Monodisperse AgO hollow porous microsphere and preparation method and application thereof
A porous microsphere, monodisperse technology, applied in the preparation of this material, in the field of monodisperse AgO hollow porous microspheres, can solve the problem of inability to be monodisperse, low specific surface area of AgO materials, inability to prepare monodisperse AgO hollow porous microspheres, etc. problem, to achieve the effect of environmental protection, low price and low preparation cost
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Embodiment 1
[0040] Step 1, prepare the silver nitrate solution of 100mL 0.185mol / L, then add dropwise the first sodium hydroxide solution of 4.5mL 5mol / L in the above-mentioned silver nitrate solution to form a precipitate, add the ammoniacal liquor of 5mol / L to the above-mentioned precipitate The above precipitate was dissolved and then washed with HNO 3 Solution adjustment pH value is 4, obtains silver ammonia solution;
[0041] Step 2, add 2g of fumed silica to the silver ammonia solution and stir it rapidly for 1h, then centrifuge to obtain the fumed silica and supernatant containing silver ions, and redisperse the above-mentioned gas phase containing silver ions with 50mL deionized water Silica, obtain the first suspension; Adopt atomic absorption spectrophotometer to measure the silver ion concentration of supernatant liquid, calculate the molar weight n (Ag of the silver ion that gas phase silica absorbs) + 吸附 ) is 0.0185mol;
[0042] Step 3, weigh 0.0185 mol of sodium chloride,...
Embodiment 2
[0048] Step 1, prepare the silver nitrate solution of 100mL 0.200mol / L, then add the first sodium hydroxide solution of 5mL 5mol / L dropwise in the above-mentioned silver nitrate solution to form a precipitate, add 5mol / L ammonia water to the above-mentioned precipitate to dissolve the above-mentioned The precipitate was dissolved and then washed with HNO 3 Solution adjustment pH value is 4, obtains silver ammonia solution;
[0049] Step 2, add 3g of fumed silica to the silver ammonia solution and stir rapidly for 1.5h, then centrifuge to obtain the fumed silica and supernatant containing silver ions, and redisperse the above-mentioned silver ion-containing silica with 50mL deionized water Fumed silica, obtain the first suspension; Adopt atomic absorption spectrophotometer to measure the silver ion concentration of supernatant, calculate the molar weight n (Ag + 吸附 ) is 0.02mol;
[0050] Step 3, weigh 0.02mol of sodium chloride, prepare a sodium chloride solution with a conc...
Embodiment 3
[0055] Step 1, prepare the silver nitrate solution of 100mL 0.215mol / L, then the first sodium hydroxide solution of 5.5mL 5mol / L is added dropwise in the above-mentioned silver nitrate solution to form a precipitate, and the ammoniacal liquor of 5mol / L is added in the above-mentioned precipitate The above precipitate was dissolved and then washed with HNO 3 Solution adjustment pH value is 6, obtains silver ammonia solution;
[0056] Step 2, add 4g of fumed silica to the silver ammonia solution and stir rapidly for 1.5h, then centrifuge to obtain the fumed silica and supernatant containing silver ions, and redisperse the above-mentioned silver ion-containing silica with 50mL deionized water Fumed silica, obtain the first suspension; Adopt atomic absorption spectrophotometer to measure the silver ion concentration of supernatant, calculate the molar weight n (Ag + 吸附 ) is 0.0215mol;
[0057] Step 3, weigh 0.0215mol of sodium chloride, prepare a sodium chloride solution with a...
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