High performance polydopamine-functionalized mesoporous silica nanospheres for U(VI) removal

被引：77

作者：

Bai, Linfeng ^{[1
,2
]}

Duan, Shengxia ^{[3
]}

Jiang, Wanquan ^{[1
]}

Liu, Mei ^{[1
]}

Wang, Sheng ^{[1
]}

Sang, Min ^{[1
]}

Gong, Xinglong ^{[2
]}

Li, Jiaxing ^{[3
]}

Xuan, Shouhu ^{[2
]}

机构：

[1] USTC, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, Hefei 230026, Anhui, Peoples R China

[2] USTC, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Anhui, Peoples R China

[3] Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, POB 1126, Hefei 230031, Anhui, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 426卷

基金：

中国国家自然科学基金;

关键词：

Dopamine; Mesoporous silica; Adsorption; U(VI); MULTIWALLED CARBON NANOTUBES; AQUEOUS-SOLUTIONS; GRAPHENE OXIDE; EFFICIENT REMOVAL; URANIUM EXTRACTION; BIO-NANOCOMPOSITES; WASTE-WATER; ADSORPTION; SORPTION; RADIONUCLIDES;

D O I：

10.1016/j.apsusc.2017.07.274

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This work reports the fabrication of polydopamine-functionalized mesoporous silica (mSiO(2)/PDA) nanospheres for removing U(VI) from aqueous solution. The maximum adsorption capacity of mSiO(2)/PDA is 332.3mg/g at 318.15 K and pH = 5.5. In comparison to the pristine mSiO(2), the adsorption capacity of mSiO(2)/PDA has been remarkably enhanced, which can be ascribed to the large amounts of functional groups existed on the surface of mSiO(2)/PDA. The adsorption process fits well with the pseudo-second-order kinetics model. The adsorption isotherm follows the Langmuir isotherm model, revealing a monolayer adsorption of U(VI) onto mSiO(2)/PDA. Thermodynamic analysis indicates a spontaneous and endothermic adsorption process. Additionally, this adsorption process is pH-dependent, while the effect of ionic strength is negligible. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1121 / 1132

页数：12

共 69 条

[1] Preparation of a novel electrospun polyvinyl alcohol/titanium oxide nanofiber adsorbent modified with mercapto groups for uranium(VI) and thorium(IV) removal from aqueous solution [J].