Preparation method of oxide nanocrystal solid

[0018] A kind of preparation method of oxide nanocrystalline crystal of the present invention is made by following raw material and operating steps:

[0019] Step 1) Preparation of raw materials:

[0020] Metal cation solution: dissolving soluble high-valent metal salt in distilled water to form a metal cation solution with a concentration of 1-5mol / L; the soluble high-valent metal salt is selected from tin dichloride, tin tetrachloride, titanium trichloride, One of titanium tetrachloride, cerium ammonium nitrate, cerium chloride, cerium nitrate, cerium sulfate, cerium ammonium sulfate, and cerium acetate;

[0021] Metal oxide anion solution: dissolve soluble metal oxide anion salts such as molybdate, vanadate, and dichromate in distilled water to prepare a 0.1-25mol / L metal oxide anion solution; the soluble metal oxide The anion salt is one of ammonium molybdate, sodium molybdate, potassium molybdate, sodium vanadate, ammonium metavanadate, potassium dichromate, sodium dich

[0027] Embodiment 1: Preparation method of oxide nanocrystalline crystal optoelectronic material

[0028] Using SnCl 4 ·5H 2 O and (NH 4 ) 6 Mo 7 o 24 4H 2 O is the raw material, and the calcination temperature is 400°C. Weigh 9.0202g SnCl 4 ·5H 2 O and 4.5425g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 40ml dedistilled water respectively to obtain SnCl 4 solution and (NH 4 ) 6 Mo 7 o 24 solution, the two solutions were mixed to obtain a stable and transparent mixed solution. Add ammonia water to adjust the pH value to 5 to form a milky white colloidal precipitate, react for half an hour, centrifuge, wash with distilled water three times, dry in an oven at 120°C, and then bake in a muffle furnace at 400°C for 2 hours to obtain the product. From SnO 2 / MoO 3 X-ray powder diffraction spectrum of nanocrystalline crystals, SnO 2 / MoO 3 Small angle X-ray powder diffraction patterns of nanocrystalline crystals and SnO 2 / MoO 3 The TEM pictures of SnO can

[0033] Example 2: Preparation method of oxide nanocrystalline crystal optoelectronic material

[0034] Using TiCl 3 and (NH 4 ) 6 Mo 7 o 24 4H 2 O is the raw material, and the calcination temperature is 300°C. Weigh 42.4468g TiCl 3 The solution was dropped into 20ml of 15% H 2 o 2 , and then weighed 7.2516g (NH 4 ) 6 Mo 7 o 24 4H 2 Dissolve O in 60ml of distilled water, mix the above two solutions to obtain a stable and transparent mixed solution, adjust the pH to 5 with ammonia water, form a yellow colloidal precipitate, stir and react for half an hour, centrifuge, wash with distilled water three times, and put it in an oven at 120°C Dry to get the product. The product has been characterized by X-ray diffraction and transmission electron microscope: TiO 2 The nano crystals are formed and arranged in an orderly manner, and the size is 2-3 nanometers. It is proved by the fluorescence spectrophotometer test that the material has fluorescent properties.