S-Scheme Heterojunction Formed by Mo-Doped ZnIn2S4 Nanosheets and SrTiO3 Nanorods as Catalyst for Formaldehyde Degradation under Visible Light

The utilization of solar energy for pollutants removal is of critical importance for future society developments. In this paper, photocatalysts (Mo-ZIS/STO) compositing Mo-modified ZnIn2S4 (ZIS) nanosheets with SrTiO3 (STO) nanorods are prepared by electrostatic spinning. Mo dopant in S-scheme heterojunction widens the available spectral range and enhanced interfacial electric field effect (IEF), Mo0.05-ZIS/STO catalyst achieved 73.1% formaldehyde removal within 1 h. The intermediates produced during the removal of formaldehyde were characterized using in-situ DRIFTS. This work offers a perspective on the construction of photocatalytic field with metal doping and S-scheme heterojunctions, with the aim of enhancing photocatalytic performance.