纳米Cs_xWO_3粉体的溶剂热法制备
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- 英文论文题名：Solvothermal Fabrication of Cesium Tungsten Bronze
- 论文作者：姚勇吉 ; 陈长 ; 高彦峰
- 英文论文作者：Yong Ji Yao ; Zhang Chen ; Yanfeng Gao ; School of Materials Science and Engineering ; Shanghai University
- 年：2016
- 作者机构：上海大学材料科学与工程学院;
- 论文关键词：CsxWO3 ; 溶剂热 ; 近红外吸收 ; 纳米材料
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：TQ131.15;TB383.2
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：371k
- 原文格式：D
- 会议级别：全国
摘要
近红外遮蔽材料一般是指具有较强吸收或反射近红外光而又不影响其可见光透过的一类功能薄膜材料,作为透明隔热材料,在绿色建筑节能和汽车玻璃隔热领域具有十分广泛的应用前景。本研究以钨酸和氯化铯为原料,利用溶剂热法合成了具有优异近红外遮蔽性能的纳米Cs_xWO_3粉体。并将粉体分散于乙醇中,在PET基板上制膜。所用溶剂为甘油和水的混合物,随着水的含量增加,产物的产量增加,Cs的掺杂量增加。水的含量存在一个最优比例,当大于这个含量时,随着水的含量的增加Cs的掺杂量减少,产物的近红外屏蔽性能变差。用X射线衍射仪和能谱仪对Cs_xWO_3粉体的结构和形貌进行了表征,借助紫外–可见分光光度计研究了Cs_xWO_3粉体及薄膜的光学性能。结果表明,Cs_xWO_3粉体为六方结构,Cs/W原子比为0.32,表现出强烈的近红外吸收性能。Cs_xWO_3薄膜具有强烈的近红外屏蔽性能,同时可见光透过率可以达到60%以上。
For the application as heat shielding materials, an excellent shielding ability of NIR rays as well as high visible light transparency is required. Tungstic acid and cesium chloride were used as raw materials, cesium tungsten bronze(Cs_xWO_3) powders were synthesized by hydrothermal method, and the Cs_xWO_3 films were prepared on the surface of PET by dispersing the Cs_xWO_3 powders into ethyl alcohol. The solvent is consisted of glycerol and water, with the increase of water, product yield increase. There is an optimal ratio of water and glycerol, above the ratio, with the increase of water Cs doping amount reduced, near infrared shielding performance degradation. The structure and morphology of the obtained Cs_xWO_3 powders were characterized by X-ray diffractometer and energy dispersive spectrometer. The light absorption of the as-prepared powder and film was investigated by an ultraviolet–visible spectrophotometer. The results indicated that the synthesized Cs_xWO_3 powders were hexagonal Cs_(0.32)WO_3 crystals. The obtained Cs_xWO_3 powders showed strong near-infrared absorption, and the film showed good near-infrared shielding properties with more than 60% of the visible light transmittance.
For the application as heat shielding materials, an excellent shielding ability of NIR rays as well as high visible light transparency is required. Tungstic acid and cesium chloride were used as raw materials, cesium tungsten bronze(Cs_xWO_3) powders were synthesized by hydrothermal method, and the Cs_xWO_3 films were prepared on the surface of PET by dispersing the Cs_xWO_3 powders into ethyl alcohol. The solvent is consisted of glycerol and water, with the increase of water, product yield increase. There is an optimal ratio of water and glycerol, above the ratio, with the increase of water Cs doping amount reduced, near infrared shielding performance degradation. The structure and morphology of the obtained Cs_xWO_3 powders were characterized by X-ray diffractometer and energy dispersive spectrometer. The light absorption of the as-prepared powder and film was investigated by an ultraviolet–visible spectrophotometer. The results indicated that the synthesized Cs_xWO_3 powders were hexagonal Cs_(0.32)WO_3 crystals. The obtained Cs_xWO_3 powders showed strong near-infrared absorption, and the film showed good near-infrared shielding properties with more than 60% of the visible light transmittance.
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