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首先利用水热法制备了由纳米片组装的粒径为1.5–2μm的Bi2WO6微球,然后在微球表面沉积了不同含量的AgC l(5 wt%,10 wt%,20 wt%,30 wt%),制备了异质结构Ag Cl/Bi2WO6微球光催化剂.利用X射线粉末衍射、扫描电镜、透射电镜、红外光谱、紫外-可见漫反射吸收等手段对所制的光催化剂进行表征,并以紫外光和可见光分别为光源,罗丹明B为降解对象测试了其光催化活性,考察复合不同含量的AgC l对Bi2WO6光催化剂的性能影响.结果表明,沉积AgC l对Bi2WO6的晶体结构、表面性能和光吸收性能没有产生明显影响,但大幅度提高了Bi2WO6的紫外和可见光催化活性.当复合20 wt%Ag Cl时,AgC l/Bi2WO6光催化活性最佳,紫外光下比纯Bi2WO6提高了2.2倍,可见光下提高了1倍.这主要是由于形成的Ag Cl/Bi2WO6异质结能有效抑制光生电子和空穴的复合,从而提了其光催化性能.
Firstly, Bi2WO6 microspheres with 1.5-2μm particle size assembled by nanosheets were prepared by hydrothermal method. Different concentrations of AgCl (5wt%, 10wt%, 20wt%, 30wt%) were deposited on the surface of the microspheres. %), A heterostructured AgCl / Bi2WO6 microspheres photocatalyst was prepared.The prepared photocatalyst was characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, UV-visible diffuse reflectance absorption and so on The photocatalytic activity of Bi2WO6 photocatalysts was tested by Rhodamine B as the light source and the photocatalytic activity of AgCl with different contents of AgCl.The results show that the crystal structure, The photocatalytic activity of AgC l / Bi2WO6 was the best, and the UV-vis of Bi2WO6 was 2.2% higher than that of pure Bi2WO6 Fold increase in visible light, which is mainly due to the formation of Ag Cl / Bi2WO6 heterojunction can effectively inhibit the photogenerated electron and hole recombination, which raised its photocatalytic properties.