γ-Bi_2MoO_6光催化降解次甲基蓝的研究

Photocatalytic degradation of methylene blue on bismuth molybdate

以Bi(NO_3)_3·5H_2O和(NH_4)_6Mo_7O_(24)·4H_2O为原料,水热法合成Bi_2MoO_6粉体,采用X-射线衍射、紫外可见漫反射光谱仪对其进行表征。以次甲基蓝溶液为目标降解物,评价了Bi_2MoO_6催化剂的光催化活性。考察了光催化剂的制备反应温度、pH值以及焙烧温度、催化剂用量等对光催化反应效果的影响,确定了Bi_2MoO_6粉体的最佳制备条件。结果显示:在160℃,pH=8的条件下水热反应4h,并在160℃干燥所制得的催化剂对次甲基蓝的降解效果最佳,其脱色率可达到90%。

Bi2MoO 6 nanopowders were prepared by hydrothermal method using Bi（ NO 3 ） 3 · 5 H 2O and（ N H 4 ） 6M o 7O 24 · 4 H2O as raw materials. X-ray diffraction and Ultraviolet visible diffuse reflectance spectrometer was used to characterize the BigMoOepow- ders. The photocatalytic performance of Bi2MoO 6 nanopowders were evaluated by the degradation of methylene blue. The results showed that the preparation conditions of Bi2MoO 6 nanopowders such as heating temperature,p H valune,calcination temperature as well as the catalysts dosage had influence on photodegration of methylene blue. The optimal preparation conditions of the Bi2M o O 6 nanopowders were obtained at 160℃,pH value of 8 and dried at 160℃ with the best degradation rate of methylene blue up to 90%