异质结
材料科学
光降解
光催化
兴奋剂
吸附
肖特基势垒
蚀刻(微加工)
吸收(声学)
化学工程
纳米技术
光电子学
催化作用
图层(电子)
化学
复合材料
二极管
物理化学
工程类
生物化学
作者
Qui Thanh Hoai Ta,Nghe My Tran,Nguyen Ngoc Tri,Adem Sreedhar,Jin−Seo Noh
标识
DOI:10.1016/j.cej.2021.131437
摘要
[email protected]2/Ti3C2Tx heterostructures were synthesized in situ from Ti3AlC2 MAX phase by a combination of high-temperature Si diffusion and HF etching. The optimal processing conditions and optimal structure were set up. For the optimal heterostructure, small TiO2 particles were distributed over Ti3C2Tx MXene with significantly increased surface area. Unlike Ti3C2Tx MXene, the [email protected]2/Ti3C2Tx heterostructure behaved like a semiconductor. The heterostructure demonstrated superb 2,4-Dinitrophenol (DNP) photodegradation capability and good room-temperature NO2-sensing performance. In particular, the remarkable photocatalytic DNP degradation was explained on the basis of the broad-range light absorption and effective carrier separation by the Schottky contact. Furthermore, density-functional theory (DFT) calculations indicated that Si atoms might facilitate the NO2 adsorption process. The output of this work may highlight the potential of [email protected]2/Ti3C2Tx heterostructure as a multi-functioning nanomaterial.
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