CN103506100A - Preparation method of photocatalytic composite microspheres for environment treatment - Google Patents
Preparation method of photocatalytic composite microspheres for environment treatment Download PDFInfo
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- CN103506100A CN103506100A CN201210203277.5A CN201210203277A CN103506100A CN 103506100 A CN103506100 A CN 103506100A CN 201210203277 A CN201210203277 A CN 201210203277A CN 103506100 A CN103506100 A CN 103506100A
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Abstract
The invention discloses a preparation method of photocatalytic composite microspheres for environment treatment. Nano-spatial cross-linked microspheres are formed through a cross-linking reaction of nanometer titanium dioxide and zinc oxide having photocatalytic activity and composite photocatalytic materials thereof as base materials by adopting an organic-inorganic composite cross-linking agent, still have the high adsorption and photocatalysis performances of a nanometer photocatalysis material, have a certain space dimension and are convenient to separate and recover, so the environment photocatalysis treatment efficiency is improved. The preparation method substantially widens the application range of the photocatalytic environment treatment and reduces the treatment cost.
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, wherein take nano titanium oxide again as topmost research object, since the employing TiO2 photocatalytic degradation biphenyl such as Carey in 1976 and askarel, the titanium dioxide of take is that main photocatalysis technology obtains domestic and international extensive concern.
For making TiO2 catalysis material aspect environmental protection, particularly sewage treatment area obtains practical application, and people have adopted several different methods, mainly contain:
(1) by TiO2 photocatalysis film: utilize sol-gal process, TiO2 catalysis material is attached to the surface of object at formative stage not, as glass, porous ore etc., then at high temperature calcine, complete the moulding of TiO2 catalysis material, and then formed one deck TiO2 photocatalysis film at body surface, and allow sewage flow through from film surface, auxiliary ultraviolet light carries out the effect of photocatalysis Decomposition pollutant.
(2) with TiO2 catalysis material, make ceramic material microballoon: utilize the methods such as high-temperature roasting or assistant depositing, by reaction, TiO2 catalysis material is attached to ceramic microsphere surface, make the microballoon of photocatalysis coating, with these microballoons, swim in sewage, reach the object of Adsorption and decomposition pollutant.
(3) directly photocatalysis nano material is scattered in pollutant, by photocatalysis Decomposition pollutant.
(1) (2) are in the method for large particle surface loaded nano-photocatalyst material above, the material that the most of space of system is not had photocatalytic activity takies, not only cause space waste, also affect light application efficiency, make the wastewater treatment efficiency of unit space lower; (3) although method photocatalysis treatment efficiency improve, Nanodispersion reclaims difficulty and causes high cost, cannot practical application.
Summary of the invention
For the deficiency of prior art, goal of the invention of the present invention is to provide a kind of preparation method of novel nano-photo catalytic complex microsphere, improves the service efficiency of nano-photocatalyst material aspect environmental treatment; Effectively nano-space and with the separated recyclability of solvent; The photocatalysis treatment ability of unit space, reduces photocatalysis treatment cost.
For achieving the above object, the present invention adopts nano-photocatalyst material list dispersing composite bodies system, by organic-inorganic multiple crosslinking agent operation technique, and preparation hollow nanometer adherend particulate, the method comprises the following steps:
A, nano-photocatalyst material is made in alcohol water mixed solvent to nano particle monodisperse system;
B, under agitation organic-inorganic multiple crosslinking agent is added in 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%;
C, the mixed dispersion liquid heat drying that step B is obtained, wherein heating-up temperature is between 100～200 ℃, and the heat time was between 0.5～5 hour;
D, the cross-linking products that step C is obtained are ground into and require big or small particulate.
The present invention is by selecting suitable crosslinking agent, nano-photocatalyst material is bonded to the bulky grain microballoon with nano-space structure, be applied in environmental treatment, product is compared with common nano-photocatalyst material, there is better separated recyclability, in comparing unit volume with load type photocatalytic material, have more can applying nano space, light application efficiency is also greatly improved.Make environmental treatment range of application more extensive, photocatalysis treatment cost also greatly reduces.
The specific embodiment
A kind of preparation method of the photocatalysis complex microsphere for environmental treatment, the photocatalysis nano materials such as nano titanium oxide, nano zine oxide of take are base-material, by the crosslinked action of organic-inorganic multiple crosslinking agent, nano-photocatalyst material is cross-linked bonding, dry crosslinked under certain heating-up temperature again, pulverize granulation and form the photocatalysis composite particles with nano-space.In above-mentioned preparation method, described nano-photocatalyst material refers to nano titanium oxide, nano zine oxide and their ion hybridization compounding product, wherein nano titanium oxide comprises that 2 nanometer～100 nanometers have at least one in the titanium dioxide metatitanic acid of photocatalytic activity, nano zine oxide comprises that 2 nanometer～100 nanometers have at least one in the zinc oxide of photocatalytic activity, nano titanium oxide, nano oxidized zinc ion hybridization compounding thing refers to above-mentioned nano titanium oxide, the compound obtaining by ion hydridization, 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 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 of 50 gram of 10 nanometer left and right is distributed in the ethanol water (1: 1 volume ratio) of 50 grams;
B. under stirring condition, slowly add 2.5 grams of KH550, then add 30 grams of potassium silicates, 2 grams of styrene-acrylic resins, then heat drying 2 hours at 120 ℃, obtains block desciccate;
C. block desciccate is ground into needs size, sieves and obtains a certain size particulate;
This particulate has good photocatalytic activity, possesses good separated from solvent simultaneously.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1,50 grams of nano titanium oxides changed into, and 40 grams of nano titanium oxides, 10 grams of 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 1,50 grams of nano titanium oxides in example 1 changed into the nano titanium oxide of 50 grams of iron ion hydridization, 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, and change 2.5 grams of KH550 in example 1 KH560 of 2.5 grams into, other conditions are identical.The photocatalytic activity having had and preferably separated from solvent.
Embodiment 5
Embodiment 5 is with the difference of embodiment 1, changes the styrene-acrylic resin of 2 grams in example 1 into 2 grams of polyvinyl alcohol, and other condition is identical.Finally obtain nano-TiO
2photocatalysis composite particles, the photocatalytic activity having had and preferably separated from solvent.
Claims (4)
1. the preparation method for the photocatalysis complex microsphere of environmental treatment, the photocatalytic nanometer compounds such as nano titanium oxide, nano zine oxide, ion/nanometer titanium dioxide compound of take are stock, by organic-inorganic composite crosslinking, process basic nano-photocatalyst material is bonding, the small porous particle that forms all nanostructureds, is characterized in that: described preparation method comprises the steps:
A, nano-photocatalyst material is made in alcohol water mixed solvent to nano particle monodisperse system;
B, under agitation organic-inorganic multiple crosslinking agent is added in A, thereby obtain homodisperse mixed dispersion liquid, wherein by percentage to the quality, the ratio of nano-photocatalyst material, organic-inorganic multiple crosslinking agent, water and alcohol is respectively 30%～50%, 1%～10%, 10%～50% and 30%～60%;
C, the mixed dispersion liquid heat drying that step B is obtained, wherein heating-up temperature is between 100～200 ℃, and the heat time was between 0.5～5 hour;
D, the cross-linking products that step C is obtained are ground into and require big or small particulate.
2. the preparation method of a kind of photocatalysis complex microsphere for environmental treatment according to claim 1, it is characterized in that, the described basic material of selecting is at least one in nano-titanium oxide, nano zine oxide, ion/nanometer titanium dioxide compound.
3. the preparation method of a kind of photocatalysis complex microsphere for environmental treatment according to claim 1, it is characterized in that, the described organic-inorganic multiple crosslinking agent of selecting 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, alkyd resins.
4. the preparation method of a kind of photocatalysis complex microsphere for environmental treatment according to claim 1, it is characterized in that, the described nano particle with photocatalytic activity has the complex microsphere of nano-space by the bonding composition in space, this microballoon had both been preserved absorption and the photocatalysis performance of nano particle, there is again larger bulk, can reclaim by simple overanxious separation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1846849A (en) * | 2005-04-05 | 2006-10-18 | 海安县拜坡纳米材料有限公司 | Prepn process of photocatalytic microball for environment treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1846849A (en) * | 2005-04-05 | 2006-10-18 | 海安县拜坡纳米材料有限公司 | Prepn process of photocatalytic microball for environment treatment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Application publication date: 20140115 |