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热处理温度对MoO_3薄膜的结构及光致变色性能的影响
作者:王萍萍 沈毅 赵丽 曹元媛 李珍  
单位:中国地质大学武汉材料科学与化学工程学院 湖北大学材料科学与工程学院  
关键词:热处理温度  光致变色  氧化钼薄膜  溶胶-凝胶法 
分类号:TB383.2
出版年,卷(期):页码:2010,38(2):167-171
DOI:
摘要:

采用溶胶-凝胶浸渍提拉法制备MoO3光致变色薄膜。用色差计表征了材料的光致变色性能,并结合X射线衍射、扫描电镜、紫外-可见吸收光谱研究了热处理温度对其微观结构及性能的影响。结果表明:制备的产物为斜方相MoO3;随热处理温度的升高,MoO3薄膜光致变色性能先增后减。当温度为500℃时,薄膜的结晶度最大,颗粒粒径最小,比表面积较大;色差值最大为1.2330。在该温度下激发波长向长波长移动,薄膜的吸收光波区域变宽,从而使MoO3薄膜的光致变色性能提高。

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Photochromic MoO3 thin films were prepared via sol-gel dip-coating method.The photochromic properties of the MoO3 thin films were characterized by a color difference meter,and the effects of heat-treatment temperature on the microstructure and properties of the MoO3 thin films were investigated by X-ray diffraction,scanning electron microscope and ultraviolet-visible absorption spectroscopy.The results indicate that the product prepared is a rhombic MoO3,and the photochromic properties of the MoO3 thin films first increase and then decrease with the rise of heat-treatment temperature.When the temperature of the heat-treatment was 500 ℃,the MoO3 thin film has higher crystallinity,smaller particle size,and larger specific surface area.Its chromatism value also reaches its maximum value of 1.233 0.The wavelength of the excitation light shifts to a long-wavelength and the light absorption region of the thin film becomes wider at heat-treatment temperature of 500 ℃.Accordingly,the photochromic properties of the MoO3 thin films are enhanced.

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基金项目:
国家自然科学基金青年基金(50702052);; 湖北省教育厅科学技术研究项目(Q20091007)资助项目
作者简介:
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参考文献:

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