Adsorption of Cu(II) and Cd(II) on titanate nanomaterials synthesized   via hydrothermal method under different NaOH concentrations: Role of   sodium content

doi:10.1016/j.colsurfa.2014.03.093

CORC > 北京大学 > 环境科学与工程学院

	Adsorption of Cu(II) and Cd(II) on titanate nanomaterials synthesized via hydrothermal method under different NaOH concentrations: Role of sodium content
	Liu, Wen ; Sun, Weiling ; Han, Yunfei ; Ahmad, Muhammad ; Ni, Jinren
刊名	colloids and surfaces a physicochemical and engineering aspects
	2014
关键词	Titanate nanomaterials NaOH concentration Adsorption Heavy metal Sodium content AQUEOUS-SOLUTION COMPETITIVE ADSORPTION PHOTOCATALYTIC ACTIVITY TITANIUM-DIOXIDE TIO2 NANOTUBES IONIC-STRENGTH SHEAR PLANE PB(II) IONS REMOVAL EFFICIENT
DOI	10.1016/j.colsurfa.2014.03.093
英文摘要	A series of titanate nanomaterials (TNMs) were synthesized via hydrothermal reaction under different NaOH concentrations (4-15 mol/L), and then used to remove Cu(II) and Cd(II) from aqueous solution. Transmission electron microscope (TEM) revealed that the morphology of the TNMs successively presented as nano-granules, nanoplates, nanotubes, nanosheets and nano-blocks with increasing NaOH concentration. X-ray diffraction (XRD) analysis indicated that the crystal phase or the TNMs changed as mixture of TiO2 and crystalline titanate, pure titanate and amorphous phase with increasing NaOH concentration. The TNMs which possessed titanate phase presented excellent adsorption performance, with maximum adsorption capacity of ca. 120 mg/g and 210 mg/g for Cu(II) and Cd(II) respectively. Moreover, the adsorption capacity showed a good correlation with the sodium content of TNMs, with R-2 of 0.994 and 0.986 for Cu(II) and Cd(II) respectively. Therefore, the primary adsorption mechanism was ion-exchange between Na+ and metal ions, thus -ONa groups were the main adsorption sites. Other mechanisms like ion-exchange with H+ and complexation by -OH also could not be ignored. Furthermore, specific surface area and average pore diameter was found to have no definite relationship with adsorption capacity for the TNMs with titanate phase. (C) 2014 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000336708100020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; SCI(E); EI; 13; ARTICLE; nijinren@iee.pku.cn; 1; 138-147; 452
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158255]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Liu, Wen,Sun, Weiling,Han, Yunfei,et al. Adsorption of Cu(II) and Cd(II) on titanate nanomaterials synthesized via hydrothermal method under different NaOH concentrations: Role of sodium content[J]. colloids and surfaces a physicochemical and engineering aspects,2014.
APA	Liu, Wen,Sun, Weiling,Han, Yunfei,Ahmad, Muhammad,&Ni, Jinren.(2014).Adsorption of Cu(II) and Cd(II) on titanate nanomaterials synthesized via hydrothermal method under different NaOH concentrations: Role of sodium content.colloids and surfaces a physicochemical and engineering aspects.
MLA	Liu, Wen,et al."Adsorption of Cu(II) and Cd(II) on titanate nanomaterials synthesized via hydrothermal method under different NaOH concentrations: Role of sodium content".colloids and surfaces a physicochemical and engineering aspects (2014).