Fabrication of tungsten oxide nanostructure by Sol-Gel method

被引:26
作者
Chai, Y. [1 ]
Ha, F. Y. [1 ]
Yam, F. K. [1 ]
Hassan, Z. [1 ]
机构
[1] Univ Sains Malaysia, Sch Phys, Nanooptoelect Res & Technol Lab, Gelugor, Malaysia
来源
5TH INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MINERALS AND ENVIRONMENT (RAMM) & 2ND INTERNATIONAL POSTGRADUATE CONFERENCE ON MATERIALS, MINERAL AND POLYMER (MAMIP) | 2016年 / 19卷
关键词
tungsten oxide; sol-gel; gas sensor;
D O I
10.1016/j.proche.2016.03.123
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this work, we present the effects of mixing sequence of sodium tungstate and nitric acid, as well as the aging duration on the formation of tungsten oxide by sol-gel method. Increase of the aging duration allows the formation of uniform platelet structure where no structure could be detected at 1 aging day while uniform platelet structure could be detected at 30 days. Hydrated tungsten oxide platelets of 1-1 theta (3)m could be formed by mixing sodium tungstate into nitric acid (sample labeled as W-A) which could be reduced significantly in size to 200-600 nm by changing the mixing sequence to drop nitric acid into sodium tungstate (sample labeled as A-W). Crystalline hydrated tungsten oxides were obtained for both samples where W-A sample shows better degree of crystallinity. Room temperature hydrogen gas sensing property was successfully detected by both samples where A-W sample demonstrates similar to 2.5 times higher sensor response to hydrogen gas compared to W-A sample. (C) 2016 Published by Elsevier B.V.
引用
收藏
页码:113 / 118
页数:6
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