Interactions between Th(IV) and graphene oxide: experimental and density functional theoretical investigations

	Interactions between Th(IV) and graphene oxide: experimental and density functional theoretical investigations
	Bai ZQ(白志强); Li ZJ(李子杰); Wang CZ(王聪芝); Bai, ZQ; Li, ZJ; Wang, CZ; Yuan, LY; Liu, ZR; Zhang, J; Zheng, LR
刊名	RSC ADVANCES
	2014
卷号	4 期号:7 页码:3340-3347
英文摘要	Graphene oxide (GO) has been receiving increasing research efforts in recent years because of its wide applications in various scientific fields. In this work the sorption of Th(IV) onto graphene oxide (GO) was studied using a batch method under ambient conditions. The sorption kinetics were found to be fast and fitted the pseudo-second-order model very well, with an equilibrium time of about 10 min. The sorption is strongly dependent on the solution pH but independent of the ionic strength of the solution. The maximum sorption capacity of as high as 214.6 mg g(-1) can be achieved at pH 2.60 +/- 0.05, and Th(IV) can be desorbed readily from the GO with 1.0 M HNO3. The thermodynamic investigations revealed that the sorption of Th(IV) on the GO was an endothermic and spontaneous process. The Scanning Electron Microscopy (SEM) results indicated obvious surface morphology changes of the GO induced by Th(IV) sorption. Furthermore, the interaction mechanism of Th(IV) and the GO was investigated by infrared (IR) spectroscopy and extended X-ray absorption fine structure (EXAFS) spectroscopy combined with density functional theory (DFT) calculations. The results of EXAFS indicated that Th(IV) was bonded to similar to 8 or 9 oxygen atoms and the average bond length of Th-O was estimated to be similar to 2.45 angstrom in the first coordination shell. The DFT calculations further confirm the rationality of experimental and the EXAFS results. This work demonstrates the tremendous potential opportunities offered by GO in preconcentration and removal of thorium and other tetravalent actinides for the recovery and remediation of the environment.
学科主题	Chemistry
收录类别	SCI
WOS记录号	WOS:000329039000035
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225342]
专题	高能物理研究所_院士高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Bai ZQ,Li ZJ,Wang CZ,et al. Interactions between Th(IV) and graphene oxide: experimental and density functional theoretical investigations[J]. RSC ADVANCES,2014,4(7):3340-3347.
APA	白志强.,李子杰.,王聪芝.,Bai, ZQ.,Li, ZJ.,...&郑黎荣.(2014).Interactions between Th(IV) and graphene oxide: experimental and density functional theoretical investigations.RSC ADVANCES,4(7),3340-3347.
MLA	白志强,et al."Interactions between Th(IV) and graphene oxide: experimental and density functional theoretical investigations".RSC ADVANCES 4.7(2014):3340-3347.