ZnO/HNTs复合材料的制备及其光催化性能研究.

ZnO/HNTs nano composites are prepared by in-situ growth of ZnO nanoparticles on the surface of halloysite nanotubes (HNTs) using zinc nitrate as zinc source. The ZnO/HNTs are characterized by X-ray diffraction, scanning electron microscope, X-ray energy spectrometer, specific surface area and porosity analyzer, UV visible near infrared diffuse reflectance, and ZetaSizer Nano 9() dynamic light scattering (T)LS) particle size analyzer tester. The adsorption and photocatalytic degradation performance of HNTs, nano-ZnO and ZnO/HNTs composite materials for methylene blue (MB) under UV illumination are investigated. The results show that the nano-Zn() is evenly distributed on the surface of HNTs. Compared with nano-Zn(), the specific surface area of ZnO/HNTs is as high as 44.305 m2/g, which is 1.2 times higher. For ZnO/HNTs, the degradation rate of 1 5 mg/L methylene blue with degradation time of 1.5 h is close to 1()()%, which is much higher than that of nano-ZnO (80.2%), and its repetitive catalytic efficiency maintains remains 80.4% after 10 cycl es. Tt is shown that the introduction of HNTs greatly improved the catalytic activity of ZnO/HNTs. [ABSTRACT FROM AUTHOR]