纳米ZnO的水热合成及性能研究

采用简单的水热方法制备出纯净且粒径均匀的纳米Zn O粒子,借助于X射线粉末衍射仪(XRD)和扫描电子显微镜(SEM)对其物相组成及表面形貌进行了表征,通过日光下亚甲基蓝的降解研究了其光催化性能。将获得的ZnO纳米粒子沉积成膜,经表面修饰低表面能物质1H,1H,2H,2H-全氟辛基三氯硅烷(CAS)后,采用接触角测量仪研究了其润湿性能。结果表明,反应时间为20 h的ZnO纳米粒子在日光照射20 min后,亚甲基蓝的降解率达到90%以上;经表面修饰CAS后,Zn O膜呈现良好的疏水性能;经紫外光照射后,疏水性ZnO膜转换为亲水性,实现了润湿性的转换。

Hydrothermal Synthesis and Properties of Zinc Oxide Nanoparticles

ZnO nanoparticles were prepared by a simple hydrothermal method,. The phase and morphology of the prepared nanoparticles were characterized by XRD and SEM. The photocatalytic activities of as-prepared ZnO nanoparticles were measured by the degradation of methylene blue aqueous solution under sunlight. ZnO films were fabricated through depositing ZnO nanoparticles on substrates, followed by modifying with low surface energy material 1H,1H,2H,2H perfluorooctyl trichloro silane (CAS). The wettabilitis of ZnO films were studied by measuring water contact angle. The results showed that the degradation rate of methylene blue aqueous solution reached over 90% after exposure to the sunlight for 20 min in the presence ZnO nanoparticle with reaction time of 20 h. Meanwhile, as-prepared ZnO films showed hydrophobicity after modified with CAS. The hydrophobic ZnO films switched to hydrophilicity after UV irradiation.