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  • MOF-based ternary nanocomposites for better CO 2 photoreduction: roles of heterojunctions and coordinatively unsaturated metal sites
Title: MOF-based ternary nanocomposites for better CO 2 photoreduction: roles of heterojunctions and coordinatively unsaturated metal sites
Semiconductors are the most widely used catalysts for CO 2 photoreduction. However, their efficiencies are limited by low charge carrier density and poor CO 2 activation. Towards solving these issues, a metal–organic framework (MOF)-based ternary nanocomposite was synthesized through self-assembly of TiO 2 /Cu 2 O heterojunctions via a microdroplet-based approach followed by in situ growth of Cu 3 (BTC) 2 (BTC = 1,3,5-benzenetricarboxylate). With increased charge carrier density and efficient CO 2 activation, the hybrid ternary nanocomposite exhibits a high CO 2 conversion efficiency and preferential formation of CH 4 . Systematic measurements by using gas chromatography, photoluminescence spectroscopy, X-ray photoelectron spectroscopy, and time-resolved in situ diffuse reflectance infrared Fourier transform spectroscopy reveal that the semiconductor heterojunction and the coordinatively unsaturated copper sites within the hybrid nanostructure are attributable to the performance enhancements.  more » « less
Award ID(s):
1727553
PAR ID:
10067167
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Journal of Materials Chemistry A
Volume:
6
Issue:
3
ISSN:
2050-7488
Page Range / eLocation ID:
932 to 940
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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