Preparation method of graphite oxide with high degree of oxidation and high dispersibility
A high-dispersion, oxidized stone technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of low oxidation degree of graphite oxide, increase graphite pre-oxidation process, prolong low-temperature reaction time, etc., and achieve raw material Low cost, shortened post-processing time, and easy operation
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Embodiment 1
[0030] The method for preparing highly dispersible graphite oxide by using Xinghe 325 mesh flake graphite comprises the following preparation steps:
[0031] 1. Put the beaker in an ice-salt bath. After the temperature in the beaker drops to -4°C, weigh 1 gram of Shuangxing 325 mesh flake graphite powder, add it to the beaker, and take 23ml of concentrated sulfuric acid with a mass percentage concentration of 98%. Slowly add to the beaker, and then add 0.5 grams of nitrate, the nitrate is sodium nitrate, put in the magnet;
[0032] 2. Set the stirring speed to 300 rpm, and stir and react at -4°C for 24 hours;
[0033] 3. After the low-temperature reaction is over, remove the ice-salt bath, soak the beaker in a water bath, and stir at 500 rpm. Weigh 3 grams of potassium permanganate and slowly add it to the concentrated sulfuric acid graphite powder solution within 5-10 minutes, and the temperature of the water bath is raised to 35°C for 4 hours until the solution becomes ...
Embodiment 2
[0047] Example 2. Press the preparation method of embodiment 1, just change the amount of described potassium permanganate into 8 grams, obtain equally figure 2 , image 3 , Figure 4 As a result, the obtained graphite oxide was tested for elemental analysis, and the carbon-oxygen ratio of graphite oxide obtained was 0.96;
Embodiment 3
[0048] Embodiment 3. is pressed the preparation method of embodiment 1, just described nitrate is 0.5 gram potassium nitrate, obtains equally figure 2 , image 3 , Figure 4 As a result, the obtained graphite oxide was tested for elemental analysis, and the carbon-oxygen ratio of graphite oxide obtained was 0.96;
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