Construction of Cu3Mo2O9/Mn0.3Cd0.7S S-Scheme Heterojunction for Photocatalytic Hydrogen Production via Water Splitting
YU Jiahui
YAO Xintong
SU ping
WANG Shikai
ZHANG Dafeng
GE Bo
PU Xipeng
Abstract：A S-scheme heterojunction photocatalyst Cu3Mo2O9/Mn0.3Cd0.7S was synthesized using an ul-trasonic assisted grinding-calcination method.The physical and chemical properties of samples,such as crystal phase,morphology,chemical elemental composition,and optical absorption ability were character-ized through X-ray powder diffraction,scanning electron microscopy,X-ray photoelectron spectroscopy,and solid-state UV-visible diffuse reflectance and other characterization techniques.The photocatalytic hy-drogen production experiment was carried out under visible and near-infrared light irradiation.The results showed that the photocatalytic hydrogen production performance of Cu3Mo2O9/Mn0.3Cd0.7S composited material was superior to both Mn0.3Cd0.7S and Cu3Mo2O9.Among them,The Cu3Mo2O9/Mn0.3 Cd0.7S with a mass fraction of 1％Cu3Mo2O9 demonstrated the highest photocatalytic activity,with a hydrogen production rate of 1.554 mmol·h-1·g-1,which is 5.5 time of Mn0.3Cd0.7S.Notably,even after under-going four cycling experiments,it retained remarkable photocatalytic performance.Furthermore,accord-ing to the results of electrochemical test and infrared thermal imaging,a plausible mechanism was pro-posed,and the synergistic effects of the S-scheme heterojunction and the photothermal effect of Cu3Mo2O9 is the key to improve the photocatalytic activity of Cu3 Mo2O9/Mn0.3Cd0.7S.
Keywords：hydrogen production via water splittingS-scheme heterojunctionMn0.3Cd0.7SCu3Mo2O9photothermal effect
Publication Date：2024-02-28
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：10( 52-61 )