Effect of Fe3O4@PDA morphology on the U(VI) entrapment from aqueous solution | |
Duan, Shengxia2,4; Xu, Xuetao4; Liu, Xia2,4; Sun, Ju2,4; Hayat, Tasawar1; Alsaedi, Ahmed1; Li, Jiaxing1,2,3 | |
刊名 | APPLIED SURFACE SCIENCE
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2018-08-01 | |
卷号 | 448期号:无页码:297-308 |
关键词 | Fe3O4@PDA spheres Polydopamine In situ polymerization U(VI) Adsorption |
ISSN号 | 0169-4332 |
DOI | 10.1016/j.apsusc.2018.04.131 |
英文摘要 | In this work, two kinds of core-shell Fe3O4@PDA materials with different morphologies were successfully prepared by a simple in situ polymerization method based on two kinds of pristine Fe3O4 spheres, which were obtained by hydrothermal method. Among the four obtained samples, Fe3O4@PDA porous nanospheres (MNS-4) have the best U(VI) entrapment performance, which can not only be owing to the structure characteristics (higher porosity and lower density) but also to the PDA shell with large amount of functional groups. Additionally, the maximum removal capacity of MNS-4 for U(VI) entrapment can be of 193.27 mg.g (1) at 298 K, which exceeds the adsorption capacity of most other reported magnetic materials. Moreover, the solution pH values have a significant effect on the adsorption performance of the adsorbents for U(VI) pre-concentration while that originated from ionic strength can be negligible, suggesting that the adsorption process can be achieved through inner-sphere surface complexation. Thermodynamic studies reveal that the U(VI) adsorption process is exothermic and spontaneous. The analysis of adsorption mechanism indicates that U(VI) pre-concentration process can be achieved by the interactions between -OH groups, pyridinic N and C-NH2 and U(VI). This work not only offers a new point of synthesizing undertaking adsorbents with targeting structures, but also provides a facile and versatile approach towards designing Fe3O4-based hybrid materials for their potential environmental applications. (C) 2018 Elsevier B.V. All rights reserved. |
资助项目 | National Natural Science Foundation of China[21677146] ; Jiangsu Provincial Key laboratory of Radiation Medicine and Protection ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; National Natural Science Foundation of China[21707043] |
WOS关键词 | MAGNETIC FE3O4 NANOPARTICLES ; CARBON NANOTUBES ; GRAPHENE OXIDE ; FUNCTIONALIZED SBA-15 ; EFFICIENT ENRICHMENT ; IRON NANOPARTICLES ; SELECTIVE REMOVAL ; DRINKING-WATER ; URANIUM IONS ; VI SORPTION |
WOS研究方向 | Chemistry ; Materials Science ; Physics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000432797100035 |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/36522] ![]() |
专题 | 合肥物质科学研究院_中科院等离子体物理研究所 |
通讯作者 | Li, Jiaxing |
作者单位 | 1.King Abdulaziz Univ, Fac Sci, Jeddah 21589, Saudi Arabia 2.Chinese Acad Sci, Inst Plasma Phys, CAS Key Lab Photovolta & Energy Conservat Mat, POB 1126, Hefei 230031, Anhui, Peoples R China 3.Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou, Peoples R China 4.Wuyi Univ, Sch Chem & Environm Engn, Jiangmen 529020, Peoples R China |
推荐引用方式 GB/T 7714 | Duan, Shengxia,Xu, Xuetao,Liu, Xia,et al. Effect of Fe3O4@PDA morphology on the U(VI) entrapment from aqueous solution[J]. APPLIED SURFACE SCIENCE,2018,448(无):297-308. |
APA | Duan, Shengxia.,Xu, Xuetao.,Liu, Xia.,Sun, Ju.,Hayat, Tasawar.,...&Li, Jiaxing.(2018).Effect of Fe3O4@PDA morphology on the U(VI) entrapment from aqueous solution.APPLIED SURFACE SCIENCE,448(无),297-308. |
MLA | Duan, Shengxia,et al."Effect of Fe3O4@PDA morphology on the U(VI) entrapment from aqueous solution".APPLIED SURFACE SCIENCE 448.无(2018):297-308. |
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