4.6 Article

ZnIn2S4 nanosheet growth on amine-functionalized SiO2 for the photocatalytic reduction of CO2

期刊

CATALYSIS SCIENCE & TECHNOLOGY
卷 12, 期 2, 页码 606-612

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cy01740c

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资金

  1. National Natural Science Foundation of China [21978032, 21676045, 21770643, 21802131]
  2. Natural Science Foundation of Liaoning Province [201602169]
  3. Fundamental Research Funds for the Central Universities [DUT18LK34, DUT19TD28]

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This study demonstrates the effectiveness of ZnIn2S4-loaded NH-SiO2 for visible-light driven CO2 photocatalytic reduction, with significantly improved CO production rates attributed to enhanced charge separation efficiency and active sites provided by amine groups.
The photocatalytic reduction of CO2 into valuable fuels and sustainable energy has a promising future, yet remains a challenge due to low charge separation efficiency and inadequate active sites. We find that ZnIn2S4-loaded secondary amine-functionalized organic silica (ZnIn2S4/NH-SiO2) was effective for visible-light driven CO2 photocatalytic reduction. The ZnIn2S4/NH-SiO2 with 40% ZnIn2S4 content achieves a CO production rate of 1304.8 mu mol g(-1) h(-1) at room temperature, which is about 3 times higher than that of pristine ZnIn2S4. The thin ZnIn2S4 nanosheet accelerates the separation of photogenerated electron pairs, and the amine groups on ZnIn2S4/NH-SiO2 act as active sites for adsorption and activation of CO2, hence facilitating the photoreduction of CO2.

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