CN106607063A - Floating visible-light-induced photocatalyst, and preparation method and application thereof - Google Patents
Floating visible-light-induced photocatalyst, and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a floating visible-light-induced photocatalyst capable of degrading organic pollutants in a water body. The floating visible-light-induced photocatalyst uses fly ash floating beads as a carrier, wherein the surfaces of the fly ash floating beads are coated with a BiOBr or/and BiOI material, and a coverage rate is 50 to 100%; and the fly ash floating beads are hollow spherical particles with diameters in a range of 20 to 200 [mu]m and specific gravity of 0.3 to 0.5 g/cm<3>. A preparation method for the floating visible-light-induced photocatalyst loads BiOBr or/and BiOI onto the surfaces of the fly ash floating beads through two steps, i.e., neutralization-hydrolysis and low-temperature insulation treatment, so energy consumption of high-temperature treatment and damage of high-temperature treatment to the structures of the floating beads are avoided, operation time is short and controllable, and implementation and industrial utilization of the preparation method are more easier. The prepared visible-light-induced photocatalyst has low cost, can be repeatedly used, is floatable on the surface of a water body, enables the removal rate of rhodamine B to reach 100% within 40 min, and has good application prospects in treatment of pollutions of surface water bodies, especially in treatment of water bodies with organic pollutants floating on the surface of the water bodies.
Description
Technical field
The present invention relates to a kind of visible-light photocatalyst, specifically a kind of float type visible-light photocatalyst and preparation method and application, more particularly to a kind of float type visible-light photocatalyst and preparation method and application to Organic Pollutants In Water degraded.
Background technology
With the development of social economy; energy crisis and environmental problem are current world questions of common concern; and conductor photocatalysis show strong oxidizing property, pollutant mineralising completely, low cost, efficiently, the advantages of do not produce secondary pollution; being capable of thorough mineralising organic pollution materials; and can directly with sunlight as the energy the characteristics of; it is expected to while solve the energy and environmental problem, so obtaining the concern of people always.At present, the photocatalyst for paying close attention at most is TiO2, be mainly its have nontoxic, physico-chemical property it is stable, it is cheap and easy to get the characteristics of.But, due to TiO2Energy gap is wider（For 3.2eV）, by ultraviolet excitation, can only can only utilize the energy of about 4 ﹪ in sunlight；And in solar spectrum, account for the overwhelming majority（About 96 ﹪）Visible light part can not then be effectively utilised, thus limit its actual commercial Application.Therefore, how efficiently light-catalyzed reaction is carried out using sunlight, people have been transferred to sight that can develop can be by the exploitation of the photocatalyst of excited by visible light.
Floating bead is a kind of fly ash hollow ball that can be bubbled through the water column, and is the general industry solid waste of coal-burning power plant, a kind of ceramic microsphere being mainly made up of aluminosilicate, and in canescence, wall is thin hollow, very light in weight, and unit weight is 720kg/m3（Heavy）, 418.8kg/m3（Lightweight）, about 0.1 millimeter of particle diameter, surface-closed and it is smooth, thermal conductivity is little, refractoriness >=1610 DEG C, is excellent heat insulating refractory material, in terms of being widely used in production and the oil drilling of lightening casting material.The chemical analysis of floating bead based on silicon dioxide and aluminium sesquioxide, with multifrequency natures such as granule is thin, hollow, light weight, high intensity, wear-resisting, high temperature resistant, insulation insulation, flame-resistant insulations.Due to nontoxic, cheap, physico-chemical property is stable, low heat conductivity and the characteristics of hollow structure, can be used as the carrier of photocatalyst.Particularly it is capable of the surface for swimming in surface water body of long-time stable after loaded optic catalyst, can both be that the visible-light photocatalyst for loading fully receives sunlight irradiation to improve the utilization rate of solar energy, convenient recovery after pollution of water thing oxidation Decomposition is reused again, and pollution of water rehabilitation cost can be greatly lowered.Additionally, the good absorption property of floating bead can also improve the degradation efficiency of photocatalyst.With traditional TiO2
Photocatalyst is compared, and advantage is self-evident.
Bismuth series photocatalyst causes the great interest of researchers with its unique electronic structure, excellent visible absorption ability and higher organic matter degradation ability.Such as pucherite（Chemical formula BiVO4）Because of its narrower band gap（2.4eV left and right）, higher photochemical stability, stronger redox ability and nontoxic, low cost and other advantages and be more and more applied to visible light photocatalysis research.BiOX BiOX (X=Cl, Br, I) is with along c direction of principal axis, double X sheaths and Bi2O2Layer is alternately arranged the layered crystal structure of composition, is the important layer structure quasiconductor of a class.It is this to be conducive to efficiently separating and electric charge transfer for photo-generate electron-hole pair with open and indirect transition layered crystal structure, can be directly by excited by visible light as visible-light photocatalyst.
Document 1：Application number：03158740.2, the applying date：2003-09-22, denomination of invention：Patent with visible light-responded photocatalyst and its preparation method and application discloses a kind of metal oxide particle, nonmetalloid, the catalyst of semi-conductor nano particles composition, and the metal-oxide is the materials such as ferrum oxide, rubidium oxide, nickel oxide, cobalt oxide, Aska-Rid., copper oxide, silver oxide, Indium sesquioxide., bismuth oxide.Nonmetalloid is nitrogen, carbon, sulfur, boron, phosphorus etc..Semi-conductor nano particles are titanium dioxide (TiO2), tin ash (SnO2), Zinc Oxide (ZnO), cadmium sulfide (CdS), Tungstic anhydride. (WO3) etc. the material with photocatalytic activity.The catalyst can be additionally used in photocatalytic synthesis into light-catalyzed reactions such as, photocatalysis fixed nitrogen in addition to it can be used for the photocatalysis treatment of air, waste water, surface water and Organic Pollutants of Drinking Water, heavy metal ion etc..
Document 2：Application number：201410730696.3, the applying date：2014-12-05, denomination of invention：A kind of patent of the preparation method of BiOX/bismuth oxide visible-light photocatalyst discloses and bismuth nitrate is dissolved in salpeter solution, adjusts pH with alkali liquor, and stirring is filtered, and washing is dried, 300-600 DEG C of calcining 3-10 hour of high temperature, and oxide yellow bismuth is obtained；Obtained bismuth oxide adds appropriate certain density hydrochloric acid, hydrobromic acid or hydroiodic acid, centrifugation after ultrasonic reaction, is dried 4-10 hours afterwards and is BiOX/bismuth oxide photocatalyst at 50-100 DEG C of constant temperature.The BiOX of preparation/bismuth oxide visible-light photocatalyst effectively solves the problems, such as that light induced electron and Carrier recombination rate are high, greatly improves photocatalysis performance.
Photocatalyst described in document 1, document 2 can not be floated, and such as water body process, will sink to water body, surface sunlight irradiation can not effectively be received, be unfavorable for that the photocatalysis of water surface pollutant are removed, while, there is also recovery difficult, easily cause the waste of resource；And preparation process is loaded down with trivial details, need first to prepare bismuth oxide through calcining, then by the ion exchange process under acid condition.
For this purpose, document 3：Application number：201210301463.2, the applying date：2012-08-23, denomination of invention：A kind of float type BiVO4The patent of/floating bead composite photo-catalyst, its preparation method and application is disclosed with floating bead as carrier, in floating bead area load BiVO4Particle film.Its preparation process is：Under room temperature, the acetylacetone,2,4-pentanedione solution of isopropoxy vanadium oxide is mixed with the glacial acetic acid solution of bismuth nitrate, is stirred vigorously, form cyan colloidal sol, be subsequently adding fly ash float stirring and loaded, impregnate, water bath method, calcining obtains the composite photo-catalyst.The results showed, the photocatalyst has absorption in 200-550nm wave-length coverages, is a kind of visible-light-responsive photocatalyst, with conventional TiO2Photocatalyst is compared, BiVO4/ floating bead can improve the utilization rate to solar energy；Additionally, compared to TiO2/ floating bead, BiVO4/ floating bead can significantly improve the efficiency of degradation of methylene blue under visible light.
But, document 3 during using floating bead loaded optic catalyst, using the method for high-temperature calcination, the method needs higher energy consumption during calcining, there is higher requirement to equipment, also, the structure breaking of floating bead is easily caused in high temperature and flotation property is lost.
The content of the invention
It is an object of the invention to provide a kind of float type visible-light photocatalyst and preparation method and application to Organic Pollutants In Water degraded.
BiOX BiOX (X=Cl, Br, I) is with along c direction of principal axis, double X sheaths and Bi2O2Layer is alternately arranged the layered crystal structure of composition, is the important layer structure quasiconductor of a class.It is this to be conducive to efficiently separating and electric charge transfer for photo-generate electron-hole pair with open and indirect transition layered crystal structure, can be directly by excited by visible light as visible-light photocatalyst, wherein BiOBr and BiOI energy gaps are narrower can be directly by excited by visible light as visible-light photocatalyst, both have more excellent photocatalytic activity by composition compound system, but BiOBr and BiOI and its compound powder are easily sunk to below water body in actual applications, on the one hand it is not easy to receive solar irradiation, on the other hand reclaims and be difficult.
The present invention adopts the following technical scheme that and realizes its goal of the invention, a kind of float type visible-light photocatalyst, and with fly ash float as carrier, fly ash float surface is coated with BiOBr or/and BiOI materials to the photocatalyst, and coverage rate is 50 ﹪～100 ﹪；The fly ash float is hollow spheroidal particle, and a diameter of 20 μm～200 μm, proportion is 0.3g/cm3～0.5g/cm3。
A kind of float type visible-light photocatalyst preparation method, it comprises the following steps：
(1) floating bead pretreatment, fly ash float is added in distilled water, cleans 1h～2h, filter, 101 DEG C of dryings under room temperature；
(2) by Bi (NO3)3•5H2O is dissolved in ethylene glycol, Bi (NO3)3•5H2O is 1 with the mass ratio of ethylene glycol:5～40, after solid all dissolves, KBr or/and KI is added, is sufficiently stirred for being dissolved into transparent mixed solution；KBr and Bi (NO in solution3)3•5H2The mol ratio of O is 0～1:1, KI and Bi (NO3)3•5H2The mol ratio of O is 0～1:1, KBr and KI total mole number and Bi (NO3)3•5H2The mol ratio of O is 1:1；
(3) toward step mixed solution (2), add step (1) to prepare fly ash float, is sufficiently stirred for 20min～60min, Bi (NO3)3•5H2O is 0.5～1 with the mass ratio of floating bead:1, continue under stirring in room temperature, then 35.0 wt ﹪ NH are slowly added to in mixed solution3•H2O, the pH value for adjusting system are 5.0～12.0, that is, milky suspension is obtained；
(4) the milky suspension vacuum filter for (3) step being prepared, 0.5h～12h is incubated at 100 DEG C in an oven～200 DEG C of the filter cake for obtaining, then, the powder sample for obtaining is washed with deionized, finally, in drying baker, 90 DEG C are dried 1h～6h, that is, the visible-light photocatalyst that fly ash float loads BiOBr or/and BiOI is obtained.
The present invention step (2) in, Bi (NO3)3•5H2O is more preferably 1 with the mass ratio of ethylene glycol:15～30.
The present invention step (2) in, Bi (NO3)3•5H2O is preferably 1 with the mass ratio of ethylene glycol:20～25.
The present invention step (3) in, NH3•H2The pH value of O adjustment systems is preferably 8.0～10.0.
The above-mentioned float type visible-light photocatalyst of the present invention, under visible light illumination, to the application in Organic Pollutants In Water degradation process.
The above-mentioned float type visible-light photocatalyst of the present invention, under visible light illumination, to the application in Organic Pollutants In Water rose red b degradation process.
Due to adopting above-mentioned technical proposal, the present invention preferably realizes goal of the invention, processes two-step method by neutralizing hydrolysis and low-temperature insulation, BiOBr or/and BiOI are loaded to the surface of fly ash float, avoid the energy consumption of high-temperature process and to floating bead structural damage, while can be with reducing energy consumption；Meanwhile, neutralizing hydrolysis and low-temperature insulation process two steps and are suitable for carrying out in big device, and the operating time is short and controllable, it is easier to implement and industrialized utilization；BiOBr the or/and BiOI visible-light photocatalysts of preparation are with low cost, reusable, may float on water surface, and 40min can make the clearance of rose red b reach 100 ﹪, and photocatalysis efficiency is far above P25 TiO2Powder body, and activity is not decreased obviously after reusing, administering in pollution of water has larger application prospect especially for the water body treating for having surface flotation organic pollutant.
Description of the drawings
Fig. 1 is that fly ash float surface prepared by the present invention is coated with BiOBr or/and BiOI visible-light photocatalyst XRD spectrums；
Fig. 2 is the design sketch that fly ash float surface prepared by the present invention is coated with BiOBr or/and BiOI visible-light photocatalysts degraded rose red b；
Fig. 3 is that fly ash float surface prepared by the present invention is coated with BiOBr or/and BiOI visible-light photocatalyst scanning electron microscopies（SEM）Figure；
Fig. 4 is the UV-vis DRS spectrum that the fly ash float surface that the present invention is prepared at various ph values is coated with BiOBr or/and BiOI visible-light photocatalysts（DRS）Collection of illustrative plates.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1：
A kind of float type visible-light photocatalyst preparation method, it comprises the following steps：
(1) floating bead pretreatment, fly ash float is added in distilled water, cleans 1h～2h, filter, 101 DEG C of dryings under room temperature；
(2) by Bi (NO3)3•5H2O is dissolved in ethylene glycol, Bi (NO3)3•5H2O is 1 with the mass ratio of ethylene glycol:5～40, after solid all dissolves, KBr or/and KI is added, is sufficiently stirred for being dissolved into transparent mixed solution；KBr and Bi (NO in solution3)3•5H2The mol ratio of O is 0～1:1, KI and Bi (NO3)3•5H2The mol ratio of O is 0～1:1, KBr and KI total mole number and Bi (NO3)3•5H2The mol ratio of O is 1:1；
The present invention step (2) in, Bi (NO3)3•5H2O is more preferably 1 with the mass ratio of ethylene glycol:15～30.
The present invention step (2) in, Bi (NO3)3•5H2O is preferably 1 with the mass ratio of ethylene glycol:20～25.
(3) toward step mixed solution (2), add step (1) to prepare fly ash float, is sufficiently stirred for 20min～60min, Bi (NO3)3•5H2O is 0.5～1 with the mass ratio of floating bead:1, continue under stirring in room temperature, then 35.0 wt ﹪ NH are slowly added to in mixed solution3•H2O, the pH value for adjusting system are 5.0～12.0, that is, milky suspension is obtained；
The present invention step (3) in, NH3•H2The pH value of O adjustment systems is preferably 8.0～10.0.
(4) the milky suspension vacuum filter for (3) step being prepared, 0.5h～12h is incubated at 100 DEG C in an oven～200 DEG C of the filter cake for obtaining, then, the powder sample for obtaining is washed with deionized, finally, in drying baker, 90 DEG C are dried 1h～6h, that is, the visible-light photocatalyst that fly ash float loads BiOBr or/and BiOI is obtained.
A kind of float type visible-light photocatalyst, with fly ash float as carrier, fly ash float surface is coated with BiOBr or/and BiOI materials to the photocatalyst, and coverage rate is 50 ﹪～100 ﹪；The fly ash float is hollow spheroidal particle, and a diameter of 20 μm～200 μm, proportion is 0.3g/cm3～0.5g/cm3。
The above-mentioned float type visible-light photocatalyst of the present invention, under visible light illumination, to the application in Organic Pollutants In Water degradation process.
The above-mentioned float type visible-light photocatalyst of the present invention, under visible light illumination, to the application in Organic Pollutants In Water rose red b degradation process.
The present embodiment is by fly ash float（A diameter of 20 μm～200 μm, proportion is 0.3g/cm3～0.5g/cm3）In adding distilled water, 1～2h is cleaned under room temperature, is filtered, 101 DEG C of dryings；Weigh the Bi (NO of 2.8 mmol3)3•5H2O is dissolved in 20mL ethylene glycol, after solid all dissolves, then plus 2.8 mmol
KBr so that KBr and Bi (NO3)3•5H2O mol ratios are 1:1, it is sufficiently stirred for being dissolved into transparent mixed solution；The fly ash float after 2.0g drying is added in above-mentioned mixed solution, is sufficiently stirred for 60min, then is continued, under stirring, 35.0 wt ﹪ NH to be slowly added to above-mentioned mixing liquid in room temperature3•H2The pH value of O adjustment systems is 9, you can obtain the mixture of white；The suspension vacuum filter of the emulsus that above-mentioned steps are obtained, the filter cake for obtaining is incubated 6h at 160 DEG C in an oven, then the powder sample of the Lycoperdon polymorphum Vitt for obtaining is washed with deionized for several times, finally in drying baker 90 DEG C be dried 1h obtain fly ash float load BiOBr visible-light photocatalyst.
Embodiment 2：
The present embodiment is by fly ash float（A diameter of 20 μm～200 μm, proportion is 0.3g/cm3～0.5g/cm3）In adding distilled water, 1～2h is cleaned under room temperature, is filtered, 101 DEG C of dryings；Weigh the Bi (NO of 2.8 mmo3)3•5H2O is dissolved in 20mL ethylene glycol, after solid all dissolves, then plus 2.8 mmol
KI so that KI and Bi (NO3)3•5H2O mol ratios are 1:1, it is sufficiently stirred for being dissolved into transparent mixed solution；The fly ash float after 2.0g drying is added in above-mentioned mixed solution, is sufficiently stirred for 60min, then is continued, under stirring, 35.0 wt ﹪ NH to be slowly added to above-mentioned mixing liquid in room temperature3•H2The pH value of O adjustment systems is 9, you can obtain the mixture of white；The suspension vacuum filter of the emulsus that above-mentioned steps are obtained, the filter cake for obtaining is incubated 6h at 160 DEG C in an oven, then the powder sample of the yellowish-brown for obtaining is washed with deionized for several times, finally in drying baker 90 DEG C be dried 1h obtain fly ash float load BiOI visible-light photocatalyst.
Embodiment 3：
The present embodiment is by fly ash float（A diameter of 20 μm～200 μm, proportion is 0.3g/cm3～0.5g/cm3）In adding distilled water, 1～2h is cleaned under room temperature, is filtered, 101 DEG C of dryings；Weigh the Bi (NO of 2.8 mmo3)3•5H2O is dissolved in 20mL ethylene glycol, after solid all dissolves, adds 1.4 mmol
KBr and 1.4 mmol
KI so that KBr and Bi (NO3)3•5H2O mol ratios are 0.5:1, while KI and Bi (NO3)3•5H2O mol ratios are 0.5:1, NaBr and KI total mole number and Bi (NO3)3•5H2O mol ratios are 1:1, it is sufficiently stirred for being dissolved into transparent mixed solution；The hollow microsphere carrier after 2.0g drying is added in above-mentioned mixed solution, 60min is sufficiently stirred for.Continue, under stirring, to be slowly added to 35.0 wt ﹪ NH to above-mentioned mixing liquid in room temperature again3•H2The pH value of O adjustment systems is 9, you can obtain the mixture of white；The suspension vacuum filter of the emulsus that above-mentioned steps are obtained, the filter cake for obtaining is incubated 6h at 160 DEG C in an oven, then the yellowish green powder sample for obtaining is washed with deionized for several times, finally in drying baker, 90 DEG C of 1 h of drying obtain the visible-light photocatalyst that fly ash float loads BiOBr and BiOI.
As shown in Figure 1, the fly ash float that embodiment 1, embodiment 2 and embodiment 3 are prepared loads BiOBr, load BiOI, the visible-light photocatalyst of load BiOBr and BiOI and can preferably float on water surface, Jing X-ray diffractions（XRD）Material phase analysis, can learn that the fly ash float surface of embodiment 1, embodiment 2 and embodiment 3 has loaded BiOBr, BiOI, BiOBr and BiOI of Tetragonal respectively.
Using 50 W LED blue-ray lights as light source, the dominant wavelength of the light source is that 450nm is visible ray, light source distance reaction tank liquid level 5cm, using rose red b as target substance in activity experiment for visible light photocatalysis active evaluation.All of photocatalysis experiment is reacted initial condition and is：50 mL rose red b solution, add the 100 mg fly ash float load BiOBr for preparing, the visible-light photocatalyst for loading BiOI, loading BiOBr and BiOI, before illumination reaction, suspension system is placed in into dark place magnetic agitation 30min, it is ensured that organic molecule reaches absorption and desorption equilibrium on catalysis material surface.Then open light source, after the suspension that certain time interval takes 2 mL is filtered and removes solid, by the liquid being filtrated to get visible ultraviolet spectrophotometer (UV-1800, Shimadzu, Japan) on determine its concentration, while calculate rose red b degradation efficiency.Fig. 2 is that the fly ash float that embodiment 1, embodiment 2 and embodiment 3 are prepared loads BiOBr, load BiOI, the photocatalytic activity evaluation comparison diagram of the visible-light photocatalyst of load BiOBr and BiOI, as shown in Figure 2, the visible-light photocatalyst of fly ash float load BiOBr and BiOI has highest visible light photocatalysis active, visible ray reaches 100 ﹪ according to the rose red b clearance after 40min, is much better than P25 TiO2Suspension system.
As shown in Figure 3, the visible-light photocatalyst of fly ash float that embodiment 3 the is prepared load BiOBr and BiOI irregular BiOBr and BiOI membranaceous materials in circular fly ash float area load, the rough surface of formation are conducive to Organic substance in the absorption on surface.
Embodiment 4：
The present embodiment step (3) in, adjust system pH value be 5.
Remaining same embodiment 3.
Embodiment 5：
The present embodiment step (3) in, adjust system pH value be 7.
Remaining same embodiment 3.
Embodiment 6：
The present embodiment step (3) in, adjust system pH value be 11.
Remaining same embodiment 3.
As shown in Figure 4, the visible-light photocatalyst sample of the fly ash float load BiOBr and BiOI that embodiment 4, embodiment 5 and embodiment 6 are prepared has good absorption in 200 nm of wavelength～550nm, it is visible-light photocatalyst to illustrate that fly ash float loads the visible-light photocatalyst of BiOBr and BiOI, with in preparation process, the pH value of adjustment system is higher, and the ability that photocatalyst absorbs visible ray is stronger.
Embodiment 7：
The present embodiment step (2) in, weigh the Bi (NO of 2.8 mmol3)3•5H2O is dissolved in 10mL ethylene glycol.
Remaining same embodiment 3.
Embodiment 8：
The present embodiment step (2) in, weigh the Bi (NO of 2.8 mmol3)3•5H2O is dissolved in 30mL ethylene glycol.
Remaining same embodiment 3.
Embodiment 9：
The present embodiment step (2) in, weigh the Bi (NO of 2.8 mmol3)3•5H2O is dissolved in 35mL ethylene glycol.
Remaining same embodiment 3.
Claims (7)
1. a kind of float type visible-light photocatalyst, is characterized in that the photocatalyst with fly ash float as carrier, and fly ash float surface is coated with BiOBr or/and BiOI materials, and coverage rate is 50 ﹪～100 ﹪；The fly ash float is hollow spheroidal particle, and a diameter of 20 μm～200 μm, proportion is 0.3g/cm3～0.5g/cm3。
2. a kind of float type visible-light photocatalyst preparation method, is characterized in that it comprises the following steps：
(1) floating bead pretreatment, fly ash float is added in distilled water, cleans 1h～2h, filter, 101 DEG C of dryings under room temperature；
(2) by Bi (NO3)3•5H2O is dissolved in ethylene glycol, Bi (NO3)3•5H2O is 1 with the mass ratio of ethylene glycol:5～40, after solid all dissolves, KBr or/and KI is added, is sufficiently stirred for being dissolved into transparent mixed solution；KBr and Bi (NO in solution3)3•5H2The mol ratio of O is 0～1:1, KI and Bi (NO3)3•5H2The mol ratio of O is 0～1:1, KBr and KI total mole number and Bi (NO3)3•5H2The mol ratio of O is 1:1；
(3) toward step mixed solution (2), add step (1) to prepare fly ash float, is sufficiently stirred for 20min～60min, Bi (NO3)3•5H2O is 0.5～1 with the mass ratio of floating bead:1, continue under stirring in room temperature, then 35.0 wt ﹪ NH are slowly added to in mixed solution3•H2O, the pH value for adjusting system are 5.0～12.0, that is, milky suspension is obtained；
(4) the milky suspension vacuum filter for (3) step being prepared, 0.5h～12h is incubated at 100 DEG C in an oven～200 DEG C of the filter cake for obtaining, then, the powder sample for obtaining is washed with deionized, finally, in drying baker, 90 DEG C are dried 1h～6h, that is, the visible-light photocatalyst that fly ash float loads BiOBr or/and BiOI is obtained.
3. float type visible-light photocatalyst preparation method according to claim 2, it is characterized in that step (2) in, Bi (NO3)3•5H2O is more preferably 1 with the mass ratio of ethylene glycol:15～30.
4. float type visible-light photocatalyst preparation method according to claim 2, it is characterized in that step (2) in, Bi (NO3)3•5H2O is preferably 1 with the mass ratio of ethylene glycol:20～25.
5. float type visible-light photocatalyst preparation method according to claim 1, it is characterized in that step (3) in, NH3•H2The pH value of O adjustment systems is preferably 8.0～10.0.
6. float type visible-light photocatalyst described in claim 1, under visible light illumination, to the application in Organic Pollutants In Water degradation process.
7. float type visible-light photocatalyst described in claim 1, under visible light illumination, to the application in Organic Pollutants In Water rose red b degradation process.
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| CN108906087A (en) * | 2018-07-24 | 2018-11-30 | 深圳市必发达科技有限公司 | The preparation method of floating bead load bismuth oxyiodide catalyst |
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| CN114247455A (en) * | 2022-01-10 | 2022-03-29 | 辽宁大学 | Preparation method and application of supported BiOI photocatalytic material |
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| CN110201687A (en) * | 2018-12-28 | 2019-09-06 | 阜阳师范学院 | A kind of BiOX/ZnSn (OH)6Composite photo-catalyst and its preparation and application |
| CN110152736A (en) * | 2019-05-07 | 2019-08-23 | 同济大学 | Expanded perlite-iodine oxygen bismuth composite photo-catalyst for oily waste water treatment |
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| CN114247455A (en) * | 2022-01-10 | 2022-03-29 | 辽宁大学 | Preparation method and application of supported BiOI photocatalytic material |
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| CN115957816A (en) * | 2022-12-30 | 2023-04-14 | 河海大学 | Preparation method of floating photocatalyst, product obtained by preparation method and application of product |
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