Open Access Nano Express

Hollow Sodium Tungsten Bronze (Na0.15WO3) Nanospheres: Preparation, Characterization, and Their Adsorption Properties

Jing Hou12, Guanke Zuo3, Guangxia Shen1, He Guo3, Hui Liu3, Ping Cheng1, Jingyan Zhang3* and Shouwu Guo1*

Author Affiliations

1 National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, 200240, Shanghai, People’s Republic of China

2 School of Materials Science & Engineering, East China University of Science and Technology, 200237, Shanghai, People’s Republic of China

3 School of Pharmacy, East China University of Science and Technology, 200237, Shanghai, People’s Republic of China

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Nanoscale Research Letters 2009, 4:1241-1246  doi:10.1007/s11671-009-9383-x

Published: 17 July 2009

Abstract

We report herein a facile method for the preparation of sodium tungsten bronzes hollow nanospheres using hydrogen gas bubbles as reactant for chemical reduction of tungstate to tungsten and as template for the formation of hollow nanospheres at the same time. The chemical composition and the crystalline state of the as-prepared hollow Na0.15WO3nanospheres were characterized complementarily, and the hollow structure formation mechanism was proposed. The hollow Na0.15WO3nanospheres showed large Brunauer–Emment–Teller specific area (33.8 m2 g−1), strong resistance to acids, and excellent ability to remove organic molecules such as dye and proteins from aqueous solutions. These illustrate that the hollow nanospheres of Na0.15WO3should be a useful adsorbent.

Keywords:
Sodium tungsten bronze; Hollow nanosphere; Adsorption property