One-pot synthesis of magnetic graphene oxide composites as an efficient and recoverable adsorbent for Cd(II) and Pb(II) removal from aqueous solution
One-pot synthesis of magnetic graphene oxide composites as an efficient and recoverable adsorbent for Cd(II) and Pb(II) removal from aqueous solution
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一锅合成磁性氧化石墨烯复合材料作为一种高效且可回收的吸附剂，用于从水溶液中去除 Cd(II) 和 Pb(II)
DOI：
10.1016/j.jhazmat.2019.120914
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发表时间：
2020-01-05
影响因子：
13.6
通讯作者：
Sun, Yinyong
中科院分区：
文献类型：
--
作者：
Bao, Shuangyou;Yang, Weiwei;Sun, Yinyong
开发一种简单的合成方法来直接制备可重复使用且长期稳定的磁性氧化石墨烯（GO）吸附剂是非常需要的，但也是具有挑战性的。本文报道了一种用n-丙基三甲氧基硅烷（NPTS）作为交联剂连接Fe3O4/SiO2与氧化石墨烯制备磁性氧化石墨烯去除重金属离子的新方法。制备的磁性氧化石墨烯可以通过永磁体快速从其水溶液中分离出来，并且对Cd（II）和Pb（II）具有优异的吸附性能，在中性条件下对Cd（II）和Pb（II）的最大吸附量分别为128.2和385.1 mg/g。其他离子Na(I)和K(I)的存在对Cd（II）和Pb（II）的去除率影响不大。此外，制备的Fe3O4/SiO2-GO吸附剂可循环使用，具有良好的重现性。因此，磁性氧化石墨烯吸附剂是去除重金属离子的有效材料，为水的净化提供了新的平台。
It is extremely desirable but challenging to develop a facile synthesis method to directly prepare reusable and longtime stable magnetic graphene oxide (GO) adsorbent. Here, a new approach to prepare a magnetic GO for removing the heavy metal ions is reported by using n-Propyltrimethoxysilane (NPTS) as a cross-coupling agent to connect Fe3O4/SiO2 and GO. The as-prepared magnetic GO can be separated quickly from their aqueous solution by the permanent magnet and also exhibited excellent adsorption performance for Cd(II) and Pb(II) with maximum adsorption capacities for Cd(II) and Pb(II) to 128.2 and 385.1 mg/g under neutral conditions, respectively. The presence of other ions such as Na(I) and K(I), had little influence on the Cd(II) and Pb(II) removal efficiency. Moreover, the as-prepared Fe3O4/SiO2-GO adsorbents can be recycled and exhibited good reproducibility. Thus, the magnetic GO adsorbents are effective materials for the removal of heavy metal ions and thus could offer a new platform for water cleanup.