Preparation method of Zn2Ti3O8 aerogel
A technology of airgel and composite sol, which is applied in the field of preparation of nanoporous materials, can solve the problems of few synthesis reports, and achieve the effects of convenient operation, high success rate and high porosity
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example 1
[0030] Weigh 0.011mol zinc acetate and add it to 20mL ethanol, stir until completely dissolved to obtain solution A; take 6.4mL tetrabutyl titanate and 0.4mL concentrated hydrochloric acid and add it to 32mL ethanol, stir for a while to obtain solution B; pour solution A into solution B, stirred for 30 min, and then added dropwise 1.5 mL of deionized water to obtain a zinc titanate precursor composite sol.
[0031] The zinc titanate precursor composite sol obtained in the above steps was poured into a mold, placed in an oven at 60° C. to gel for 6 hours, and then solvent replacement and aging were performed with ethanol for 1 day to obtain a zinc titanate precursor composite gel. by CO 2 Supercritically dried, then calcined for 3 hours at 600°C and 3°C / min heating rate under nitrogen atmosphere, and finally Zn 2 Ti 3 o 8 airgel.
[0032] Prepared Zn 2 Ti 3 o 8 The XRD pattern of the airgel is as follows figure 1 As shown, there are 7 obvious characteristic peaks at the...
example 2
[0034] Weigh 0.016mol zinc acetate and add it to 20mL ethanol, stir until completely dissolved to obtain solution A; take 6.4mL tetrabutyl titanate and 0.5mL concentrated hydrochloric acid and add it to 32mL ethanol, stir for a while to obtain solution B; pour solution A into solution B, stirred for 30 min, and then added dropwise 1.28 mL of deionized water to obtain a zinc titanate precursor composite sol.
[0035] Pour the zinc titanate precursor composite sol obtained in the above steps into a mold, place it in an oven at 25°C for 6 hours, then use ethanol for solvent replacement and aging for 3 days, and replace the aging solution every 12 hours to obtain zinc titanate Precursor composite gel. by CO 2 Supercritically dried, then calcined for 3 hours at 700°C and 3°C / min heating rate in an air atmosphere, and finally Zn 2 Ti 3 o 8 airgel.
[0036] Prepared Zn 2 Ti 3 o 8 The airgel glue presents a three-dimensional network structure with a rich pore structure and a s...
example 3
[0038] Weigh 0.022mol of zinc acetate and add it to 20mL of ethanol, stir until completely dissolved to obtain solution A; take 5.5mL of tetrabutyl titanate and 0.4mL of concentrated nitric acid and add it to 32mL of ethanol, stir for a while to obtain solution B; pour solution A into solution B, stirred for 30 min, and then added dropwise 2 mL of deionized water to obtain a zinc titanate precursor composite sol.
[0039] Pour the zinc titanate precursor composite sol obtained in the above steps into a mold, place it in a 30°C oven to gel for 10 hours, then use ethanol for solvent replacement and aging for 3 days, and replace the aging solution every 24 hours to obtain zinc titanate Precursor composite gel. Dry by supercritical ethanol, and then calcined for 3.5h at 630°C and 4°C / min heating rate under nitrogen atmosphere, and finally Zn 2 Ti 3 o 8 airgel.
[0040] Prepared Zn 2 Ti 3 o 8 The airgel presents a three-dimensional network structure with rich pore structure ...
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