Preparation method and application of ZnO-doped TiO2 composite hollow sphere
A hollow sphere and recombination light technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, light water/sewage treatment, etc., to achieve the effects of improving utilization, increasing activity and inhibiting recombination
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example 1
[0018] 1) Weigh 0.0022g of zinc acetate hexahydrate into a three-neck flask with stirring, measure 30ml of absolute ethanol, and prepare an ethanol solution of zinc acetate. Then weigh 0.06g of nano-carbon spheres, the diameter of which is in the range of 150-400nm, add 0.3ml of distilled water into it, and ultrasonically disperse until uniformly mixed.
[0019] 2) Add 30 ml of absolute ethanol into a dry constant pressure dropping funnel, measure 0.3 ml of n-butyl titanate and add it to prepare an ethanol solution of n-butyl titanate.
[0020] 3) Slowly add n-butyl titanate ethanol solution into the mixed solution obtained in step 1) under stirring condition, stir, and heat to reflux at 80° C. for 6 h. After the reflux is completed, continue to stir for 30 minutes, centrifuge, wash, and dry to obtain Zn 2+ Doped carbon / titania core-shell particles.
[0021] 4) with the Zn that step 3) obtains 2+ Doped carbon / titanium dioxide core-shell particles were fired in a mufur furna...
example 2
[0025] 1) Weigh 0.0066g of zinc acetate hexahydrate and put it into a three-necked flask with stirring, measure 50ml of absolute ethanol, and prepare an ethanolic solution of zinc acetate. Subsequently, 0.06 g of carbon nanospheres were weighed, and the diameters of the carbon spheres ranged from 150 to 400 nm. 0.5 ml of distilled water was weighed and added to it, and ultrasonically dispersed until the mixture was uniform.
[0026] 2) Add 50 ml of absolute ethanol to a dry constant pressure dropping funnel, measure 0.3 ml of n-butyl titanate and add it to prepare an ethanol solution of n-butyl titanate.
[0027] 3) The n-butyl titanate ethanol solution was slowly added to the mixed solution obtained in step 1) under stirring conditions, stirred, and heated under reflux at 80° C. for 6 hours. After refluxing, continue stirring for 6h, centrifuge, wash, and dry to obtain Zn 2+ Doped carbon / titania core-shell particles.
[0028] 4) Zn obtained in step 3) 2+ The doped carbon / t...
example 3
[0031] According to the preparation process steps of specific example 2, the difference is that the amount of zinc acetate hexahydrate added in step 2) is 0.022g to obtain ZnO-doped TiO 2 A hollow sphere, wherein the Zn / Ti molar ratio in the hollow sphere is 1 / 10.
[0032] Attachment of the present invention figure 1 The curve according to Example 3 is the XRD pattern of the prepared photocatalyst. It can be seen from the figure that the TiO in the composite photocatalyst 2 For the anatase structure.
[0033] Attachment of the present invention image 3 It is the SEM image of the photocatalyst prepared according to Example 3. It can be seen from the figure that the prepared photocatalyst has a hollow sphere structure with an average diameter of 338.38 nm, a range of 200-481.18 nm, an average wall thickness of 39.3 nm, and a range of 18.18-45.46 nm. The specific surface area of the sample is 256.30m 2 / g, for 1 h of illumination time, the ultraviolet photocatalytic degr...
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