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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (24): 2955-2958.DOI: 10.6023/A1104263 上一篇    下一篇

研究论文

带坑WO3单晶纳米片的合成与光学性能

朱庆俊, 俞建长*, 黄清明, 张新奇   

  1. (福州大学材料科学与工程学院 福州 350108)
  • 投稿日期:2011-04-26 修回日期:2011-07-13 发布日期:2011-08-24
  • 通讯作者: 俞建长 E-mail:jcyu719@163.com
  • 基金资助:

    福建省自然科学基金

Synthesis and Optical Properties of Single Crystal WO3 Nanoplates with Nano-Pits

ZHU Qing-Jun, YU Jian-Chang, HUANG Qing-Ming, ZHANG Xin-Qi   

  1. (College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108)
  • Received:2011-04-26 Revised:2011-07-13 Published:2011-08-24

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以介孔二氧化硅(SBA-15)为硬模板, 钨酸钠(Na2WO4•2H2O)为钨源, 在酸性条件下, 用改进的浸渍-还原法合成了具有纳米坑结构的单晶片状WO3材料. 用X射线衍射(XRD)、能量扩散X射线(EDX)、扫描电子显微镜(SEM)、高分辨透射电镜(HRTEM)和紫外-可见光区透射光谱(UV-Vis)等手段对产物的组成、形貌和光学性能进行了表征. 结果表明, 获得的产物为带有纳米坑结构的单晶片状WO3, 且在近紫外-可见光区具有较高的透射率. 此外, 随着煅烧温度的升高, WO3由单斜相转变为单斜相与正交相的混合相, WO3薄膜的紫外-可见光透射率随煅烧温度升高而升高.

关键词: SBA-15, 浸渍-还原法, 纳米坑, WO3

Using tungstate (Na2WO4•2H2O) and mesoporous silica dioxide (SBA-15) as tungsten raw material and hard template respectively, tungsten oxide nanoplates with nano-pits were successfully synthesized in the acidic condition by a modified dipping-reduction method. The composition, morphology and optical properties of as-prepared products were characterized by X-ray diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM) and ultraviolet-visible transmission spectrum (UV-Vis). Results showed that the products were single crystal tungsten oxide nanoplates with nano-pits which had higher transmission rate in the near UV-visible region. Furthermore, The WO3 thin films changed from the monoclinic to monoclinic phase and orthogonal phase with the increase of sintered temperature, and the UV-visible light transmittance increased with sintered temperature of WO3 thin film.

Key words: SBA-15, dipping-reduction method, nano-pits, tungsten oxide