【作者】 刘欢；

【导师】 梁燕萍；

【作者基本信息】 西安电子科技大学 ， 应用化学， 2010， 硕士

【摘要】 本文选择具有高稳定性和高催化活性的酞菁(直接耐晒翠兰GL)作为敏化剂,把酞菁在可见光区的强吸收性及催化特性与TiO2光催化特性集为一体,采用溶胶.凝胶法在Al2O3基底上制备出高催化活性和宽响应范围的酞菁/TiO2复合催化薄膜。以苯酚为模拟污染物,研究了复合催化薄膜的制备条件,光催化活性和光电催化活性,对其影响因素进行了讨论。并对光催化与光电催化过程作了动力学研究。利用X射线粉末衍射(XRD)、紫外可见近红外光谱法、红外光谱法(IR)和交流阻抗测试(EIS)等测试手段对复合膜的微观结构和性能进行了研究。结果表明,复合催化薄膜的催化活性及光响应范围明显高于TiO2,且在电化学辅助条件下催化活性更高。光电催化反应的活化能(11.15kJ/mol)小于光催化反应的活化能(14.81 kJ/mol),光电催化反应更容易进行。更多还原

【Abstract】 The phthalocyanine (direct fast turquoise blue GL) was chosed as the sensitizied material, which has high stability and catalytic activity. Combining the advantages of the excellent properties of both phthalocyanine and TiO2, a composite catalyst with high photo-quantum yield and responsibility at widened spectrum range was prepared by sol-gel method on Al2O3 support in this paper. Using phenol degradation as the model reaction, the preparation conditions of the composite catalyst and its photocatalytic activity, photoelectrocatalytic activity were researched. As well as factors were discussed. The kinetics of photocatalysis and photoelectrocatalysis process were also studied. Its microstructure and properties were analyzed by XRD, IR spectrum, UV-Vis-NIR absorption spectrum, and impedance spectroscopy, et al. The results showed that its catalytic activity and absorbing spectrum range were apparently higher than those of TiO2, and much higer at electrochemical-assisted conditions. The activation energy of photoelectrocatalysis process(11.15kJ/mol) is smaller than that of photocatalysis process(14.81 kJ/mol). And the photoelectrocatalysis process happened easier.更多还原