Fabrication of nanocomposite MoC–Mo2C@C/Cd0.5Zn0.5S: promoted electron migration and improved photocatalytic hydrogen evolution. Issue 30 (12th July 2022)

• Record Type: Journal Article
• Authors: Wei, Tingting; Zhang, Tingting; Jin, Zhanbin; Li, Fengyan; Xu, Lin
• Is Part Of: Dalton transactions. Volume 51:Issue 30(2022)
• Page Start: 11397
• Page End: 11403
• Publication Date: 2022-07-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt00825d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : When the mass of MMC nanosheets was 1% of ZCS nanorods (1-MMC/ZCS), the photocatalytic hydrogen evolution rate of ZCS nanorods was up to 68.8 mmol h −1 g −1 . Under 420 nm monochromatic light, the apparent quantum efficiency of 1-MMC/ZCS is 32.9%. Abstract : In this work, we successfully prepared composites of carbon-modified in-phase MoC–Mo2 C (MoC–Mo2 C@C, MMC) nanosheets with Cd0.5 Zn0.5 S (ZCS) nanorods. The loading of MMC nanosheets significantly improved the hydrogen production rate of ZCS nanorods. The results showed that the photocatalytic hydrogen production rate of ZCS is the highest when MMC nanosheets are 1 wt% of ZCS nanorods (1-MMC/ZCS), reaching 68.8 mmol h −1 g −1, which is 7.7 times that of pure ZCS nanorods. The 1-MMC/ZCS photocatalyst was measured with Na2 S/Na2 SO3 as a hole sacrifice reagent under irradiation with 420 nm monochromatic light, and the quantum efficiency of 1-MMC/ZCS was 32.9%. The carbon layer can promote the rapid transfer of photogenerated electrons, and in-phase Mo2 C–MoC as the active site can synergistically improve the photocatalytic hydrogen production rate of ZCS. Most Mo2 C-based materials are still used in the field of electrocatalysis. This study provides a new idea for exploring new molybdenum-based co-catalyst materials in the field of visible light catalytic hydrogen production.