Fe-doped hydroxyapatite nano-cage material and preparation method and adsorption method thereof
A hydroxyapatite, nano-cages technology, applied in nanotechnology, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve problems such as hollow structure collapse
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[0040] like figure 1 As shown, the first aspect of the present invention is a preparation method of Fe-doped hydroxyapatite nanocage material, specifically comprising the following steps:
[0041] S110, dissolving the mono-alkyl phosphate salt in a mixed solvent composed of water and ethanol to obtain a first mixed solution, adding ammonia water to adjust the pH to 8-10 to form a mono-alkyl phosphate salt solution;
[0042] S120. Stir and reflux the mono-alkyl phosphate ester salt solution at 40°C to 80°C, then mix it with a predetermined metal ion aqueous solution to obtain a second mixed solution, and further stir and reflux the second mixed solution at 40°C to 80°C ;
[0043] S130, adding the phosphorus source compound aqueous solution into the second mixed solution until the predetermined molar ratio of metal ions to phosphorus ions is 1.67 to obtain a third mixed solution, adjusting the pH and volume of the third mixed solution to form a total mixed solution;
[0044] S...
Embodiment 1
[0048] 0.06 mol monododecyl phosphate potassium salt (MDP-K) was dissolved in a mixed solvent composed of 45 ml water and 10 ml ethanol, and ammonia water was added to adjust the pH value of the mixed solution to 9. After stirring and refluxing at 60°C for 1 h, the MDP-K solution was mixed with a certain amount of metal ions (Ca 2+ and Fe 2+ ) aqueous solution (0.139mol of Ca(NO 3 ) 2 4H 2 O and 0.028mol of FeCl 2 4H 2 A mixture of O dissolved in 35ml of water, Fe 2+ / Ca 2+ The molar ratio is about 0.2) mixing. The mixture was further stirred and refluxed at 60° C. for 1 h, and then 0.04 mol (NH4 ) 2 HPO 4 Aqueous solution was added to the above mixture, so that (Ca 2+ +Fe 2+ ) / P 5+ The molar ratio was 1.67, and then the pH of the resulting mixed solution was adjusted to 9 by adding ammonia water, and finally the total solution volume was adjusted to 150ml, so that the MDP-K concentration was 400mmol / L. The mixture was then stirred, refluxed at 60 °C for 48 h, and...
Embodiment 2
[0050] 0.06 mol of MDP-K was dissolved in a mixed solvent composed of 45 ml of water and 10 ml of ethanol, and ammonia water was added to adjust the pH value of the mixed solution to 9. After stirring and refluxing at 60°C for 1 h, the MDP-K solution was mixed with a certain amount of metal ions (Ca 2+ ) aqueous solution (0.167 moles of Ca(NO 3 ) 2 4H 2 O dissolved in 35ml water, Fe 2+ / Ca 2+ The molar ratio is about 0) mixing. The mixture was further stirred and refluxed at 60°C for 1 h, and then 0.04 moles (NH 4 ) 2 HPO4 aqueous solution is added to the above mixed solution to make Ca 2+ / P 5+ The molar ratio was 1.67, and then the pH of the resulting mixed solution was adjusted to 9 by adding ammonia water, and finally the total solution volume was adjusted to 150ml, so that the MDP-K concentration was 400mmol / L. The mixture was then stirred, refluxed at 60 °C for 48 h, and the final product was centrifuged and washed three times with water and ethanol. The result...
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