Method for preparing silicon oxide nanofiber
A nanofiber and silicon oxide technology, applied in the field of nanomaterials, can solve the problems of many nanowire products, poor flexibility, high synthesis temperature, etc., and achieve good product reproducibility, convenient and efficient preparation method, and high purity Effect
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[0030] Example 1
[0031] Weigh 3.75 grams of SiO with a mass fraction of 30% 2 Silica sol (alkaline), add 37.5 ml of distilled water. After stirring and ultrasonically dispersed uniformly, 15.14 grams of Fe (NO 3 ) 3 .9H 2 O (ferric nitrate nonahydrate) was added to the silica sol aqueous solution and stirred for 15 minutes until the ferric nitrate was completely dissolved.
[0032] Subsequently, the above solution was slowly added dropwise to a flask containing 60 ml of ethylenediamine liquid, and magnetic stirring (500 rpm) was performed during the dropwise addition. After the dropwise addition of the solution was completed, the emulsion was stirred for 15 hours to fully mix the system to obtain a mixed solution.
[0033] The above mixed solution was transferred into a 150-milliliter polytetrafluoroethylene-lined stainless steel reaction kettle, and after being sealed, it was left to stand in an oven at 180 degrees Celsius for 4 days to conduct a hydrothermal reaction....
Example Embodiment
[0040] Example 2
[0041] Weigh 3.75 g of 30% alkaline SiO 2 Silica sol, add 37.5 ml of distilled water. After stirring and ultrasonically dispersed uniformly, weigh 6.36 grams of AgNO 3 (Silver nitrate) was added to the silica sol aqueous solution and stirred for 20 minutes until the silver nitrate was completely dissolved.
[0042] Subsequently, the above solution was slowly added dropwise to a flask containing 60 ml of ethylenediamine liquid, and magnetic stirring (500 rpm) was performed during the dropwise addition. After the dropwise addition of the solution was completed, the emulsion was stirred for 12 hours to fully mix the system to obtain a mixed solution.
[0043] The above mixed solution was transferred into a 150-milliliter polytetrafluoroethylene-lined stainless steel reaction kettle, and after being sealed, it was left standing in an oven at 170 degrees Celsius for 4 days.
[0044] After the reaction was completed, the autoclave was taken out and cooled to r...
Example Embodiment
[0047] Example 3
[0048] Weigh 15 grams of 30% alkaline SiO 2 Silica sol, add 150 ml of distilled water. After stirring and ultrasonically dispersed uniformly, 30 grams of Fe (NO 3 ) 3 .9H 2 O (ferric nitrate nonahydrate) was added to the silica sol aqueous solution and stirred for 30 minutes until the silver nitrate was completely dissolved.
[0049] Subsequently, the above solution was slowly added dropwise to a flask containing 240 ml of ethylenediamine liquid, and magnetic stirring (500 rpm) was performed during the dropwise addition. After the dropwise addition of the solution was completed, the emulsion was stirred for 15 hours to fully mix the system to obtain a mixed solution.
[0050] The above mixed solution was transferred into a 1 liter 1Cr18Ni9Ti specification high temperature and high pressure stainless steel reaction kettle, the pressure in the kettle was maintained at 2MPa, and the reaction was carried out at a temperature of 170 degrees Celsius for 3 day...
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