A hydrothermal etching route to synthesis of 2D MXene (Ti3C2, Nb2C): Enhanced exfoliation and improved adsorption performance

被引:342
|
作者
Peng, Chao [1 ,2 ]
Wei, Ping [2 ]
Chen, Xin [1 ]
Zhang, Yongli [1 ,2 ]
Zhu, Feng [1 ,2 ]
Cao, Yonghai [2 ]
Wang, Hongjuan [2 ]
Yu, Hao [2 ]
Peng, Feng [3 ]
机构
[1] Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Peoples R China
[2] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
[3] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou 510006, Guangdong, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
MXene; Ti3C2; Nb2C; Hydrothermal etching; Dye adsorption; 2-DIMENSIONAL TITANIUM CARBIDE; TRANSITION-METAL CARBIDES; THERMAL-STABILITY; DYE ADSORPTION; DELAMINATION; ELECTRODES;
D O I
10.1016/j.ceramint.2018.07.124
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
2D MXenes have attracted extensive attentions owing to their anisotropy, high conductivity and other extraordinary properties. The popular preparation method of MXenes usually involves HF in high concentrations, which has seriously restricted their pervasive applications. In this work, a new hydrothermal route with low-toxicity etching agents (NaBF4, HCl) was used to synthesize Ti3C2 MXene (h-Ti3C2). Compared with the Ti3C2 prepared by the traditional HF etching method (t-Ti3C2), the h-Ti3C2 has the higher c lattice parameter, larger interlayer distance and larger BET specific surface- area, because of- the slow release mechanism during the hydrothermal process. The hydrothermal etching method not only avoided the use of high-concentration HF, but also was more efficient to prepare Ti3C2 flakes. Moreover, the hydrothermal etching route can be extended to other MXene materials, e.g. Nb2C. We demonstrated that the h-MXenes have better adsorption performance of methylene blue and methyl orange dyes. The hydrothermal etching route proposed in this study enabled the environmental benign and high efficiency exfoliation of MXenes, displaying the promise to facilely prepare 2D MXenes and paving a way to their widespread applications.
引用
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页码:18886 / 18893
页数:8
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