Synthesis and Characterization of Amorphous Molybdenum Sulfide (MoSx)/CdIn2S4 Composite Photocatalyst: Co-Catalyst Using in the Hydrogen Evolution Reaction

Abstract

Co-catalyst deposition is used to improve the surface and electrical properties of photocatalysts. In this work, MoSx/CdIn2S4 nanocomposites were prepared by a facile hydrothermal and photodeposition route. The basic crystalline phases and morphology of the as-prepared samples were determined, and these results showed that MoSx was tightly anchored onto CdIn2S4 by sharing the same S atom. In the hydrogen production experiments, MoSx/CdIn2S4-40 displayed the optimal photocatalytic hydrogen production yield in 4 h. The H2 evolution rate reached 2846.73 μmol/g/h, which was 13.6-times higher than that of pure CdIn2S4. Analyzing the photocatalytic enhancement mechanisms revealed that this unique structure had a remarkable photogenerated electron-hole pair separation efficiency, rapid charge carrier transfer channels, and more abundant surface reaction sites. The use of co-catalyst (MoSx) greatly improved the photocatalytic activity of CdIn2S4.

MoSx/ZnS on CuO/Cu Mesh Composite Catalyst for Enhanced Photocatalytic N2 Reduction

“…The peak of binding energy of 228.9 eV is Mo 4+ 3d 5/2 (Figure c). − The three peaks of S 2p 3/2 , S 2p 1/2 and S 2p appear at 161.6 eV, 162.7, and 167.9 eV (Figure d), corresponding to S 2p in S compounds. ,, The weak peak at 163.1 eV indicates that unsaturated S atoms existed in the sample. The S atom in the sample exists in the form of S 2– and S2- 2, which is consistent with the reported results of MoS x . − …”

“…49 The amorphous MoS x with uneven organization and long-range disturbed layer is rich in unsaturated sulfur atoms, which can adsorb and activate inert N 2 molecules. 50 Meanwhile, MoS x also has excellent light absorption and photothermal properties. In the present work, the CuO/CM substrate was prepared by chemical oxidation.…”

“…As a wide band gap semiconductor, ZnS has the advantages of excellent transmission performance, high electron mobility and nontoxicity . The amorphous MoS x with uneven organization and long-range disturbed layer is rich in unsaturated sulfur atoms, which can adsorb and activate inert N 2 molecules . Meanwhile, MoS x also has excellent light absorption and photothermal properties.…”

Fabrication of Noble-Metal-Free Mo2C/CdIn2S4 Heterojunction Composites with Elevated Carrier Separation for Photocatalytic Hydrogen Production

“…The photocatalytic H 2 evolution reaction was operated in a typical reaction system according to our previous reports [ 40 , 41 , 42 ]. The photocatalytic experiment was carried out under visible light (λ ≥ 420 nm).…”

Recent Advances in Nanoscale Engineering of Ternary Metal Sulfide-Based Heterostructures for Photocatalytic Water Splitting Applications

“…In this regard, coupling CdIn 2 S 4 with other materials with metallic or semiconducting properties in forming heterostructures has been conducive to overcoming the aforementioned limitations. Recently, Li et al explored the pertinent construction of amorphous MoS x with CdIn 2 S 4 in forming a metal–semiconductor Schottky junction. The study suggested that MoS x is a potential cocatalyst candidate for a metal substituent owing to its abundant active centers associated with unsaturated atoms in catalyzing the HER .…”