A kind of active/controllable graphene oxide surface ion imprinted polymer and its preparation method and application
A graphene surface, ion imprinting technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problem that the template molecules cannot be completely eluted, the adsorption rate is slow, and the thickness of the surface polymer layer is uncontrollable, etc. problem, to achieve good adsorption effect, large adsorption capacity, and avoid incomplete elution effect
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Embodiment 1
[0043] (1) Place the beaker in an ice bath and add 23 mL of concentrated sulfuric acid (98% mass fraction). Then, under stirring condition, add 1g colloidal graphite powder and 0.5g sodium nitrate. Then under strong stirring, slowly add 3g of potassium permanganate, and keep the reaction temperature lower than 20°C, and react for 5min. Then, the temperature was raised to 35°C, and the reaction was continued for 30min; after the reaction, 46mL deionized water was slowly added, and the temperature was raised to 98°C, and the reaction was continued for 15min; 140mL60°C deionized water and 7mL hydrogen peroxide (mass fraction 30%) was added to the above mixed solution until the solution turned yellow-brown and the reaction was terminated. Filter and wash with deionized water to pH = 7.0; finally, the obtained graphite oxide was dispersed in deionized water, ultrasonicated for 15 min, high-speed centrifuged, and vacuum-dried at 50°C to obtain graphene oxide, namely GO.
[0044] (...
Embodiment 2
[0056] (1) Place the beaker in an ice-water bath, and add 46 mL of concentrated sulfuric acid (98% mass fraction). Then, under stirring condition, add 2g colloidal graphite powder and 1g sodium nitrate. Then, under vigorous stirring, slowly add 6g of potassium permanganate, and keep the reaction temperature below 20°C, and react for 15min; then, raise the temperature to 35°C, and continue to react for 45min. After the reaction, add 92mL of deionized water slowly, raise the temperature to 98°C, and continue the reaction for 20 minutes; add 280mL of 60°C deionized water and 14mL of hydrogen peroxide (30% mass fraction) into the above mixed solution until the solution becomes Yellowish brown, the reaction is over; filter and wash with deionized water to pH=7.0, disperse the obtained graphite oxide in deionized water, ultrasonication for 15min, high-speed centrifugation, and vacuum drying at 50°C to obtain graphene oxide, namely GO.
[0057] (2) Add 100 mg of GO obtained in step ...
Embodiment 3
[0068](1) Place the beaker in an ice-water bath, and add 92 mL of concentrated sulfuric acid (mass fraction 98%). Then, under stirring condition, add 4g colloidal graphite powder and 2g sodium nitrate. Then under strong stirring, slowly add 12g of potassium permanganate, and keep the reaction temperature below 20°C, and react for 30min; raise the temperature to 40°C, and continue to react for 60min. After the reaction, add 184mL of deionized water slowly, raise the temperature to 98°C, and continue the reaction for 20min; add 560mL of 60°C deionized water and 28mL of hydrogen peroxide (30% mass fraction) to the mixed solution in step (1), Until the solution turns yellow-brown, the reaction is terminated. Filter and wash with deionized water to pH=7.0. Finally, the obtained graphite oxide was dispersed in deionized water and ultrasonicated for 15 min. After high-speed centrifugation and vacuum drying at 50°C, graphene oxide, namely GO, was prepared.
[0069] (2) Add 200 mg ...
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