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Open Access Nano Express

Significantly enhanced dye removal performance of hollow tin oxide nanoparticles via carbon coating in dark environment and study of its mechanism

Shuanglei Yang12, Zhaohui Wu4, LanPing Huang1, Banghong Zhou1, Mei Lei3, Lingling Sun3, Qingyong Tian3, Jun Pan1, Wei Wu2* and Hongbo Zhang1*

Author Affiliations

1 State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China

2 Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, People's Republic of China

3 Key Laboratory of Artificial Micro and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China

4 Department of Chemical Engineering, Kyung Hee University, Seocheon-Dong, Giheung-Gu, 446-701 Yongin, Korea

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Nanoscale Research Letters 2014, 9:442  doi:10.1186/1556-276X-9-442

Published: 28 August 2014

Abstract

Understanding the correlation between physicochemical properties and morphology of nanostructures is a prerequisite for widespread applications of nanomaterials in environmental application areas. Herein, we illustrated that the uniform-sized SnO2@C hollow nanoparticles were large-scale synthesized by a facile hydrothermal method. The size of the core-shell hollow nanoparticles was about 56 nm, and the shell was composed of a solid carbon layer with a thickness of 2 ~ 3 nm. The resulting products were characterized in terms of morphology, composition, and surface property by various analytical techniques. Moreover, the SnO2@C hollow nanoparticles are shown to be effective adsorbents for removing four different dyes from aqueous solutions, which is superior to the pure hollow SnO2 nanoparticles and commercial SnO2. The enhanced mechanism has also been discussed, which can be attributed to the high specific surface areas after carbon coating.

Keywords:
Tin oxide; Carbon coating; Core-shell; Dye removal