3D graphene/delta-MnO2 aerogels for highly efficient and reversible removal of heavy metal ions

doi:10.1039/c5ta08106h

HFCAS OpenIR > 中科院固体物理研究所

	3D graphene/delta-MnO2 aerogels for highly efficient and reversible removal of heavy metal ions
	Liu, Juntao 1; Ge, Xiao 1; Ye, Xinxin 1; Wang, Guozhong1 ; Zhang, Haimin 1; Zhou, Hongjian 1; Zhang, Yunxia1 ; Zhao, Huijun 1,2
	2016
发表期刊	JOURNAL OF MATERIALS CHEMISTRY A
摘要	Novel three-dimensional (3D) graphene/delta-MnO2 aerogels were fabricated via self-assembly and reduction of graphene oxide, followed by in situ solution-phase deposition of ultrathin delta-MnO2 nanosheets. The resultant graphene/delta-MnO2 architectures showed an interconnected 3D network microstructure, in which a large number of ultrathin birnessite MnO2 nanosheets were homogenously deposited on the graphene framework. Due to their unique structural characteristics, the resulting 3D aerogels exhibited a fast adsorption kinetic rate and superior adsorption capacity toward heavy metal ions. The saturated adsorption capacities of graphene/delta-MnO2 aerogels were as large as 643.62 mg g(-1) for Pb2+, 250.31 mg g(-1) for Cd2+ and 228.46 mg g(-1) for Cu2+ calculated by the Langmuir isotherm model, exceeding largely the corresponding pristine 3D graphene and delta-MnO2 nanosheets. It was noted that the heavy metal ions could not only adsorb on the surface of graphene/delta-MnO2, but also intercalate into the interlayer gaps of birnessite MnO2, which reveals the synergistic effect of the static electrical attraction, surface complexation and ion exchange between heavy metal ions and pre-intercalated K+, supported by the expansion of the basic crystal structure of layered MnO2 after adsorption. Furthermore, it is interesting that the regenerated aerogels after the initial HCl and subsequent KOH treatment still maintain their original shape and can be repeatedly used for more than eight cycles without obvious degradation of performance, which achieved the sustainability of the absorbents. More importantly, the hybrid aerogels can be easily separated and do not generate secondary contaminants. High removal efficiency, fast adsorption kinetics, excellent regeneration and reusability, and ease of separation operation make these hybrid aerogels ideal candidates for heavy metal ion decontamination in practical application.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences ; Technology
DOI	10.1039/c5ta08106h
关键词[WOS]	OXIDE-COATED SAND ; MORPHOLOGY-CONTROLLED SYNTHESIS ; SHAPE-CONTROLLED SYNTHESIS ; SUPERIOR LITHIUM STORAGE ; GRAPHENE OXIDE ; ADSORPTIVE REMOVAL ; AQUEOUS-SOLUTIONS ; INORGANIC-IONS ; HYBRID ; SORPTION
收录类别	SCI
语种	英语
项目资助者	National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Basic Research Program of China(2013CB934302) ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; National Natural Science Foundation of China(51272255 ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China ; 51472246 ; 51472246 ; 51472246 ; 51472246 ; 51472246 ; 51472246 ; 51472246 ; 51472246 ; 51572263 ; 51572263 ; 51572263 ; 51572263 ; 51572263 ; 51572263 ; 51572263 ; 51572263 ; 21177132) ; 21177132) ; 21177132) ; 21177132) ; 21177132) ; 21177132) ; 21177132) ; 21177132)
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000368839200050
引用统计	被引频次：257[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/21992
专题	中科院固体物理研究所
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Key Lab Mat Phys,Ctr Environm & Energy Nanomat, Hefei 230031, Peoples R China 2.Griffith Univ, Ctr Clean Environm & Energy, Gold Coast Campus, Nathan, Qld 4222, Australia
推荐引用方式 GB/T 7714	Liu, Juntao,Ge, Xiao,Ye, Xinxin,et al. 3D graphene/delta-MnO2 aerogels for highly efficient and reversible removal of heavy metal ions[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(5):1970-1979.
APA	Liu, Juntao.,Ge, Xiao.,Ye, Xinxin.,Wang, Guozhong.,Zhang, Haimin.,...&Zhao, Huijun.(2016).3D graphene/delta-MnO2 aerogels for highly efficient and reversible removal of heavy metal ions.JOURNAL OF MATERIALS CHEMISTRY A,4(5),1970-1979.
MLA	Liu, Juntao,et al."3D graphene/delta-MnO2 aerogels for highly efficient and reversible removal of heavy metal ions".JOURNAL OF MATERIALS CHEMISTRY A 4.5(2016):1970-1979.

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