CN102357358B - 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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- CN102357358B CN102357358B CN 201110214942 CN201110214942A CN102357358B CN 102357358 B CN102357358 B CN 102357358B CN 201110214942 CN201110214942 CN 201110214942 CN 201110214942 A CN201110214942 A CN 201110214942A CN 102357358 B CN102357358 B CN 102357358B
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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 relate to a kind of preparation method of the titania photocatalyst take carbon dust as load.
Background technology
In recent years, along with the deterioration of living environment, caused with semiconductor light-catalyst light degradation pollutant technology the concern that people are huge.Because titanium dioxide has the advantages such as chemical stability is good, photocatalysis efficiency is high, and cost is low, nontoxic, become home and abroad environment scientific worker's study hotspot.Due to 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 from running off, being easy to reclaim and improve the utilization rate of titanium dioxide; 2, increase the specific area of titanium dioxide optical catalyst integral body; 3, improve photocatalytic activity, because some carrier can interact with titanium dioxide, be conducive to the separation of EH+ and increase to the absorption of reactant, realize simultaneously the regeneration of carrier; 4, improve the light source utilization rate, after titanium dioxide was made film, catalyst surface is subject to light-struck catalyst particle number to be increased; 5, catalyst is fixed with carrier, be convenient to make the photo catalysis reactor of various shapes.
So, provide a kind of good load to optically catalytic TiO 2 degradation of contaminant technology, very important meaning to be arranged.
Summary of the invention
Main purpose of the present invention is to provide a kind of preparation method of the titania photocatalyst take carbon dust as load, and the method technique is simple, and is with low cost.
In order to realize the foregoing invention purpose, the technical solution adopted in the present invention is: a kind of preparation method of the titania photocatalyst take carbon dust as load 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 carries out dipping pretreatment;
(2), metatitanic acid, the concentrated sulfuric acid are put in reactor, and after heating made the metatitanic acid dissolving, being diluted with water to pH value was 0.8-1.2;
(3), pretreated discarded object carbon dust is placed in above-mentioned meta-titanium acid solution, heat and stir, treating that toner color is bleached by black, stops reaction.
(4), will operate roasting after the whiteness filtering drying that reaction produces in (3), can obtain the titania photocatalyst take carbon dust as load.
Its treatment effect of the titania photocatalyst take carbon dust as load that obtains according to preparation method of the present invention is good: every liter of waste water is thrown under 5 hours conditions of 1 gram, natural light irradiation, and COD and NH3-N clearance reach respectively 77.42% and 80.13%.
Description of drawings
Fig. 1 coats titanium oxide SEM photo through the waterglass pretreatment;
Fig. 2 is through the prepared loading titanium oxide photochemical catalyst of waterglass pretreatment XRD style.
The specific embodiment
A kind of preparation method of the titania photocatalyst take carbon dust as load comprises following operation:
(1), get the discarded object carbon dust of producing biomass fuel or generating generation, through washing, drying, resulting when producing carbon dust that biomass fuel produces here and be mainly wood chip, rice husk and stalk and be raw material and producing biomass fuel, carbon dust just has been removed through washing its surface impurity; Then be placed in the pretreating agent of silicon oxide-containing material and carry out dipping pretreatment, thereby improve carbon dust surface hydrophilic groups density; (2), metatitanic acid, the concentrated sulfuric acid are put in reactor, and after heating made the metatitanic acid dissolving, being diluted with water to pH value was 0.8-1.2; (3), pretreated discarded object carbon dust is placed in above-mentioned meta-titanium acid solution, heat and stir, treating that toner color is bleached by black, stopping reaction, its objective is through pretreatment carbon dust Surface Creation TiO (OH)
2Clad; (4), will operate after the whiteness filtering drying that reaction produces in (3) at 400-600 ℃ of roasting 0.5-2 hour, make TiO (OH)
2Clad becomes anatase titanium dioxide TiO
2Clad can obtain the titania photocatalyst take carbon dust as load.
Drying condition is in 100 ℃ of air ambients dry 2-4 hour in described step (1).Thereby moisture subsidiary in the time of washing is removed.
In described step (1), the silicon oxide-containing material is waterglass or Ludox; Wherein the mass ratio of the silica in the silicon oxide-containing material and the carbon in carbon dust is 0.5-10%.Under this condition, carbon dust surface hydrophilic groups density reaches optimal value, is conducive to make the titania photocatalyst of function admirable.
In described step (2), the mass ratio of the concentrated sulfuric acid and metatitanic acid is 3: 1.Like this metatitanic acid is dissolved in the concentrated sulfuric acid fully, dilutes, and be used for the reaction of the follow-up titania photocatalyst take carbon dust as load.
Preferably being diluted with water to the pH value in described step (2) is 1.Thereby be more conducive at carbon dust Surface Creation TiO (OH)
2The reaction of clad.
In described step (3), the mass ratio of discarded object carbon dust and meta-titanium acid solution is 0.1-10.The titania photocatalyst take carbon dust as load that obtains under this condition, its surface has good light transmission and TiO
2Have stronger adhesion between particle, specific area is large.
Embodiment 1
(1), get the discarded object carbon dust that produces when producing biomass fuel, through washing, drying was carried out dipping pretreatment in being placed on the waterglass pretreating agent in 2 hours in 100 ℃ of air ambients, and wherein the mass ratio of the silica in the silicon oxide-containing material and the carbon in carbon dust is 0.5%;
(2), be that the concentrated sulfuric acid and the metatitanic acid of 3: 1 is placed in reactor with mass ratio, and heating water bath makes the metatitanic acid dissolving, then being diluted with water to the pH value is 0.8;
(3), pretreated discarded object carbon dust is placed in above-mentioned meta-titanium acid solution, wherein the mass ratio of discarded object carbon dust and meta-titanium acid solution is 0.1, heats and stirs, and treats that toner color is bleached by black, stops reaction;
(4), will operate after the whiteness filtering drying that reaction produces in (3) 400 ℃ of roastings 2 hours, can obtain the titania photocatalyst take carbon dust as load.
Embodiment 2
(1), get the discarded object carbon dust that generating produces, through washing, carry out dipping pretreatment in the dry pretreating agent that was placed on Ludox in 4 hours in 100 ℃ of air ambients, wherein the mass ratio of the silica in the silicon oxide-containing material and the carbon in carbon dust is 10%;
(2), be that the concentrated sulfuric acid and the metatitanic acid of 3: 1 is placed in reactor with mass ratio, and heating water bath makes the metatitanic acid dissolving, then being diluted with water to the pH value is 1.2;
(3), pretreated discarded object carbon dust is placed in above-mentioned meta-titanium acid solution, wherein the mass ratio of discarded object carbon dust and meta-titanium acid solution is 10, heats and stirs, and treats that toner color is bleached by black, stops reaction;
(4), will operate after the whiteness filtering drying that reaction produces in (3) 600 ℃ of roastings 0.5 hour, can obtain the titania photocatalyst take carbon dust as load.
Embodiment 3
(1), get the discarded object carbon dust that produces when producing biomass fuel, through washing, carry out dipping pretreatment in the dry pretreating agent that was placed on waterglass in 3 hours in 100 ℃ of air ambients, wherein the mass ratio of the silica in the silicon oxide-containing material and the carbon in carbon dust is 5%;
(2), be that the concentrated sulfuric acid and the metatitanic acid of 3: 1 is placed in reactor with mass ratio, and heating water bath makes the metatitanic acid dissolving, then being diluted with water to the pH value is 1;
(3), pretreated discarded object carbon dust is placed in above-mentioned meta-titanium acid solution, wherein the mass ratio of discarded object carbon dust and meta-titanium acid solution is 5, heats and stirs, and treats that toner color is bleached by black, stops reaction;
(4), will operate after the whiteness filtering drying that reaction produces in (3) 500 ℃ of roastings 1 hour, can obtain the titania photocatalyst take carbon dust as load.
Its treatment effect of the titania photocatalyst take carbon dust as load for preparing with above-mentioned examples of implementation: every liter of waste water is thrown under 5 hours conditions of 1 gram, natural light irradiation, and COD and NH3-N clearance reach respectively to 77.42% and 80.13%.
Form through waterglass pretreatment titanium oxide coating complete, as shown in Figure 1.
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. the preparation method of the titania photocatalyst take carbon dust as load 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 carries out dipping pretreatment;
(2), metatitanic acid, the concentrated sulfuric acid are put in reactor, and after heating made the metatitanic acid dissolving, being diluted with water to pH value was 0.8-1.2;
(3), pretreated discarded object carbon dust is placed in above-mentioned meta-titanium acid solution, heat and stir, treating that toner color is bleached by black, stops reaction;
(4), will operate after the whiteness filtering drying that reaction produces in (3) at 400-600 ℃ of roasting 0.5-2 hour, can obtain the titania photocatalyst take carbon dust as load.
2. the preparation method of a kind of titania photocatalyst take carbon dust as load according to claim 1 is characterized in that: in described step (1), drying condition is in 100 ℃ of air ambients dry 2-4 hour.
3. the preparation method of a kind of titania photocatalyst take carbon dust as load according to claim 1 is characterized in that: in described step (1), the silicon oxide-containing material is waterglass or Ludox; Wherein the mass ratio of the silica in the silicon oxide-containing material and the carbon in carbon dust is 0.5-10%.
4. the preparation method of a kind of titania photocatalyst take carbon dust as load according to claim 1 is characterized in that: in described step (2), the mass ratio of the concentrated sulfuric acid and metatitanic acid is 3: 1.
5. the preparation method of a kind of titania photocatalyst take carbon dust as load according to claim 1, it is characterized in that: preferably being diluted with water to the pH value in described step (2) is 1.
6. the preparation method of a kind of titania photocatalyst take carbon dust as load according to claim 1 is characterized in that: in described step (3), the mass ratio of discarded object carbon dust and meta-titanium acid solution is 0.1-10.
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| 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 (2)
| Title |
|---|
| TiO2/活性炭负载光催化剂的制备与光催化性能;王玉萍等;《环境科学学报》;20050531;第25卷(第05期);611-617 * |
| 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》.2005,第25卷(第05期),611-617. |
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