Method of preparing single crystal La(OH)3 nano-rod having high specific surface area

The invention disclose a preparation method of a monocrystal La(OH)3 nanometer rod with high specific surface area, belonging to the preparation field of a single dimension nanometer inorganic material, and aiming at solving the problems of severe preparation condition, poor crystallinity, small specific surface area and the like in the existing method for preparing the La(OH)3 nanometer rod. The method comprises the steps of: under stirring and water bath heating at 25-80 DEG C, dissolving the soluble salt of La in propanol and water with volume ratio of 1-4:1, adding precipitator ammonia for generating precipitate, after continually stirring for 3-5min, transferring the mixture to 0 DEG C environment and carrying out constant temperature treatment for 72-280h, then filtering, washing with deionized water and drying to obtain the La(OH)3 nanometer rod. The method has the advantages of simple operation, strong controllability, high product yield, good crystallinity, unity appearance, large specific surface ar