Binary hydroxide nanotube with composite structure and preparation method thereof
A technology of hydroxide and composite structure, which is applied in the direction of magnesium hydroxide, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve problems such as the inability to use industrial mass production processes, and achieve easy amplification, Prepare simple effects
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Embodiment 1
[0028] The preparation method of cadmium hydroxide and magnesium hydroxide composite nanotubes is as follows:
[0029] A. Take 1.5g of magnesium oxide and 0.4g of magnesium sulfate, add it to an ammonia solution with a concentration of 5.8mol / L, and place it in a homogeneous reactor at 300°C and 5rpm for 12h hydrothermally. The magnesium hydroxide nanotube template can be obtained by centrifugal washing and drying.
[0030] B. With Cd(Ac) 2 For Cd salt, ion exchange was performed at a molar ratio of Cd:Mg=1:1. Accurately weigh 1.83g Cd(Ac) 2 Dissolve in deionized water, then add 0.4 g Mg(OH) 2 template, stirred at room temperature for 60h, filtered and dried to obtain cation-exchanged nanotubes.
[0031] C. The nanotubes prepared in step B were placed in a 0.1 mol / L NaOH solution, stirred at room temperature for 1 h, filtered and dried to obtain binary hydroxide nanotubes.
[0032] The ratio of cadmium hydroxide and magnesium hydroxide composite nanotubes prepared in this...
Embodiment 2
[0034] The preparation method of cadmium hydroxide and magnesium hydroxide composite nanotubes is as follows:
[0035] A. Take 6g of magnesium chloride and add it to the potassium hydroxide aqueous solution, the concentration is 0.6mol / L. It was placed in a homogeneous reactor at 100°C and 200rpm for 60h of hydrothermal treatment. The magnesium hydroxide nanotube template can be obtained by centrifugal washing and drying.
[0036] B. With CdCl 2 For Cd salt, ion exchange was performed at a molar ratio of Cd:Mg=3:1. Accurately weigh 4.70g CdCl 2 Dissolve in deionized water, then add 0.4 g Mg(OH) 2 template, stirred at room temperature for 1 h, filtered and dried to obtain cation-exchanged nanotubes.
[0037] C. The nanotubes prepared in step B were placed in a 0.5 mol / L NaOH solution, stirred at room temperature for 3 hours, filtered and dried to obtain binary hydroxide nanotubes.
[0038] The ratio of cadmium hydroxide and magnesium hydroxide composite nanotubes prepared...
Embodiment 3
[0040] The preparation method of cadmium hydroxide and magnesium hydroxide composite nanotubes is as follows:
[0041]A. Take 3.0g of magnesium carbonate and add it to the mixed alkali aqueous solution of sodium hydroxide and potassium hydroxide, and the concentrations are 0.1mol / L and 1.5mol / L respectively. It was placed in a homogeneous reactor at 200° C. and 120 rpm for 36 hours of hydrothermal treatment. The magnesium hydroxide nanotube template can be obtained by centrifugal washing and drying.
[0042] B. Take CdSO 4 For Cd salt, ion exchange was performed at a molar ratio of Cd:Mg=1:1. Accurately weigh 1.76g CdSO 4 Dissolve in deionized water, then add 0.4 g Mg(OH) 2 template, stirred at room temperature for 48h, filtered and dried to obtain cation-exchanged nanotubes.
[0043] C. The nanotubes prepared in step B were placed in a mixed solution of 0.7 mol / L NaOH and 0.3 mol / L KOH, stirred at room temperature for 6 h, filtered and dried to obtain binary hydroxide na...
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