CN102357358A - Preparation method for titanium oxide photocatalyst adopting carbon powder as load - Google Patents
Preparation method for titanium oxide photocatalyst adopting carbon powder as load Download PDFInfo
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- CN102357358A CN102357358A CN2011102149426A CN201110214942A CN102357358A CN 102357358 A CN102357358 A CN 102357358A CN 2011102149426 A CN2011102149426 A CN 2011102149426A CN 201110214942 A CN201110214942 A CN 201110214942A CN 102357358 A CN102357358 A CN 102357358A
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Abstract
The present invention provides a preparation method for a titanium oxide photocatalyst adopting carbon powder as a load. The technical scheme of the preparation method is that: the preparation method comprises the following steps: (1), adopting waste carbon powder generated from biomass fuel producing or power generation; carrying out water washing and drying for the waste carbon powder; placed the dried waste carbon powder in a pre-treatment agent containing a silicon oxide material to carry out an immersing pre-treatment; (2), adding metatitanic acid, concentrated sulfuric acid to a reactor, and heating until the metatitanic acid is dissolved; adding water to carry out dilution until the pH value is 0.8-1.2; (3), placing the pre-treated waste carbon powder in the resulting metatitanic acid solution; heating and stirring until the color of the carbon powder changes into white from black; stopping the reaction; (4), carrying out filtering, drying by baking, and calcination for the white material generated from the step (3) to obtain the titanium oxide photocatalyst adopting the carbon powder as the load. With the method provided by the present invention, the prepared titanium oxide photocatalyst adopting the carbon powder as the load has a good waste water treatment effect, and the method has characteristics of simple process and low cost.
Description
Technical field
The present invention relates to the photochemical catalyst field, specifically relating to a kind of is the preparation method of the titania photocatalyst of load with the carbon dust.
Background technology
In recent years, along with the deterioration of living environment, caused the concern that people are huge with semiconductor light-catalyst light degradation pollutant technology.Because titanium dioxide has advantages such as chemical stability is good, photocatalysis efficiency is high, and cost is low, nontoxic, has become home and abroad environment scientific worker's research focus.Since common flour powder titanium dioxide in use exist photolytic activity not high, separate and reclaim difficulty and generation secondary pollution problems, so titanium dichloride load draws attention gradually.The effect of titanium dioxide optical catalyst carrier is mainly reflected in: 1, fixedly titanium dioxide, prevent to run off, be easy to reclaim and improve the utilization rate of titanium dioxide; 2, increase the whole specific area of titanium dioxide optical catalyst; 3, improve photocatalytic activity,, help the separation of EH+ and increase absorption, realize the regeneration of carrier simultaneously reactant because some carrier can interact with titanium dioxide; 4, improve the light source utilization rate, after titanium dioxide was processed film, catalyst surface receives light-struck catalyst particle number to be increased; 5, catalyst is fixed with carrier, be convenient to process the photo catalysis reactor of different shape.
So, provide a kind of good load that optically catalytic TiO 2 degradation of contaminant technology is had crucial meaning.
Summary of the invention
It is the preparation method of the titania photocatalyst of load with the carbon dust that main purpose of the present invention provides a kind of, and this method technology is simple, with low cost.
In order to realize the foregoing invention purpose, the technical scheme that the present invention adopted is: a kind of is the preparation method of the titania photocatalyst of load with the carbon dust, comprises following operating procedure:
(1), get and produce the discarded object carbon dust that biomass fuel or generating produce, through washing, drying is placed in the pretreating agent of silicon oxide-containing material soaks preliminary treatment;
(2), metatitanic acid, the concentrated sulfuric acid are put in the reactor, and after heating made the metatitanic acid dissolving, thin up to pH value was 0.8-1.2;
(3), will place above-mentioned meta-titanium acid solution through pretreated discarded object carbon dust, heating is also stirred, and treats that toner color is bleached by black, stops reaction.
(4), will operate roasting behind the whiteness filtering drying that reaction is produced in (3), can obtain with the carbon dust is the titania photocatalyst of load.
What obtain according to preparation method of the present invention is that its treatment effect of titania photocatalyst of load is good with the carbon dust: every liter of waste water is thrown under 5 hours conditions of 1 gram, natural light irradiation, and COD and NH3-N clearance reach 77.42% and 80.13% respectively.
Description of drawings
Fig. 1 coats titanium oxide SEM photo through the waterglass preliminary treatment;
Fig. 2 is through the prepared loading titanium oxide photochemical catalyst of waterglass preliminary treatment XRD style.
The specific embodiment
A kind of is the preparation method of the titania photocatalyst of load with the carbon dust, comprises following operation:
(1), gets the discarded object carbon dust of producing biomass fuel or generating generation; Through washing; Drying, the carbon dust of producing biomass fuel here and being produced mainly are that wood chip, rice husk and stalk are resulting when being the raw material production biomass fuel, and carbon dust just has been removed through washing its surface impurity; Be placed on then in the pretreating agent of silicon oxide-containing material and soak preliminary treatment, thereby improve carbon dust surface hydrophilic groups density; (2), metatitanic acid, the concentrated sulfuric acid are put in the reactor, and after heating made the metatitanic acid dissolving, thin up to pH value was 0.8-1.2; (3), will place above-mentioned meta-titanium acid solution through pretreated discarded object carbon dust, heating is also stirred, and treats that toner color is bleached by black, stops reaction, its objective is generating TiO (OH) through preliminary treatment carbon dust surface
2Clad; (4), will operate behind the whiteness filtering drying that reaction is produced in (3) at 400-600 ℃ of roasting 0.5-2 hour, make TiO (OH)
2Clad becomes anatase titanium dioxide TiO
2Clad, can obtain with the carbon dust is the titania photocatalyst of load.
Drying condition is in 100 ℃ of air ambients dry 2-4 hour in the said step (1).Thereby moisture subsidiary in the time of will washing is removed.
The silicon oxide-containing material is waterglass or Ludox in the said step (1); Wherein the mass ratio of silica in the silicon oxide-containing material and the carbon in the carbon dust is 0.5-10%.Under this condition, carbon dust surface hydrophilic groups density reaches optimal value, helps making the titania photocatalyst of function admirable.
The mass ratio of the concentrated sulfuric acid and metatitanic acid is 3: 1 in the said step (2).Like this metatitanic acid is dissolved in the concentrated sulfuric acid fully, dilution, and to be used for follow-up be the reaction of the titania photocatalyst of load with the carbon dust.
Preferred thin up to pH value is 1 in the said step (2).Thereby be more conducive to generate TiO (OH) on the carbon dust surface
2The reaction of clad.
The mass ratio of discarded object carbon dust and meta-titanium acid solution is 0.1-10 in the said step (3).What obtain under this condition is the titania photocatalyst of load with the carbon dust, and its surface has good light transmittance and TiO
2Have stronger adhesion between particle, specific area is big.
Embodiment 1
(1), gets the discarded object carbon dust that produces when producing biomass fuel; Through washing; Drying was placed in the waterglass pretreating agent and soaks preliminary treatment in 2 hours in 100 ℃ of air ambients, and wherein the mass ratio of silica in the silicon oxide-containing material and the carbon in the carbon dust is 0.5%;
(2), be that 3: 1 the concentrated sulfuric acid and metatitanic acid places reactor with mass ratio, and the water-bath heating makes the metatitanic acid dissolving, thin up to pH value is 0.8 then;
(3), will place above-mentioned meta-titanium acid solution through pretreated discarded object carbon dust, wherein the mass ratio of discarded object carbon dust and meta-titanium acid solution is 0.1, heating is also stirred, and treats that toner color is bleached by black, stops reaction;
(4), will operate behind the whiteness filtering drying that reaction is produced in (3) 400 ℃ of roastings 2 hours, can obtain with the carbon dust is the titania photocatalyst of load.
Embodiment 2
(1), get the discarded object carbon dust that generating produces, through washing, in 100 ℃ of air ambients, soak preliminary treatment in the dry pretreating agent that was placed on Ludox in 4 hours, wherein the mass ratio of silica in the silicon oxide-containing material and the carbon in the carbon dust is 10%;
(2), be that 3: 1 the concentrated sulfuric acid and metatitanic acid places reactor with mass ratio, and the water-bath heating makes the metatitanic acid dissolving, thin up to pH value is 1.2 then;
(3), will place above-mentioned meta-titanium acid solution through pretreated discarded object carbon dust, wherein the mass ratio of discarded object carbon dust and meta-titanium acid solution is 10, heating is also stirred, and treats that toner color is bleached by black, stops reaction;
(4), will operate behind the whiteness filtering drying that reaction is produced in (3) 600 ℃ of roastings 0.5 hour, can obtain with the carbon dust is the titania photocatalyst of load.
Embodiment 3
(1), gets the discarded object carbon dust that produces when producing biomass fuel; Through washing; In 100 ℃ of air ambients, soak preliminary treatment in the dry pretreating agent that was placed on waterglass in 3 hours, wherein the mass ratio of silica in the silicon oxide-containing material and the carbon in the carbon dust is 5%;
(2), be that 3: 1 the concentrated sulfuric acid and metatitanic acid places reactor with mass ratio, and the water-bath heating makes the metatitanic acid dissolving, thin up to pH value is 1 then;
(3), will place above-mentioned meta-titanium acid solution through pretreated discarded object carbon dust, wherein the mass ratio of discarded object carbon dust and meta-titanium acid solution is 5, heating is also stirred, and treats that toner color is bleached by black, stops reaction;
(4), will operate behind the whiteness filtering drying that reaction is produced in (3) 500 ℃ of roastings 1 hour, can obtain with the carbon dust is the titania photocatalyst of load.
Use that above-mentioned examples of implementation prepare with carbon dust its treatment effect of titania photocatalyst as load: every liter of waste water is thrown under 5 hours conditions of 1 gram, natural light irradiation, and COD and NH3-N clearance reach to 77.42% and 80.13% respectively.
Form complete, as shown in Figure 1 through waterglass preliminary treatment titanium oxide coating.
Characterize through XRD, XRD style shown in Figure 2 and the contrast of PDF21-2172 card show that rete belongs to anatase titanium dioxide.
Claims (6)
1. one kind is the preparation method of the titania photocatalyst of load with the carbon dust, comprises following operating procedure:
(1), get and produce the discarded object carbon dust that biomass fuel or generating produce, through washing, drying is placed in the pretreating agent of silicon oxide-containing material soaks preliminary treatment;
(2), metatitanic acid, the concentrated sulfuric acid are put in the reactor, and after heating made the metatitanic acid dissolving, thin up to pH value was 0.8-1.2;
(3), will place above-mentioned meta-titanium acid solution through pretreated discarded object carbon dust, heating is also stirred, and treats that toner color is bleached by black, stops reaction;
(4), will operate behind the whiteness filtering drying that reaction is produced in (3) at 400-600 ℃ of roasting 0.5-2 hour, can obtain with the carbon dust is the titania photocatalyst of load.
2. according to claim 1 a kind of be the preparation method of the titania photocatalyst of load with the carbon dust, it is characterized in that: drying condition is in 100 ℃ of air ambients dry 2-4 hour in the said step (1).
3. according to claim 1 a kind of be the preparation method of the titania photocatalyst of load with the carbon dust, it is characterized in that: the silicon oxide-containing material is waterglass or Ludox in the said step (1); Wherein the mass ratio of silica in the silicon oxide-containing material and the carbon in the carbon dust is 0.5-10%.
4. according to claim 1 a kind of be the preparation method of the titania photocatalyst of load with the carbon dust, it is characterized in that: the mass ratio of the concentrated sulfuric acid and metatitanic acid is 3: 1 in the said step (2).
5. according to claim 1 a kind of be the preparation method of the titania photocatalyst of load with the carbon dust, it is characterized in that: preferred thin up to pH value is 1 in the said step (2).
6. according to claim 1 a kind of be the preparation method of the titania photocatalyst of load with the carbon dust, it is characterized in that: the mass ratio of discarded object carbon dust and meta-titanium acid solution is 0.1-10 in the said step (3).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238059A (en) * | 2016-07-13 | 2016-12-21 | 中国科学院化学研究所 | A kind of remove the composite photo-catalyst of arsenic from underwater, preparation method, method for purifying water and system |
| CN112125676A (en) * | 2020-09-10 | 2020-12-25 | 广东欧文莱陶瓷有限公司 | Transparent ceramic and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4240692C2 (en) * | 1992-12-03 | 1995-09-07 | Leuna Werke Gmbh | Oxidation catalyst made of activated charcoal titanium silicalite |
| CN101780952A (en) * | 2010-03-26 | 2010-07-21 | 上海交通大学 | Method for preparing loading functional oxide porous carbon |
| CN102019176A (en) * | 2010-12-16 | 2011-04-20 | 海宁安捷复合材料有限责任公司 | Method for preparing basalt fiber-based TiO2 photocatalytic film |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4240692C2 (en) * | 1992-12-03 | 1995-09-07 | Leuna Werke Gmbh | Oxidation catalyst made of activated charcoal titanium silicalite |
| CN101780952A (en) * | 2010-03-26 | 2010-07-21 | 上海交通大学 | Method for preparing loading functional oxide porous carbon |
| CN102019176A (en) * | 2010-12-16 | 2011-04-20 | 海宁安捷复合材料有限责任公司 | Method for preparing basalt fiber-based TiO2 photocatalytic film |
Non-Patent Citations (1)
| Title |
|---|
| 王玉萍等: "TiO2/活性炭负载光催化剂的制备与光催化性能", 《环境科学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238059A (en) * | 2016-07-13 | 2016-12-21 | 中国科学院化学研究所 | A kind of remove the composite photo-catalyst of arsenic from underwater, preparation method, method for purifying water and system |
| CN112125676A (en) * | 2020-09-10 | 2020-12-25 | 广东欧文莱陶瓷有限公司 | Transparent ceramic and preparation method thereof |
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