MXenes公司
纳米片
材料科学
水溶液
氮化物
化学工程
退火(玻璃)
最大相位
化学稳定性
热稳定性
纳米材料
碳化物
过渡金属
纳米技术
复合材料
图层(电子)
化学
物理化学
有机化学
催化作用
工程类
作者
Xiaofei Zhao,Dustin E. Holta,Zeyi Tan,Ju-Hyun Oh,Ian J. Echols,Muhammad Anas,Huaixuan Cao,Jodie L. Lutkenhaus,Miladin Radović,Micah J. Green
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2020-11-10
卷期号:3 (11): 10578-10585
被引量:59
标识
DOI:10.1021/acsanm.0c02473
摘要
Two-dimensional transition metal carbide and nitride nanomaterials, known as MXenes, exhibit low chemical stability in aqueous environments; they tend to oxidize and react with water molecules, resulting in structural degradation and decreased electrical conductivity. This significantly limits their storage lifetime and potential use in the presence of water, particularly in nanosheet-assembled films for battery electrodes and functional coatings. Here we demonstrate that thermal annealing of Ti3C2Tz films at elevated temperatures (∼600 °C) causes changes in the termination distribution as well as the formation of a protective layer of TiO2 on the outermost layer of films. The induced chemical and structural changes during thermal treatment arrest MXene oxidation and enable the MXene films to be stable in aqueous solutions for over 10 months.
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