Nanometer zinc oxide/graphene composite material and preparation method thereof
A technology of nano-zinc oxide and composite materials, which is applied in the field of nano-zinc oxide/graphene composite materials and its preparation, can solve problems such as high cost and complexity, and achieve the effect of simple operation and mild preparation conditions
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Embodiment 1
[0027] Mix and stir 5.0g of graphite, 120mL of 98% concentrated sulfuric acid and 2.5g of sodium nitrate for 30min, weigh 15g of potassium permanganate and add to the mixture and continue to stir for 24h; add 150mL of distilled water in an ice-water bath to dilute and stir for 24h; add 50mL of 30wt% H 2 o 2 The aqueous solution was stirred for 24 hours; the bottom black bulk precipitate and the supernatant in the resulting mixture were removed by centrifugation, and the light-colored product in the middle layer was collected, washed repeatedly with distilled water until no precipitate was visible, and the GO suspension (3mg / mL) was collected for later use.
[0028] The diluted GO suspension (25.0 mL, 1.0 mg / mL) was transferred to a 25 mL vial. Add 25 mg of nano-zinc oxide to the above sample bottle and ultrasonically mix for 30 min, then place the sample bottle in an oil bath at 90°C. After 15 hours, the yellow-brown suspension became transparent, and a black cylindrical soli...
Embodiment 2
[0030] Mix and stir 5.0g of graphite, 120mL of 98% concentrated sulfuric acid and 2.5g of sodium nitrate for 30min, weigh 15g of potassium permanganate and add to the mixture and continue to stir for 24h; add 150mL of distilled water in an ice-water bath to dilute and stir for 24h; add 50mL of 30wt% H 2 o 2 The aqueous solution was stirred for 24 hours; the bottom black bulk precipitate and the supernatant in the resulting mixture were removed by centrifugation, and the light-colored product in the middle layer was collected, washed repeatedly with distilled water until no precipitate was visible, and the GO suspension (3mg / mL) was collected for later use.
[0031] The diluted GO suspension (25.0 mL, 1.0 mg / mL) was transferred to a 25 mL vial. Add 25 mg of nano-zinc oxide to the above sample bottle and ultrasonically mix for 30 minutes, place the sample bottle in an oil bath at 90° C. and add a magnet to the sample bottle for stirring. After 15 hours, the yellow-brown suspens...
Embodiment 3
[0036] Mix 1.0g of graphite, 50mL of 98% concentrated sulfuric acid and 1g of sodium nitrate and stir for 10min, weigh 5g of potassium permanganate and add to the mixture and continue to stir for 12h; add 100mL of distilled water in an ice-water bath to dilute and stir for 12h; add 10mL of 30wt% H 2 o 2 The aqueous solution was stirred for 6 h; the bottom black bulky precipitate and the supernatant in the resulting mixture were removed by centrifugation, and the light-colored product in the middle layer was collected, washed repeatedly with distilled water until no precipitate was visible, and the GO suspension (3 mg / mL) was collected for later use.
[0037]The diluted GO suspension (25.0 mL, 1.0 mg / mL) was transferred to a 25 mL vial. Add 25 mg of nano-zinc oxide to the above sample bottle and ultrasonically mix for 30 min, place the sample bottle in an oil bath at 70° C. and add a magnet to the sample bottle for stirring. After 5h, the yellow-brown suspension became transpa...
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