Synthesis of amidoximated polyacrylonitrile nanoparticle/graphene composite hydrogel for selective uranium sorption from saline lake brine

doi:10.1016/j.cej.2019.123553

	Synthesis of amidoximated polyacrylonitrile nanoparticle/graphene composite hydrogel for selective uranium sorption from saline lake brine
	Bai, Jing 2; Chu, Jian 1,2; Yin, Xiaojie 2; Wang, Jieru 1,2; Tian, Wei 2; Huang, Qinggang 2; Jia, Zimeng 1,2; Wu, Xiaolei 2; Guo, Hangxu 1,2; Qin, Zhi 2
刊名	CHEMICAL ENGINEERING JOURNAL
	2020-07-01
卷号	391 页码:8
关键词	Hydrogel Amidoxime groups Uranium Sorption Saline lake brines
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.123553
通讯作者	Bai, Jing(baijing@impcas.ac.cn) ; Qin, Zhi(qinzhi@impcas.ac.cn)
英文摘要	In order to increase the selectivity of graphene hydrogel (GH) for uranium and ensure its possible application in uranium extraction from complicated systems, such as seawater and saline lake brines, GH with amidoxime groups needs to be prepared. However, it is not an easy task to grafting amidoxime groups on GH. At present work, an innovative method is used to fabricate the amidoximated graphene hydrogel, polyarylonitrile nanoparticle/graphene composite hydrogel (PAO/GH), through simultaneously encapsulating polyacrylonitrile (PAN) nanoparticles in hydrogel formation process and then amidoximation. The prepared adsorbent is characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and BET specific surface area analyses. All the results prove that PAO/GH with amidoxime groups is successfully obtained. The effects of initial solution pH, ionic strength, time and initial uranium concentration on uranium sorption by PAO/GH are studied systematically and compared with the blank graphene hydrogel (GH). The uranium selectivity of PAO/GH increases obviously after introducing amidoxime groups. Moreover, the mechanism of uranium sorption by PAO/GH is also explored with different characterization methods. Amidoxime groups are revealed to be the main functional groups involved in uranium sorption by PAO/GH and served as electron donor. Basis on the above results, uranium extraction from natural saline lake brine by PAO/GH is also performed and PAO/GH is testified to be a promising adsorbent for recovering uranium from complicated systems.
资助项目	National Natural Science Foundation of China[11575260] ; National Natural Science Foundation of China[U1932142] ; National Natural Science Foundation of China[11505250]
WOS关键词	MESOPOROUS SILICA ; CARBON NANOTUBES ; GRAPHENE ; ADSORPTION ; EXTRACTION ; RECOVERY ; SEAWATER ; U(VI) ; NANOSHEETS ; REDUCTION
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000545945100058
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140320]
专题	中国科学院近代物理研究所
通讯作者	Bai, Jing; Qin, Zhi
作者单位	1.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Bai, Jing,Chu, Jian,Yin, Xiaojie,et al. Synthesis of amidoximated polyacrylonitrile nanoparticle/graphene composite hydrogel for selective uranium sorption from saline lake brine[J]. CHEMICAL ENGINEERING JOURNAL,2020,391:8.
APA	Bai, Jing.,Chu, Jian.,Yin, Xiaojie.,Wang, Jieru.,Tian, Wei.,...&Qin, Zhi.(2020).Synthesis of amidoximated polyacrylonitrile nanoparticle/graphene composite hydrogel for selective uranium sorption from saline lake brine.CHEMICAL ENGINEERING JOURNAL,391,8.
MLA	Bai, Jing,et al."Synthesis of amidoximated polyacrylonitrile nanoparticle/graphene composite hydrogel for selective uranium sorption from saline lake brine".CHEMICAL ENGINEERING JOURNAL 391(2020):8.