Loaded type double-component nano oxide adsorbent as well as preparation method and application thereof
A nano-oxide, two-component technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problem of large size of nano-oxides, high cost, and need to improve adsorption performance, etc. problem, to achieve the effect of improving stability and reproducibility, enhancing interaction, and improving adsorption activity
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Embodiment 1
[0027] Example 1: Dissolve 1.000g of tetrabutyl titanate in 60mL of ethanol, add 1g of MCM-41 molecular sieve, stir for 60min, so that tetrabutyl titanate is fully adsorbed on the surface and pores of the molecular sieve, add 5mL of deionized water dropwise, Hydrolyze tetrabutyl titanate on molecular sieves to generate titanium dioxide nanoparticles, with an average particle size of 4-6nm, so that the molecular sieve pores and titanium dioxide nanoparticles form a confined space; then add ferrous sulfate aqueous solution drop by drop, because ferrous sulfate is insoluble In ethanol, after dripping, it will gradually precipitate into ferrous sulfate nanoparticles, which will be filled in the above confined space; after centrifugation to obtain solids and dry them, they will be calcined at 550°C for 2 hours in an air atmosphere to obtain MCM-41-loaded nano-titanium-iron double oxide adsorbent. figure 1 is the XRD curve of the obtained adsorbent, and its crystal form is α-Fe 2 o...
Embodiment 2
[0028] Example 2: Dissolve 1.000g of ethyl silicate in 60mL of ethanol, add 1g of MCM-41 molecular sieve, and stir for 60min, so that ethyl silicate is fully adsorbed on the surface and pores of the molecular sieve, and 5mL of deionized water is added dropwise to make silicon Ethyl acetate is hydrolyzed on the molecular sieve to generate silica nanoparticles with an average particle size of 4-6nm, so that the pores of the molecular sieve and the silica nanoparticles form a confined space, and then add the ferrous sulfate aqueous solution drop by drop, because the ferrous sulfate Insoluble in ethanol, it will gradually precipitate into ferrous sulfate nanoparticles after dripping, filling in the above-mentioned confined space; after centrifugation to obtain solids and dry them, roast them in air at 550°C for 2 hours to obtain MCM-41-loaded nano-silicon- Iron double oxide adsorbent.
Embodiment 3
[0029]Example 3: Dissolve 1.000g of tetrabutyl titanate in 60mL of ethanol, add 1g of KIT-6 molecular sieve, stir for 60min, so that tetrabutyl titanate is fully adsorbed on the surface and pores of the molecular sieve, add 5mL of deionized water dropwise, Hydrolyze tetrabutyl titanate on molecular sieves to generate titanium dioxide nanoparticles, with an average particle size of 8-10nm, so that the molecular sieve pores and titanium dioxide nanoparticles form a confined space, and then add ferrous sulfate aqueous solution drop by drop, because ferrous sulfate is insoluble In ethanol, after dropping, it will gradually precipitate into ferrous sulfate nanoparticles, which will be filled in the above-mentioned confinement space; after centrifugation to obtain solids and dry them, they will be calcined at 550°C for 2 hours in air atmosphere to obtain KIT-6 loaded nano-titanium-iron double oxide adsorbent.
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