Ultra-fast and ultra-efficient removal of Cr (VI) by the aqueous solutions of monolayer MXene (Ti3C2Tx)

doi:10.1016/j.chemosphere.2022.136573

	Ultra-fast and ultra-efficient removal of Cr (VI) by the aqueous solutions of monolayer MXene (Ti3C2Tx)
	Wang, Hongwei 1; Wu, Fang 1; Wang, Zhiheng 1; Wang, Yang 1; Zhang, Shufang2 ; Luo, Haijun 3; Zheng, Zhiqin 4,5; Fang, Liang 1,6
	2022-12-01
发表期刊	CHEMOSPHERE
ISSN	0045-6535
EISSN	1879-1298
卷号	308
摘要	Chromium (VI) removal is crucial to the safety of water resources, but there is still a lack of effective and fast dislodge methods, especially the on-site rapid remediation and emergency removal technology. Herein, the monolayer (ML) Ti3C2Tx nanosheets (NSs) were prepared to remove Cr (VI) from water. The solution sample of the two-dimensional (2D) Ti3C2Tx NSs demonstrate ultrafast adsorption kinetics (the concentration decreasing from 300 to 3 mg L−1 in 10 min) and impressively high capacity (1483 mg g−1), which is several times higher than that of the most reported Cr (VI) adsorption by Ti3C2Tx. The analysis of the adsorption kinetics and isotherm models indicates that the adsorption reaction is endothermic, with physical and chemical adsorption coexisting (mainly monolayer chemical adsorption). The joint study of the experimental analysis and theoretical calculation based on the density functional theory (DFT) demonstrates that the extraordinary removal performance of Cr (VI) is due to the synergetic effect of reduction reaction removal and electrostatic adsorption. It is found that the Cr (VI) is mainly reduced by the OH- terminals on Ti3C2, and the detoxified Cr (III) is anchored on the surface of Ti3C2Tx through complexation reaction with O terminal. The advantages of ultrafast adsorption kinetics and extra-high adsorption capacity of the single-layered Ti3C2Tx for Cr (VI) removal make it a remarkable candidate for rapid and urgent removal of Cr (VI) wastewater. © 2022 Elsevier Ltd
关键词	Adsorption Chemical analysis Chemicals removal (water treatment) Chromium compounds Complexation Electrostatics Kinetics Monolayers Reaction kinetics Titanium compounds % reductions Adsorption kinetics Chemical adsorption Chromium (VI) Chromium VI Density-functional-theory Electrostatic adsorption Reduction removal Ti3C2Tx Ultra-fast
DOI	10.1016/j.chemosphere.2022.136573
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000868132000001
出版者	Elsevier Ltd
EI入藏号	20224012822790
原始文献类型	Journal article (JA)
出版地	OXFORD
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.cqcet.edu.cn/handle/39TD4454/14163
专题	人工智能与大数据学院
作者单位	1.State Key Laboratory of Power Transmission Equipment & System Safety and New Technology, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing; 400044, China; 2.College of Software, Chongqing College of Electronic Engineering, Chongqing; 401331, China; 3.Key Laboratory on Optoelectronic Functional Materials, College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing; 401331, China; 4.Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Sichuan Province, Mianyang; 621010, China; 5.NHC Key Laboratory of Nuclear Technology Medical Transformation (MianYang Central Hospital), China; 6.Center of Modern Physics, Institute for Smart City of Chongqing University in Liyang, Jiangsu Province, Liyang; 213300, China
推荐引用方式 GB/T 7714	Wang, Hongwei,Wu, Fang,Wang, Zhiheng,et al. Ultra-fast and ultra-efficient removal of Cr (VI) by the aqueous solutions of monolayer MXene (Ti3C2Tx)[J]. CHEMOSPHERE,2022,308.
APA	Wang, Hongwei.,Wu, Fang.,Wang, Zhiheng.,Wang, Yang.,Zhang, Shufang.,...&Fang, Liang.(2022).Ultra-fast and ultra-efficient removal of Cr (VI) by the aqueous solutions of monolayer MXene (Ti3C2Tx).CHEMOSPHERE,308.
MLA	Wang, Hongwei,et al."Ultra-fast and ultra-efficient removal of Cr (VI) by the aqueous solutions of monolayer MXene (Ti3C2Tx)".CHEMOSPHERE 308(2022).