One‐Step Synthesis of CdS/S‐Doped G‐C 3 N 4 Composite Catalyst with Promoted Photocatalytic Hydrogen Peroxide Production Ability

Abstract H 2 O 2 is recognized as one of the most significant chemicals, with the extensive applications across various fields. This study presents the in situ synthesis of CdS/S‐doped g‐C 3 N 4 composite photocatalysts (CdS/CNS) via a simple one‐step thermal polymerization method by using thiourea and cadmium nitrate as precursors. The synthesized materials were characterized by using XRD, N 2 adsorption, UV–vis, XPS, TEM, ESR, EIS, and PL analysis. Experimental results have indicated that the H 2 O 2 production rate on CdS/CNS composite photocatalyst was 4.2 times higher than that of single CNS under visible light illumination, as well as the commendable catalytic stability. The formed photocatalytic system effectively reduced the recombination rate of photo‐generated electron‐hole pairs, promoted the response range of visible light, and enhanced the specific surface area of the catalyst. A preliminary discussion on potential reaction mechanisms was also provided.