CN101411982A - Iron modified titanic oxide microsphere photocatalyst as well as method for producing the same and use - Google Patents
Iron modified titanic oxide microsphere photocatalyst as well as method for producing the same and use Download PDFInfo
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- CN101411982A CN101411982A CNA2008102027836A CN200810202783A CN101411982A CN 101411982 A CN101411982 A CN 101411982A CN A2008102027836 A CNA2008102027836 A CN A2008102027836A CN 200810202783 A CN200810202783 A CN 200810202783A CN 101411982 A CN101411982 A CN 101411982A
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Abstract
The invention relates to a photocatalyst for modifying a titania microsphere through iron. Ferric ions are modified on the surface of a titania nanometer crystal grain. The preparation method comprises the following steps: titanium tetraoxide is used as a titanium source; ferric nitrate or ferric chloride is used a ferric source; under electromagnetic stirring at room temperature, a titanium source solution is dripped into an aqueous ferric source solution, is stirred, is added with urea, is continuously stirred, is added with a dispersant, is continuously stirred, is added with ethanol and is continuously stirred to obtain a clean solution; the clean solution is transferred to a high-pressure kettle is sealed and crystallized; a product is filtered, washed, dried and roasted to obtain the photocatalyst for modifying the titania microsphere through iron. The photocatalyst is used for degrading organism under ultraviolet photocatalysis. The photocatalyst has the advantages that the photocatalyst is provided with nanometer crystal with high photocatalytic activity, large specific surface area and small particle dimension, has a unique nucleus-shell structure and is very easy to separate and recycle; the modification of the transition metallic ferric ions is favorable for improving photocatalytic efficiency and absorbing visible light; and the catalyst has high catalytic activity and can fully degrade organic pollutants into water and carbon dioxide.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of iron modified titanic oxide microsphere photocatalyst and manufacture method thereof and purposes, be used for degradation of organic substances under ultraviolet catalytic.
Background technology
TiO
2Photocatalyst material is in the degraded of organic pollution, the purification of water and air, sterilization and sterilization, and fields such as the ecological architectural material prospect that has a very wide range of applications, thereby caused the extensive interest and the concern of countries in the world governments, branch of industry and academia.Over past ten years, the semiconductor light-catalyst material becomes the focus and emphasis of countries in the world scientists study, and more and more about the research paper and the patent of this respect, annual all have thousands of pieces research paper to deliver.In actual applications, TiO
2Catalysis material has been used for fields such as the purifier, self-cleaning glass face coat, antibiotic photocatalysis ceramics face brick of water and air, has produced huge economy, environment and social benefit.
Yet, consider that from practical application and commercialization the activity of titanium dioxide optical catalyst must further improve and improve.In order to reach this purpose, titanium dioxide optical catalyst has high degree of crystallinity, little particle size and high specific area is necessary.In the various methods that prepare titanium dioxide nano-crystal, alcohol-hydro-thermal method is widely adopted, multiple advantage such as equipment less investment, temperature are low because this method has, easy control.Usually the titanium dioxide of preparation is the anatase crystalline form in this way, need not carry out high-temperature heat treatment or only carry out roasting under moderate moisture promptly can be used for light-catalyzed reaction, therefore can not cause the particle of titanium dioxide to become big and specific area declines to a great extent.
The photocatalytic activity of titanium dioxide optical catalyst depends on phase structure and composition, degree of crystallinity, particle size and the specific area etc. of titanium dioxide self.
Applicant of the present invention discloses a kind of titanic oxide microsphere photocatalyst in its disclosure of the Invention CN101015790A, have unique nuclear-shell micro-sphere structure, adopts homogeneous phase alcohol-hydro-thermal method synthetic, and wherein, the titanium source is four titanium oxide.
The modification of metal ion is to TiO
2The photocatalysis performance of series photocatalyst has facilitation preferably.Can make TiO on the one hand
2Excitation wavelength expand to visible region, improve utilization rate to sunshine; On the other hand, can also improve photocatalysis efficiency.It is generally acknowledged ionic radius and Ti
4+Close have the transition metal ions effect that is full of entirely or partly is full of electron configuration and be better than the metal ion with closed shell electron configuration.This mainly is because the electron configuration that is full of or partly is full of entirely has carrier to be carried out the ability that shallow degree is caught, and can effectively prolong the life-span of carrier.Existing report does not relate to existing special appearance, has the photochemical catalyst that transition metal is modified again.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of iron modified titanic oxide microsphere photocatalyst with highlight catalytic active, bigger serface, low particle size.
Another technical problem to be solved by this invention is to provide a kind of preparation method of above-mentioned iron modified titanic oxide microsphere photocatalyst.
A technical problem more to be solved by this invention is to provide a kind of purposes of above-mentioned iron modified titanic oxide microsphere photocatalyst, is used for degradation of organic substances.
The present invention solves the problems of the technologies described above the technical scheme of being taked: a kind of iron modified titanic oxide microsphere photocatalyst, particle diameter is 2～10 μ m, with the titanium dioxide nanocrystalline grain with nucleocapsid structure serves as to form member, the particle diameter of titanium dioxide nanocrystalline grain is 5～15nm, and specific area is 265～334m
2/ g, wherein, the finishing of described titanium dioxide nanocrystalline grain has iron ion.
Concrete, the particle diameter of titanium dioxide nanocrystalline grain can be 5,8,10,12 or 15nm; Specific area can be 265,285,305,325 or 334m
2/ g; The particle diameter of described iron modified titanic oxide microsphere can be 2,4,6,8 or 10 μ m.
Iron modified titanic oxide microsphere photocatalyst of the present invention is have highlight catalytic active, bigger serface and low particle size nanocrystalline, is the micron order functional material of high-specific surface area, relatively is suitable for being directly used in the light degradation organic pollution; This iron modified titanic oxide photochemical catalyst has unique nucleocapsid structure, very easily separates and reclaims, so can fundamentally solve photochemical catalyst and the problem of the thing separation difficulty that is degraded, can improve its absorption at visible region simultaneously, demonstrates excellent industrial application foreground.
At the preparation method of above-mentioned iron modified titanic oxide microsphere photocatalyst, adopt homogeneous phase alcohol-hydro-thermal method synthetic, be the titanium source with four titanium oxide, be source of iron with ferric nitrate or iron chloride, comprise the steps: in regular turn
The first step: under room temperature, electromagnetic agitation, titanium source solution is splashed in the source of iron aqueous solution, stirred 0.5～1 hour, be specifically as follows 0.5,0.6,0.8 or 1 hour;
Second step: add urea, continue to stir 10～30 minutes, be specifically as follows 10,20 or 30 minutes;
The 3rd step: add dispersant, continue to stir 1.5～3 hours, be specifically as follows 1.5,2,2.5 or 3 hours;
The 4th step: add ethanol, continue to stir 2～4 hours, get settled solution, be specifically as follows 2,3 or 4 hours;
The 5th step: settled solution changes in the autoclave and seals, 50～120 ℃ of crystallization 5～24 hours crystallized product, be specifically as follows 50,80 100 or 120 ℃ of following crystallization 5,10,15,20 or 24 hours;
The 6th step: product after filtration, washing, oven dry, 250～650 ℃ of roastings 2～4 hours, obtain iron modified titanic oxide microsphere photocatalyst, be specifically as follows 250,300,350,400,450,500,550,600 or 650 ℃ of following roastings 2,3 or 4 hours.
Can obtain the titanium dioxide optical catalyst that iron is modified easily with preparation method of the present invention, and in the process of organic pollutions such as degradation of phenol, demonstrate superior function far above commercial P25 catalyst with special nucleocapsid structure.
On the basis of such scheme, in the 3rd step, described dispersant is a kind of in glacial acetic acid, oxalic acid, ammonium sulfate, the salt.
On the basis of such scheme, in the 6th step, described oven dry is carried out under vacuum, dries 20～30 hours, is specifically as follows 20,22,24,26,28 or 30 hours.
On the basis of such scheme, the mol ratio of each component is: titanium source: source of iron: ammonium sulfate: urea=1:0.1～1.5:0.1～5:4～20.
Concrete, the mol ratio of each component can be titanium source: source of iron: water: ethanol: ammonium sulfate: urea=1:0.1,0.2,0.5,0.8,1,1.2 or 1.5:0.1,0.5,1,2,3 or 5:4,5,8,10,12,15,18 or 20.
On the basis of such scheme, the concentration of described titanium source solution is 2～4mol/L, and the concentration of the source of iron aqueous solution is 0.5～1.5mol/L.
Concrete, the concentration of titanium source solution (four titanium oxide) can be 2,2.5,3,3.5 or 4mol/L; The concentration of the source of iron aqueous solution (iron chloride or ferric nitrate) can be 0.5,0.8,1.0,1.2 or 1.5mol/L.
Washing in the 6th step for wash with water, ethanol washs.
The iron modified titanic oxide microsphere photocatalyst that obtains in the said method is used for degradation of organic substances under ultraviolet catalytic.
Described organic matter is a kind of in phenol, benzenediol, benzoquinones, methyl orange, the rhodamine B.
Activity to photochemical catalyst provided by the invention can be tested with the following method:
The photocatalytic activity experiment that iron modified titanic oxide microsphere decomposes for oxidation operation in solution is carried out at normal temperatures and pressures:
Iron modified titanic oxide microsphere photocatalyst is joined in the organic aqueous solution, under the ultrasonic wave effect, make suspension, stir the not open close air of going into; Under ultra violet lamp, react.Per sampling half an hour, catalyst is removed with high speed centrifugation.The concentration of surplus solution is analyzed on ultraviolet specrophotometer (Shimadzu, UV2450,270 nanometers).Degradation rate (%)=(residual organic substances concentration/initial organic concentration) * 100.According to efficient liquid phase chromatographic analysis, do not detect the organic existence except that the thing that is degraded, show that organic matter is degraded into water and carbon dioxide fully in course of reaction.
The invention has the beneficial effects as follows:
1, the iron modified titanic oxide photochemical catalyst is have highlight catalytic active, bigger serface and low particle size nanocrystalline, and the micron order functional material for high-specific surface area is suitable for being directly used in the light degradation organic pollution;
2, this iron modified titanic oxide photochemical catalyst has unique nucleocapsid structure, very easily separate and reclaim, so can fundamentally solve photochemical catalyst and the problem of the thing separation difficulty that is degraded, can improve its absorption simultaneously at visible region, demonstrate excellent industrial application foreground;
3, the transition metal iron ion is modified with the raising that is beneficial to photocatalysis efficiency and the absorption of visible light;
4, the iron modified titanic oxide photochemical catalyst has the catalytic activity height, can be degraded to water and carbon dioxide fully to organic pollution, can be applicable in the multiple organic photocatalytic degradation reaction, and degradation rate has great industrial application value all near 100%;
5, the reaction condition gentleness of preparation catalyst, reaction unit is simple, and the preparation efficiency height is low to the purity requirement of the thing that is degraded, be a kind of pervasive multifunctional photocatalysis agent, and plant machinery intensity is big, wear-resistant, scope of application broadness, the recyclable number of times more (greater than 10 times) that utilizes, cost is lower.
Description of drawings
Fig. 1 is the stereoscan photograph of iron modified titanic oxide microsphere catalyst.
Fig. 2 is the transmission electron microscope photo of iron modified titanic oxide microsphere catalyst.
The specific embodiment
Further describe the present invention by the following examples.
Embodiment 1
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, is source of iron with iron chloride, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 10ml (1mol/L) FeCl
3In the aqueous solution, stirred 0.5 hour;
Second step: add urea 40g, continue to stir 10 minutes;
The 3rd step: add ammonium sulfate 0.5g, continue to stir 1.5 hours;
The 4th step: add absolute ethyl alcohol 50ml, continue to stir 2 hours, get settled solution;
The 5th step: settled solution changes in the 200ml autoclave and seals, and takes out after 5 hours 50 ℃ of crystallization;
The 6th step: product after filtration, water washs, ethanol washs, and 80 ℃ of vacuum dryings 24 hours, 250 ℃ of roastings 2 hours, obtains iron modified titanic oxide microsphere photocatalyst, is designated as the 1# catalyst.
Ammonium sulfate in the present embodiment can be used other dispersants, replaces as glacial acetic acid, oxalic acid, salt or rhodamine B, does not do detailed description at this.
Embodiment 2
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with iron chloride, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 20ml (1mol/L) FeCl
3In the aqueous solution, stirred 1 hour;
Second step: add urea 30g, continue to stir 30 minutes;
The 3rd step: add ammonium sulfate 5.0g, continue to stir 3 hours;
The 4th step: add absolute ethyl alcohol 10ml, continue to stir 4 hours, get settled solution;
The 5th step: settled solution changes in the 200ml autoclave and seals, and takes out after 24 hours 100 ℃ of crystallization;
The 6th step: product after filtration, water washs, ethanol washs, and 100 ℃ of vacuum dryings 24 hours, 550 ℃ of roastings 4 hours, obtains iron modified titanic oxide microsphere photocatalyst, is designated as the 2# catalyst.
Embodiment 3
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with iron chloride, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 30ml (1mol/L) FeCl
3In the aqueous solution, stirred 1 hour;
～the six step of second step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 1, is designated as the 3# catalyst.
Embodiment 4
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with iron chloride, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 40ml (1mol/L) FeCl
3In the aqueous solution, stirred 1 hour;
～the six step of second step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 1, is designated as the 4# catalyst.
Embodiment 5
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with iron chloride, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 50ml (1mol/L) FeCl
3In the aqueous solution, stirred 1 hour;
～the six step of second step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 1, is designated as the 5# catalyst.
Embodiment 6
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with the ferric nitrate, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 10ml (1mol/L) Fe (NO
3)
3In the aqueous solution, stirred 1 hour;
～the six step of second step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 1, is designated as the 6# catalyst.
Embodiment 7
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with the ferric nitrate, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 20ml (1mol/L) Fe (NO
3)
3In the aqueous solution, stirred 1 hour;
～the six step of second step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 1, is designated as the 7# catalyst.
Embodiment 8
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with the ferric nitrate, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 30ml (1mol/L) Fe (NO
3)
3In the aqueous solution, stirred 1 hour;
～the five step of second step is with embodiment 2;
The 6th step: product after filtration, water washs, ethanol washs, and 100 ℃ of vacuum dryings 24 hours, 650 ℃ of roastings 4 hours, obtains iron modified titanic oxide microsphere photocatalyst, is designated as the 8# catalyst.
Embodiment 9
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with the ferric nitrate, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 40ml (1mol/L) Fe (NO
3)
3In the aqueous solution, stirred 1 hour;
Second step: with embodiment 2;
The 3rd step: add ammonium sulfate 10.0g, continue to stir 3 hours;
～the six step of the 4th step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 2, is designated as the 9# catalyst.
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with the ferric nitrate, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 50ml (1mol/L) Fe (NO
3)
3In the aqueous solution, stirred 1 hour;
Second step: add urea 10g, continue to stir 30 minutes;
～the six step of the 3rd step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 2, is designated as the 10# catalyst.
Embodiment 11
A kind of preparation method of iron modified titanic oxide microsphere photocatalyst is the titanium source with four titanium oxide, adopts homogeneous phase alcohol-hydro-thermal method synthetic, wherein, is source of iron with iron chloride, comprises the steps: in regular turn
The first step: 12.5ml (3mol/L) TiCl
4Solution splashes into 30ml (1mol/L) FeCl
3In the aqueous solution, stirred 1 hour;
Second step: with embodiment 2;
The 3rd step: add ammonium sulfate 15.0g, continue to stir 3 hours;
～the six step of the 4th step obtains iron modified titanic oxide microsphere photocatalyst with embodiment 2, is designated as the 11# catalyst.
Above-mentioned catalyst is applied to respectively in the different light-catalyzed reactions, and active fructufy is for example following:
Application examples 1
Under 25 ℃, accurately take by weighing 0.5 gram 1# catalyst, it is joined in the phenol solution that 500 ml concns are 0.06 grams per liter then, under the ultrasonic wave effect, make suspension, stir the not open close air (50 ml/min) of going into; Under uviol lamp (365 nanometers, 300 watts) irradiation, react.Take a sample per half an hour 0.5 milliliter, catalyst is removed with high speed centrifugation.The concentration of surplus solution is analyzed on ultraviolet specrophotometer (Shimadzu, UV2450,270 nanometers).
Application examples 2
Under 25 ℃, accurately take by weighing 0.5 gram 2# catalyst, it is joined in the phenol solution that 500 ml concns are 0.06 grams per liter then, the subsequent reactions step is with application examples 1.
Application examples 3
Under 25 ℃, accurately take by weighing 0.5 gram 3# catalyst, then it is joined the hydroquinones aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 4
Under 25 ℃, accurately take by weighing 0.5 gram 4# catalyst, then it is joined the 1,4-benzoquinone aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 5
Under 25 ℃, accurately take by weighing 0.5 gram 5# catalyst, then it is joined the methyl orange aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 6
Under 25 ℃, accurately take by weighing 0.5 gram 6# catalyst, then it is joined the phenol solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 7
Under 25 ℃, accurately take by weighing 0.5 gram 7# catalyst, then it is joined the hydroquinones aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 8
Under 25 ℃, accurately take by weighing 0.5 gram 8# catalyst, then it is joined the methyl orange aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 9
Under 25 ℃, accurately take by weighing 0.5 gram 9# catalyst, then it is joined the hydroquinones aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 10
Under 25 ℃, accurately take by weighing 0.5 gram 10# catalyst, then it is joined the methyl orange aqueous solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Application examples 11
Under 25 ℃, accurately take by weighing 0.5 gram 11# catalyst, then it is joined the phenol solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
Reference examples
Under 25 ℃, accurately take by weighing 0.5 gram commercial catalysts Degussa P25, then it is joined the phenol solution that 500 ml concns are 0.06 grams per liter, the subsequent reactions step is with application examples 1.
With the active testing result of application examples 1～11 and reference examples, the reaction condition and the optimum that are adopted are listed in the table 1.
The optimum reaction condition of the various iron modified titanic oxide photochemical catalysts of table 1 and active result
| Catalyst | Reaction temperature (℃) | Reaction time (h) | Degradation effect of organic compound (%) | |
| Application examples 1 | 1# | 25 | 1.5 | 96.4 |
| Application examples 2 | 2# | 25 | 1.5 | 93.8 |
| Application examples 3 | 3# | 25 | 1.5 | 99.0 |
| Application examples 4 | 4# | 25 | 1.5 | 99.0 |
| Application examples 5 | 5# | 25 | 0.5 | 97.4 |
| Application examples 6 | 6# | 25 | 1.5 | 94.5 |
| Application examples 7 | 7# | 25 | 1.5 | 83.5 |
| Application examples 8 | 8# | 25 | 0.5 | 87.3 |
| Application examples 9 | 9# | 25 | 1.5 | 96.0 |
| Application examples 10 | 10# | 25 | 0.5 | 85.7 |
| Application examples 11 | 11# | 25 | 1.5 | 96.0 |
| Reference examples | Degussa?P25 | 25 | 1.5 | 61.1 |
Experimental result according to last table shows, the present invention is used for the iron modified titanic oxide microsphere photocatalyst of degradable organic pollutant and has all obtained result preferably in the light-catalyzed reaction to multiple organic pollution, far above the degradation capability of commercial catalysts Degussa P25, be a kind of efficient, pervasive catalysis material.
Claims (8)
1, a kind of iron modified titanic oxide microsphere photocatalyst, particle diameter are 2～10 μ m, serve as to form member with the titanium dioxide nanocrystalline grain with nucleocapsid structure, and the particle diameter of titanium dioxide nanocrystalline grain is 5～15nm, and specific area is 265～334m
2/ g is characterized in that: the finishing of described titanium dioxide nanocrystalline grain has iron ion.
2, at the preparation method of the described iron modified titanic oxide microsphere photocatalyst of claim 1, adopt homogeneous phase alcohol-hydro-thermal method synthetic, be the titanium source with four titanium oxide, be source of iron with ferric nitrate or iron chloride, comprise the steps: in regular turn
The first step: under room temperature, electromagnetic agitation, titanium source solution is splashed in the source of iron aqueous solution, stirred 0.5～1 hour;
Second step: add urea, continue to stir 10～30 minutes;
The 3rd step: add dispersant, continue to stir 1.5～3 hours;
The 4th step: add ethanol, continue to stir 2～4 hours, get settled solution;
The 5th step: settled solution changes in the autoclave and seals, 50～120 ℃ of crystallization 5～24 hours, crystallized product;
The 6th the step: product after filtration, the washing, the oven dry, 250～650 ℃ of roastings 2～4 hours, obtain iron modified titanic oxide microsphere photocatalyst.
3, the preparation method of iron modified titanic oxide microsphere photocatalyst according to claim 2 is characterized in that: in the 3rd step, described dispersant is a kind of in glacial acetic acid, oxalic acid, ammonium sulfate, the salt.
4, the preparation method of iron modified titanic oxide microsphere photocatalyst according to claim 2 is characterized in that: in the 6th step, described oven dry is carried out under vacuum, dries 20～30 hours.
5, the preparation method of iron modified titanic oxide microsphere photocatalyst according to claim 2 is characterized in that: the mol ratio of each component is: titanium source: source of iron: ammonium sulfate: urea=1:0.1～1.5:0.1～10:4～20.
6, according to the preparation method of claim 2 or 5 described iron modified titanic oxide microsphere photocatalysts, it is characterized in that: the concentration of described titanium source solution is 2～4mol/L, and the concentration of the source of iron aqueous solution is 0.5～1.5mol/L.
7,, be used for degradation of organic substances under ultraviolet catalytic at the purposes of the described iron modified titanic oxide microsphere photocatalyst of claim 1.
8, the purposes of iron modified titanic oxide microsphere photocatalyst according to claim 7 is characterized in that: described organic matter is a kind of in phenol, benzenediol, benzoquinones, methyl orange, the rhodamine B.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430405A (en) * | 2011-09-15 | 2012-05-02 | 复旦大学 | Loaded bimetallic nano-catalyst used for benzoic acid and sodium salt preparation as well as its preparation method |
| CN107803202A (en) * | 2017-11-14 | 2018-03-16 | 江苏师范大学 | A kind of preparation method of Cs/Ti Fe composite photo-catalysts |
| CN117659546A (en) * | 2023-12-08 | 2024-03-08 | 潍坊华南环保科技有限公司 | Ecological degradable mulching film and preparation method thereof |
-
2008
- 2008-11-14 CN CNA2008102027836A patent/CN101411982A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430405A (en) * | 2011-09-15 | 2012-05-02 | 复旦大学 | Loaded bimetallic nano-catalyst used for benzoic acid and sodium salt preparation as well as its preparation method |
| CN107803202A (en) * | 2017-11-14 | 2018-03-16 | 江苏师范大学 | A kind of preparation method of Cs/Ti Fe composite photo-catalysts |
| CN107803202B (en) * | 2017-11-14 | 2021-01-19 | 江苏师范大学 | Preparation method of Cs/Ti-Fe composite photocatalyst |
| CN117659546A (en) * | 2023-12-08 | 2024-03-08 | 潍坊华南环保科技有限公司 | Ecological degradable mulching film and preparation method thereof |
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