A kind of preparation method of the composite material containing cysteine and ferrous compound
A technology of cysteine and composite materials, which is applied in the preparation of composite materials containing cysteine and ferrous compounds and the preparation of environmentally friendly adsorption materials, which can solve the problems of low sulfhydryl content, complicated preparation process, and high production cost. problems to achieve good biocompatibility
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Embodiment 1
[0026] Embodiment 1: take by weighing 0.50g ferrous sulfate heptahydrate, 0.24g zinc nitrate hexahydrate, 0.25g salt of wormwood, and 0.2g oxalic acid dihydrate are dissolved in water respectively, obtain ferrous salt solution, zinc salt solution, carbon salt solution and oxalic acid solution. In addition, 1.0 g of cysteine was weighed and dissolved in 100 mL of water. At room temperature, under the protection of nitrogen and strong stirring, the five solutions of cysteine aqueous solution, ferrous salt solution, zinc salt solution, carbonate, oxalic acid solution, etc. Adjust the pH of the mixed solution to 5-5.5 with sodium until the precipitation of the mixed system is complete and the pH of the supernatant will not change. Afterwards, the precipitate was washed until the washing liquid was neutral, then dried and ground to obtain about 1.2 g of tan powdery composite material containing cysteine and ferrous compound.
[0027] In the XRD pattern of this product (see ...
Embodiment 2
[0028] Embodiment 2: take by weighing 0.25g ferrous chloride, 0.20g anhydrous zinc chloride, 0.36g oxalic acid, 0.13g malic acid and 0.42g sodium bicarbonate, dissolve in water respectively, obtain containing ferrous salt solution, containing zinc Salt solution, oxalic acid solution, malic acid solution and carbonate solution. In addition, 0.24g of cysteine was weighed, and 100mL of water was added to dissolve it. Firstly, mix ferrous salt solution with malic acid solution (solution A), and place under simulated sunlight; then mix cysteine solution, zinc salt solution, carbonate solution and oxalic acid solution (solution B) , then add solution A dropwise to solution B at 25°C under nitrogen protection and full stirring, and at the same time add dropwise sodium carbonate solution to keep the pH of the mixed system at 5.5-6.0 until the mixed system precipitates completely, and the supernatant pH no longer changes. Afterwards, the precipitate is washed until the washing li...
Embodiment 3
[0030]Embodiment 3: take by weighing 0.4g ferrous ammonium sulfate hexahydrate, 0.30g zinc sulfate heptahydrate, 0.02g tartaric acid and 0.4g ammonium bicarbonate, be dissolved in water respectively, obtain containing ferrous salt solution, containing zinc salt solution, tartaric acid solutions and carbonate solutions. In addition, 1.0 g of cysteine was weighed and dissolved in 100 mL of water. Mix ferrous salt solution, zinc salt solution, and tartaric acid solution to obtain solution A, and place it under sunlight; mix cysteine solution and carbonate solution to obtain solution B, and then at 15°C, nitrogen protection and Add solution A and solution B dropwise into the reactor at the same time under full stirring, keep the reaction temperature at 15°C, and at the same time add KOH or HNO3 dilute solution dropwise to adjust the pH to 7.5-8.0, until the mixed system precipitates completely, and the supernatant pH no longer changes. Afterwards, the precipitate was washed ...
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