Effective removal of U(VI) and Eu(III) by carboxyl functionalized MXene nanosheets

doi:10.1016/j.jhazmat.2020.122731

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Effective removal of U(VI) and Eu(III) by carboxyl functionalized MXene nanosheets
	Zhang, Pengcheng ; Wang, Lin ; Du, Ke ; Wang, Siyi ; Huang, Zhiwei ; Yuan, Liyong ; Li, Zijie ; Wang, Hongqing ; Zheng, Lirong ; Chai, Zhifang
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020
卷号	396
关键词	AQUEOUS-SOLUTION EFFICIENT REMOVAL TITANIUM CARBIDE HUMIC-ACID GRAPHENE ADSORPTION URANIUM SORPTION TH(IV) EXAFS
DOI	10.1016/j.jhazmat.2020.122731
英文摘要	With the development of nuclear power, the negative environmental impact such as radioactive pollution has become an urgent issue to impede the utilization of nuclear energy. The construction of promising organicinorganic hybrid materials is considered as an effective strategy for environmental remediation of radioactive contamination. In this work, two-dimensional transition metal carbide (MXene), an emerging inorganic layered material, has been successfully modified by carboxyl terminated aryl diazonium salt to both enhance its chelating ability to radionuclides and improve its water stability. The carboxyl functionalized Ti3C2Tx MXene (TCCH) shows excellent removal ability for U(VI) and Eu(III), evidenced by ultrafast adsorption kinetics (3 min), high maximum adsorption capacities (344.8 mg/g for U and 97.1 mg/g for Eu) and high removal percentage of radionuclides from artificial groundwater (> 90%). The adsorption of U(VI) and Eu(III) on TCCH are in good accord with the Langmuir adsorption isotherm model and the pseudo-second-order kinetic model. Ionic strength experiments, X-ray photoelectron spectroscopy (XPS) and Extended X-ray absorption fine structure (EXAFS) analyses were conducted to assess the detailed adsorption mechanism. The results reveal that the adsorption of U (VI) on TCCH follows an inner-sphere configuration, whereas the adsorption of Eu(III) is determined by both inner-sphere complexation and electrostatic interaction.
学科主题	Engineering ; Environmental Sciences & Ecology
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20515]
专题	2020专题
作者单位	1.Wang, HQ (corresponding author), Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China. 2.Wang, L 3.Shi, WQ (corresponding author), Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, Pengcheng,Wang, Lin,Du, Ke,et al. Effective removal of U(VI) and Eu(III) by carboxyl functionalized MXene nanosheets[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,396.
APA	Zhang, Pengcheng.,Wang, Lin.,Du, Ke.,Wang, Siyi.,Huang, Zhiwei.,...&Shi, Weiqun.(2020).Effective removal of U(VI) and Eu(III) by carboxyl functionalized MXene nanosheets.JOURNAL OF HAZARDOUS MATERIALS,396.
MLA	Zhang, Pengcheng,et al."Effective removal of U(VI) and Eu(III) by carboxyl functionalized MXene nanosheets".JOURNAL OF HAZARDOUS MATERIALS 396(2020).