Preparation method of porous ZnO block material
A bulk material and volume technology, applied in the field of materials, can solve the problems of long preparation cycle, high cost and complex process, and achieve the effects of short preparation cycle, low cost and few process steps.
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Embodiment 1
[0019] A preparation method of porous ZnO bulk material, comprising the steps of:
[0020] (1) Dissolve citric acid in ammonia water, the amount of ammonia water is based on the amount of citric acid that can be dissolved, dissolve zinc acetate in the remaining citric acid solution, stir and dissolve to form solution A, wherein, zinc ion: citric acid (molar ratio) =1:0.8.
[0021] (2) Weigh a certain amount of dispersant (composed of ethylenediaminetetraacetic acid, citric acid, diethylenetriaminepentacarboxylic acid, tartaric acid, ethylene glycol, polyethylene glycol, wherein polyethylene glycol includes polyethylene glycol) Glycol 400, Polyethylene Glycol 4000 and Polyethylene Glycol 6000.) Add in solution A, the concentration of each component of dispersant is controlled at 0.6mol / L, then add dehydrated alcohol and stir to dissolve (the volume of dehydrated alcohol is 2 / 3 of the volume of ammonia water), and then adjust the pH value to 5-8 to obtain the precursor solution...
Embodiment 2
[0025] A preparation method of porous ZnO bulk material, comprising the steps of:
[0026] (1) Dissolve citric acid in ammonia water, the amount of ammonia water is based on the amount of citric acid that can be dissolved, dissolve zinc acetate in the remaining citric acid solution, stir and dissolve to form solution A, wherein, zinc ion: citric acid (molar ratio) =1:1.5.
[0027] (2) Weigh a certain amount of dispersant (composed of ethylenediaminetetraacetic acid, citric acid, diethylenetriaminepentacarboxylic acid, tartaric acid, ethylene glycol, polyethylene glycol.) Add in solution A, each dispersant The concentration of the components is controlled at 0.6 mol / L, then add absolute ethanol and stir to dissolve (the volume of absolute ethanol is equal to the volume of ammonia water), and then adjust the pH value to 5-8 to obtain the precursor solution.
[0028] (3) Put the precursor solution in a water bath at 80°C for 20-30 minutes, then dry at 140°C to form a xerogel, an...
Embodiment 3
[0031] A preparation method of porous ZnO bulk material, comprising the steps of:
[0032] (1) Dissolve citric acid in ammonia water, the amount of ammonia water is based on the amount of citric acid that can be dissolved, dissolve zinc acetate in the remaining citric acid solution, stir and dissolve to form solution A, wherein, zinc ion: citric acid (molar ratio) =1:1.
[0033] (2) Weigh a certain amount of dispersant (composed of ethylenediaminetetraacetic acid, citric acid, diethylenetriaminepentacarboxylic acid, tartaric acid, ethylene glycol, polyethylene glycol.) Add in solution A, each dispersant The concentration of the components is controlled at 0.01, 0.1, 0.1, 0.5, 0.6, 0.6mol / L, then add absolute ethanol and stir to dissolve (the volume of absolute ethanol is 2 / 3 of the volume of ammonia water), and then adjust the pH value to 5~ 8 to obtain the precursor solution.
[0034] (3) Put the precursor solution in a water bath at 85°C for 20-30min, then dry it at 150°C ...
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