喷雾干燥法制备中空偏钨酸铵球及中空结构形成机理

发布时间：2018-05-11 01:37

  本文选题：WO + 偏钨酸铵　； 参考：《粉末冶金工业》2017年04期

【摘要】：WO_3基纳米材料具有光催化降解、光解水、电致变色、热致变色和光致变色等特性,在光催化剂、新能源制备、智能窗口、传感器和平板显示器等领域有广泛的应用前景。采用喷雾干燥法成功制备了中空偏钨酸铵球,分析了其制备过程和中空结构的形成机理。结果表明:采用喷雾干燥法制备的中空偏钨酸铵球球体平均粒径为1.03μm,壁厚约为100 nm;其制备过程分为雾化、闪蒸干燥形成壳、中空结构形成3个阶段;干燥塔内由于热空气初始温度为130℃,远高于水的沸点,使液滴表面的水分迅速蒸发,由于蒸发速度非常快,从而在液滴表面结晶而形成壳,进而形成空心结构。
[Abstract]:WO_3 based nanomaterials are widely used in photocatalysis, photocatalytic degradation, photodegradation, photochromic, thermochromic, photochromic and photochromic properties, such as photocatalyst, new energy preparation, intelligent window, sensor and flat panel display. The hollow ammonium metatungstate spheres were successfully prepared by spray drying. The preparation process and the formation mechanism of hollow structures were analyzed. The results showed that the average diameter and wall thickness of the hollow ammonium metatungstate spheres prepared by spray drying were 1.03 渭 m and 100 nm respectively, and the preparation process was divided into three stages: atomization, flash drying, shell formation and hollow structure formation. Because the initial temperature of hot air is 130 鈩，

本文编号：1871850