Interfacial Engineering of the Platinum/Molybdenum Disulfide/graphitic Carbon Nitride Composite for Enhanced Photocatalytic Hydrogen Production

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 MoS 2 nanosheets were deposited on the surface of g-C 3 N 4 as cocatalysts. The presence of MoS 2 can effectively induce the structural reconstruction of g-C 3 N 4 and the redistribution of surface charges. The enriched electrons localized in the S and N atoms were conductive to the reduction of Pt 4+ and the promotion of the metal− support interaction, thus boosting charge separation and transfer. As a result, the obtained Pt/MoS 2 /g-C 3 N 4 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-C 3 N 4 . This work may provide some insights into the rational design of high-efficient composite photocatalysts for solar energy conversion.

Construction of a binary S-scheme S-g-C3N4/Co-ZF heterojunction with enhanced spatial charge separation for sunlight-driven photocatalytic performance

“…[13][14][15] Organic pollutant elimination is a well-established potential of photon-initiated oxidation processes, notably photocatalysis. [16][17][18][19][20] This method's notable benets include the utilization of inexpensive photons, mild working temperatures, nontoxic photocatalysts, and full mineralization. [21][22][23][24][25][26] Light absorption, photocatalytic redox interactions with reactive radicals, and the separation and transport of the photogenerated electron-hole pair are generally the three key components of the photocatalytic process.…”

Metal Sulfide Photocatalysts for Hydrogen Generation: A Review of Recent Advances

“…This is ∼13.3 and ∼1532.3 times enhancement in comparison with the Pt NPs/g-C 3 N 4 nanosheets and pristine g-C 3 N 4 nanosheets, respectively. In another study, ultrasmall fine Pt NPs and MoS 2 nanosheets were deposited on the surface of g-C 3 N 4 as co-catalyst [114]. While MoS 2 could efficiently induce structural reconstruction of g-C 3 N 4 , resulting in surface charge redistribution, the boosted electrons localized in the S and N atoms were conducive to the reduction of Pt 4+ via strong metal-support contact, hence enhancing charge separation and transfer.…”

Boosting interlayer charge transfer in polymeric carbon nitride by Mo ions for efficient photocatalytic H2 evolution

“…However, g-C 3 N 4 has a relatively narrow response range to visible light, and easy recombination of photogenerated electrons and holes, which limits its catalytic performance. [4][5][6][7][8] Several strategies have been employed to improve the photocatalytic efficiency, including heterostructure construction with other semiconductors, [9][10][11] nanostructure formation, [12][13][14] metal doping [15][16][17] and non-metallic doping. 18,19 Among all of those modification techniques, intercalation of metal ions in the triangle vacancies can not only effectively inhibit the recombination of photogenerated electron/hole pairs, but also increase the surface reaction sites of g-C 3 N 4 , since the triangle vacancy is an ideal site to anchor the metal ion by forming coordinated bonds with N atoms with lone electrons.…”