Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 269, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118783
Keywords
Photoredox coupling reaction; 1,1-diethoxyethane; Ti3C2Tx MXene; Aldolization
Funding
- NSFC [20903023, 21872029, 21173045, U1463204]
- Independent Research Project of State Key Laboratory of Photocatalysis on Energy and Environment [2014A05]
- Award Program for Minjiang Scholar Professorship
- NSF of Fujian Province [2017J07002, 2019J0106]
- 1st Program of Fujian Province for Top Creative Young Talents
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Exploiting solar energy to photocatalyze integrated selective conversion of bioethanol into fine chemicals and hydrogen (H-2) is a promising avenue in response to current energy and environmental crises. Herein, we have reported the mild synthesis of a binary heterostructure of CdS-Ti3C2Tx MXene (CdS-MX) combining one-dimensional (1D) CdS nanowires (NWs) with two-dimensional (2D) MXene structure, and its application in photocatalytic coupling redox reaction of H-2 evolution and selective conversion of bioethanol into 1,1-diethoxyethane (DEE) under acidic conditions. The results reveal that the synergistic effect of the intimate interfacial contact and matched energy level alignment between electrically conducive 2D MXene and semiconductor 1D CdS NWs benefits the separation and migration of charge carriers. Furthermore, (CH)-C-center dot(OH)CH3 has been proven to be the pivotal radical intermediate during photoredox process. This work is anticipated to stimulate further interest on rational construction of MXene-semiconductor based composites toward photoredox coupling organic synthesis and H-2 evolution in a sustainable manner.
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