CN102069003A - Novel carbonate optical catalyst and preparation method thereof - Google Patents
Novel carbonate optical catalyst and preparation method thereof Download PDFInfo
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- CN102069003A CN102069003A CN2010101156803A CN201010115680A CN102069003A CN 102069003 A CN102069003 A CN 102069003A CN 2010101156803 A CN2010101156803 A CN 2010101156803A CN 201010115680 A CN201010115680 A CN 201010115680A CN 102069003 A CN102069003 A CN 102069003A
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- carbonate
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- photochemical catalyst
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention provides a novel carbonate optical catalyst and a preparation method thereof, relating to the field of semiconductor optical catalysts. In the preparation method, a precipitation method is used to obtain a product by dissolving metal salt in water and adding carbonate for precipitation at room temperature. The preparation method has the advantages of cheap raw materials for production, simple preparation process and favorable performance, and the obtained catalyst can be used as a common engineering material constituent so that great cost advantages can be achieved on the aspects of mounting and application. In the invention, the carbonate is proposed to be used as the optical catalyst, and thus, a practical approach to the application of the optical catalyst in the fields of green home furnishing, indoor air purification, sewage treatment, environmental protection and energy saving is provided.
Description
Technical field:
The present invention relates to the Nano semiconductor photocatalysis field
Background technology:
Along with the development of economic society and the raising of living standards of the people, the problem that threatens mankind itself's existence such as serious environmental pollution has become public's topic widely day by day.Efficient cheap curbing environmental pollution, the particularly new technology of atmosphere and water pollution, the project of countries in the world science and technology emphasis support at present will may become the new bright spot of investment in the lump in nearly ten years just.Industrial wastewater, exhaust-gas treatment, domestic water purifies, and room air processing etc. will become benefits the nation and the people, and brings the frontier of extensive economic benefit simultaneously.The method of handling industrial wastewater at present mainly contains physico-chemical process and bioanalysis.Materialization technology commonly used has the filtering-depositing floatation, in and oxidizing process, lime analytic method, ion-exchange, sorption extraction etc., but these methods all are difficult to avoid secondary pollution, produce a large amount of unmanageable mud, and regeneration expense costliness.Biodegradation mainly utilizes the degradation of bacterium to labile organic compound.But this method cycle is long, take up an area of greatly, and low to the low-concentration organic wastewater treatment effeciency.Air cleaning processing aspect is as adopting charcoal absorption, and ozone or ultraviolet sterilization, anion fine-purification etc. still are in the stage of generalities mostly, the energy consumption height, inefficiency easily causes secondary pollution, can't be really safe and efficient, the air pollution problems inherent in the large-scale ease people living environment.Therefore it is very necessary developing more efficiently depollution of environment treating method.
Japanese scientist Fujishima A. in 1972 etc. find the TiO under ultraviolet light irradiation
2Can produce hydrogen and oxygen by decomposition water on the monocrystalline electrode, open up the New Times of conductor photocatalysis technology.Carey etc. finds under UV-irradiation subsequently, TiO
2Can make the organic compound Polychlorinated biphenyls dechlorination of difficult degradation, photocatalysis is extended to the field of curbing environmental pollution thus.So far, found that the organic compound of more than 3000 kind of difficult degradation can be degraded rapidly by photochemical catalyst under ultraviolet irradiation, particularly dense or when being difficult to degraded with additive method, this technology has remarkable advantages when organic pollution in the environment.As a kind of high-level oxidation technology (AOPs), photocatalysis passes through to produce the hydroxyl radical free radical and the organic matter generation degradation reaction of a large amount of strong oxidizing properties under illumination, thereby is translated into CO rapidly and thoroughly
2, H
2The little molecule that O etc. are harmless.React basic non-selectivity, do not produce secondary pollution.Because it is a kind of physical-chemical processing procedure, the reaction condition gentleness usually to the temperature and pressure no requirement (NR), is easy to be controlled, even can degrades 10
-9The pollutant of level, simple to operate being easy to managed.At present, occupy the TiO of leading position in photocatalysis field
2Based photocatalyst is because chemical property is stable, and asepsis environment-protecting also has excellent photocatalytic performance, and existing American-European countries attempts being used for water treatment.TiO only
2Can only utilize the ultraviolet light that accounts for solar spectrum 4%, and photocatalysis quantum yield not high (～4%), novel high efficiency photocatalyst and the development second generation visible light catalyst emphasis of educational circles's research at present just therefore explored.
Carbonate is mineral common in a kind of earth's crust, and occurring in nature is distributed more widely, and essential mineral has kind more than 80, takes up an area of 1.7% of shell gross weight.Explore the photochemical catalyst of carbonate system,, improve stability and photocatalysis quantum yield, develop novel visible light catalyst and all be significant reducing the photochemical catalyst production cost.
Summary of the invention:
The present invention relates to the new photochemical catalyst of a class---carbonate photochemical catalyst.Purpose be to explore carbonate as photochemical catalyst in the effect aspect the utilizing of sunshine, in the hope of using more common, cheap material, abundant industry is selected.Carbonate is gone up through the stability of being everlasting and is more had superiority than metal oxide, there is a large amount of carbonate in occurring in nature, wherein magnesium is that carbonate is the metal ion carbonate of content second in the earth earth's crust, and in industries such as building, be extensive use of, this makes the carbonate system photochemical catalyst produce and use cost will be very cheap.And bismuthyl carbonate has certain germicidal efficacy simultaneously, and as universally acknowledged green metal, bismuth can not cause secondary pollution to environment.Can estimate that the carbonate photochemical catalyst is in green household, energy-conserving and environment-protective, indoor air purification, fields such as wastewater treatment will have broad application prospects.
The present invention relates to bismuthyl carbonate [Bi
2O
2(CO
3)
3], basic magnesium carbonate [Mg
5(CO
3)
4(OH)
2] depositing synthesis process that waits.Detailed process is: slaine is dissolved in acid, adds the organic matter complexing, add carbonate carbonic acid hydrogen salt or urea liquid or carbon dioxide then and obtain precipitation.Sediment washing drying obtains product.Used reactant is common, the cheap raw material of industry, and process is convenient and swift, and the simple energy consumption of equipment is low, can easier expand as technical grade production.Product has better ultraviolet catalytic performance.
We are by the bismuthyl carbonate of above method preparation, and its particle is a sheet, and specific area is 3m
2/ g.This material is under the ultra violet lamp of 256 nanometers, and product has than excellent photocatalytic performance.
Description of drawings:
Fig. 1 is the photocatalytic activity of room temperature ultraviolet degradation rhodamine B solution.
The specific embodiment
Example 1:
Bismuthyl carbonate (Bi
2O
2CO
3) synthetic
With a certain amount of Bi (NO
3)
35H
2O is dissolved in HNO
3Form settled solution in the aqueous solution, the PVP (PVP) of stoichiometric proportion such as add in above-mentioned clarified solution, the solution that obtains is muddy yellow.Simultaneously with sodium carbonate formation clarified solution soluble in water, Bi (NO
3)
3With the sodium carbonate mol ratio be 1: 1.5.Then, constantly under the magnetic agitation above-mentioned sodium carbonate liquor is dropwise being splashed in the bismuth nitrate solution, the terminal point pH value is 4-8, and gained white opacity liquid stirs 1h, the filtration washing several times, and the oven dry of 70-120 degree obtains the bismuthyl carbonate product.
Example 2:
Basic magnesium carbonate (MgCO3)
4Mg (OH)
24H
2Synthesizing O)
With a certain amount of MgCl
2Water-soluble formation clarified solution such as adds at the PVP (PVP) of stoichiometric proportion in above-mentioned clarified solution, the solution that obtains is muddy yellow.Constantly under the magnetic agitation sodium bicarbonate solution is splashed into above-mentioned MgCl then
2In the solution, MgCl
2With the sodium acid carbonate mol ratio be 1: 2, gained sedimentation and filtration washing, the oven dry of 80-150 degree obtains the basic carbonate magnesium products
Example 3:
The test of ultraviolet catalytic degradation of dye rhodamine B
Ultraviolet light photocatalysis carries out in the self-control Photoreactor.Get the 100mg catalyst and place quartz beaker, add 100mL10 again
-5Rhodamine B solution in the dark stirs 0.5h, places the irradiation of 10W ultraviolet mercury lamp down then.The variation of the apparent absorbance of rhodamine B solution in the solution is measured in the centrifugation of taking a sample per half an hour.The gained experimental result shows that basic bismuth carbonate has more good ultraviolet catalytic activity than bismuth oxide, and basic magnesium carbonate also has certain photocatalytic activity.
Claims (3)
1. novel carbonate photochemical catalyst, this catalyst is a kind of special carbonate nano particle, and resulting granules is a sheet, and specific area is 3m
2/ g.
2. the synthetic method of the carbonate photochemical catalyst of a claim 1, be characterised in that: slaine is dissolved in acid, add organic matter and carry out complexing, add carbonate, bicarbonate, urea or carbon dioxide again and can obtain precipitation, sediment washing drying obtains product.
3. the purposes of a carbonate photochemical catalyst as claimed in claim 1, it is characterized by: this catalyst can be used for air cleaning and wastewater treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101156803A CN102069003A (en) | 2009-11-23 | 2010-01-29 | Novel carbonate optical catalyst and preparation method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910112828.5 | 2009-11-23 | ||
| CN200910112828 | 2009-11-23 | ||
| CN2010101156803A CN102069003A (en) | 2009-11-23 | 2010-01-29 | Novel carbonate optical catalyst and preparation method thereof |
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| CN102069003A true CN102069003A (en) | 2011-05-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201684A (en) * | 2019-05-09 | 2019-09-06 | 中国科学院理化技术研究所 | The method of inorganic semiconductor photocatalytic system chemical recycling of carbon dioxide and organic matter |
| CN110745873A (en) * | 2018-07-23 | 2020-02-04 | 荆门市格林美新材料有限公司 | Mo6+Preparation method of basic nickel carbonate doped microspheres |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058430A (en) * | 2007-05-26 | 2007-10-24 | 大连理工大学 | Method of preparing basic magnesium carbonate three-dimensional nanostructure |
| CN101491769A (en) * | 2009-03-16 | 2009-07-29 | 天津工业大学 | Strontium carbonate with visible photoresponse and preparation method thereof |
-
2010
- 2010-01-29 CN CN2010101156803A patent/CN102069003A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058430A (en) * | 2007-05-26 | 2007-10-24 | 大连理工大学 | Method of preparing basic magnesium carbonate three-dimensional nanostructure |
| CN101491769A (en) * | 2009-03-16 | 2009-07-29 | 天津工业大学 | Strontium carbonate with visible photoresponse and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| YAN ZHENG ET AL.: "Synthetic Bi2O2CO3 nanostructures: Novel photocatalyst with controlled special surface exposed", 《JOURNAL OF MOLECULAR CATALYSIS A: HEMICAL》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745873A (en) * | 2018-07-23 | 2020-02-04 | 荆门市格林美新材料有限公司 | Mo6+Preparation method of basic nickel carbonate doped microspheres |
| CN110201684A (en) * | 2019-05-09 | 2019-09-06 | 中国科学院理化技术研究所 | The method of inorganic semiconductor photocatalytic system chemical recycling of carbon dioxide and organic matter |
| CN110201684B (en) * | 2019-05-09 | 2022-12-02 | 中国科学院理化技术研究所 | Method for converting carbon dioxide and organic matter by inorganic semiconductor photocatalysis system |
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Application publication date: 20110525 |