材料科学
光催化
异质结
纳米线
半导体
载流子
能量转换
氧化还原
纳米技术
光电子学
催化作用
化学
有机化学
热力学
物理
冶金
作者
Jingyu Li,Yuehua Li,Fan Zhang,Zi‐Rong Tang,Yi‐Jun Xu
标识
DOI:10.1016/j.apcatb.2020.118783
摘要
Exploiting solar energy to photocatalyze integrated selective conversion of bioethanol into fine chemicals and hydrogen (H2) 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 H2 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 conductive 2D MXene and semiconductor 1D CdS NWs benefits the separation and migration of charge carriers. Furthermore, CH(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 H2 evolution in a sustainable manner.
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