CN102580714A - Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof - Google Patents

Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof Download PDF

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Publication number
CN102580714A
CN102580714A CN2012100283961A CN201210028396A CN102580714A CN 102580714 A CN102580714 A CN 102580714A CN 2012100283961 A CN2012100283961 A CN 2012100283961A CN 201210028396 A CN201210028396 A CN 201210028396A CN 102580714 A CN102580714 A CN 102580714A
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graphene oxide
visible light
preparation
silver
light catalyst
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杨小飞
刘恒
张蓉仙
李扬
夏娴娴
唐华
宋浩杰
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Jiangsu University
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Jiangsu University
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Abstract

The invention provides a graphene oxide/silver phosphate composite visible light catalyst and a preparation method of the graphene oxide/silver phosphate composite visible light catalyst, belonging to the technical field of nano-composite material and photocatalysis. The preparation method comprises the following steps of: dissolving graphene oxide in water, and ultrasonically treating to obtain graphene oxide dispersing liquid; adding silver acetate into the graphene oxide dispersing liquid, and evenly stirring, to obtain mixed solution; slowly dropping prepared disodium hydrogen phosphate or sodium dihydrogen phosphate solution into the mixed solution of the graphene oxide and the silver acetate to continuously stir for a while; and repeatedly washing products obtained by reaction with deionized water and absolute ethyl alcohol, and carrying out vacuum drying to obtain the graphene oxide/silver phosphate nano-composite visible light catalyst. The invention has the advantages that the invention is wide in raw material source, and simple in preparation process, the obtained composite material is better in structure and feature, and the prepared nano-composite light catalyst is high-efficiency in degradation effect to the organic dyestuff rhodamine B and the methylene blue under the irradiation of visible light due to the structural advantage.

Description

A kind of graphene oxide/silver orthophosphate composite visible light catalyst and preparation method thereof
Technical field
The present invention relates to a kind of graphene oxide/silver orthophosphate composite visible light catalyst and preparation method thereof, belong to nano composite material and photocatalysis technology field.
Background technology
Along with increasing the weight of of excessive development and use of resource and environmental pollution; The more and more shortage of human available resources; Living environment receives more and more serious destruction; The environment and the energy be 21 century face of mankind with the significant problem that needs to be resolved hurrily, utilizing photocatalysis elimination and degradation of contaminant is one of current most active fields; Photocatalysis has broad application prospects and the great social and economical benefit in various fields such as environmental protection, clean energy resource (conversion of solar energy is a Hydrogen Energy), construction material, textile industries, receives the great attention of scientific circles, government department and business circles.
For a long time; Photochemical catalyst based on conductor oxidates such as titanium dioxide, zinc oxide becomes the focus that people pay close attention to and study; Though but because this type of photochemical catalyst has photocatalysis performance preferably under UV-irradiation, photocatalysis performance is very poor under radiation of visible light, though through doping, modification is compound etc., and technology can improve the visible light photocatalysis performance; But the raising degree of photocatalysis performance is limited; Therefore, the effective catalyst that development of new is visible light-responded becomes the focus direction that present photocatalysis is studied.
Contain the silver compound of p p-block element p owing to have the band structure of dispersion, can reduce the recombination rate of photo-generated carrier, thereby embody excellent photocatalysis activity.People such as Ye in 2010 ( Nature Mater., 2010,9, the silver orthophosphate of 559-564) at first finding specific morphology has very strong photooxidation under the visible light effect active, and water oxidation quantum yield is near 90%; And then 2011 they reported different-shape silver orthophosphate material preparation and photocatalysis performance ( J. Am. Chem. Soc.,2011,133,6490-6492), the silver orthophosphate material of different structure embodies excellent photocatalysis performance under visible light radiation, can be in the short time efficient degradation organic dyestuff rhodamine B and methylene blue; Patent of invention (CN101648139 B) has been reported a kind of novel visible catalyst-silver phosphate and preparation method thereof; Patent of invention (201110020586.4) has been reported a kind of electro-deposition silver orthophosphate photocatalytic semiconductor film and preparation method thereof; But literature survey finds that graphene oxide/silver orthophosphate nano compounded visible light Catalysts and its preparation method does not appear in the newspapers.
Summary of the invention
The purpose of this invention is to provide a kind of graphene oxide/silver orthophosphate nano compounded visible light Catalysts and its preparation method; The present invention solves problems such as existing photochemical catalyst is not high to the visible light utilization rate, slow and degradation rate is low to the organic dyestuff degradation speed, with graphene oxide and Graphene Ag 3PO 4Be used for the visible light photocatalysis field, the preparation method is simple, do not need cost and complex equipment, synthesis condition is gentle.
The technical scheme that the present invention adopted; Be to be raw material with graphene oxide, silver acetate; Mix through mechanical agitation earlier, make graphene oxide/silver orthophosphate nano compounded visible light photocatalyst through reaction then with sodium hydrogen phosphate or sodium dihydrogen phosphate.
Concrete steps are:
(1) graphene oxide dispersion liquid preparation: get graphene oxide and be dissolved in deionized water for ultrasonic dispersion 3-5 hour, obtaining concentration is the graphene oxide dispersion liquid of 0.01-1 wt%;
(2) silver acetate is joined in the above-mentioned graphene oxide dispersion liquid, magnetic agitation obtains mixing precursor solution A, and wherein the concentration of silver acetate is 0.2-5wt%;
(3) the sodium hydrogen phosphate solid is dissolved in the deionized water, obtaining concentration is the disodium phosphate soln B of 0.2-2.0 mol/L;
(4) the sodium dihydrogen phosphate solid is dissolved in the deionized water, obtaining concentration is the disodium phosphate soln C of 0.2-2.0 mol/L;
(5) under the magnetic agitation condition, the disodium phosphate soln B of step (3) preparation or the disodium phosphate soln C of step (4) preparation are dropwise slowly added the mixing precursor solution A that step (2) prepares; In reaction system, occur yellow muddy; Dropwising the back mixed solution at room temperature stirred 0.5-2 hour; The product centrifugation back that obtains is washed vacuum drying respectively with deionized water and absolute ethyl alcohol.
The present invention first with graphene oxide/silver orthophosphate nanocomposite applications in photocatalysis field; Graphene oxide is as a kind of novel two-dimensional nano material with carbon element; Have very big specific area, both can be used as a kind of good carrier, also can better be adsorbed with organic dye and organic pollution; Current paper research shows: silver orthophosphate embodies photocatalysis performance preferably under radiation of visible light; Graphene and silver orthophosphate effectively compound not only can effectively be regulated and control the pattern and the crystal face of silver orthophosphate nano particle, and reducing reunites improves its dispersiveness; And can improve utilization rate to a greater extent to visible light; Enhancing is to the adsorption capacity of organic dyestuff, and when illumination was penetrated, silver orthophosphate can decompose a large amount of organic dyestuff of oxidized Graphene absorption fast; Graphene oxide recovers original adsorption capacity again and continues to be adsorbed with organic dye after having decomposed; The effect repeatedly that continues of whole process makes graphene oxide/silver orthophosphate nano-composite catalyst of preparing under radiation of visible light, has higher catalytic activity, and organic dyestuff is had degradation capability efficiently.Preparation method of the present invention is simple, helps large-scale popularization.
Description of drawings
Fig. 1 is the scanning electron microscope diagram of graphene oxide/silver orthophosphate nano compounded visible light catalyst;
Fig. 2 is the X-ray diffractogram of graphene oxide/silver orthophosphate nano compounded visible light catalyst;
Fig. 3 be graphene oxide/silver orthophosphate nano compounded visible light catalyst under different visible light under the light application time to the photocatalytic degradation curve map of rhodamine B and methylene blue;
1 is rhodamine B; 2 is methylene blue.
The specific embodiment
To combine specific embodiment further to illustrate content of the present invention below, but these embodiment do not limit protection scope of the present invention.
Embodiment 1
Get 5 mg graphene oxides and disperseed 3 hours, 0.2 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 1.42 g sodium hydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the disodium phosphate soln that concentration is 0.2 mol/L; Graphene oxide/silver acetate the solution that under the magnetic agitation condition, disodium phosphate soln is dropwise added preparation occurs yellow muddy in reaction system; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 2
Get 20 mg graphene oxides and disperseed 3 hours, 0.4 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 2.84 g sodium hydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the disodium phosphate soln that concentration is 0.4 mol/L; Graphene oxide/silver acetate the solution that under the magnetic agitation condition, disodium phosphate soln is dropwise added preparation occurs yellow muddy in reaction system; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 3
Get 50 mg graphene oxides and disperseed 4 hours, 0.6 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 7.1 g sodium hydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the disodium phosphate soln that concentration is 1 mol/L; Graphene oxide/silver acetate the solution that under the magnetic agitation condition, disodium phosphate soln is dropwise added preparation occurs yellow muddy in reaction system; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
The scanning electron microscope diagram of graphene oxide/silver orthophosphate nano compounded visible light catalyst that Fig. 1 goes out for this embodiment is prepared; We can know and find out that resulting silver orthophosphate is wrapped up by very thin one deck graphene oxide from figure, and particle size distribution is between 0.4-1 mm; The X-ray diffracting spectrum of graphene oxide/silver orthophosphate nano compounded visible light catalyst that Fig. 2 goes out for this embodiment is prepared; Diffraction maximums all among the figure are all coincide with the cubic system silver orthophosphate; The diffraction peak intensity of the graphene oxide about 10 ° a little less than because almost can't observe in the drawings.
Embodiment 4
Get 100 mg graphene oxides and disperseed 5 hours, 0.8 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 10.7 g sodium hydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the disodium phosphate soln that concentration is 1.5 mol/L; Disodium phosphate soln with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 5
Get 200 mg graphene oxides and disperseed 5 hours, 1 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 14.2 g sodium hydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the disodium phosphate soln that concentration is 2 mol/L; Disodium phosphate soln with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 6
Get 5 mg graphene oxides and disperseed 3 hours, 0.2 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 1.2 g sodium dihydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the sodium dihydrogen phosphate that concentration is 0.2 mol/L; Sodium dihydrogen phosphate with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 7
Get 20 mg graphene oxides and disperseed 3 hours, 0.4 g silver acetate is added above solution in 20 mL deionized water for ultrasonic; 2.4 g sodium dihydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the sodium dihydrogen phosphate that concentration is 0.4 mol/L; Sodium dihydrogen phosphate with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 8
Get 50 mg graphene oxides and disperseed 4 hours, 0.6 g silver acetate is added above solution in 30 mL deionized water for ultrasonic; 6 g sodium dihydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the sodium dihydrogen phosphate that concentration is 1 mol/L; Sodium dihydrogen phosphate with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 9
Get 100 mg graphene oxides and disperseed 5 hours, 0.8 g silver acetate is added above solution in 40 mL deionized water for ultrasonic; 9 g sodium dihydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the sodium dihydrogen phosphate that concentration is 1.5 mol/L; Sodium dihydrogen phosphate with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Embodiment 10
Get 200 mg graphene oxides and disperseed 5 hours, 1 g silver acetate is added above solution in 50 mL deionized water for ultrasonic; 12 g sodium dihydrogen phosphates are dissolved in the 50 mL deionized waters, obtain the sodium dihydrogen phosphate that concentration is 2 mol/L; Sodium dihydrogen phosphate with preparation under the magnetic agitation condition dropwise adds the graphene oxide/silver acetate solution of preparation, in reaction system, occurs yellow muddy; At room temperature continue after dropwising to stir 15 minutes, suction filtration, with sediment repeatedly with washed with de-ionized water, vacuum drying.
Prepared graphene oxide/silver orthophosphate the nano compounded visible light photocatalyst that goes out of the present invention is used to the photocatalytic degradation experiment of organic dyestuff rhodamine B and methylene blue, and detailed process and step are following:
The nano composite photo-catalyst of 100 mg was scattered in the rhodamine B and methylene blue solution of 100 mL (concentration is 1 mg/mL) back respectively ultrasonic 10 minutes; The dispersion liquid that mixes is transferred in the quartzy bottle in the xenon lamp catalytic reactor; Continue to open light source after stirring made it reach adsorption equilibrium in 30 minutes; Whenever extracting the postradiation mixed dispersion liquid of 4 mL at a distance from 1 minute with syringe transfers in the centrifuge tube of mark; Light-catalyzed reaction a period of time to the mixed solution that takes out is colourless; Sample in all centrifuge tubes is centrifugalized; The resulting supernatant liquor in centrifugal back is further transferred to the absorbance under the mensuration different photocatalysis time on the ultraviolet-visible spectrophotometer in the quartz colorimetric utensil, thereby obtains graphene oxide under each time period/silver orthophosphate nano composite photo-catalyst photocatalytic degradation curve to rhodamine B and methylene blue under radiation of visible light.
Graphene oxide/silver orthophosphate nano composite photo-catalyst that Fig. 3 goes out for embodiment 3 is prepared under the visible light condition to the photocatalytic degradation curve map of rhodamine B and methylene blue; As can be seen from Figure 3; This nano composite photo-catalyst radiation of visible light after 8 minutes the degradation rate to rhodamine B be 100 %, the degradation rate of methylene blue is also surpassed 90%.

Claims (3)

1. graphene oxide/silver orthophosphate composite visible light catalyst, it is characterized in that: said composite visible light catalyst is made up of graphene oxide and silver orthophosphate, and the oxidized Graphene of silver orthophosphate particle wraps up, and particle size distribution is between 0.4-1 mm; Said composite visible light catalyst all has good photocatalytic degradation effect to organic dyestuff rhodamine B and methylene blue under excited by visible light, the degradation rate of 8 minutes rhodamine Bs is 100%, and the degradation rate of methylene blue surpasses 90%.
2. the preparation method of a kind of graphene oxide as claimed in claim 1/silver orthophosphate composite visible light catalyst is characterized in that: adopt the following steps preparation:
(1) graphene oxide dispersion liquid preparation: get graphene oxide and be dissolved in deionized water for ultrasonic and disperse to obtain the graphene oxide dispersion liquid that concentration is 0.01-1 wt%;
(2) silver acetate is joined in the above-mentioned graphene oxide dispersion liquid, magnetic agitation obtains mixing precursor solution A, and wherein the concentration of silver acetate is 0.2-5wt%;
(3) the sodium hydrogen phosphate solid is dissolved in the deionized water, obtaining concentration is the disodium phosphate soln B of 0.2-2.0 mol/L;
(4) the sodium dihydrogen phosphate solid is dissolved in the deionized water, obtaining concentration is the disodium phosphate soln C of 0.2-2.0 mol/L;
(5) under the magnetic agitation condition, the disodium phosphate soln B of step (3) preparation or the disodium phosphate soln C of step (4) preparation are dropwise added the mixing precursor solution A that step (2) prepares; In reaction system, occur yellow muddy; Dropwise the back mixed solution and at room temperature stirred 0.5-2 hour, with the product that obtains centrifugation back with deionized water and absolute ethyl alcohol wash respectively, vacuum drying.
3. the preparation method of a kind of graphene oxide as claimed in claim 2/silver orthophosphate composite visible light catalyst is characterized in that: ultrasonic dispersion is 3-5 hour in the step (1).
CN2012100283961A 2012-02-09 2012-02-09 Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof Pending CN102580714A (en)

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Cited By (16)

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CN102872889A (en) * 2012-10-10 2013-01-16 江苏大学 Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same
CN102921438A (en) * 2012-11-06 2013-02-13 武汉理工大学 Preparation for silver phosphate nano ball-graphene composite material and photocatalysis application
CN103599802A (en) * 2013-11-05 2014-02-26 浙江理工大学 Preparation method of silver phosphate/graphene nanocomposite
CN104258857A (en) * 2014-09-22 2015-01-07 武汉理工大学 Silver chromate-graphene oxide composite photocatalytic material and preparation method thereof
CN105396619A (en) * 2015-12-11 2016-03-16 华南理工大学 MIL-100(Fe) silver phosphate composite photocatalyst, preparation and applications
CN105521805A (en) * 2016-01-18 2016-04-27 西北大学 Preparing method and applications of nano composite material GO-MgWO4
CN105944741A (en) * 2016-05-19 2016-09-21 南京理工大学 GO/Ag3PO4/AgBr ternary composite photocatalyst and preparation method thereof
CN106890657A (en) * 2017-01-06 2017-06-27 华南理工大学 A kind of graphene oxide/silver phosphate/composite photo-catalyst and preparation and application
CN109248696A (en) * 2018-10-25 2019-01-22 天津工业大学 Fullerene compound phosphoric acid ag material and synthetic method
CN109908929A (en) * 2019-03-06 2019-06-21 吉林化工学院 A kind of dual purpose catalyst and its preparation method and application of concerted catalysis visible light/class Fenton advanced oxidation reaction
CN109999867A (en) * 2019-04-28 2019-07-12 浙江理工大学 A kind of flexible carbon fibre cloth@BiOCl@Ag3PO4Optic catalytic composite material and preparation method thereof
CN110201723A (en) * 2019-07-09 2019-09-06 西南石油大学 A kind of dopamine/redox graphene/silver orthophosphate composite photocatalyst material and its preparation
CN110227511A (en) * 2019-07-10 2019-09-13 成都理工大学 A kind of preparation method of low temperature liquid phase precipitation method silver orthophosphate/graphene oxide visible-light photocatalyst
CN110252414A (en) * 2019-07-09 2019-09-20 西南石油大学 A kind of preparation and application of poly-dopamine/redox graphene/silver orthophosphate PVDF photocatalysis membrana
CN112430415A (en) * 2020-11-18 2021-03-02 浙江昌格家居有限公司 Environment-friendly water-based paint and preparation method thereof
CN113304767A (en) * 2021-05-12 2021-08-27 安徽工程大学 Magnetic nitrogen-doped reduced graphene/phosphate visible-light-driven photocatalyst and preparation method and application thereof

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102872889A (en) * 2012-10-10 2013-01-16 江苏大学 Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same
CN102872889B (en) * 2012-10-10 2014-08-20 江苏大学 Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same
CN102921438A (en) * 2012-11-06 2013-02-13 武汉理工大学 Preparation for silver phosphate nano ball-graphene composite material and photocatalysis application
CN103599802A (en) * 2013-11-05 2014-02-26 浙江理工大学 Preparation method of silver phosphate/graphene nanocomposite
CN104258857A (en) * 2014-09-22 2015-01-07 武汉理工大学 Silver chromate-graphene oxide composite photocatalytic material and preparation method thereof
CN105396619A (en) * 2015-12-11 2016-03-16 华南理工大学 MIL-100(Fe) silver phosphate composite photocatalyst, preparation and applications
CN105521805A (en) * 2016-01-18 2016-04-27 西北大学 Preparing method and applications of nano composite material GO-MgWO4
CN105944741A (en) * 2016-05-19 2016-09-21 南京理工大学 GO/Ag3PO4/AgBr ternary composite photocatalyst and preparation method thereof
CN106890657A (en) * 2017-01-06 2017-06-27 华南理工大学 A kind of graphene oxide/silver phosphate/composite photo-catalyst and preparation and application
CN109248696A (en) * 2018-10-25 2019-01-22 天津工业大学 Fullerene compound phosphoric acid ag material and synthetic method
CN109908929A (en) * 2019-03-06 2019-06-21 吉林化工学院 A kind of dual purpose catalyst and its preparation method and application of concerted catalysis visible light/class Fenton advanced oxidation reaction
CN109999867A (en) * 2019-04-28 2019-07-12 浙江理工大学 A kind of flexible carbon fibre cloth@BiOCl@Ag3PO4Optic catalytic composite material and preparation method thereof
CN110201723A (en) * 2019-07-09 2019-09-06 西南石油大学 A kind of dopamine/redox graphene/silver orthophosphate composite photocatalyst material and its preparation
CN110252414A (en) * 2019-07-09 2019-09-20 西南石油大学 A kind of preparation and application of poly-dopamine/redox graphene/silver orthophosphate PVDF photocatalysis membrana
CN110227511A (en) * 2019-07-10 2019-09-13 成都理工大学 A kind of preparation method of low temperature liquid phase precipitation method silver orthophosphate/graphene oxide visible-light photocatalyst
CN112430415A (en) * 2020-11-18 2021-03-02 浙江昌格家居有限公司 Environment-friendly water-based paint and preparation method thereof
CN113304767A (en) * 2021-05-12 2021-08-27 安徽工程大学 Magnetic nitrogen-doped reduced graphene/phosphate visible-light-driven photocatalyst and preparation method and application thereof

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Application publication date: 20120718