溶胶-凝胶法制备共掺杂负载型二氧化钛光催化剂

摘要

以钛酸丁酯为Ti源,采用溶胶�凝胶法合成了“不同金属-N”共掺杂的TiO2纳米粉体,比较了乙醇用量对酞酸四丁酯水解的影响,用紫外-可见光吸收光谱(UV�Vis)和 X 射线衍射(XRD)对掺杂型TiO2粉体的光催化活性和尺寸进行了表征。结果表明：凝胶时间按钛酸四丁酯与无水乙醇体积比的增大依次增加；单一金属掺杂的光催化剂光活性较多种金属更强,相较Mn2+,Cu2+,Fe3+,Al3+,Ba2+,Co2+与Fe3+,Co2+与N共掺杂TiO2粉体可见光活性最强。%Takingtetrabutyl titanate as Ti source,this paper synthesizes the'different metal-N'codoped TiO2 nano powder by sol-gel method,and compares the effects of alcohol’amount on phthalic acid ester hydrolysis.The photocatalytic activity and size of doped TiO2 powder are characterized by ultraviolet-visi-ble absorption spectroscopy (UV-Vis)and X-ray diffraction (XRD).The result shows that the gel time in turn increases with the increase of tetrabutyl titanate butyl and anhydrous ethanol volume ratio.The single metal doped light catalyst activity is stronger than that of various metals.Compared with Mn2+,Cu2+, Fe3+,Al3+,Ba2+,CO2+ and Fe3+,the CO2+ and N-Co doped TiO2 powder is the most active under condi-tion of visible�light.