Preparation method of magnesium hydroxide nanotube
A technology of magnesium hydroxide and nanotubes, which is applied in the field of preparation of magnesium hydroxide nanotubes, can solve the problems of complicated preparation steps and low cost of magnesium hydroxide nanotubes, and achieves large-scale industrial production, low cost and high efficiency. Effect
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[0023] The preparation method of the magnesium hydroxide nanotube of the present application is carried out according to the following steps:
[0024] (1) put alkali source and magnesium source into the polytetrafluoroethylene hydrothermal kettle, and after stirring, the hydrothermal reactor is sealed in the stainless steel autoclave;
[0025] (2) Fix the stainless steel autoclave in the homogeneous reactor, react at high temperature for a certain period of time, the reaction temperature is 100-300°C, the reaction time is 12-60h, and the reaction speed is 5-200rpm;
[0026] (3) After being naturally cooled to room temperature, the product of (2) was centrifuged, washed with water and ethanol three times, and dried for a certain period of time to obtain magnesium hydroxide nanotubes. The drying temperature was 40 to 100 ° C, and the drying time was 2 ~48h.
[0027] The alkali source is one or a mixture of two or more of sodium hydroxide, potassium hydroxide or ammonia water. ...
Embodiment 1
[0030] Experimental procedure: Weigh 1.56 g of sodium hydroxide into a polytetrafluoroethylene hydrothermal kettle, add 30 mL of deionized water and stir evenly, then add 1.5 g of magnesium oxide, mix evenly, and seal it in a stainless steel autoclave. The reaction was then carried out in a homogeneous reactor for 60 hours at a reaction temperature of 100° C. and a rotational speed of 200 rpm. After the reaction was completed, the product was naturally cooled to room temperature, and the product was centrifuged, washed with water and ethanol three times each, and dried at 100° C. for 2 hours to obtain magnesium hydroxide nanotubes. Its typical X-ray powder diffraction pattern is shown in figure 1 As shown, it was confirmed to be magnesium hydroxide; its typical TEM image is shown in figure 2 As shown, the nanotube morphology was confirmed, which, in combination, indicated that magnesium hydroxide nanotubes were successfully prepared. According to this embodiment, the obtain...
Embodiment 2
[0032] Experimental procedure: Weigh 2.18 g of potassium hydroxide into a polytetrafluoroethylene hydrothermal kettle, add 30 mL of deionized water and stir evenly, then add 2.1 g of magnesium carbonate, mix evenly, and seal it in a stainless steel autoclave. Subsequently, the reaction was carried out in a homogeneous reactor for 12 hours at a reaction temperature of 300° C. and a rotational speed of 5 rpm. After the reaction was completed, the product was naturally cooled to room temperature, and the product was centrifuged, washed with water and ethanol three times each, and dried at 40° C. for 48 hours to obtain magnesium hydroxide nanotubes. Its typical X-ray powder diffraction pattern is shown in figure 1 A typical TEM image is shown in image 3 shown. According to this embodiment, the obtained nanotubes have a length of 200-500 nm, an outer diameter of 15-35 nm, and an inner diameter of 5-15 nm.
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