金属酞菁敏化二氧化钛可见光催化降解染料废水的研究

研究了染料敏化半导体光催化剂-酞菁镁/TiO_2复合粒子在可见光波段的光催化性能.通过溶胶-凝胶的方法制得TiO_2胶体再进行焙烧,得到二氧化钛粉末和薄膜,再用酞菁镁敏化,制得酞菁镁/TiO_2复合粒子.利用X射线衍射、扫描电子显微镜、红外光谱和X光电子能谱分析等方法对TiO_2和酞菁镁/TiO_2复合粒子的物理性质进行了表征;并以亚甲基蓝作为目标物研究其光催化性能.结果表明,酞菁镁可以敏化二氧化钛,使其吸收波长红移,并具有较好的光催化性能.

Research of Metal Phthalocyanine-sensitized Titanium Dioxides Visible Light Photocatalytic Degradation of Dye Wastewater

The magnesium phthalocyanine/TiO_2 composite particle is one of the dye-sensitized semiconductor photocatalyst which can response to visible light bands.The performance of photocatalytic degradation of dye wastewater was studied in the present paper.Through the sol - gel method was prepared to conduct colloidal TiO_2 calcination,the titanium dioxide powder and film,and then was sensitized by Mg-phthalocyanine, magnesium phthalocyanine/TiO_2 composite particles was prepareed.The properties of the TiO_2 and magnesium phthalocyanine/TiO_2 composite particles were studied by X-ray diffraction,scanning electron microscopy, infrared spectroscopy and X-ray photoelectron spectroscopy analysis.The Photo- catalytic activity of titanium dioxide was evaluated using the photooxidation of methylene blue as testing reaction.The results showed that Mg-phthalocyanine can sensitize TiO_2 and make its absorption wavelength red shift.