Electrostatic self-assembly of TiO2 nanoparticles onto carbon spheres with enhanced adsorption capability for Cr(VI)

被引：29

作者：

Qian, Huanhuan ^{[1
]}

Hu, Yong ^{[1
]}

Liu, Yu ^{[1
]}

Zhou, Mojiao ^{[1
]}

Guo, Changfa ^{[1
]}

机构：

[1] Zhejiang Normal Univ, Inst Phys Chem, Jinhua 321004, Peoples R China

来源：

MATERIALS LETTERS | 2012年 / 68卷

关键词：

Carbon materials; Nanoparticles; Electrostatic self-assembly; Cr(VI) adsorption; PHOTOCATALYTIC DEGRADATION; AQUEOUS-SOLUTIONS; METAL-OXIDES; WASTE-WATER; REMOVAL; CHROMIUM; NANOTUBES; DIOXIDE;

D O I：

10.1016/j.matlet.2011.10.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A rapid electrostatic assembly method has been developed for deposition of highly dispersed TiO2 nanoparticles on the surface of carbon spheres. Surface charges on carbon spheres are found to facilitate the spontaneous deposition of the TiO2 nanoparticles, in which no additional chemicals are required in this assembling process. In the formed C/TiO2 hybrid structure, carbon microspheres not only reduce the agglomeration of TiO2 nanoparticles, but also allow easy separation from the reaction medium for reuse. Remarkably, the as-prepared C/TiO2 hybrid microspheres exhibit a superior adsorption capacity for Cr(VI), which is 3.6 times greater than that of commercial Degussa P25 TiO2 nanoparticles. The effect of pH value in solution on the adsorption capacity of the products has also been systematically investigated. (c) 2011 Elsevier B.V. All rights reserved.

引用

页码：174 / 177

页数：4

共 21 条

[1] Engineering the growth of TiO2 nanotube arrays on flexible carbon fibre sheets [J].

Chen, Peng ;

Gu, Li ;

Xue, Xiudong ;

Li, Mingjuan ;

Cao, Xuebo .

CHEMICAL COMMUNICATIONS, 2010, 46 (32) :5906-5908

[2] Preparation of titania hollow spheres by catalyst-free hydrothermal method and their high thermal stabilities [J].

Feng, Xuan ;

Yang, Ling ;

Liu, Yingliang .

APPLIED SURFACE SCIENCE, 2010, 257 (03) :756-761

[3] Biosorption of chromium(VI) from aqueous solutions by green algae Spirogyra species [J].

Gupta, VK ;

Shrivastava, AK ;

Jain, N .

WATER RESEARCH, 2001, 35 (17) :4079-4085

[4] Immobilization of TiO2 on perlite granules for photocatalytic degradation of phenol [J].

Hosseini, S. N. ;

Borghei, S. M. ;

Vossoughi, M. ;

Taghavinia, N. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 74 (1-2) :53-62

[5] Removal and recovery of Cr(VI) from wastewater by maghemite nanoparticles [J].

Hu, J ;

Chen, GH ;

Lo, IMC .

WATER RESEARCH, 2005, 39 (18) :4528-4536

[6] Synthesis of hierarchically structured metal oxides and their application in heavy metal ion removal [J].

Hu, Jin-Song ;

Zhong, Liang-Shu ;

Song, Wei-Guo ;

Wan, Li-Jun .

ADVANCED MATERIALS, 2008, 20 (15) :2977-2982

[7] Coating Colloidal Carbon Spheres with CdS Nanoparticles: Microwave-Assisted Synthesis and Enhanced Photocatalytic Activity [J].

Hu, Yong ;

Liu, Yu ;

Qian, Haisheng ;

Li, Zhengquan ;

Chen, Jiafu .

LANGMUIR, 2010, 26 (23) :18570-18575

[8]

Kongsricharoern N, 1996, WATER SCI TECHNOL, V34, P109, DOI 10.1016/S0273-1223(96)00793-7

[9] Removal of chromium(VI) from aqueous solutions by polymer inclusion membranes [J].

Kozlowski, CA ;

Walkowiak, W .

WATER RESEARCH, 2002, 36 (19) :4870-4876

[10] Preparation of nanocomposites of metals, metal oxides, and carbon nanotubes via self-assembly [J].

Li, Jing ;

Tang, Songbai ;

Lu, Li ;

Zeng, Hua Chun .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (30) :9401-9409

← 1 2 3 →