摘要
为提高ZnO光催化性能采用超声波辅助微波水热法分别制备了ZnO、Nd/ZnO及Dy/ZnO光催化材料,利用XRD、SEM、FESEM、XPS及亚甲基蓝降解实验对样品的结构与性能进行了表征。研究表明:掺杂Nd及Dy有助于促进六方纤锌矿结构ZnO晶体的生长。与纯ZnO相比,掺杂Nd及Dy促进了样品表面羟基化及氧的吸附,从而提高了ZnO的光催化活性。采用超声波辅助微波水热法制备的样品光催化性能优异,紫外光辐照4 h后,ZnO、Nd/ZnO、Dy/ZnO样品对亚甲基蓝的降解率分别为89.69%,91.01%,91.13%。
ZnO,Nd-doped ZnO and Dy-doped ZnO photocatalyst were prepared by ultrasonic assistedmicrowave hydrothermal method in order to improve the photocatalytic performance of ZnO in this study.Microstructure and performance of samples were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM), field emission scanning electron microscope(FESEM), X-ray photoelectron spectroscopy(XPS) and evaluated with the methylene blue. The results showed that the doping of Nd and Dy promoted the growth of ZnO crystals with a hexagonal wurtzite structure. Moreover,doping of Nd and Dy promoted hydroxylation and oxygen adsorption on surface of samples compared with pure ZnO,which led to the improvement of photocatalytic performance of ZnO. Samples prepared by ultrasonic assisted-microwave hydrothermal method have great photocatalytic performance,under UV irradiation for 4 h,ZnO,Nd/ZnO and Dy/ZnO made the degradation rate of methylene blue respectively reach 89. 69%,91. 01%,91. 13%.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第10期3096-3100,3105,共6页
Bulletin of the Chinese Ceramic Society
关键词
ZNO
稀土掺杂
光催化
超声波辅助微波水热法
结构与性能
ZnO
rare earth doped
photocatalysis
ultrasonic assisted-microwave hydrothermal method
microstructure and performance
