摘要
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%。
Bi_2MoO_6 nanopowders were prepared by hydrothermal method using Bi(NO_3)_3·5H_2O and(NH_4)_6Mo_7O_(24)·4H_2O as raw materials.X-ray diffraction and Ultraviolet visible diffuse reflectance spectrometer was used to characterize the Bi_2MoO_6powders.The photocatalytic performance of Bi_2MoO_6nanopowders were evaluated by the degradation of methylene blue. The results showed that the preparation conditions of Bi_2MoO_6nanopowders such as heating temperature,pH valune,calcination temperature as well as the catalysts dosage had influence on photodegration of methylene blue.The optimal preparation conditions of the Bi_2MoO_6nanopowders were obtained at 160℃,pH value of 8 and dried at 160℃ with the best degradation rate of methylene blue up to 90%.
引文
[1]陈超,宋立民.可见光响应的铋系光催化剂研究进展[J].天津工业大学学报,2011,30(5):64-65.
[2]李红花,李坤威,汪浩.α-Bi2MO3O12和γ-Bi2MOO6的水热合成及可见光催化性能[J].无机化学学报,2009,3(25):512-516.
[3]李新玉,方艳芬,熊世威,等.钼酸铋光催化剂的制备及其光催化活性[J].环境科学,2013,(9):1611-1688.
[4]陈业,陈建林,姚三丽.Bi2MOO6可见光去除4BS染料科学实验研究[J].环境化学,2009,6(28):809-812.
[5]Rangel R.,Bartolo-Perez P,Gomez-Cortes A,et a1.Study of microstructure and catalytic activity ofγ-Bi2Mo O6and Bi2WO6compounds[J].Surf Rev Lett,2002,9:1779-1783.
[6]Buttrey D J,Vogt L White B D.High-temperature incommensurate-to-commensurate phase transition in the Bi2M o O6catalysts[J].J Solid State Chem,2000,155:206-215.
[7]张婷,黄剑锋,曹丽云,等.微波水热合成时间对Bi2Mo O6微晶形貌和可见光催化性能的影响[J].2013,41:710-714.
[8]Li H,Li K,Wang H.Hydrothermal synthesis and photocatalytic properties of bismuth molybdate Materials[J].Mater Chem Phys,2009,116:134-142.
[9]Yin W,Wang W,Sun S.Photocatalytic degradation of phenol over cage-like Bi2Mo O6hollow spheres under visiblelight irradiation[J].Catalysis Communications,2010,11:647-650.
