Preparation and application of sr2+ doped tio2 composite hollow sphere photocatalyst
A technology of photocatalysts and hollow spheres, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of simple process, low cost, and reduced degradation cost
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example 1
[0021] 1) First add 50mL of absolute ethanol and 0.3mL of distilled water into a three-neck flask with stirring, then add 3.004*10 -5 g of strontium nitrate, after stirring to dissolve, continue to add 0.06g of nano carbon spheres, the diameter of carbon spheres is in the range of 100~250nm, ultrasonically disperse until mixed evenly.
[0022] 2) Add 50mL of absolute ethanol to a dry constant pressure dropping funnel, measure 0.5mL of n-butyl titanate and add it to prepare an ethanol solution of n-butyl titanate. Then it was slowly added into the three-neck flask under the condition of stirring, and after stirring for 5 minutes, it was heated to reflux at 80° C. for 6 hours. After reflux, continue to stir for 30 minutes, centrifuge, wash, and dry to obtain Sr 2+Doped carbon / titanium dioxide core-shell particles. Sr 2+ doped TiO 2 Composite hollow sphere photocatalyst, wherein the molar ratio of Sr / Ti is 0.1 / 100.
[0023] The specific surface area of the sample is 225.2...
example 2
[0026] 1) First add 60mL of absolute ethanol and 1mL of distilled water into a three-neck flask with stirring, then add 1.802*10 -3 g of strontium nitrate, stir and dissolve, then continue to add 0.6g of nano-carbon spheres, the diameter of the carbon spheres ranges from 100 to 250nm, and ultrasonically disperse until they are evenly mixed.
[0027] 2) Add 70mL of absolute ethanol to a dry constant pressure dropping funnel, measure 1.5mL of n-butyl titanate and add it to prepare an ethanol solution of n-butyl titanate. Then it was slowly added into the three-necked flask under the condition of stirring, and after stirring for 15 minutes, it was heated to reflux at 70° C. for 8 hours. After the reflux is completed, continue to stir for 60 minutes, centrifuge, wash, and dry to obtain Sr 2+ Doped carbon / titanium dioxide core-shell particles. Sr 2+ doped TiO 2 Composite hollow sphere photocatalyst, wherein the molar ratio of Sr / Ti is 0.2 / 100.
[0028] The specific surface are...
example 3
[0030] 1) First add 60mL of absolute ethanol and 1.5mL of distilled water into a three-neck flask with stirring, then add 9.010*10 -3 g of strontium nitrate, after stirring to dissolve, continue to add 0.9g of nano-carbon spheres, the diameter of which is in the range of 100-250nm, and ultrasonically disperse until they are evenly mixed.
[0031] 2) Add 80mL of absolute ethanol to a dry constant pressure dropping funnel, measure 3mL of n-butyl titanate and add it to prepare an ethanol solution of n-butyl titanate. Then it was slowly added into the three-necked flask under the condition of stirring, and after stirring for 20 minutes, it was heated to reflux at 90° C. for 5 hours. After the reflux is completed, continue to stir for 60 minutes, centrifuge, wash, and dry to obtain Sr 2+ Doped carbon / titanium dioxide core-shell particles. Sr 2+ doped TiO 2 Composite hollow sphere photocatalyst, wherein the molar ratio of Sr / Ti is 0.5 / 100.
[0032] Attachment of the present inv...
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