欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
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.
英文摘要：
Bi2WO6 microspheres with a diameter of 1.5-2 pm were prepared by a hydrothermal method, and then coated with different contents of AgCl to form heterostructured AgCl/Bi2WO6 microspheres. The prepared Bi2WO6 and AgC1/Bi2WO6 photocatalysts were characterized by X-ray diffraction, N2 physical adsorption, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The pho- tocatalytic activity of the catalysts was evaluated by photocatalytic degradation of rhodamine B under ultraviolet and visible light irradiation. Results showed that the deposition of AgCl had no obvious effect on the light absorption and surface properties of Bi2WO6. However, the heterostruc- tured AgCI/Bi2WO6 photocatalysts exhibited considerably higher activity than the pure AgCl and Bi2WO6 catalysts. With the optimal AgCl content of 20 wt%, the photocatalytic activity of the hetero- structured AgCl/Bi2WO6 catalyst was increased under both ultraviolet and visible light compared with that of Bi2WO6. The main reason for the enhanced photocatalytic activity is attributed to the formation of AgCl/Bi2WO6 heterostructures effectively suppressing the recombination of photo- generated electrons and holes.
同期刊论文项目
同项目期刊论文
~Phase transformation synthesis of novel Ag2O/Ag2CO3 heterostructures with high visible light effici
~Hydrothermal synthesis and characterization of novel PbWO4microspheres with hierarchical nanostruct
A sonochemical route to fabricate the novel porous F, Ce-codoped TiO2 photocatalyst with efficient p
Thermal stability, microstructure and photocatalytic activity of the bismuth oxybromide photocatalys
~Stable Au25(SR)18/ TiO2 Composite Nanostructure with Enhanced Visible Light Photocatalytic Activity
~Novel hollow Pt-ZnO nanocomposite microspheres with hierarchical structure and enhanced photocataly
~Novel noble metal (Rh, Pd, Pt)/BiOX(Cl, Br, I) composite photocatalysts with enhanced photocatalyti
~Synthesis and characterization of Ag/TiO2-B nanosquares with high photocatalytic activity under vis
~Preparation of Co/CexTi1-xO2 Catalysts and Their Catalytic Performance in the Catalytic Partial Oxi
Fast fabricate Co3O4 or CuO/BiVO4 composite photocatalysts with high crystallinity and enhanced phot
An efficient palladium membrane reactor for increase the yield of styrene in ethylbenzene dehydrogen
Preparation of bismuth oxyiodides and oxides and their photooxidation characteristic under visible/U
期刊信息
位置：