文献类型：期刊文献

英文题名：Efficient enrichment of U(VI) by two-dimensional layered transition metal carbide composite

作者：Zhou, Yun[1,2,3];Hao, Huai-Xin[2,3];Dong, Tian-Hao[1,2,3];Ni, Xu-Feng[1,2,3];Hu, Yi-Chen[2,3];Ma, Jia-Ju[1,2,3];Yang, Jun-Qiang[1,2,3];Shi, Ke-Liang[1,2,3];Duan, Guo-Jian[4];Liu, Tong-Huan[1,2,3]

第一作者：Zhou, Yun

通信作者：Liu, TH[1];Liu, TH[2];Liu, TH[3]

机构：[1]Lanzhou Univ, Frontier Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China;[2]Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China;[3]Lanzhou Univ, Key Lab Special Funct Mat & Struct Design, Minist Educ, Lanzhou 730000, Peoples R China;[4]Gansu Univ Chinese Med, Lanzhou 730000, Peoples R China

第一机构：Lanzhou Univ, Frontier Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China

通信机构：[1]corresponding author), Lanzhou Univ, Frontier Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China;[2]corresponding author), Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China;[3]corresponding author), Lanzhou Univ, Key Lab Special Funct Mat & Struct Design, Minist Educ, Lanzhou 730000, Peoples R China.

年份：2022

卷号：110

期号：5

起止页码：311

外文期刊名：RADIOCHIMICA ACTA

收录：;Scopus(收录号：2-s2.0-85129789659);WOS:【SCI-EXPANDED(收录号:WOS:000788842400001)】；

基金：This research was funded by the National Natural Science Foundation of China (No. 21762001 and 22061132004), Fundamental Research Funds for the Central Universities (lzujbky-2021-kb06) and Science and Technology Projects of Gansu Province (21JR1RA265) Gansu University of Chinese Medicine Postgraduate Innovation Fund Projects (2021CX43) [1].

语种：英文

外文关键词：adsorption; amidoximation; mechanism; PAO; Ti3C2Tx; uranium (VI)

摘要：With the rapid development of nuclear energy, how to safely and efficiently dispose of radioactive waste solution has become an urgent environmental problem of public concern. It is of great significance to construct a new type of high-efficiency adsorbent material to recover uranium from nuclear waste solution. In this work, the Ti3C2Tx material (an emerging two-dimensional inorganic layered material) with a stable layered structure was used as the matrix, and the amidoxime functionalized MXene composite material (PAO/Ti3C2Tx) was synthesized by in-situ polymerization. The amidoxime-functionalized Ti3C2Tx showed excellent capacity to capture U(VI), with a maximum adsorption capacity of 98.04 mg/g at 25 degrees C, which was significantly better than that of Ti3C2Tx, and the adsorption selectivity for U(VI) was greatly improved. The adsorption was conformed to Langmuir isotherm model and pseudo-second-order kinetic model. In addition, the adsorbed UO22+ could be effectively desorbed by 0.1 M HNO3, and the adsorption performance of PAO/Ti3C2Tx did not decrease significantly after 5 adsorption/desorption cycles. The results of ionic strength experiment, FT-IR, SEM, and XPS jointly indicated that adsorption mechanism of U(VI) on PAO/Ti3C2Tx was the combined effect of the amidoxime group and -O and -OH active groups on the surface of Ti3C2Tx, mainly inner complexation. These advantages make PAO/Ti3C2Tx composite a highly potential U(VI) adsorbent with great application prospects.