【摘要】 该文介绍了一个BiVO₄粉体的制备与表征综合性实验。基于化学沉淀法制备BiVO₄光催化剂粉体,对其晶体结构、形貌和粒度分布进行表征,研究了其光催化性能。所制得的样品为单斜白钨矿结构,形貌呈圆球形颗粒,粒度分布均匀,样品对甲基橙的光催化降解符合一级反应动力学规律。实践表明,该实验路线简单易行,制备条件温和,涵盖知识点多,综合了无机化学、材料制备、结构表征和性能检测等基本实验技能,且设备和操作简单,具有良好的教学效果,可作为材料科学与工程专业的综合性实验项目。更多还原

【Abstract】 This paper introduced a comprehensive experiment on the preparation and characterization of the BiVO₄ powder.BiVO₄ photocatalysts powder were prepared by the chemical precipitation method and characterized about their crystal structure,morphology,particle size distribution and photocatalytic activity. The results show that the BiVO₄ samples with spherical particles are monoclinic sheelite structure. The particle size distribution is relatively uniform. The photocatalytic degradation of methyl orange over BiVO₄ was in accordance with the first order reaction kinetics. This experiment with simple route includes a lot of knowledge and covers many basic experimental skills such as synthesis,structural characterization and performance test. Moreover,it is easy for students to learn and operate,thus it can be applied as a comprehensive experiment of practical teaching course of material science and engineering major.更多还原