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

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 Ti3C2...

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Autores principales:	Yinzhi Lv, Kaikai Chang, Hui Wu, Ping Fang, Chaogui Chen, Qing Liao
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption cr(vi) heavy metals ti3c2tx two-dimensional Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/3c97b28155ac41fea9afccb0ce6b7d63
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spelling	oai:doaj.org-article:3c97b28155ac41fea9afccb0ce6b7d632021-11-23T18:41:01ZHighly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis0273-12231996-973210.2166/wst.2021.434https://doaj.org/article/3c97b28155ac41fea9afccb0ce6b7d632021-11-01T00:00:00Zhttp://wst.iwaponline.com/content/84/9/2446https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In 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 the 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 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 to 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. HIGHLIGHTS Novel Two-dimensional titanium carbide nanosheets (Ti3C2Tx MXene) were employed for Cr(VI) scavenging.; Ti3C2Tx MXene exhibited high adsorption ability for the Cr(VI) removal, namely 169.8 mg/g at pH = 2.0.; The adsorption of Cr(VI) on Ti3C2Tx MXene is a multilayer adsorption and spontaneous endothermic process.; The chemical interaction played a dominant role in the Cr(VI) removal by Ti3C2Tx MXene.;Yinzhi LvKaikai ChangHui WuPing FangChaogui ChenQing LiaoIWA Publishingarticleadsorptioncr(vi)heavy metalsti3c2txtwo-dimensionalEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 9, Pp 2446-2456 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption cr(vi) heavy metals ti3c2tx two-dimensional Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption cr(vi) heavy metals ti3c2tx two-dimensional Environmental technology. Sanitary engineering TD1-1066 Yinzhi Lv Kaikai Chang Hui Wu Ping Fang Chaogui Chen Qing Liao Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
description	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 the 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 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 to 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. HIGHLIGHTS Novel Two-dimensional titanium carbide nanosheets (Ti3C2Tx MXene) were employed for Cr(VI) scavenging.; Ti3C2Tx MXene exhibited high adsorption ability for the Cr(VI) removal, namely 169.8 mg/g at pH = 2.0.; The adsorption of Cr(VI) on Ti3C2Tx MXene is a multilayer adsorption and spontaneous endothermic process.; The chemical interaction played a dominant role in the Cr(VI) removal by Ti3C2Tx MXene.;
format	article
author	Yinzhi Lv Kaikai Chang Hui Wu Ping Fang Chaogui Chen Qing Liao
author_facet	Yinzhi Lv Kaikai Chang Hui Wu Ping Fang Chaogui Chen Qing Liao
author_sort	Yinzhi Lv
title	Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
title_short	Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
title_full	Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
title_fullStr	Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
title_full_unstemmed	Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
title_sort	highly efficient scavenging of cr(vi) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/3c97b28155ac41fea9afccb0ce6b7d63
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Highly efficient scavenging of Cr(VI) by two-dimensional titanium carbide nanosheets: kinetics, isotherms and thermodynamics analysis

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