| Synthesis of amidoxime-decorated 3D cubic mesoporous silica via self-assembly co-condensation as a superior uranium(VI) adsorbent | |
Xiao, Jiang; Jing, Yan ; Yao, Ying; Wang, Xingquan; Jia, Yongzhong
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| 2019-03-01 | |
| 发表期刊 | JOURNAL OF MOLECULAR LIQUIDS
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| ISSN | 0167-7322 |
| 卷号 | 277页码:843-855 |
| 摘要 | In the present study, amidoxime hybrid mesoporous silicas (denoted KIT-6-AO samples) were synthesized via co-condensation of tetraethoxysilane (TEOS) with 2-cyanoethyltriethoxysilane (CPTES) and then reduced in a hydroxylamine hydrochloride solution. The adsorbents were characterized using SAXRD, SEM, TEM, N-2 adsorption-desorption isotherms, FT-IR, elemental analysis, and Zeta potential test. Batch experiments were conducted to investigate the adsorption of U(VI) in KIT-6-AO samples. Experimental data indicates that the amidoxime-functionalized KIT-6-AO-20% shows the best adsorption performance, and the maximum monolayer U(VI) sorption capacity was calculated to be 323.94 mg.g(-1) at 298 K and pH = 5.0 with the Langmuir model. Adsorption equilibrium was reached within 45 min in KIT-6-AO-20% sample. The sorption behavior of U(VI) on KIT-6 and KIT-6-AO-20% were strongly dependent on pH and independent of ionic strength. In addition, sorption kinetic and thermodynamic results suggest that the sorption reaction was a spontaneous, endothermic, and chemical process. Furthermore, the U(VI) adsorption mechanism on amidoxime groups was also investigated using XPS and FT-IR analysis. We found that the entanglement of electrons of the N atom in -C=NOH and/or -C-NH2 and the O atoms in C=NOH coordinated with U(VI) to form strong complexes. Overall, the synthesized KIT-6-AO samples could be used as effective materials for removal U(VI) from aqueous solutions. (C) 2019 Elsevier B.V. All rights reserved. |
| DOI | 10.1016/j.molliq.2019.01.009 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.isl.ac.cn/handle/363002/34056 |
| 专题 | 盐湖资源综合利用工程技术中心 中国科学院青海盐湖研究所 |
| 推荐引用方式 GB/T 7714 | Xiao, Jiang,Jing, Yan,Yao, Ying,et al. Synthesis of amidoxime-decorated 3D cubic mesoporous silica via self-assembly co-condensation as a superior uranium(VI) adsorbent[J]. JOURNAL OF MOLECULAR LIQUIDS,2019,277:843-855. |
| APA | Xiao, Jiang,Jing, Yan,Yao, Ying,Wang, Xingquan,&Jia, Yongzhong.(2019).Synthesis of amidoxime-decorated 3D cubic mesoporous silica via self-assembly co-condensation as a superior uranium(VI) adsorbent.JOURNAL OF MOLECULAR LIQUIDS,277,843-855. |
| MLA | Xiao, Jiang,et al."Synthesis of amidoxime-decorated 3D cubic mesoporous silica via self-assembly co-condensation as a superior uranium(VI) adsorbent".JOURNAL OF MOLECULAR LIQUIDS 277(2019):843-855. |
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| Synthesis of amidoxi（12958KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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