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Creating Chemisorption Sites for Enhanced CO Photoreduction Activity through Alkylamine Modification of MIL-101(Cr).

08:00 EDT 5th July 2019 | BioPortfolio

Summary of "Creating Chemisorption Sites for Enhanced CO Photoreduction Activity through Alkylamine Modification of MIL-101(Cr)."

The lower CO2 utilization and poor charge conductivities have limited the application of MOFs in photocatalysis. In this work, different alkylamines (Ethylenediamine (EN), Diethylenetriamine (DETA) and Triethylenetetramine (TETA) ) were successfully introduced into MIL-101-Cr by post-modification and created abundant CO2 chemisorption sites in structures. Photocatalysis reaction showed that the alkylamine-modification promoted the charge separation and migration rate, and enhanced the reduction potential of electron generated by the MOF photocatalyst. Among them, the EN-modified material exhibits the highest CO generation rate of 47.2 µmol·h-1·g-1 with high selectivity of 96.5 %, much superior than the pristine MOFs MIL-101-Cr, MIL-101-SO3H, as well as the DETA and TETA-modified products, which can be ascribed to the abundant chemisorption sites for CO2 reactants and the optimized pore size in structure. The strategy of introduction of alkylamines group as CO2 chemisorption sites has been demonstrated to be a new pathway for design of efficient MOF catalyst for CO2 photoreduction.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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