纳米TiO2薄膜的制备及掺氮改性研究

Study on Preparation and Modification of N-Doped Nano-TiO2 Film

摘要: 采用溶胶-凝胶法制得二氧化钛的溶胶溶液,以载玻片为基底,进行浸渍-提拉制备了表面均匀的纳米TiO2薄膜.以水合肼为氮源、用微波法对不同层数的薄膜进行改性,得到了掺氮二氧化钛薄膜.通过紫外可见吸收光谱( UV - vis)、X射线衍射(XRD)、X光电子能谱(XPS)、扫描电镜(SEM)、原子力显微镜(AFM)和接触角仪等进行表征.结果表明:微波辐照后,薄膜的表面有N元素的存在,其表观形貌没有发生变化且具有更好的亲水性,改性后薄膜对光的吸收阈值出现了明显的红移.

Abstract: Nano-sized TiO₂ thin films were prepared through sol-gel method on soda-lime glass.N doped TiO₂ thin films with different layers were prepared by microwave method with N₂H₄·H₂O as nitrogen source. The samples were characterized by UV-vis，XRD，XPS，SEM，AFM and contact angle. The results indicated that there was N1S after microwave treatment .There were no apparently change to the crystallographic forms before and after microwave treatment. The light absorption of nano TiO₂thin films moved to the visible region.