Method for preparing polyhedral tungsten trioxide by using template
A tungsten trioxide and polyhedron technology, applied in tungsten oxide/tungsten hydroxide, pressure vessels used in chemical processes, etc., can solve the problems of expensive precursors, easy to destroy sol structure, easy to explode, etc., to reduce the phenomenon of agglomeration , the effect of shortening the reaction time and low cost
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Embodiment 1
[0030] Put the solution containing 10mL of 80% hydrazine hydrate in a 50mL reaction kettle, and then add 20mL of toluene solution containing 0.035mol / L iron acetylacetonate and 1mL of oleic acid to form a two-phase reaction system. Put it into a 130°C oven, take it out after 24h and let it cool down to room temperature naturally. The poured mixed solution was added to ethanol for ultrasonication, and under the action of a magnet, it was repeatedly washed with ethanol until the solution was partially clear, and dried at room temperature. Weigh 3mmol sodium tungstate dihydrate into 30mL deionized water, stir continuously until it is completely dissolved, adjust the pH between 4-5 with 1mol / L HCl, add the prepared ferric oxide, mix and place in 50mL for reaction React in the kettle at 160°C for 6 hours. After cooling, the solid part of the kettle is washed with deionized water and dried. Soak the resulting solid in 2mol / L hydrogen chloride solution for 3 days.
Embodiment 2
[0032] A solution containing 10 mL of 80% hydrazine hydrate was placed in a 50 mL reaction kettle, and a two-phase reaction system formed by adding 20 mL of a toluene solution containing 0.035 mol / L iron acetylacetonate and 1 mL of oleic acid in sequence, without stirring during the whole process , the reactor was placed in an oven at 130 °C, and after 12 h, it was taken out and cooled to room temperature naturally. The poured mixed solution was added to ethanol for ultrasonication, and under the action of a magnet, it was repeatedly washed with ethanol until the solution was partially clear, and dried at room temperature. Weigh 3 mmol of sodium tungstate dihydrate into 30 mL of deionized water, stir continuously until it is completely dissolved, adjust the pH between 4-5 with 1 mol / L HCl, add the prepared ferric oxide, mix and place React in a 50 mL reactor at 160 °C for 12 h. After cooling, the solid part of the kettle was washed with deionized water and dried. Soak the res...
Embodiment 3
[0034] A solution containing 20 mL of 80% hydrazine hydrate was placed in a 100 mL reaction kettle, and a two-phase reaction system formed by adding 40 mL of a toluene solution containing 0.07 mol / L iron acetylacetonate and 2 mL of oleic acid in sequence, without stirring during the whole process , the reactor was placed in an oven at 130 °C, and after 24 h, it was taken out and cooled to room temperature naturally. The poured mixed solution was added to ethanol for ultrasonication, and under the action of a magnet, it was repeatedly washed with ethanol until the solution was partially clear, and dried at room temperature. Weigh 6 mmol of sodium tungstate dihydrate in 60 mL of deionized water, stir continuously until completely dissolved, and add 1 mol / L of H 2 SO 4 Adjust the pH between 4-5, add the prepared ferric oxide, mix and place it in a 100 mL reactor at 160 °C for 10 h. After cooling, the solid part of the kettle is washed with deionized water and dried. Soak the re...
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