文献类型：期刊文献

英文题名：Macroscopic and spectroscopic insights into the mutual interaction of graphene oxide, Cu(II), and Mg/Al layered double hydroxides

作者：Hu, Baowei[1,2];Huang, Chengcai[1,2];Li, Xue[6];Sheng, Guodong[1,2,4];Li, Hui[1,2];Ren, Xuemei[7];Ma, Jingyuan[5];Wang, Jin[3];Huang, Yuying[5]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Coll Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Coll Med Sci, Shaoxing 312000, Zhejiang, Peoples R China;[3]Guangzhou Univ, Coll Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China;[4]North China Elect Power Univ, Sch Environm & Chem Engn, Beijing 102206, Peoples R China;[5]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;[6]Shaoxing Univ, Coll Yuanpei, Shaoxing 312000, Peoples R China;[7]Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China

年份：2017

卷号：313

起止页码：527

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000394723200053)、、EI(收录号：20170103217214)、Scopus(收录号：2-s2.0-85007524701)、WOS

基金：Financial supports from the Natural Science Foundation of Zhejiang Province (LY15B070001), Natural Science Foundation of China (21577093, 21207092, and 41303007), the Guangdong Provincial Natural Science Foundation (2015A030313512) are greatly acknowledged. The authors thank beamline BL14W1 (Shanghai Synchrotron Radiation Facility) for providing the beam time.

语种：英文

外文关键词：Graphene oxide; Layered double hydroxides; Cu(II); Mutual interaction

外文摘要：The environmental behavior and impact of graphene oxide (GO) has recently received considerable attention due to its rapid production and wide applications, and thus its inevitable release into the natural ecosystem, wherein heavy metals and mineral particles are generally co-existed. This work was firstly aimed to identify the mutual effect of Cu(II) and GO interaction with Mg/Al layered double hydroxides (LDH). The results demonstrate that Cu(II) and GO exhibited interactively enhancement roles in their co-adsorption on LDH. Namely, enhanced co-adsorption of GO with Cu(II) was mainly ascribed from formation of "LDH-Cu(II)-GO" ternary surface complexes via cation-in interaction. Meanwhile, increased co adsorption of Cu(II) with GO was primarily derived from formation of "LDH-GO-Cu(II)" ternary surface complexes through interaction of Cu(II) with O-bearing groups on adsorbed GO (i.e., GO-bridging). EXAFS analysis indicates that GO could significantly inhibit formation of outer-sphere complexes for Cu(II) at low pH, while suppress formation of surface precipitates at high pH. Increased uptake of GO and Cu(II) on minerals as they co-exist may decrease their mobility. These new insights provide additional details to be considered concerning the fate and risk of GO in real ecosystem, as well as the natural purification of metals in ecological environments. (C) 2016 Elsevier B.V. All rights reserved.