One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI)

doi:10.1021/acssuschemeng.7b01303

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	One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI)
	Linghu, WS; Yang, H; Sun, YX; Sheng, GD; Huang, YY
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	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
内容类型	期刊论文
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.