文献类型：期刊文献

英文题名：Defect creation in metal-organic frameworks for rapid and controllable decontamination of roxarsone from aqueous solution

作者：Li, Bing[1];Zhu, Xiangyang[1];Hu, Kaili[2];Li, Yongsheng[1];Feng, Jianfang[2];Shi, Jianlin[1];Gu, Jinlou[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Shanghai Univ Tradit Chinese Med, Murad Res Ctr Modernized Chinese Med, Shanghai 201203, Peoples R China

年份：2016

卷号：302

起止页码：57

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20154101352488);WOS:【SCI-EXPANDED(收录号:WOS:000366225300007)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51072053, 51372084), the Innovation Program of Shanghai Municipal Education Commission (13zz040), the Nano-Special Foundation for Shanghai Committee of Science and Technology (12nm0502600) and the 111 Project (B14018).

语种：英文

外文关键词：Metal-organic frameworks; Defect-tunable UiO-66; Organic arsenic compounds; Decontamination; Wastewater treatment

摘要：Given the great harm to the human health of organic arsenic compounds (OACs), developing highly efficient adsorbents with both rapid adsorption rate and high saturation capacity is paramount important. Herein, Zr-based metal-organic frameworks (MOF5) of UiO-66 have been successfully exploited for the efficient decontamination of a typical organic arsenic compound of roxarsone (ROX) from aqueous solution. The influences of the most significant parameters such as contact time, adsorbate concentration, pH as well as ionic strength on the adsorption of ROX were investigated. The amount of missing-linker defects in UiO-66 was systematically tuned by changing the concentration of modulator in the reactants. The presence of the defects not only resulted in the dramatically enhanced porosity, but also induced the creation of Zr-OH groups which served as the main active adsorption sites for efficient ROX sequestration. As a result, adsorptive capacity of ROX over UiO-66 could be improved to 730 mg/g, which was much higher than those of many reported adsorbents. Meanwhile, the adsorption equilibrium time could be reduced to as short as 30 min. These merits, combined with their excellent stability, prefigure the great potentials of these defect-tunable UiO-66 MOFs as adsorbents for the efficient removal of various OACs from the polluted water. (C) 2015 Elsevier B.V. All rights reserved.