Preparation method of indium tin oxide nanopowder

The invention discloses a preparation method of indium tin oxide nanopowder. The preparation method comprises the following steps: (1), dissolving tin salt into an ethanol solution, and performing ultrasonic oscillation at room temperature for 10-20 minutes to obtain a solution A; dissolving indium salt into an acetylacetone solution, and performing ultrasonic oscillation at room temperature for 5-10 minutes to obtain a solution B; (2), mixing the solution A with the solution B, adding alkali while stirring to adjust the pH of the solution to 7.5-8.5, then adding diethanolamine, then heating to 45-65 DEG C, and carrying out a reaction for 5-8 h to obtain a precipitate precursor; (3), washing, drying and calcining the precipitated precursor to obtain the indium tin oxide nanopowder. The indium tin oxide nanopowder prepared according to the preparation method provided by the invention is uniform in particle size distribution, obvious in particle boundaries, good in dispersion, free of agglomerates and good in c