CN1846849A - Prepn process of photocatalytic microball for environment treatment - Google Patents
Prepn process of photocatalytic microball for environment treatment Download PDFInfo
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- CN1846849A CN1846849A CN 200510065446 CN200510065446A CN1846849A CN 1846849 A CN1846849 A CN 1846849A CN 200510065446 CN200510065446 CN 200510065446 CN 200510065446 A CN200510065446 A CN 200510065446A CN 1846849 A CN1846849 A CN 1846849A
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Abstract
The present invention discloses the preparation process of photocatalytic microballoon for environment treatment. The photocatalytic microballoon is prepared with nanometer titania with photocatalytic activity, zinc oxide and composite photocatalytic material as basic material, and through cross-linking reaction with organic-inorganic composite cross-linking agent to form cross-linked microballoon with both high adsorption and photocatalytic performance. It has certain space size for easy separation and recovery and high photocatalytic environment treating efficiency.
Description
Technical field
The present invention relates to a kind of preparation method of nano material photocatalytic microball, relate in particular to a kind of preparation method who is applied to the photocatalysis complex microsphere of environmental treatment.
Background technology
Photocatalysis nano material mainly refers to nano titanium oxide, nano zine oxide semi-conducting material, is topmost research object with nano titanium oxide again wherein, from employing TiO such as Carey in 1976
2Since photocatalytic degradation biphenyl and the askarel, obtained domestic and international extensive concern based on the photocatalysis technology of titanium dioxide.
For making TiO
2Catalysis material is aspect environmental protection, and particularly sewage treatment area obtains practical application, and people have adopted several different methods, mainly contains:
(1) with TiO
2Photocatalysis film: utilize sol-gal process, with TiO
2Catalysis material as glass, porous ore etc., is at high temperature calcined attached to object surfaces then at formative stage not, finishes TiO
2The moulding of catalysis material, and then formed one deck TiO at body surface
2Photocatalysis film, and then allow sewage flow through from film surface, auxiliary ultraviolet light carries out the effect of photocatalysis Decomposition pollutant.
(2) use TiO
2Catalysis material is made the ceramic material microballoon: utilize methods such as high-temperature roasting or assistant depositing, by reaction, with TiO
2Catalysis material is made the microballoon of photocatalysis coating attached to the ceramic microsphere surface, swims in the sewage with these microballoons, reaches the purpose of absorption and decomposing pollutant.
(3) directly photocatalysis nano material is scattered in the pollutant, by the photocatalysis Decomposition pollutant.
More than (1) (2) in the method for large particle surface loaded nano-photocatalyst material, the material that the most of space of system is not had photocatalytic activity takies, and not only causes the space waste, also influences the light application efficiency, makes that the wastewater treatment efficiency of unit space is lower; (3) though method photocatalysis treatment efficient improves, and Nanodispersion reclaims difficulty and causes cost too high, can't practical application.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of novel nano-photo catalytic complex microsphere, to improve nano-photocatalyst material in the service efficiency aspect the environmental treatment, improve effective nanometer space and with the recyclability that separates of solvent, to improve the photocatalysis treatment ability of unit space, reduce the photocatalysis treatment cost.
For achieving the above object, the present invention adopts nano-photocatalyst material list dispersing composite bodies system, by an organic inorganic compounding crosslinking agent operation technique, and preparation hollow nanometer adherend particulate, this method may further comprise the steps:
A makes the nano particle monodisperse system with nano-photocatalyst material in pure water mixed solvent;
B under agitation adds an organic inorganic compounding crosslinking agent among the A, thereby obtain homodisperse mixed dispersion liquid, wherein by percentage to the quality, the ratio of nano-photocatalyst material, an organic inorganic compounding crosslinking agent, water and alcohol is respectively 30%～50%, 1%～10%, 10%～50% and 30%～60%;
The mixed dispersion liquid heat drying that C obtains step B, wherein heating-up temperature is between 100～200 ℃, and heat time heating time was between 0.5～5 hour; And
The cross-linking products that D obtains step C is ground into the particulate that requires size
The present invention is by selecting suitable crosslinking agent, nano-photocatalyst material is bonded to bulky grain microballoon with nanometer space structure, be applied in the environmental treatment, product is compared with common nano-photocatalyst material, has better separation recyclability, have more applying nanos space in the unit volume but compare with the support type catalysis material, the light application efficiency also is greatly improved.Make the environmental treatment range of application more extensive, the photocatalysis treatment cost also greatly reduces.
The specific embodiment
In the preparation method who is used for the photocatalysis composite particles of environmental treatment of the present invention, with photocatalysis nano materials such as nano titanium oxide, nano zine oxides is base-material, crosslinked action by an organic inorganic compounding crosslinking agent, nano-photocatalyst material is carried out crosslinked bonding, dry crosslinked under certain heating-up temperature again, pulverize granulation and form photocatalysis composite particles with nanometer space.Among the above-mentioned preparation method, described nano-photocatalyst material refers to nano titanium oxide, nano zine oxide and their ion hydridization combination product, wherein nano titanium oxide comprises that 2 nanometers～100 nanometers have at least a in the titanium dioxide metatitanic acid of photocatalytic activity, nano zine oxide comprises that 2 nanometers～100 nanometers have at least a in the zinc oxide of photocatalytic activity, nano titanium oxide, nano oxidized zinc ion hydridization compound refers to above-mentioned nano titanium oxide, the compound that is obtained by ion hydridization, a described organic inorganic crosslinking agent comprises that silicate is (as sodium metasilicate, potassium silicate, lithium metasilicate etc.), silane coupler (KH550, KH560, KH570, A-189 etc.), polyvinyl alcohol, acrylic resin, in the alkyd resins at least two kinds.
Describe the preferred embodiments of the present invention below in detail.
Embodiment 1, and concrete steps are as follows:
A. the nano titanium oxide about 50 grams, 10 nanometers is distributed in the ethanol water (1: 1 volume ratio) of 50 grams;
B. under stirring condition, slowly add 2.5 gram KH550, add 30 gram potassium silicates again, 2 gram styrene-acrylic resins, 120 ℃ of following heat dryings are 2 hours then, obtain block desciccate;
C. block desciccate is ground into and needs size, sieves to obtain a certain size particulate;
This particulate has good photocatalytic activity, possesses separated from solvent preferably simultaneously.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1,50 gram nano titanium oxides changed into, and 40 gram nano titanium oxides, 10 gram nano zine oxides, other conditions are identical.Finally obtain nano-TiO
2-Zn photocatalysis compound has visible light catalysis activity, good separated from solvent.
Embodiment 3
Embodiment 3 is with the difference of embodiment 1, changes 50 gram nano titanium oxides in the example 1 nano titanium oxide of 50 gram iron ion hydridization into, and other conditions are identical.Finally obtain nano-TiO
2-Fe compound photocatalysis particulate has visible light catalysis activity, good separated from solvent.
Embodiment 4
Embodiment 4 is with the difference of embodiment 1, changes 2.5 gram KH550 in the example 1 into 2.5 KH560 that restrain, and other conditions are identical.Have good photocatalytic activity and separated from solvent preferably.
Embodiment 5
Embodiment 5 is with the difference of embodiment 1, changes 2 styrene-acrylic resins that restrain in the example 1 into 2 gram polyvinyl alcohol, and other condition is identical.Finally obtain nano-TiO
2The photocatalysis composite particles has good photocatalytic activity and separated from solvent preferably.
Claims (4)
1, a kind of preparation method who is used for the photocatalytic microball of environmental treatment is characterized in that:
(1) be stock with photocatalytic nanometer compounds such as nano titanium oxide, nano zine oxide, ion compounds.
(2) handle basic nano-photocatalyst material is bonding by the organic-inorganic composite crosslinking, form the small porous particle of all nanostructureds.
2, preparation method as claimed in claim 1 is characterized in that, selected basic material is at least a in nano-titanium oxide, nano zine oxide, the ion compound.Selected organic-inorganic multiple crosslinking agent is at least two kinds in silicate (as sodium metasilicate, potassium silicate, lithium metasilicate), silane coupler (as KH550, KH560, KH570, A-189), polyvinyl alcohol, acrylic resin, the alkyd resins.
3, a kind of preparation method of nanometer titanic oxide composite photochemical catalyst material is characterized in that, comprises following steps:
(1) the nano-photo catalytic basic material is distributed in the pure water mixed solvent, makes the nano material monodisperse system.
(2) solution that step (1) is made slowly adds organic-inorganic multiple crosslinking agent as claimed in claim 2 under high-speed stirred.
(3) with the product of step (2) preparation, get block product by heat drying.Wherein heating-up temperature is between 90～200 ℃, and heat time heating time was between 0.5～5 hour; And
(4) block product is selected as required the suitable pulverization conditions that gets, be ground into the photocatalytic microball finished product that requires size.
4, preparation method as claimed in claim 3, its characteristics of photocatalytic microball of preparation are, by nano particle with photocatalytic activity by the bonding complex microsphere of forming in space with nanometer space, this microballoon had both been preserved the absorption and the photocatalysis performance of nano particle, have bigger bulk again, can reclaim by simple overanxious separation.Can be widely used in processing such as waste water, waste gas.
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| CN 200510065446 CN1846849A (en) | 2005-04-05 | 2005-04-05 | Prepn process of photocatalytic microball for environment treatment |
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| CN 200510065446 CN1846849A (en) | 2005-04-05 | 2005-04-05 | Prepn process of photocatalytic microball for environment treatment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870821A (en) * | 2010-06-12 | 2010-10-27 | 浙江大学 | Preparation method of ZnO-TiO2 composite mildew-proof material |
| CN102164860A (en) * | 2008-05-02 | 2011-08-24 | 阿塞里克股份有限公司 | A photocatalytic nanocomposite material |
| CN103506100A (en) * | 2012-06-19 | 2014-01-15 | 范振天 | Preparation method of photocatalytic composite microspheres for environment treatment |
| CN104353438A (en) * | 2014-11-06 | 2015-02-18 | 无锡普爱德环保科技有限公司 | Compound type carbon dioxide adsorbing agent and preparation method thereof |
-
2005
- 2005-04-05 CN CN 200510065446 patent/CN1846849A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164860A (en) * | 2008-05-02 | 2011-08-24 | 阿塞里克股份有限公司 | A photocatalytic nanocomposite material |
| CN101870821A (en) * | 2010-06-12 | 2010-10-27 | 浙江大学 | Preparation method of ZnO-TiO2 composite mildew-proof material |
| CN103506100A (en) * | 2012-06-19 | 2014-01-15 | 范振天 | Preparation method of photocatalytic composite microspheres for environment treatment |
| CN104353438A (en) * | 2014-11-06 | 2015-02-18 | 无锡普爱德环保科技有限公司 | Compound type carbon dioxide adsorbing agent and preparation method thereof |
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