A kind of porous carbon with high porosity and its preparation method and application
A high-porosity, porous carbon technology, applied in the field of porous carbon, can solve the problems of complex procedures and large harmful waste water, and achieve the effects of simple process, increased pore volume, and increased specific surface area
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Embodiment 1
[0031] S1. Put 6g of zinc gluconate into an alumina crucible, put it into a quartz tube furnace with a gas switching function, and raise the temperature to 900°C at a rate of 1°C / min under nitrogen protection, and then immediately Switch the gas to carbon dioxide gas, keep the flow rate of carbon dioxide gas at 50mL / min and keep it warm for 2 hours, then switch the gas to nitrogen gas to obtain a porous carbon-zinc oxide composite;
[0032] S2. In a nitrogen atmosphere, heat-treat the porous carbon-zinc oxide composite at 900°C for 2 hours, then cool to room temperature with the furnace, collect the reaction product, and grind to obtain a high-porosity porous carbon, which is a micron-sized particle , with a size of 10-50 μm.
[0033] The scanning electron micrographs, X-ray diffraction patterns and nitrogen adsorption / desorption curves of the high-porosity porous carbon are as follows: figure 1 , figure 2 with image 3 shown. from figure 1 It can be seen from the result...
Embodiment 2
[0035] Prepare high-porosity porous carbon according to the method of Example 1, the difference is that the temperature of the heat treatment in step S2 is 1000°C, and the heating rate from the activation temperature of step S1 to the heat treatment temperature is 1°C / min, and the remaining conditions are the same as Same as in Example 1, a high-porosity porous carbon was obtained, which was micron-sized particles with a size of 10-50 μm. The nitrogen adsorption / desorption curves of the high-porosity porous carbon are as follows: Figure 4 shown. from Figure 4 The results can be calculated, the specific surface area and total pore volume of the high porosity porous carbon are 2950m 2 / g and 2.42cm 3 / g.
Embodiment 3
[0037] Prepare high-porosity porous carbon according to the method of Example 1, the difference is that the temperature of the heat treatment in step S2 is 1100 ° C, and the heating rate from the activation temperature of step S1 to the heat treatment temperature is 1 ° C / min, and the remaining conditions are the same as Same as in Example 1, a high-porosity porous carbon was obtained, which was micron-sized particles with a size of 10-50 μm. The nitrogen adsorption / desorption curves of the high-porosity porous carbon are as follows: Figure 5 shown. from Figure 5 It can be calculated that the specific surface area and total pore volume of the high porosity are 1793m 2 / g and 1.43cm 3 / g.
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