摘要
应用分子自组装法,以外侧官能团为巯基(-SH)的自组装单层为模板,在TiCl_4-HCl、Fe(NO_3)_3-HNO_3液相反应体系中,分别在活性炭(AC)和石英玻璃片基底上负载了FeOOH-TiO_2纳米复合膜。利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)等技术手段对实验样品进行测试表征。研究分析复合材料对甲基橙溶液的吸附及光催化性能。研究结果表明不同基材表面FeOOH晶型为针铁矿,TiO_2晶型为锐钛矿。虽然晶型相同,但是二者显微形貌有所区别,且FeOOH/TiO_2/AC材料的吸附性能及光催化性能明显高于石英基FeOOH-TiO_2复合膜性能。根据实验结果分析认为基材性质的不同是造成表面形貌、微结构、吸附性能以及光催化活性差异的主要原因。
Through the molecular self-assembly method, the SAMs whose outer functional group is-SH were adopted as the template for loading the FeOOH-TiO_2 nano-composite respectively on AC and quartz glass substrates in aqueous systems of TiCl_4-HCl, Fe(NO_3)_3-HNO_3. The samples were characterized by TEM and SEM. The adsorption and photocatalytic degradation of methyl orange solution by FeOOH-TiO_2 composite film were analyzed. Results indicate that the crystal form of FeOOH is goethite and the crystal form of TiO_2 is anatase. Although the crystal forms are the same, their microstructures are quite different. The adsorption and photocatalytic degradation properties of FeOOH/TiO_2/AC are significantly higher than those of quartz based FeOOH-TiO_2 materials. Due to these experimental results, it can be considered that the property differences of substrates mainly cause the divergence in surface morphology,adsorption properties and photocatalytic activity.
引文
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