【摘要】 应用水热法,以钼酸铵、硝酸铋为原料,研究水热反应时间对制得的Bi₂MoO₆晶体的光催化效果影响。采用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、比表面积分析仪（BET）、X射线光电子能谱仪（XPS）和紫外-可见漫反射（UV-Vis DRS）对制得的样品进行表征。结果表明:反应时间对Bi₂MoO₆晶体的物相组成、形貌以及光催化性能均有影响。在可见光（λ≥420 nm）照射下,通过光催化降解罗丹明B（Rhodamine B,Rh B）的实验可以探知反应时间对制得的Bi₂MoO₆晶体的光催化活性的影响。当反应时间为16 h时,所制得的样品为纯相Bi₂MoO₆,其光催化效果也最好;在可见光照射下50 min后对初始浓度为5 mg·L-1的罗丹明B溶液的降解率为85%。更多还原

【Abstract】 Bi₂MoO₆ crystallite was prepared by hydrothermal synthesis method using bismuth molybdate（Bi2 Mo O6）,bismuth nitrate,citric acid as raw materials.The samples were characterized by XRD,SEM,BET,XPS and UV-Vis DRS.The result show that:the phase composition,morphology and photocatalytic performance of the Bi2 Mo O6crystallites are affected by reaction time.The effect of reaction time on photocatalytic activity of Bi2 Mo O6is determined by photocatalytic degradation of the Rh B under visible light（λ≥420 nm）.The best reaction time of Bi2 Mo O6is determined at 16 h has an optimal photocatalytic effect.The degradation rate of the initial concentration of5 mg·L-1Rh B is 85% after under the visible light irradiation for 50 min.更多还原