Insight into Adsorption Performance and Mechanism on Efficient Removal of Methylene Blue by Accordion-like V2CTx MXene

Huan Lei; Zongdi Hao; Ke Chen; Youhu Chen; Jianning Zhang; Zhengjie Hu; Yujie Song; Pinhua Rao; Qing Huang

doi:10.1021/acs.jpclett.0c00973

Insight into Adsorption Performance and Mechanism on Efficient Removal of Methylene Blue by Accordion-like V₂CT_x MXene

J Phys Chem Lett. 2020 Jun 4;11(11):4253-4260. doi: 10.1021/acs.jpclett.0c00973. Epub 2020 May 13.

Authors

Huan Lei¹, Zongdi Hao¹, Ke Chen^{2

3}, Youhu Chen², Jianning Zhang², Zhengjie Hu¹, Yujie Song², Pinhua Rao¹, Qing Huang^{2

3}

Affiliations

¹ School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
² Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
³ Qianwan Institute of CNiTECH, Ningbo 315336, China.

PMID: 32374607
DOI: 10.1021/acs.jpclett.0c00973

Abstract

Dye-bearing wastewaters leading to the water pollution and ecological upset is a crucial issue in the textile industry. Herein, we report a facile method using two-dimensional transition metal carbides (MXenes) for the removal of the methylene blue (MB) in the water. The accordion-like V₂CT_x MXene is originally demonstrated to have high and spontaneous adsorption capacity of MB at 111.11 mg·g^-1, thrice over that of Ti₃C₂T_x as previously reported. The wide lamellar space of V₂CT_x is certain to have large accommodation for MB. The electrostatic interaction effect and hydrogen bond between V₂CT_x and MB not only promote the efficient adsorption process but also provide the selectivity between anionic and cationic dyes. Combined with good reusability, we anticipate that the V₂CT_x MXene is a promising candidate for the removal of cationic dyes from textile-dye-bearing wastewaters.