材料科学
光催化
甲基橙
肖特基势垒
热液循环
化学工程
载流子
透射电子显微镜
密度泛函理论
MXenes公司
过渡金属
催化作用
纳米技术
光电子学
计算化学
化学
工程类
二极管
生物化学
作者
Feng Peng,Xianfeng Yang,Yuhang Li,Hao Yu,Hongjuan Wang,Feng Peng
标识
DOI:10.1021/acsami.5b11973
摘要
Effectively harvesting light to generate long-lived charge carriers to suppress the recombination of electrons and holes is crucial for photocatalytic reactions. Exposing the highly active facets has been regarded as a powerful approach to high-performance photocatalysts. Herein, a hybrid comprised of {001} facets of TiO2 nanosheets and layered Ti3C2, an emerging 2D material, was synthesized by a facile hydrothermal partial oxidation of Ti3C2. The in situ growth of TiO2 nanosheets on Ti3C2 allows for the interface with minimized defects, which was demonstrated by high-resolution transmission electron microscopy and density functional theory calculations. The highly active {001} facets of TiO2 afford high-efficiency photogeneration of electron–hole pairs, meanwhile the carrier separation is substantially promoted by the hole trapping effect by the interfacial Schottky junction with 2D Ti3C2 acting as a reservoir of holes. The improved charge separation and exposed active facets dramatically boost the photocatalytic degradation of methyl orange dye, showing the promise of 2D transition metal carbide for fabricating functional catalytic materials.
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