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Issue 28, 2014
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Semiconductor–redox catalysis promoted by metal–organic frameworks for CO2 reduction

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Abstract

A noble-metal-free system for photochemical reduction of CO2 has been developed by integrating graphitic carbon nitride (g-C3N4) with a cobalt-containing zeolitic imidazolate framework (Co-ZIF-9). g-C3N4 acts as a semiconductor photocatalyst, whereas Co-ZIF-9 is a cocatalyst that facilitates the capture/concentration of CO2 and promotes light-induced charge separation. The two materials cooperate efficiently to catalyze CO2-to-CO conversion upon visible light illumination under mild reaction conditions. A 13C-labelled isotropic experiment proved that CO2 is the carbon source of the produced CO. Even without noble metals, the system still achieved an apparent quantum yield of 0.9 percent. The system displayed high photocatalytic stability, without noticeable alterations in the chemical and crystal structures of g-C3N4 and Co-ZIF-9 after the reaction.

Graphical abstract: Semiconductor–redox catalysis promoted by metal–organic frameworks for CO2 reduction

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Supplementary files

Article information


Submitted
19 May 2014
Accepted
29 May 2014
First published
02 Jun 2014

Phys. Chem. Chem. Phys., 2014,16, 14656-14660
Article type
Communication

Semiconductor–redox catalysis promoted by metal–organic frameworks for CO2 reduction

S. Wang, J. Lin and X. Wang, Phys. Chem. Chem. Phys., 2014, 16, 14656
DOI: 10.1039/C4CP02173H

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