Homogeneous corncob derived carbon electrode material and preparation method thereof
A technology of electrode material and corn cob, which is applied in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., can solve problems such as difficulty in obtaining, achieve low cost, simple preparation process, and overcome environmental pollution
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Embodiment 1
[0030] The collected corncobs were cleaned, dried, crushed, and sieved to obtain corncob powder particles between 10 and 18 mesh; the obtained corncob powder particles were transferred to a tube furnace and heated at a heating rate of 5 °C / min in a nitrogen atmosphere Heat at 800 °C for 2 h, then carbonize; mix the obtained carbonized material with KOH at a mass ratio of 1:3, grind thoroughly, and heat to 800 °C for 2 h at a heating rate of 5 °C / min in a nitrogen atmosphere to obtain activated Product; the obtained activated product was soaked in 1 mol / L HCl solution, then washed alternately with deionized water and alcohol, and finally dried in a 60 °C drying oven to obtain a homogeneous corncob-derived carbon electrode material.
[0031] The scanning electron microscope (SEM) image of the prepared homogeneous corncob-derived carbon electrode material is shown in figure 1 shown by figure 1 It can be seen that the microstructure and particle size of the prepared activated car...
Embodiment 2
[0033] The collected corncobs were cleaned, dried, crushed, and sieved to obtain corncob powder particles between 170 and 200 mesh; the obtained corncob powder particles were transferred to a tube furnace and heated at a heating rate of 20 °C / min in a nitrogen atmosphere Heat at 600°C for 24 hours, then carbonize; mix the obtained carbonized material with KOH at a mass ratio of 1:1, grind thoroughly, heat to 1000°C at a heating rate of 10°C / min in a nitrogen atmosphere and hold for 12 hours to obtain an activated product The activated product was soaked in 6 mol / L HCl solution, then washed alternately with deionized water and alcohol, and finally dried in a 150 °C drying oven to obtain a homogeneous corncob-derived carbon electrode material.
[0034] The scanning electron microscope (SEM) image of the prepared homogeneous corncob-derived carbon electrode material is shown in Figure 5 shown by Figure 5 It can be seen that the microstructure and particle size of the prepared ...
Embodiment 3
[0036] The collected corncobs were cleaned, dried, crushed, and sieved to obtain corncob powder particles between 325 and 400 mesh; the obtained corncob powder particles were transferred to a tube furnace and heated at a heating rate of 3 °C / min in a nitrogen atmosphere Keep warm at 1000 °C for 1 hour, then carbonize; mix the obtained carbonized material with KOH at a mass ratio of 1:6, grind thoroughly, heat to 600 °C at a heating rate of 20 °C / min in a nitrogen atmosphere, and keep warm for 24 h to obtain an activated product ; The activated product was soaked in 3 mol / L HCl solution, then washed alternately with deionized water and alcohol, and finally dried in a 50 °C drying oven to obtain a homogeneous corncob-derived carbon electrode material.
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