CC BY 4.0 UnportedSivasankaran, R.P.Rockstroh, N.Kreyenschulte, C.R.Bartling, S.Lund, H.Acharjya, A.Junge, H.Thomas, A.Brückner, A.2020-07-132020-07-132019https://doi.org/10.34657/3514https://oa.tib.eu/renate/handle/123456789/4885MoS2/C3N4 (MS-CN) composite photocatalysts have been synthesized by three different methods, i.e., in situ-photodeposition, sonochemical, and thermal decomposition. The crystal structure, optical properties, chemical composition, microstructure, and electron transfer properties were investigated by X-ray diffraction, UV-vis diffuse reflectance spectroyscopy, X-ray photoelectron spectroscopy, electron microscopy, photoluminescence, and in situ electron paramagnetic resonance spectroscopy. During photodeposition, the 2H MoS2 phase was formed upon reduction of [MoS4]2− by photogenerated conduction band electrons and then deposited on the surface of CN. A thin crystalline layer of 2H MoS2 formed an intimate interfacial contact with CN that favors charge separation and enhances the photocatalytic activity. The 2H MS-CN phase showed the highest photocatalytic H2 evolution rate (2342 µmol h−1 g−1, 25 mg catalyst/reaction) under UV-vis light irradiation in the presence of lactic acid as sacrificial reagent and Pt as cocatalyst.enghttps://creativecommons.org/licenses/by/4.0/540C3N4Charge separation and transferComposite catalystsMoS2Photocatalytic hydrogen productionArticle