Abstract:

The preparation of bismuth vanadate yellow pigment by the liquid-phase precipitation method using Bi(NO₃)₃ and NH₄VO₃ as raw materials is recommended as an inorganic chemistry experiment. Students are required to obtain small and uniform BiVO₄ yellow pigment particles with good dispersity by controlling the initial concentration of reactants, the pH of solution, the reaction temperature and duration. The experimental procedures involve solution preparation, heating, stirring, simple reflux, temperature and pH control, ion test, the suction filtration, washing and drying. Bismuth vanadate not only is a kind of green environmental protection yellow pigment, but also has the photocatalytic performance to degrade pollutants. Therefore, the experiment not only is beneficial to the improvement of students' preparation ability in inorganic chemistry experiment, but also imparts the environmental education in the experimental teaching.

Key words: Bismuth vanadate, Yellow pigment, Inorganic chemistry experiment, Green environmental protection