锌、镉掺杂纳米级钛酸铅的制备及对活性翠蓝的光催化降解

Preparation of Zn, Cd Doped Nanosize PbTiO_3 Powders and Their Application in Photocatalytic Degradation of Dyestuff

由草酸氧钛 ,柠檬酸 ,乙酸铅和乙酸锌或草酸镉 ,用 sol-gel法制得掺杂 Zn( )、Cd( )的钛酸铅纳米材料 ,并用 XRD、TEM等对其结构和形貌进行了表征 .掺杂钛酸铅对水溶性活性翠蓝染料的光催化降解活性比同法制备的纯 Pb Ti O3纳米粉要高 ;Zn( )和 Cd( )的掺杂摩尔分数各为 5%时活性最高 .掺杂Zn( )的催化剂的活性优于掺杂 Cd( )的催化剂 .产品在 p H<1 0的范围内 ,有较好的催化活性 .

The Zn(Ⅱ) and Cd(Ⅱ) doped nanosize PbTiO 3 powders have been prepared by a sol-gel method from titanium oxyoxalate, citric acid, lead acetate, zine acetate or cadmium oxalate and characterized by XRD and TEM. Their catalytic activities for photocatalytic degradation of reactive turquoise blue K-GL was found to be greater than that of pure PbTiO 3 powder, whereas the PbTiO 3 doped with 5%(mole fraction) of Zn(Ⅱ) and Cd(Ⅱ) showed the greatest catalytic activity. The activity of Zn(Ⅱ) doped PbTiO 3 is higher than that of Cd(Ⅱ) doped one, likely due to the small radius of zinc ion which induced distortion of the lattice. The optimum pH value of the solution for photodegradation appeared less than 10.