Method for preparing hydrophilic graphene
A graphene and hydrophilic technology, applied in the field of preparing hydrophilic graphene, can solve the problems of high toxicity, high price, difficulty in graphene research and application, etc., and achieve the effect of low cost, easy operation and simple process
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Embodiment 1
[0017] Weigh the graphite oxide prepared by the Hummers method and ultrasonically disperse it in deionized water to form a dispersion with a concentration of 0.5 g / L. Adjust the pH of the solution to 10 with ammonia water with a mass fraction of 28%, heat the solution to 100 °C, and add Iron powder, the mass ratio of iron powder to graphite oxide is 2:1, stirred and refluxed at 100 °C for 1 h, cooled, and separated the residual iron powder with a magnet to obtain a uniformly dispersed graphene dispersion, which was left for one month without precipitation Production; the uniform dispersion of graphene is vacuum-filtered through a microporous membrane, and the obtained solid product is washed with water three times, and dried in vacuum at 60°C.
[0018] Gained graphene dispersion is a stable black colloidal dispersion; figure 1 For the XRD pattern of the product, at 2 θ = 24.8 ?? A very broad (002) diffraction peak appears, corresponding to an interlayer spacing of about 0.3...
Embodiment 2
[0020] Weigh the graphite oxide prepared by the Hummers method and ultrasonically disperse it in deionized water to form a dispersion with a concentration of 0.2 g / L. Adjust the pH of the solution to 10 with ammonia water with a mass fraction of 28%, heat the solution to 100 °C, and add Iron powder, the mass ratio of iron powder to graphite oxide is 2:1, stirred and refluxed at 100 °C for 1 h, cooled, and separated the residual iron powder with a magnet to obtain a uniformly dispersed graphene dispersion, which was left for one month without precipitation Production; the uniform dispersion of graphene is vacuum-filtered through a microporous membrane, and the obtained solid product is washed with water three times, and dried in vacuum at 60°C.
Embodiment 3
[0022] Weigh the graphite oxide prepared by the Hummers method and ultrasonically disperse it in deionized water to prepare a dispersion liquid with a concentration of 1.0 g / L. Adjust the pH of the solution to 10 with ammonia water with a mass fraction of 28%, heat the solution to 100 °C, and add Iron powder, the mass ratio of iron powder to graphite oxide is 2:1, stirred and refluxed at 100 °C for 1 h, cooled, and separated the residual iron powder with a magnet to obtain a uniformly dispersed graphene dispersion, which was left for one month without precipitation Production; the uniform dispersion of graphene is vacuum-filtered through a microporous membrane, and the obtained solid product is washed with water three times, and dried in vacuum at 60°C.
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