Dye Removal Using pH-Tuned Magnetic Metal-Organic Frameworks
An organic framework, magnetic metal technology, applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of low adsorption capacity, single type of adsorbed dyes, and difficult recovery of adsorbents, etc. To achieve the effect of increasing adsorption capacity and good adsorption effect
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Embodiment 1
[0024] This embodiment is the preparation of magnetic metal-organic framework materials, including the following steps:
[0025] 1. Preparation of Fe by chemical co-precipitation method 3 o 4 : in N 2 Under the protection of 0.01mol FeCl 2 4H 2 O and 0.02mol FeCl 3 ·6H 2 O was dissolved in 100mL distilled water and mixed thoroughly under the action of magnetic stirring; the above solution was heated to 80°C, and 0.08mol NH 3 ·H 2 O, under the condition of 500rpm rotating speed, react for 1h; after the reaction is completed, separate by magnet, and wash repeatedly with distilled water until the solution is neutral, and finally vacuum dry to obtain Fe 3 o 4 ;
[0026] 2. Magnetic SiO 2 Preparation: get 0.5g of Fe prepared in step 1 3 o 4 Place in a three-necked flask, add 150mL of 50% ethanol aqueous solution, 3mL of NH 3 ·H 2 O and 5mL tetraethyl orthosilicate, reacted at 40°C and 300rpm for 24h; after the reaction was completed, the product was separated by a mag...
Embodiment 2
[0030] In this example, the magnetic metal-organic framework material is used as an adsorbent for the adsorption of anionic dye azo fluorescent pink in water samples, and the following steps are followed:
[0031] Adjust the pH of the water body to be treated containing the anionic dye azo fluorescent pink to 3, then add 100 mg of the magnetic metal-organic framework material prepared in Example 1 to 400 mL of the water body, stir at a stirring speed of 300 rpm for 10 min, and use a magnet to Magnetic separation, that is, to complete the dye removal treatment of the water body to be treated, and obtain the treated water body.
Embodiment 3
[0033] In this example, the magnetic metal-organic framework material is used as an adsorbent for the adsorption of cationic dye Victoria Blue B in water samples, and the following steps are followed:
[0034] Adjust the pH of the water to be treated containing the cationic dye Victoria Blue B to 11, then add 100 mg of the magnetic metal-organic framework material prepared in Example 1 to 400 mL of the water, stir for 30 min at a stirring speed of 300 rpm, and perform magnetic Separation means completing the dye removal treatment of the water body to be treated to obtain the treated water body.
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