Preparation and application of an acid-treated graphite particle electrode
A technology of graphite particles and acid treatment, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of no significant effect of hydrogen peroxide production, increased cost, high temperature requirements, etc., and is conducive to electron transfer and hydrogen peroxide. Synthesis, increased yield, and high removal rate
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Embodiment 1
[0021] A preparation of an acid-treated graphite particle electrode, the steps are as follows:
[0022] Step 1, preprocessing: such as figure 1 As shown, graphite powder with a particle size of 30 μm and a model number of CAS#7782-42-5 was ultrasonically cleaned with deionized water for 30 minutes at 30 ° C, and dried in the air. Take 20g of dried graphite powder and immerse in 250mL of nitric acid solution with a mass fraction of 10%, and reflux at 80°C for 6h; when the solution is cooled to room temperature, wash the graphite powder with deionized water for 3 times, and remove the remaining residue with a suction filter. nitric acid solution; vacuum-dried at 80°C for 12 hours, and set aside;
[0023] Step 2, mixing: if figure 2 As shown, immerse the above-mentioned pretreated graphite powder into a container filled with absolute ethanol, and stir for 60 minutes in a water bath at 70°C to fully disperse and dissolve the graphite powder; add dropwise under the condition of ...
Embodiment 2
[0026] A preparation of an acid-treated graphite particle electrode, the steps are basically the same as in Example 1, the difference is only:
[0027] The mass fraction of the nitric acid solution used in the pretreatment of step 1 was changed from 10% to 20%, and finally a graphite particle electrode with a diameter of about 2.5 mm was prepared. The scanning electron microscope microscopic picture of the acid-treated graphite powder obtained in Example 2 is as follows Figure 6 shown.
Embodiment 3
[0029] A preparation of an acid-treated graphite particle electrode, the steps are basically the same as in Example 1, the difference is only:
[0030] The mass fraction of the nitric acid solution used in the pretreatment of step 1 was changed from 10% to 30%, and finally a graphite particle electrode with a diameter of about 2.5mm was prepared. The scanning electron microscope micrograph of the acid-treated graphite powder prepared in Example 3 is as follows Figure 7 shown.
[0031] pass Figure 4 to Figure 7 It can be seen that the graphite materials in each embodiment exhibit a flake structure. Compared with the comparative example, the graphite samples obtained in Examples 1 and 2 contain more graphite fragments, and the specific surface area and porosity are increased, which increases the reactivity and is beneficial to electron transfer and the synthesis of hydrogen peroxide. However, compared with the comparative example, the surface of Example 3 is smooth and flat,...
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