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	Fabrication of a phosphorylated graphene oxide-chitosan composite for highly effective and selective capture of U(VI)
	Cai, YW; Wu, CF; Liu, ZY; Zhang, LJ; Chen, LH; Wang, JQ; Wang, XK; Yang, ST; Wang, S
	2017
发表期刊	ENVIRONMENTAL SCIENCE-NANO
ISSN	2051-8153
卷号	4期号:9页码:1876-1886
文章类型	期刊论文
摘要	Uranium is not only a strategic resource for nuclear power but also a highly toxic contaminant in the environment. Although a series of traditional capturing materials including zeolites, metal-organic frameworks, mesoporous silica, and carbon-based nanomaterials have been investigated and developed, the combined advantages of decent stability, ultrafast removal kinetics, high sorption capacity, great selectivity, and potential recyclability have yet to be integrated into a single material. Herein, a new synthesis strategy was developed to synthesize a novel phosphorylated graphene oxide (GO)-chitosan (CS) composite (denoted as GO-CS-P) for U(VI) removal. The crosslinking of GO with CS and the subsequent phosphorylation of the GO-CS composite were demonstrated by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), zeta potential measurement, thermogravimetric (TG) analysis, and scanning transmission electron microscopy (STEM). Batch experiments and spectroscopic analysis were performed to explore the removal performance and mechanism of GO-CS-P towards U(VI). The results showed that the uptake of U(VI) was ultrafast as the sorption equilibrium could be reached within 15 min. The maximum sorption capacity of U(VI) at pH 5.0 and 293 K was calculated to be 779.44 mg g(-1), one of the highest values among the currently reported adsorbents. GO-CS-P also exhibited an excellent selectivity for capturing U(VI) from a mixture containing multiple competing metal ions. According to the desorption experiments, FTIR, X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS) analysis, the highly efficient immobilization of U(VI) in GO-CS-P was predominantly controlled by inner-sphere surface complexation with a minor contribution of surface reduction. The experimental findings demonstrated the feasibility of using GO-CS-P for used nuclear fuel partition and uranium-bearing wastewater remediation.
关键词	Multiwalled Carbon Nanotubes Metal-organic Framework Aqueous-solution Functionalized Graphene Mesoporous Silica Efficient Removal High-performance Heavy-metals Waste-water Humic-acid
DOI	10.1039/c7en00412e
关键词[WOS]	MULTIWALLED CARBON NANOTUBES ; METAL-ORGANIC FRAMEWORK ; AQUEOUS-SOLUTION ; FUNCTIONALIZED GRAPHENE ; MESOPOROUS SILICA ; EFFICIENT REMOVAL ; HIGH-PERFORMANCE ; HEAVY-METALS ; WASTE-WATER ; HUMIC-ACID
收录类别	SCI
语种	英语
WOS记录号	WOS:000410649200011
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/28653
专题	中科院上海应用物理研究所2011-2018年
推荐引用方式 GB/T 7714	Cai, YW,Wu, CF,Liu, ZY,et al. Fabrication of a phosphorylated graphene oxide-chitosan composite for highly effective and selective capture of U(VI)[J]. ENVIRONMENTAL SCIENCE-NANO,2017,4(9):1876-1886.
APA	Cai, YW.,Wu, CF.,Liu, ZY.,Zhang, LJ.,Chen, LH.,...&Wang, S.(2017).Fabrication of a phosphorylated graphene oxide-chitosan composite for highly effective and selective capture of U(VI).ENVIRONMENTAL SCIENCE-NANO,4(9),1876-1886.
MLA	Cai, YW,et al."Fabrication of a phosphorylated graphene oxide-chitosan composite for highly effective and selective capture of U(VI)".ENVIRONMENTAL SCIENCE-NANO 4.9(2017):1876-1886.

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