocatalytic hydrogen production and Fe(CN)₆⁴⁻ oxidation, followed by spontaneous Fe(CN)₆³⁻ reduction and sulfide oxidation to valued sulfur. In this approach, Fe(CN)₆^4−/3− redox mediators were recycled, and the produced sulfur wouldn't interfere with the photocatalytic performance.