Preparation and sensing applications of functionalized three-dimensional graphene composite material
A composite material and functionalization technology, applied in the direction of chemical reaction of materials for analysis, chemiluminescence/bioluminescence, etc., can solve problems such as poor selectivity, achieve low detection limit, rich functional groups and ionic bonds, and improve specificity. Effects of Sexual Recognition
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Embodiment 1
[0017] (1) Preparation of ionic liquid@graphene: Weigh 0.10 g graphene oxide in 100 mL ultrapure water, sonicate for 15 min until uniform dispersion, then add 0.15 g 1-(3-dimethylaminopropyl) to it -3-Ethylcarbodiimide salt and 0.15 g N-hydroxysuccinimide, sonicated for 20 minutes until uniformly dispersed; then added 0.10 g of ionic liquid to the dispersion, followed by ultrasonication for 25 minutes and magnetic stirring for 25 minutes until mixed homogeneous; the mixture was magnetically stirred in an oil bath at 80°C for 2 h; then centrifuged at 8000 r / min for 8 min, and the supernatant was removed; finally, it was vacuum-dried at 50°C to obtain the ionic liquid@ Graphene;
[0018] (2) Preparation of β-cyclodextrin / ionic liquid@graphene airgel: Weigh 0.25 g ionic liquid@graphene in 50 mL ultrapure water, sonicate for 15 min until uniform dispersion; weigh 0.35 g β- Cyclodextrin and 0.10 g of sodium lauryl sulfate were added to 50 mL of ultrapure water, ultrasonicated for ...
Embodiment 2
[0021](1) Preparation of ionic liquid@graphene: Weigh 0.12 g graphene oxide in 100 mL ultrapure water, sonicate for 20 min until uniform dispersion, then add 0.18 g 1-(3-dimethylaminopropyl) to it -3-Ethylcarbodiimide salt and 0.18 g N-hydroxysuccinimide, sonicate for 25 minutes until uniformly dispersed; then add 0.12 g of ionic liquid to the dispersion, sonicate for 25 minutes and magnetically stir for 25 minutes to mix uniform; the mixture was magnetically stirred in an oil bath at 80°C for 2.5 h; then centrifuged at 8000 r / min for 8 min, and the supernatant was removed; finally, vacuum-dried at 50°C to obtain ionic liquid@ Graphene;
[0022] (2) Preparation of β-cyclodextrin / ionic liquid@graphene airgel: Weigh 0.28 g ionic liquid@graphene in 50 mL ultrapure water, sonicate for 20 min until uniform dispersion; weigh 0.40 g β- Cyclodextrin and 0.12 g of sodium lauryl sulfate were added to 50 mL of ultrapure water, ultrasonicated for 25 min until uniformly dispersed; then th...
Embodiment 3
[0025] (1) Preparation of ionic liquid@graphene: Weigh 0.15 g graphene oxide in 100 mL ultrapure water, sonicate for 20 min until uniform dispersion, then add 0.20 g 1-(3-dimethylaminopropyl) to it -3-Ethylcarbodiimide salt and 0.20 g N-hydroxysuccinimide, sonicated for 30 min until uniformly dispersed; then, 0.15 g of ionic liquid was added to the dispersion, sonicated for 30 min and magnetically stirred for 30 min until mixed homogeneous; the mixture was magnetically stirred in an oil bath at 80°C for 3 h; then centrifuged at 8000 r / min for 8 min, and the supernatant was removed; finally, it was vacuum-dried at 50°C to obtain the ionic liquid@ Graphene;
[0026] (2) Preparation of β-cyclodextrin / ionic liquid@graphene airgel: Weigh 0.30 g ionic liquid@graphene in 50 mL ultrapure water, sonicate for 20 min until uniform dispersion; weigh 0.50 g β- Cyclodextrin and 0.15 g sodium lauryl sulfate were added to 50 mL of ultrapure water, ultrasonicated for 30 min until uniformly di...
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