Interfacial Engineering of the Platinum/Molybdenum Disulfide/graphitic Carbon Nitride Composite for Enhanced Photocatalytic Hydrogen Production
Jianjun Ding, Lili Song, Xiangyang Li, Lin Chen, Xiaoxiao Li, Jun Sun, Xian Zhang, Yuqiao Wang, Xingyou Tian
Abstract
Construction of effective charge separation and transfer channels is a critical issue in photocatalytic energy conversion. In this work, ultrasmall fine Pt nanoparticles and MoS2 nanosheets were deposited on the surface of g-C3N4 as cocatalysts. The presence of MoS2 can effectively induce the structural reconstruction of g-C3N4 and the redistribution of surface charges. The enriched electrons localized in the S and N atoms were conductive to the reduction of Pt4+ and the promotion of the metal–support interaction, thus boosting charge separation and transfer. As a result, the obtained Pt/MoS2/g-C3N4 composite provided a highly photocatalytic hydrogen activity, up to 1595.3 μmol h–1 with an AQE of 30.9% at 435 nm, 87.6 times higher than g-C3N4. This work may provide some insights into the rational design of high-efficient composite photocatalysts for solar energy conversion.