文献类型：期刊文献

英文题名：Incorporating bimetal oxide MnFe2O4 onto covalent organic frameworks for the removal of UO22+ ion from aqueous solution

作者：Zhong, Xin[1];Lu, Zhipeng[1];Liang, Wen[1];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

年份：2021

卷号：556

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000734412800001)、、WOS

基金：Financial support from the Research Fund Program of National Natural Science Foundation of China (No. 21876115) , the Key Research Program of Shaoxing University (2019LG1003) , and Scientific Research Start-up Fund of Shaoxing University (20195007) .

语种：英文

外文关键词：MnFe2O4; COFs; TpPa-1; UO22+; Adsorption; Reduction

外文摘要：Nanocomposite (MnFe2O4@TpPa-1, named as MFTP) adsorbent was developed by one-pot solvothermal method, using beta-ketoenamine linked covalent organic frameworks (COFs, TpPa-1) as a supporting material to alleviate the aggregation of MnFe2O4. The properties were characterized by XRD, SEM, FT-IR, HRTEM, XPS, pH(pzc), and others. The pseudo-second-order and Langmuir model were better description the adsorption process, and the maximum UO22+ ion adsorption capacity of MFTP (1235.01 mg/g) was much larger than that of MnFe2O4 (212.1 mg/g). The adsorption mechanism was complicated, including surface adsorption, oxidation, and reduction reaction. With the aid of XPS and the first-principle calculations, conformed that transition metal ion ( Mn(II)) species and oxygen/nitrogen-containing groups participated in adsorption process. The experimental results shown that porous MFTP nanocomposite could be used as an effective and reusable adsorbent to remove/recover UO22+ ion from wastewater or seawater.