One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI)
文献类型：期刊论文
| 作者 | Linghu, WS; Yang, H; Sun, YX; Sheng, GD; Huang, YY |
| 刊名 | ACS SUSTAINABLE CHEMISTRY & ENGINEERING
 |
| 出版日期 | 2017 |
| 卷号 | 5期号:6页码:5608-5616 |
| 关键词 | Graphene Oxide Nanosheets Layered Double Hydroxides Multiwalled Carbon Nanotubes Nanoscale Zerovalent Iron Modeling Techniques Enhanced Adsorption Efficient Removal Aqueous-solutions Theoretical Calculations Competitive Sorption |
| ISSN号 | 2168-0485 |
| DOI | 10.1021/acssuschemeng.7b01303 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The removal mechanism of U(VI) on Mg-Al-layered double hydroxide-supported graphene oxide (LDH/GO) composites was investigated by batch, spectroscopic, and surface complexation modeling. The batch experiments showed that the enhanced removal of U(VI) on LDH and LDH/GO composites in the presence of carbonate was observed at pH < 5.0, whereas the presence of carbonate significantly inhibited U(VI) removal at pH starting from 7.0 to 9.0. It is demonstrated that the oxygenated functional groups (i.e., -OH) were responsible for the high effective removal of U(VI) by XPS analysis. The results of XANES and EXAFS spectra indicated that adsorption of U(VI) on LDH/GO composites was inner-sphere surface complexation. According to surface complexation modeling, the removal of U(VI) on LDH/GO composites can be satisfactorily fitted by a diffuse layer model with an ion exchange (X2UO2) and two inner-sphere surface complexes (SOUO2+ and SOUO2(CO3)(2)(3-) species). The maximum adsorption capacities of LDH and LDH/GO composites calculated from the Langmuir model at pH 4.5 and T = 293 K were 99.01 and 129.87 mg/g, respectively. These findings indicated that GO-based composites can be used as a highly effective adsorbents for the preconcentration and immobilization of radionuclides in environmental cleanup. |
| WOS关键词 | GRAPHENE OXIDE NANOSHEETS ; LAYERED DOUBLE HYDROXIDES ; MULTIWALLED CARBON NANOTUBES ; NANOSCALE ZEROVALENT IRON ; MODELING TECHNIQUES ; ENHANCED ADSORPTION ; EFFICIENT REMOVAL ; AQUEOUS-SOLUTIONS ; THEORETICAL CALCULATIONS ; COMPETITIVE SORPTION |
| 语种 | 英语 |
| WOS记录号 | WOS:000402950000125 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/28760]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Linghu, WS,Yang, H,Sun, YX,et al. One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI)[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2017,5(6):5608-5616. |
| APA | Linghu, WS,Yang, H,Sun, YX,Sheng, GD,&Huang, YY.(2017).One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI).ACS SUSTAINABLE CHEMISTRY & ENGINEERING,5(6),5608-5616. |
| MLA | Linghu, WS,et al."One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI)".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 5.6(2017):5608-5616. |
入库方式： OAI收割
来源：上海应用物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。