掺杂纳米Bi2WO6的水热合成及其光催化性能研究

采用水热法合成了掺杂纳米Bi₂WO₆，以罗丹明B为目标降解物，研究了样品在可见光下的光催化性能。采用XRD测试了合成样品的晶体结构，采用BET法测试了合成样品的比表面积，实验结果表明适当浓度的Pb²⁺、Sr³⁺和Zr⁴⁺离子对纳米Bi2WO6的掺杂均能提高其催化性能，其中掺杂Pb²⁺、Zr⁴⁺更有效，且Pb²⁺在1%掺杂时效果最好，Zr⁴⁺在0.5%掺杂时效果最好。而且，光催化剂在光催化过程中性能稳定，不产生光腐蚀，并具有一定的吸附性能。

Photocatalytic properties of nanosized doped Bi2WO6 catalystssynthesized via a hydrothermal process

Nano-Bi₂WO₆ powders doped with different types of ions have been synthesized by hydrothermal method. The photoactivities under visible light of the as prepared samples for the rhodamine-B were investigated systematically. The as-prepared samples were characterized by X-ray diffraction, brunauer-emmet-teller surface area. Different types and concentrations of ions were doped. It is found that various doping could improve the catalytic properties, and Pb²⁺and Zr⁴⁺ were more active. The results revealed that 1% Pb²⁺ and 0.5% Zr⁴⁺ doping exhibited the highest photochemical activity under visible-light irradiation. In order to provide the basis for further application of Bi₂WO₆. The photoactivity of the catalyst in relationship with stabilization and absorption of catalyst, was also discussed. The catalyst is stable and adsorptional.