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5,10,15,20-四（2-噻吩基）金属卟啉修饰TiO2光催化剂的制备及光催化性能
Preparation of TiO2 Photocatalyst Modified by meso-5,10,15,20-Tetrakis（2-thienyl） Metalloporphyrins and Their Photocatalytic Activities
【摘要】 合成了5,10,15,20-四(2-噻吩基)卟啉(H2TTP)及它的钴铜锌三种金属卟啉,并用上述三种金属卟啉分别敏化锐钛矿型的二氧化钛,制备了CoTTP-TiO2,ZnTTP-TiO2,CuTTP-TiO2三种光催化剂,对这三种光催化剂进行了扫描电镜(SEM)、X射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-vis)、红外光谱(IR)的表征.在300 W汞灯和400 W金卤灯照射下,制备的光催化剂对4-硝基苯酚溶液的降解表现出比未修饰二氧化钛高的催化效率,光催化降解反应符合反应一级动力学方程.
【Abstract】 meso-5,10,15,20-Tetrakis(2-thienyl) porphyrin(H2TTP) and its corresponding Co(II),Cu(II),Zn(II) metalloporphyrins were synthesized,then we used metalloporphyrins as photosensitizer,corresponding pohotocatalysts(CoTTP-TiO2,CuTTP-TiO2,ZnTTP-TiO2) were prepared and characterized by SEM,XPS,diffuse reflectance,FT-IR(KBr).The photocatalytic activity of photocatalysts were investigated by the experiment of photodegradation of 4-nitrophenol(4-NP) in aqueous solution using 300 W high-pressure mercury lamp and 400 W metal halide lamp as light source respectively.These photocatalysts have higher photocatalytic activity compared with bare titanium dioxide,and the photocatalytic reaction accords with the first-order kinetic equation.
【Key words】 thienyl-appended porphyrin； metalloporphyrin； titanium dioxide； photocatalytic degradation； 4-nitrophenol；
- 【文献出处】 化学学报 ,Acta Chimica Sinica , 编辑部邮箱 ,2011年23期
- 【分类号】O614.411;O643.36
- 【被引频次】12
- 【下载频次】482