Dealloying derived synthesis of W nanopetal films and their transformation into WO3

被引：36

作者：

Liu, Zhifu ^{[1
]}

Yamazaki, Toshinari ^{[1
]}

Shen, Yanbai ^{[1
]}

Meng, Dan ^{[1
]}

Kikuta, Toshio ^{[1
]}

Nakatani, Noriyuki ^{[1
]}

Kawabata, Tokimasa ^{[1
]}

机构：

[1] Toyama Univ, Sch Engn, Toyama 9308555, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 05期

关键词：

D O I：

10.1021/jp709659r

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：

Cross-linked W nanopetals were synthesized by dealloying the sputtered W-Al alloy film in HNO3 aqueous solution for 24 h under open circuit conditions. Scanning electron microscopy, X-ray diffraction, and transmission electron microscopy characterizations demonstrate that the W nanopetals are less than 100 nm in thickness and have a cubic crystal structure. The W.nanopetals were transformed into monoclinic phase WO3 nanopetals by a controlled thermal oxidation process at 500 degrees C in air. A gas sensor made using the WO3 nanopetals showed promising NO2 sensing performance. The present work indicates a new approach to fabricate high surface area oxide materials for applications such as gas sensors; catalysis, and photochemical devices.

引用

页码：1391 / 1395

页数：5

共 30 条

[1] Enhancement of photocatalytic and electrochromic properties of electrochemically fabricated mesoporous WO3 thin films [J].