Microwave-assisted method for preparing graphene through reduction of sodium citrate
A sodium citrate, microwave-assisted technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., to achieve uniform heating, increase reaction rate, and uniform size distribution
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Embodiment 1
[0025] Disperse 0.05g of graphite oxide prepared by the improved Hummers method in 200ml of deionized water, ultrasonically disperse at a power of 210~300W for 40~80min, add 1g of sodium citrate, stir evenly, and place in a microwave oven with a rated output power of 1000W In the reactor, set the reaction temperature at 70-95°C, react at a stirring rate of 600rpm / min for 60s-150s, cool to room temperature, and then centrifuge at a centrifugation rate higher than 13000rpm / min for more than three times, and freeze the black solid in the lower layer Just dry.
Embodiment 2
[0027] Disperse 0.1g of graphite oxide prepared by the improved Hummers method in 200ml of deionized water, ultrasonically disperse at a power of 210~300W for 40~80min, add 5g of sodium citrate, stir evenly, and place in a microwave oven with a rated output power of 1000W In the reactor, set the reaction temperature at 70-95°C, react at a stirring rate of 600rpm / min for 60s-150s, cool to room temperature, and then centrifuge at a centrifugation rate higher than 13000rpm / min for more than three times, and freeze the black solid in the lower layer Just dry.
Embodiment 3
[0029] Disperse 0.2g of graphite oxide prepared by the improved Hummers method in 200ml of deionized water, ultrasonically disperse at a power of 210~300W for 40~80min, add 10g of sodium citrate, stir evenly, and place in a microwave oven with a rated output power of 1000W In the reactor, set the reaction temperature at 70-95°C, react at a stirring rate of 600rpm / min for 60s-150s, cool to room temperature, and then centrifuge at a centrifugation rate higher than 13000rpm / min for more than three times, and freeze the black solid in the lower layer Just dry.
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