Fe^(3+)/TiO_2纳米薄膜的亲水性及光催化性能

Hydrophilicity and Photocatalytic Properties of Fe^(3+)/TiO_2 Nano-Films

采用溶胶-凝胶法制备了一系列不同Fe3+含量的Fe3+/Ti O2纳米薄膜,运用X射线衍射仪、扫描电子显微镜、紫外可见分光光度计等手段对Fe3+/Ti O2进行了表征,并利用接触角测量仪考察了Fe3+含量、保存时间以及薄膜层数对亲水性的影响,同时以8 W(λ=254 nm)的UV灯作为光源,评价了各薄膜光催化降解亚甲基蓝的活性.结果表明,当Fe3+质量分数为0.5%时,Ti O2薄膜催化降解染料的活性得到大幅提高,同时也表现出了最好的亲水性,其薄膜表面与水的接触角几乎为0°.

A series of novel Fe3 ＋/ Ti O2nano-films were synthesized by sol-gel method. The as-synthesized products were characterized by X-ray diffraction（ XRD）,scanning electron microscopy（ SEM） and UVvisible spectrophotometer. Influence of Fe3 ＋doping content,storage time and film layers on the hydrophilicity of the film was investigated by contact goniometer. The photocatalytic activity of the film was evaluated by photocatalytic degradation of methylene blue under the UV light（ 8 W,λ = 254 nm） irradiation. The results indicate that when the doping content of Fe3 ＋is 0. 5%（ mass fraction）,the photocatalytic activity of the Ti O2 film is greatly promoted; furthermore,it also shows the best hydrophilicity,with the contact angle between water and the film approximating 0°.