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Annealed Ti3C2Tz MXene Films for Oxidation-Resistant Functional Coatings
ACS Applied Nano Materials ( IF 5.9 ) Pub Date : 2020-11-10 , DOI: 10.1021/acsanm.0c02473
Xiaofei Zhao 1 , Dustin E. Holta 2 , Zeyi Tan 2 , Ju-Hyun Oh 1 , Ian J. Echols 1 , Muhammad Anas 1 , Huaixuan Cao 1 , Jodie L. Lutkenhaus 1, 2 , Miladin Radovic 2 , Micah J. Green 1, 2
Affiliation  

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.

中文翻译:

用于抗氧化功能涂层的Ti 3 C 2 T z MXene退火薄膜

二维过渡金属碳化物和氮化物纳米材料,称为MXenes,在水性环境中表现出较低的化学稳定性;它们往往会氧化并与水分子反应,从而导致结构退化和电导率降低。这极大地限制了它们的储存寿命以及在水的存在下的潜在用途,特别是在用于电池电极和功能涂层的纳米片组装膜中。在这里,我们证明了Ti 3 C 2 T z薄膜在高温(约600°C)下的热退火会导致终止分布的变化以及TiO 2保护层的形成在薄膜的最外层。热处理过程中引起的化学和结构变化阻止了MXene氧化,并使MXene膜在水溶液中稳定超过10个月。
更新日期:2020-11-25
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