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Study on photocatalytic benzyl alcohol oxidation coupled with hydrogen production over Pd/ZnIn2S4 nanosheets
Received date: 2024-04-09
Online published: 2024-05-09
In this work，Pd particles loaded two-dimensional ZnIn2S4 nanosheets were prepared by a solvothermal-photodeposition method for coupling photocatalytic reactions of benzyl alcohol oxidation and hydrogen production.When the Pd loading was 1.0%（mass fraction），the photocatalytic performance was best.The production rates of benzaldehyde and hydrogen achieved 3 804.1 and 4 629.8 µmol/（g·h），and the selectivity of benzaldehyde was 80.0% under visible light.The morphology and structure of the photocatalysts were characterized using XRD，TEM and XPS，and the optical and photoelectrochemical properties were characterized through PL spectra，tr-PL spectra，EIS spectra and UV-visible spectra.It was found that loading of Pd particles enhanced the absorption of visible light due to its surface plasmon resonance effect.The separation efficiency of carriers was effectively promoted due to the transfer of photogenerated electrons in the conduction band of ZnIn2S4 to Pd with low Fermi level，thereby improving the performance of photocatalytic redox reactions.In addition，a possible mechanism for the photocatalytic oxidation of benzyl alcohol coupling with hydrogen evolution was proposed，i.e.，benzyl alcohols were oxidized to benzaldehyde by photogenerated holes，while the protons from benzyl alcohol were reduced to H2 by photogenerated electrons.
Key words： photocatalysis; benzyl alcohol oxidation; hydrogen evolution; ZnIn2S4; noble metal
SUN Qinghao , LI Keyan , GUO Xinwen . Study on photocatalytic benzyl alcohol oxidation coupled with hydrogen production over Pd/ZnIn2S4 nanosheets[J]. Inorganic Chemicals Industry, 2025 , 57(1) : 113 -119 . DOI: 10.19964/j.issn.1006-4990.2024-0198
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