A self-assembled micro-nano structure bivo 4 A Simple Preparation Method of Microspheres
A technology of micro-nano structure and self-assembly, applied in the field of photocatalysis, to achieve the effect of simple and easy-to-control preparation process
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Embodiment 1
[0031] figure 1 with figure 2 For the BiVO prepared in Example 1 4 The SEM image of microspheres, using the BiVO prepared in Example 1 4 The microspheres are composed of irregular polyhedrons, uniformly dispersed and large in size.
[0032] 2mmol (0.97g) Bi(NO 3 ) 3 ·5H 2 O was added to 30mLHAc (purity 99.5%), stirred until completely dissolved, as solution A; 2mmol (0.368g) of Na 3 VO 4 Add to 5mL of deionized water, stir until completely dissolved, then add 30mL of HAc (purity 99.5%), continue to stir for 30min, as solution B; add solution B dropwise to solution A, and continue to stir for 30min; mix The final solution C was transferred to a 100mL reactor and subjected to hydrothermal reaction at 140°C for 4h; after the reactor was cooled to room temperature, the reaction product was centrifuged and washed three times with deionized water and absolute ethanol; The obtained powder was dried in an oven at 60°C for 6 hours; the dried powder was placed in a muffle furna...
Embodiment 2
[0034] image 3 with Figure 4 For the BiVO prepared in Example 2 4 The SEM image of microspheres, using the BiVO prepared in Example 2 4 The surface of the microspheres has a quadrangular pyramid structure, which is uniformly dispersed and has large particles.
[0035] 2mmol (0.97g) Bi(NO 3 ) 3 ·5H 2 O was added to 30mLHAc (purity 99.5%), stirred until completely dissolved, as solution A; 2mmol (0.368g) of Na 3 VO 4Add to 5mL of deionized water, stir until completely dissolved, then add 30mL of HAc (purity 99.5%), continue to stir for 30min, as solution B; add solution B dropwise to solution A, and continue to stir for 30min; mix The final solution C was transferred to a 100mL reactor and subjected to hydrothermal reaction at 140°C for 6h; after the reactor was cooled to room temperature, the reaction product was centrifuged and washed three times with deionized water and absolute ethanol; The obtained powder was dried in an oven at 60°C for 6 hours; the dried powder ...
Embodiment 3
[0037] Figure 5 with Image 6 For the BiVO prepared in Example 3 4 The SEM image of microspheres, using the BiVO prepared in Example 3 4 The surface of the microspheres has a quadrangular pyramid structure, which is uniformly dispersed and has large particles.
[0038] 2mmol (0.97g) Bi(NO 3 ) 3 ·5H 2 O was added to 30mLHAc (purity 99.5%), stirred until completely dissolved, as solution A; 2mmol (0.368g) of Na 3 VO 4 Add to 5mL of deionized water, stir until completely dissolved, then add 30mL of HAc (purity 99.5%), continue to stir for 30min, as solution B; add solution B dropwise to solution A, and continue to stir for 30min; mix The final solution C was transferred to a 100mL reactor and subjected to hydrothermal reaction at 140°C for 8h; after the reactor was cooled to room temperature, the reaction product was centrifuged and washed three times with deionized water and absolute ethanol; The obtained powder was dried in an oven at 60°C for 6 hours; the dried powder...
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