A method for preparing nitrogen-containing carbon aerogels by drying under normal pressure in a super-salt environment
A technology of atmospheric drying and airgel, which is applied in the preparation/purification of carbon, etc., can solve the problems of unsuitable industrial production, polymerization, long aging time, cumbersome preparation process, etc., to achieve easy operation, save synthesis cycle, and prepare The effect of simple process
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Embodiment 1
[0041] In an ice-water bath, 6.5 g of ZnCl 2 , 0.941g of phenol and 0.25g of urea were added to 1.5ml of formaldehyde to obtain a white viscous colloid, which was hydrothermally reacted at 160°C for 8 hours; then, after drying the obtained black product at 135°C for 12 hours, the temperature, N 2 Insulate in the atmosphere for 2 hours, after naturally cooling to room temperature, immerse the prepared sample in 1M HCl for 48 hours, wash with deionized water repeatedly until the pH no longer changes, and dry the washed product at 80°C to obtain the final product.
[0042] For the phase analysis of this sample, an X-ray diffractometer (X'PertPRO) was used for the phase analysis of the sample. figure 1 , two diffraction peaks are assigned to the (002) crystal plane and (100) crystal plane of graphitic carbon.
Embodiment 2
[0044] In an ice-water bath, 6.5 g of ZnCl 2 , 0.941g of phenol and 0.25g of urea were added to 1.5ml of formaldehyde to obtain a white viscous colloid, which was hydrothermally reacted at 160°C for 8 hours; then, after drying the obtained black product at 135°C for 12 hours, the temperature, N 2 Insulate in the atmosphere for 2 hours, after naturally cooling to room temperature, immerse the prepared sample in 1M HCl for 48 hours, wash with deionized water repeatedly until the pH no longer changes, and dry the washed product at 80°C to obtain the final product.
[0045] The sample specific surface area that this embodiment makes is 828.9m 2 / g. For the phase analysis of this sample, an X-ray diffractometer (X'PertPRO) was used for the phase analysis of the sample. figure 1 , two diffraction peaks are assigned to the (002) crystal plane and (100) crystal plane of graphitic carbon.
[0046] The morphology analysis of the samples was observed with a Hitachi S-4700 II field e...
Embodiment 3
[0049] In an ice-water bath, 6.5 g of ZnCl 2 , 0.941g of phenol and 0.25g of urea were added to 1.5ml of formaldehyde to obtain a white viscous colloid, which was hydrothermally reacted at 160°C for 8 hours; then, after drying the obtained black product at 135°C for 12 hours, the temperature, N 2 Insulate in the atmosphere for 2 hours, after naturally cooling to room temperature, immerse the prepared sample in 1M HCl for 48 hours, wash with deionized water repeatedly until the pH no longer changes, and dry the washed product at 80°C to obtain the final product.
[0050] For the phase analysis of this sample, an X-ray diffractometer (X'PertPRO) was used for the phase analysis of the sample. figure 1 , two diffraction peaks are assigned to the (002) crystal plane and (100) crystal plane of graphitic carbon.
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Abstract
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