Aminated nano titanium dioxide, preparation method and application thereof
A technology of amination of nanometer and titanium dioxide, applied in the direction of titanium dioxide, titanium oxide/hydroxide, fixed on or in an inorganic carrier, etc., can solve problems such as the reduction of catalytic activity
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[0023] The invention provides a method for preparing aminated nano-titanium dioxide, the preparation method comprising:
[0024] a, the process of mixing lysine with ethylenediamine solution to prepare lysine solution;
[0025] b. The process of mixing tetrabutyl titanate with the lysine solution and contacting and reacting to prepare aminated nano-titanium dioxide.
[0026] In the above method, in the ethylenediamine solution, the lysine, ethylenediamine and tetrabutyl titanate are directly subjected to a contact reaction through a one-pot hydrothermal method to prepare nano-titanium dioxide with a large amount of amino groups formed on the surface. The amino groups on the surface of the aminated nano-titanium dioxide can be used as the immobilization site of the enzyme, so that the aminated nano-titanium dioxide can stably play the role of immobilizing the enzyme, that is, the aminated nano-titanium dioxide can be used as an efficient immobilized enzyme carrier. .
[0027]...
Embodiment 1
[0036] Dissolve anhydrous ethylenediamine in distilled water and mix well to prepare 30mL ethylenediamine solution ( Among them, ethylenediamine 5g, water 25g), then add 0.4g of lysine to the above-mentioned ethylenediamine solution and mix uniformly to form a lysine solution, then add 3mL (3g) n-tetrabutyl titanate and stir for 30min to form reaction solution, and the reaction solution was placed in a polytetrafluoroethylene-lined inner tank stainless steel reactor, and a hydrothermal reaction was carried out at 100°C to obtain a precipitate; finally, the precipitate was collected by centrifugation, and successively washed with distilled water, absolute ethanol and distilled water Wash and dry at 60°C for 10 hours to obtain aminated nano-titanium dioxide A1.
[0037] The amino group content of the aminated nano-titanium dioxide is 3mmol g -1 .
Embodiment 2
[0039] Carry out according to the method of embodiment 1, difference is that lysine is 0.3g, makes aminated nano-titanium dioxide A2.
[0040] The amino group content of the aminated nano-titanium dioxide is 2.7mmol g -1 .
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