A kind of graphene-titanium dioxide-attapulgite composite material and its preparation method and application
A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve the problems of small specific surface area, hindering application, etc., and achieve large specific surface area, reduce composite efficiency, and high photocatalytic effect. Effect
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Embodiment 1
[0033] A kind of preparation method of graphene-titanium dioxide-attapulgite composite material, comprises the following steps:
[0034] (1) Prepare graphene oxide suspension solution;
[0035] (11) Mix 8g of graphite powder and 210ml of concentrated sulfuric acid in an ice bath, then gradually add 230ml of potassium permanganate to it within 1 hour to obtain a mixed solution;
[0036] (12) Place the mixed solution obtained in step (11) at 30°C for constant temperature reaction for 0.5 hours, then place it on a magnetic stirrer and stir for 20 hours, then react at 90°C for 0.5 hours, filter to obtain a muddy mass, and then Add distilled water to the above-mentioned muddy mass, at 3000-4000r. min -1 Centrifuge for 10 minutes and centrifuge 2-3 times to obtain a graphene oxide suspension solution.
[0037] (2) Preparation of titanium dioxide suspension solution: Mix 18ml of concentrated hydrochloric acid, 10ml of water and 0.36g of ammonium sulfate, stir, then slowly add 4ml ...
Embodiment 2
[0043] A kind of preparation method of graphene-titanium dioxide-attapulgite composite material, comprises the following steps:
[0044] (1) Prepare graphene oxide suspension solution;
[0045] (11) Mix 12g of graphite powder and 220ml of concentrated sulfuric acid in an ice bath, then gradually add 210ml of potassium permanganate to it within 3 hours to obtain a mixed solution;
[0046] (12) Place the mixed solution obtained in step (11) at 50°C for constant temperature reaction for 2 hours, then place it on a magnetic stirrer and stir for 24 hours, then react at 70°C for 2 hours, filter to obtain a muddy mass, and then Add distilled water to the above-mentioned muddy mass, at 4000r. min -1 Centrifuge for 20 minutes and centrifuge 2-3 times to obtain a graphene oxide suspension solution.
[0047] (2) Preparation of titanium dioxide suspension solution: Mix 20ml of concentrated hydrochloric acid, 20ml of water and 0.38g of ammonium sulfate, stir, then slowly add 4.5ml of te...
Embodiment 3
[0052] A kind of preparation method of graphene-titanium dioxide-attapulgite composite material, comprises the following steps:
[0053] (1) Prepare graphene oxide suspension solution;
[0054] (11) Mix 10g of graphite powder and 230ml of concentrated sulfuric acid in an ice bath, then gradually add 220ml of potassium permanganate to it within 2 hours to obtain a mixed solution;
[0055] (12) Put the mixed solution obtained in step (11) at 40°C for constant temperature reaction for 1 hour, then place it on a magnetic stirrer and stir for 22 hours, then react at 80°C for 1 hour, filter to obtain a muddy mass, and then Add distilled water to the above-mentioned muddy mass, at 3000r. min -1 Centrifuge for 10 minutes and centrifuge 2-3 times to obtain a graphene oxide suspension solution.
[0056] (2) Preparation of titanium dioxide suspension solution: Mix 20ml of concentrated hydrochloric acid, 20ml of water and 0.38g of ammonium sulfate, stir, then slowly add 4.5ml of tetrab...
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