文献类型：期刊文献

英文题名：Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis

作者：Lv, Yinzhi[1];Chang, Kaikai[2];Wu, Hui[1];Fang, Ping[1];Chen, Chaogui[1];Liao, Qing[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Yigao Testing Technol Co Ltd, Shaoxing 312000, Zhejiang, Peoples R China

年份：2021

卷号：84

期号：9

起止页码：2446

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000701971200001)、、EI(收录号：20214911277938)、Scopus(收录号：2-s2.0-85120417893)、WOS

基金：We gratefully acknowledge the funding from Scientific Research Fund (no. 20175003, 2015LG1004) in Shaoxing University. We also sincerely thank the young and middle aged academic cadres from Shaoxing University.

语种：英文

外文关键词：adsorption; Cr(VI); heavy metals; Ti3C2Tx; two-dimensional

外文摘要：In this study, two-dimensional (2D) MXene material (Ti3C2Tx) was employed to investigate its potentials toward the Cr(VI) removal in aqueous system by batch experiments. Characterization techniques such as SEM-EDS, HRTEM, XRD, FI-TR and XPS were used to analyze the structure and interaction of Ti3C2Tx before and after Cr(VI) adsorption. The results indicated that layered structure of Ti3C2Tx had unique surface functional properties and abundant active sites, such as -OH, Ti-O, C = O, which exhibited high adsorption capacity for the Cr(VI) removal. The Cr(VI) adsorption capacity by Ti3C2Tx decreased with the increase of pH, and its maximum value can reach 169.8 mg/g at pH = 2.0. The adsorption kinetic was well-explained by a pseudo-second-order kinetic, indicating that chemical interaction played a dominant role in the adsorption of Cr(VI) on Ti3C2Tx. Meanwhile, the isotherm data was calculated to conform the Freundlich isotherm model. Thermodynamic analysis indicated that the adsorption process of Cr(VI) on Ti3C2Tx was a spontaneous endothermic process. These experimental results revealed that Ti3C2Tx had tremendous potential in heavy metals adsorption from aqueous solutions.