Method for preparing porous conductive carbon with rice husks as raw materials
A porous conductive, rice husk technology, applied in the removal of solid waste and other directions, can solve the problems of unreasonable utilization of rice husk resources, waste of resources, environmental pollution of rice husks, etc., and achieves good desiliconization effect, short reaction time, The effect of enhancing electrical conductivity
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Embodiment 1
[0014] 1. Dry 1 kg of rice husk and pulverize it into 60-mesh rice husk powder, then add 8 kg of solute mass percentage concentration to 10% hydrofluoric acid solution, stir evenly, place in a hydrothermal reaction kettle, React at a constant temperature of 180°C for 5 hours; filter and wash until the filtrate is neutral, and dry to obtain desiliconized rice husk powder;
[0015] 2. Take 0.25 kg of desiliconized rice husk powder and 0.2 kg of zinc carbonate obtained in step 1, mix them evenly, place the resulting mixture in a tube furnace, and put it in a mixed atmosphere of nitrogen and argon (volume ratio: 1:1) Then, the temperature was raised to 800°C at a rate of 15°C / min, kept at this temperature for 3 hours, and then cooled to room temperature (25°C) to prepare a porous conductive carbon composite material.
Embodiment 2
[0017] 1. Dry 0.5 kg of rice husk and pulverize it into 60-mesh rice husk powder, then add 10 kg of solute mass percentage concentration to 5% hydrofluoric acid solution, stir evenly, place in a hydrothermal reaction kettle, React at a constant temperature of 160°C for 2 hours; filter and wash until the filtrate is neutral, and dry to obtain desiliconized rice husk powder;
[0018] 2. Take 0.1 kg of desiliconized rice husk powder and 0.2 kg of zinc carbonate obtained in step 1, mix them evenly, place the resulting mixture in a tube furnace, and raise the temperature at a rate of 10°C / min under a nitrogen atmosphere. to 600°C, and kept at this temperature for 1 hour, then cooled to room temperature (25°C), to prepare a porous conductive carbon composite material.
Embodiment 3
[0020] 1. Dry 1.5 kg of rice husk and pulverize it into 60-mesh rice husk powder, then add 10 kg of solute mass percentage concentration to 10% hydrofluoric acid solution, stir evenly, place in a hydrothermal reaction kettle, React at a constant temperature of 170°C for 4 hours; filter and wash until the filtrate is neutral, and dry to obtain desiliconized rice husk powder;
[0021] 2. Take 0.2 kg of desiliconized rice husk powder obtained in step 1 and mix it with 0.13 kg of zinc carbonate, and mix the resulting mixture in a tube furnace. The rate was raised to 700° C., kept at this temperature for 2.5 hours, and cooled to room temperature (25° C.) to prepare a porous conductive carbon composite material.
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