Bead-chain-like graphitized carbon nitride nano material and preparation method thereof
A technology of nanomaterials and carbon nitride, which is applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of poor shape controllability, difficulty in obtaining samples, and high difficulty in synthesis, so as to achieve less surface defects and better Application prospect, good effect of crystallinity
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[0034] Example 1
[0035] 1.1 Weigh 1.0g (0.0079mol) of melamine and add it to 50mL of ethylene glycol, stir for 30min, until a uniform initial solution is obtained;
[0036] 1.2 Take 20 mL of the initial solution, add 24 mL of the prepared 0.3mol / L nitric acid aqueous solution dropwise to the initial solution, continue to stir for 30 minutes, until the precipitation is completely precipitated;
[0037] 1.3 After centrifugal separation, the precipitate was washed twice with water, then washed twice with ethanol and dried to obtain a white solid powder of the precursor;
[0038] 1.4 Put the precursor solid powder obtained above in a tube furnace, under the protection of nitrogen atmosphere, heat up to 380°C at a heating rate of 10°C / min, heat it for 2h for calcination, and naturally cool to room temperature to obtain bead-like chain graphite Carbon nitride samples (such as figure 2 Shown).
[0039] The resulting bead-like chain-like structure has the following characteristics: the ...
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[0041] Example 2
[0042] The preparation method is the same as that in Example 1, except that: after dropping 14.4 mL of nitric acid aqueous solution with a concentration of 0.5 mol / L, the stirring time is 10 min; and the calcination is at 400°C for 1 h. The resulting bead-like graphitized carbon nitride morphology is as follows image 3 As shown, the resulting bead-like chain structure features: the diameter of the bead-like objects is 300-500nm, the bead-like spacing is 200-500nm; the diameter of the nanorods connecting the bead-like objects is 80-250nm; the chain length It is 5~12.5nm.
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[0043] Example 3
[0044] The preparation method is the same as that in Example 1, except that after 14.4 mL of nitric acid aqueous solution with a concentration of 0.5 mol / L is dropped, the stirring time is 30 min, and it is calcined at 450° C. for 1 h. The resulting bead-like graphitized carbon nitride morphology is as follows Figure 4 As shown, the structural characteristics of the obtained bead-like chain shape are: the diameter of the bead-like substance is 300-500nm, the bead-like spacing is 200-500nm; the diameter of the nanorods connecting the bead-like substance is 80-250nm; the chain length It is 5~12.5nm.
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