Preparation method of bismuth vanadate and nitrogen-doped graphene quantum dot composite visible light catalyst
A technology of graphene quantum dots and nitrogen doping, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor catalytic effect of photocatalysts, and improve the catalytic performance of visible light, Promote effective separation and simple preparation process
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Embodiment 1
[0017] BiVO 4 @2.5wt%NGQDs preparation steps:
[0018] (1) Take 1 g BiVO 4 Add 0.625 ml of NGQDs aqueous solution with a concentration of 40 g / L, stir well and vacuum dry overnight;
[0019] (2) After the fully dried sample was ground, it was baked at 180 °C for 1.5 h in a tube furnace continuously blown with argon.
Embodiment 2
[0021] BiVO 4 @5wt% NGQDs preparation specific steps: This implementation example is basically the same as Example 1, the difference is that in step (1) take 1.25 ml of NGQDs aqueous solution with a concentration of 40 g / L.
Embodiment 3
[0023] BiVO 4 Specific steps for preparing @10wt%NGQDs: This implementation example is basically the same as Example 1, except that 2.5 ml of NGQDs aqueous solution with a concentration of 40 g / L is taken in step (1).
[0024] figure 1 (a) is the TEM image of NGQDs, from figure 1 (a) It can be seen that the diameters of the quantum dots are all 1.5-4.0 nm. figure 1 (b) is a high-resolution transmission electron microscope image of NGQDs, from figure 1 (b), we can observe the clear lattice fringes of the samples prepared by the above steps. figure 1 (c) for BiVO 4 TEM image of @5wt%NGQDs, figure 1 (d) for BiVO 4 @5wt%NGQDs high-resolution transmission electron microscope image, by figure 1 (c) and figure 1 (d) It can be seen that the samples prepared according to the above steps, NGQDs were successfully loaded onto BiVO 4 nanoparticle surface.
[0025] figure 2 (a) Bismuth vanadate and nitrogen-doped graphene quantum dot composite visible light catalyst, adsorption-...
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