CN115159560B - Preparation method of hollow hydrangea-shaped zinc oxide, product and application thereof - Google Patents
Preparation method of hollow hydrangea-shaped zinc oxide, product and application thereof Download PDFInfo
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004202 carbamide Substances 0.000 claims abstract description 13
- XIOUDVJTOYVRTB-UHFFFAOYSA-N 1-(1-adamantyl)-3-aminothiourea Chemical compound C1C(C2)CC3CC2CC1(NC(=S)NN)C3 XIOUDVJTOYVRTB-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001354 calcination Methods 0.000 claims abstract description 11
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 241001092080 Hydrangea Species 0.000 claims abstract description 8
- 235000014486 Hydrangea macrophylla Nutrition 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 3
- 230000000593 degrading effect Effects 0.000 claims description 4
- 239000000516 sunscreening agent Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- 230000000475 sunscreen effect Effects 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 7
- 230000003197 catalytic effect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 18
- 239000004408 titanium dioxide Substances 0.000 description 9
- 230000001699 photocatalysis Effects 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 7
- 229940012189 methyl orange Drugs 0.000 description 7
- 238000007146 photocatalysis Methods 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 229910052984 zinc sulfide Inorganic materials 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910052950 sphalerite Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229920000428 triblock copolymer Polymers 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/27—Zinc; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/06—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of zinc, cadmium or mercury
-
- B01J35/39—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
- C01P2004/34—Spheres hollow
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a preparation method of hollow hydrangea zinc oxide, a product and application thereof, wherein the preparation method comprises the following steps: dissolving urea, zinc nitrate hexahydrate and a template agent in water, stirring, putting the mixture into a reaction kettle after ultrasonic treatment, taking out the mixture after reaction, and obtaining basic zinc carbonate after washing, centrifuging and drying; calcining the obtained basic zinc carbonate to obtain the hollow hydrangea-shaped zinc oxide. The preparation method of the hollow hydrangea zinc oxide has the advantages of simple operation, abundant material sources, low cost, high photochemical catalytic activity and good dispersivity, is a means for treating environmental pollution with low energy consumption and high efficiency, can effectively, economically and environmentally-friendly treat the environment, and has wide application prospect in photocatalytic degradation of environmental pollutants (especially organic pollutants).
Description
Technical Field
The invention belongs to the field of photocatalysis, in particular to a preparation method of hollow embroidered ball-shaped zinc oxide, a product and application thereof, and particularly relates to application of hollow embroidered ball-shaped zinc oxide in photocatalysis adsorption.
Background
The zinc oxide is white powder, has a chemical formula of ZnO, is hexagonal crystal, can be dissolved in acid, concentrated alkali hydroxide, ammonia water and ammonium salt solution, and is insoluble in water and ethanol. Zinc oxide is a common chemical additive and is widely used in plastics, silicate products, lubricants, flame retardants, paint coatings, and the like. The zinc oxide has larger energy band gap and exciton binding energy, high transparency and excellent normal-temperature luminous performance, and can be applied to products such as liquid crystal displays, thin film transistors, light-emitting diodes and the like in the semiconductor field.
Zinc oxide crystals have three structures: hexagonal wurtzite structure, cubic sphalerite structure, and the rare sodium chloride octahedral structure. Wurtzite structures are most stable among the three and are therefore most common. Cubic sphalerite structures are obtained by a means of gradually generating zinc oxide at the surface. In both crystals, each zinc or oxygen atom forms a regular tetrahedral structure with adjacent atoms centered about it. Octahedral structures have only been observed under high pressure conditions of 100 gigapascals. The wurtzite structure and the sphalerite structure have central symmetry, but have no axial symmetry. The symmetrical nature of the crystal enables the wurtzite structure to have a piezoelectric effect and a coke-hot spot effect, and the sphalerite structure has a piezoelectric effect. The spot group of wurtzite structure was 6mm (indicated by international symbol) and the space group was P63mc. In the lattice constant, a=3.25 angstroms, c=5.2 angstroms; the c/a ratio is about 1.60, approaching the ideal hexagonal ratio of 1.633. In semiconductor materials, zinc and oxygen are bonded by ionic bonds, which is one of the reasons for high piezoelectricity.
For the current technology, the common zinc oxide is dendritic, snowflake-shaped or solid and embroidered, and has no good pore diameter structure to effectively adsorb organic pollutants in water, so that the aim of degrading environmental pollutants is fulfilled, and as such, the zinc oxide has good catalytic performance, but has few practical catalytic applications.
And how to synthesize zinc oxide with a hollow structure is difficult to realize. In actual preparation, the proportion of raw materials (zinc nitrate hexahydrate and urea) needs to be accurately controlled, under the condition of ensuring that the zinc nitrate hexahydrate is accurate and unchanged, too little urea is low in yield and contains too many impurities, too much urea is added to cause too strong solution alkalinity in the reaction process, and the reaction speed is too high, so that the hollow effect required by us cannot be achieved.
Disclosure of Invention
The invention aims to: the technical problem to be solved by the invention is to provide a preparation method for preparing hollow hydrangea-shaped zinc oxide, which has the advantages of simple equipment, easily available raw materials, simple process, low cost and higher yield.
The invention also solves the technical problem of providing the hollow hydrangea-shaped zinc oxide obtained by the preparation method. The hollow embroidery spherical zinc oxide prepared by the invention can be used for catalyzing and degrading environmental pollutants under visible light, and effectively solves the problem of environmental pollution.
The technical scheme is as follows: in order to solve the technical problems, the invention provides a preparation method of hollow embroidery spherical zinc oxide, which comprises the following steps: dissolving urea, zinc nitrate hexahydrate and a template agent in water, stirring, putting the mixture into a reaction kettle after ultrasonic treatment, taking out the mixture after reaction, and obtaining basic zinc carbonate after washing, centrifuging and drying; calcining the obtained basic zinc carbonate to obtain the hollow hydrangea-shaped zinc oxide.
Wherein the template agent comprises, but is not limited to, block polyether F127, and further comprises triblock copolymer P123.
The components such as urea, zinc nitrate hexahydrate, F127 and the like can be adjusted according to the requirements. Preferably, the molar mass ratio of the zinc nitrate hexahydrate to the urea to the template agent is 1: (2-6): (0.2-0.5).
Wherein the stirring speed is 800-1000r/min
Wherein the condition of the ultrasonic is ultrasonic for 30min under the power of 400-700W.
Wherein the reaction temperature in the reaction kettle is 110 ℃, and the reaction time is 3-5h.
Wherein the calcination temperature is 350-450 ℃ and the calcination time is 2-4h.
The invention also discloses the hollow hydrangea zinc oxide prepared by the preparation method. The hollow hydrangea zinc oxide has higher activity in the aspect of photocatalytic degradation of environmental pollutants, and particularly can degrade organic dye under visible light.
The invention also discloses application of the hollow hydrangea zinc oxide in degrading environmental pollutants or preparing a physical sun-screening agent.
Wherein the weight ratio of the hollow embroidery spherical zinc oxide to the pollutant is 10:1.
The hollow embroidery spherical zinc oxide prepared by the invention is an N-type semiconductor with a wurtzite crystal structure, the direct band gap energy is about 3.37eV, the exciton binding energy is up to 60meV, electrons on the valence band can accept the energy in ultraviolet rays to generate transition, and the hollow embroidery spherical zinc oxide can be used for absorbing and scattering the ultraviolet rays and can be applied to physical sunscreens. The hollow embroidery spherical zinc oxide prepared by the invention has considerable antibacterial performance in dark places and under direct sunlight. In the field of photocatalysis, titanium dioxide has a proper direct band gap and a photocatalysis mechanism, is the most classical photocatalyst, and zinc oxide has the same characteristics as titanium dioxide and is considered to be the best photocatalysis material for replacing titanium dioxide. Zinc oxide has higher activity in photocatalytic degradation of environmental pollutants, especially in degradation of organic dyes under visible light.
The beneficial effects are that: compared with the prior art, the invention has the following advantages: the preparation method of the hollow embroidery spherical zinc oxide is simple to operate, rich in material source, low in cost, high in photochemical catalytic activity and good in dispersivity, is a means for treating environmental pollution with low energy consumption and high efficiency, can effectively, economically and environmentally-friendly treat the environment, and has wide application prospect in photocatalytic degradation of environmental pollutants (especially organic pollutants). The invention improves the raw materials and reduces the cost of the raw materials; the principle hydrothermal method of the experiment is simple to operate, and the prepared hollow embroidery spherical zinc oxide has larger specific surface area and more pore canal structures and better photocatalytic activity to degrade some organic matters in environmental problems.
Drawings
FIG. 1 is a flow chart for preparing hollow hydrangea-shaped zinc oxide;
FIG. 2 is an SEM image of hollow embroidery spherical zinc oxide;
FIG. 3 is a BET plot of hollow embroidery spherical zinc oxide;
FIG. 4 is a graph showing photocatalytic degradation of hollow embroidery spherical zinc oxide, titanium dioxide, and common zinc oxide;
FIG. 5 is a graph showing the fit of photocatalytic degradation rates of hollow embroidery spherical zinc oxide, titanium dioxide and common zinc oxide;
FIG. 6A comparative example shows solid hydrangea zinc oxide.
Detailed Description
Example 1 preparation of hollow embroidery spherical Zinc oxide
0.1moL of zinc nitrate hexahydrate is dissolved in 200mL of deionized water, 0.2moL of urea and 0.02moL of F127 (Sigma-Aldrich, P2443) are added, the stirring is continued for 30min at 400w power for 30min after 800r/min, the mixture is placed into a polytetrafluoroethylene reaction kettle for reaction for 3h at 110 ℃, a sample is taken out, washed and centrifuged by the deionized water for three times, and then the mixture is placed into a 60 ℃ oven for drying for 2h, and is placed into a muffle furnace for calcining for 2h at 350 ℃ to obtain the hollow hydrangea-shaped zinc oxide.
Example 2 preparation of hollow embroidery spherical Zinc oxide
0.1moL of zinc nitrate hexahydrate is taken and dissolved in 200mL of deionized water, 0.4moL of urea and 0.03moL of F127 (Sigma-Aldrich, P2443) are added, 900r/min is stirred for 30min,500W ultrasonic waves are put into a polytetrafluoroethylene reaction kettle for reaction for 30min at 130 ℃ for 4h, a sample is taken out, washed and centrifuged by the deionized water for three times, and then the sample is put into a 60 ℃ oven for drying for 2h, and is put into a muffle furnace for calcining for 3h at 400 ℃ to obtain hollow hydrangea-shaped zinc oxide.
Example 3 preparation of hollow embroidery spherical Zinc oxide
Dissolving 0.1moL of zinc nitrate hexahydrate in 200mL of deionized water, adding 0.6moL of urea and 0.05moL of P123 (ALORICH, 102280880), stirring at 1000r/min for 30min, placing 700W ultrasonic for 30min into a polytetrafluoroethylene reaction kettle for reaction at 110 ℃ for 5h, taking out a sample, washing with deionized water, centrifuging for three times, placing into a 60 ℃ oven for drying for 2h, and placing into a muffle furnace for calcining at 450 ℃ for 4h to obtain the hollow hydrangea zinc oxide.
Comparative example
0.1moL of zinc nitrate hexahydrate is dissolved in 200mL of deionized water, 1moL of urea and 0.03moL of F127 (Sigma-Aldrich, P2443) are added, 900r/min is stirred for 30min,700w is ultrasonically treated for 30min, the mixture is placed into a polytetrafluoroethylene reaction kettle for reaction for 3h, and after the precipitate is washed and centrifuged, the precipitate is placed into a muffle furnace for calcination at 450 ℃ for 3h, so that solid hydrangea-shaped zinc oxide is obtained, and the solid hydrangea-shaped zinc oxide is shown in FIG. 6.
Application examples
The hollow embroidery spherical zinc oxide prepared in examples 1-3 and the solid embroidery spherical zinc oxide prepared in comparative example are applied to water treatment (mainly organic water pollution), and a photocatalysis water treatment system comprises a xenon lamp, a condensation circulation system and an ultraviolet spectrophotometer.
The specific implementation process is as follows: the prepared hollow hydrangea-shaped zinc oxide was subjected to pore size analysis to ensure that there was sufficient pore size channel structure to adsorb organic matters (fig. 3, prepared in example 1). 10mg of hollow, embroidery-like zinc oxide (prepared in example 1) (FIG. 2) was added to 50mL of Methyl Orange (MO) at a concentration of 20mg L -1 Is a solution of (a) and (b). The solution was placed in dark for 30min to allow adsorption equilibrium between the photocatalyst and MO. The solution was irradiated under magnetic stirring under a xenon lamp (optical power 500W) and the temperature was controlled with a water circulation condensing system. 4mL of the reaction solution was taken every 10 minutes, centrifuged at 6000rpm for 4 minutes, and the supernatant was taken to remove the photocatalyst from the solution. The concentration of MO can be obtained by ultraviolet testing the absorbance of MO, the testing wavelength selected during testing is 464nm (the maximum absorption wavelength of methyl orange), and the absorbance of MO can be accurately analyzed under the wavelength, so that the photocatalytic degradation rate can be obtained. The test procedures in the present invention were all performed at room temperature. The three samples of the common zinc oxide, the titanium dioxide and the hollow embroidery spherical zinc oxide are subjected to the same group comparison experiment to obtain a photocatalysis reaction degradation graph (figure 4) of the hollow embroidery spherical zinc oxide, the titanium dioxide and the common zinc oxide, and the degradation rate of the hollow embroidery spherical zinc oxide can reach 78 percent, the degradation rate of the titanium dioxide reaches 55.4 percent and the degradation rate of the common zinc oxide only reaches 48.5 percent along with the increase of time. In addition, the hollow embroidery sphere zinc oxide has a faster catalytic degradation rate, titanium dioxide second, and common zinc oxide slowest in the same time (fig. 5).
Claims (4)
1. The preparation method of the hollow hydrangea-shaped zinc oxide is characterized by comprising the following steps of: dissolving urea, zinc nitrate hexahydrate and a template agent in water, stirring, putting the mixture into a reaction kettle after ultrasonic treatment, taking out the mixture after reaction, and obtaining basic zinc carbonate after washing, centrifuging and drying; calcining the obtained basic zinc carbonate to obtain hollow hydrangea-shaped zinc oxide; the template agent is F127 or P123, and the mol mass ratio of the zinc nitrate hexahydrate to the urea to the template agent is 1: (2-6): (0.2-0.5), wherein the calcination temperature is 350-450 ℃, the calcination time is 2-4h, the stirring rotating speed is 800-1000r/min, the ultrasonic condition is 400-700w ultrasonic for 30min, the reaction temperature in the reaction kettle is 110-140 ℃, and the reaction time is 3-5h.
2. A hollow embroidery spherical zinc oxide produced by the production method according to claim 1.
3. Use of the hollow hydrangea zinc oxide according to claim 2 for degrading environmental pollutants or for preparing a physical sunscreen.
4. Use according to claim 3, wherein the weight ratio of hollow embroidery spherical zinc oxide to contaminant is 10:1.
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