Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 2021, Issue 7, Pages 681-687Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202001017
Keywords
Metal-organic framework materials; Photocatalysts; CO2 reduction; Polyoxometalate; Composite material
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Funding
- Natural Science Foundation of Chongqing [cstc2019jcyj-msxm0851]
- Scientific Research Project of Chongqing University of Education [KY201906B]
- Young Teachers Development Plan of Chongqing University of Education [YX-2019-01]
- Key Laboratory for Green Chemical Technology of Chongqing University of Education [2016xjpt08]
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In the CO2 photoreduction process, the composite of silicomolybdic acid supported on sulfonic acid-modified MIL-101-Cr demonstrates significantly improved CO yield and selectivity, attributed to the synergistic effect between the two components, which effectively promotes the separation of photogenerated carriers and inhibits the recombination of electron-hole pairs.
Silicomolybdic acid is supported on the sulfonic acid-modified MIL-101-Cr by diffusion method, which increases the metal active sites on the surface of the material while maintains the structural integrity of MIL-101. The CO yield of composite SiMo12O40@SO3H-MIL-101-Cr in CO2 photoreduction is as high as 82.95 mu mol/(g . h), and the CO selectivity is 93.2 %. The improvement in the catalytic performance of the composite can be attributed to the synergistic effect of the sulfonic acid group and the silicomolybdic acid molecule, which could effectively promote the separation of photogenerated carriers and inhibit the recombination of photogenerated electrons and hole pairs.
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