CN107737600A - A kind of ultra-thin Bi4O5Br2The preparation method and application of photochemical catalyst - Google Patents
A kind of ultra-thin Bi4O5Br2The preparation method and application of photochemical catalyst Download PDFInfo
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- CN107737600A CN107737600A CN201711098590.6A CN201711098590A CN107737600A CN 107737600 A CN107737600 A CN 107737600A CN 201711098590 A CN201711098590 A CN 201711098590A CN 107737600 A CN107737600 A CN 107737600A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 40
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 27
- 235000011187 glycerol Nutrition 0.000 claims abstract description 20
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims abstract description 10
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 9
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012153 distilled water Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract description 6
- PPNKDDZCLDMRHS-UHFFFAOYSA-N dinitrooxybismuthanyl nitrate Chemical class [Bi+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PPNKDDZCLDMRHS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011259 mixed solution Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 238000006460 hydrolysis reaction Methods 0.000 claims description 11
- 230000001699 photocatalysis Effects 0.000 claims description 11
- 230000007062 hydrolysis Effects 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- XQSBLCWFZRTIEO-UHFFFAOYSA-N hexadecan-1-amine;hydrobromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[NH3+] XQSBLCWFZRTIEO-UHFFFAOYSA-N 0.000 claims description 5
- 239000000376 reactant Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 125000001246 bromo group Chemical group Br* 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 150000002484 inorganic compounds Chemical class 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- XWNOTOKFKBDMAP-UHFFFAOYSA-N [Bi].[N+](=O)(O)[O-] Chemical compound [Bi].[N+](=O)(O)[O-] XWNOTOKFKBDMAP-UHFFFAOYSA-N 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000007146 photocatalysis Methods 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 6
- 238000007540 photo-reduction reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000026030 halogenation Effects 0.000 description 2
- 238000005658 halogenation reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- CJJMLLCUQDSZIZ-UHFFFAOYSA-N oxobismuth Chemical compound [Bi]=O CJJMLLCUQDSZIZ-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- -1 bismuthino Chemical group 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical class CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 1
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/08—Halides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/802—Visible light
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
The visible light-responded ultra-thin Bi of carbon dioxide is reduced the present invention relates to a kind of4O5Br2The preparation method of photochemical catalyst.The compound of the bismuth element containing 5.1mmol is dissolved in a certain amount of glycerine, then by the brominated element compound (Bi of 2mmol:Br=2.55:1) it is dissolved in a certain amount of glycerine；Stirring reaction 60min in the glycerin solution of five water bismuth nitrates is added dropwise in the glycerin solution of brominated element compound；Mixed solution is transferred in reactor and reacts 16h under the conditions of 160 DEG C, is cleaned and dried to obtain pre-reaction material.Weigh 0.4g predecessors and add 300mL distilled water, hydrolyze 24h under 50 DEG C of bath temperatures, the i.e. ultra-thin Bi of the solid powder being dried to obtain4O5Br2Photochemical catalyst.Response enhancing of the prepared catalyst to visible ray, has higher catalytic activity, particularly has very high activity in reduction carbon dioxide, can be applied to reduce the removal of carbon dioxide.
Description
Technical field
The present invention relates to a kind of catalyst, and in particular to a kind of catalyst for photo-reduction carbon dioxide, more particularly to
A kind of visible light-responded ultra-thin Bi for photo-reduction carbon dioxide4O5Br2Photochemical catalyst preparation method and its usage.
Background technology
China is industrial power, and with the fast development of industry, our demands to the energy are increasing, while fossil energy
The consumption in source is increasing, and fossil energy burning is one of main source of carbon dioxide, so as to cause CO2Discharge capacity with
Day all increasings.Greenhouse effects are CO first of global ten overall situation2It is one of the main reason for causing greenhouse effects, therefore, in order to protect
The environment of human survival is protected, contains global warming, carbon dioxide discharge-reduction is even more important, therefore it is green to seek a kind of high-efficiency and economic
Color environmental protection treatment CO2Method be that Chinese environmental protection works the very urgent problem to be solved.
TiO is found that from Fujishima and Honda in 19722The first of photochemical catalyst decomposition water, open light from this and urge
Change the frontier of research.Photocatalysis technology under illumination effect in semiconductor catalyst by producing the extremely strong active oxygen thing of activity
Kind, object almost can be degraded to nontoxic small-molecule substance to non-selectivity by active oxygen species.1978,
Halmann reports CO using GaP as catalyst first2Have actual use be worth organic matter, such as methanol, methane,
Relative to other CO2Treatment technology, photocatalysis have that environmental pollution is small, reaction condition is gentle, the low advantage of power consumption, so, CO2
Photocatalysis technology is administering CO2With potential use value and wide DEVELOPMENT PROSPECT.
New BixOyXzPhotochemical catalyst, it is by controlling X in halogenation oxygen bismuth BiOX：O value changes the position of conduction band
And obtain the catalyst similar to halogenation oxygen bismuth BiOX structures.It has that nontoxic, cheap, redox ability is strong, chemical property
The characteristics such as stable and anti-light corrosion, obtain widely should in water pollutant degraded, antibacterial, reduction carbon dioxide etc.
With.Leaf in 2016 et al. reports Bi4O5Br2Photochemical catalyst reduces CO under the irradiation of visible ray2When, than BiOBr photochemical catalyst
With stronger photocatalytic activity (Ye L, Jin X, Liu C, et al.Thickness-ultrathin and bismuth-
rich strategies for BiOBr to enhance photoreduction of CO2into solar fuels
[J].Applied Catalysis B:Environmental,2016,187:281-290.)。
The Bi reported in above-mentioned document4O5Br2Although photochemical catalyst has stronger performance compared with BiOBr photochemical catalysts,
It is still undesirable to solar energy utilization rate, it is necessary to further to Bi4O5Br2It is modified to improve its intrinsic photocatalysis performance, mesh
The method of preceding document report has the sides such as metal ion mixing, crystal face nonmetallic ion-doped, compound, exposure is different, ultrathin
Method.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of ultra-thin Bi4O5Br2Photochemical catalyst and its
Preparation method, the catalyst compare more existing Bi4O5Br2Photochemical catalyst has better performance, the preparation method drop of the catalyst
Low production cost, simplifies production technology, the ultra-thin Bi of preparation4O5Br2Photochemical catalyst being capable of photo-reduction dioxy under visible light
Change carbon.
In order to achieve the above object, scheme is prepared present invention employs following：
A kind of ultra-thin Bi for being used under visible ray reduce carbon dioxide4O5Br2Photochemical catalyst, the catalyst is according to catalysis
Bi elements and Br elemental mole ratios are Bi in agent：Br=2.55：1 composition, described photochemical catalyst are that rich bismuth zirconyl oxyhalides bismuthino surpasses
Glimmer catalyst.
The ultra-thin Bi of carbon dioxide is reduced under a kind of visible ray as described above4O5Br2The preparation method of photochemical catalyst, institute
The method of stating comprises the following steps：
(1) under agitation, the compound of the bismuth element containing 5.1mmol is dissolved in a certain amount of glycerine, then by 2mmol
Brominated element compound is dissolved in a certain amount of glycerine, then Bi:Br=2.55:1；
(2) glycerine that the glycerin solution of brominated element compound is added dropwise to bismuth-containing element compound dropwise respectively is molten
Mixed solution stirs in liquid, reaction；
(3) gained mixed solution is put into high-temperature high-pressure reaction kettle, a period of time is reacted under certain temperature and is reacted
Predecessor；
(4) by reactants dry, a certain amount of pre-reaction material is taken to add in a certain amount of distilled water, in certain water-bath temperature
Degree lower hydrolysis certain time, obtain Bi4O5Br2Ultra-thin photochemical catalyst.
Bi prepared by the present invention4O5Br2The catalytic activity of ultra-thin photochemical catalyst is better than Bi4O5Br2Photocatalytic activity.It is ultra-thin
Bi4O5Br2The specific surface area of catalyst is 107.9m2g-1, Bi4O5Br2The specific surface area of catalyst is 61.2m2g-1, specific surface area
Increase improve the catalytic activity of catalyst.Prepared photochemical catalyst can inspire more light induced electrons under visible light,
The compound of electron-hole can be suppressed, photocatalytic activity significantly improves, and particularly reducing carbon dioxide has very high activity, and
Preparation method is simple, mild condition, reaches the purpose for reducing cost, simplifying production procedure, can be applied to reduce carbon dioxide.
The present invention is by the way that the glycerin solution containing bromo element, the timing of stirring one are added dropwise into the glycerin solution containing bismuth element
Between after certain reaction time, obtain ultra-thin Bi4O5Br2Predecessor, predecessor surpassed after certain hydrolysis again
Thin Bi4O5Br2Catalyst.
The inorganic compound containing bismuth element is selected from five water bismuth nitrates.
Preferably, the dosage of the glycerine of the water bismuth nitrates of dissolving 5.1mmol five is 30~50mL, such as 30mL,
35mL, 40mL, 45mL, 50mL, preferably 40mL.
Preferably, the organic compound containing bromo element is selected from cetyl ammonium bromide.
Preferably, the glycerine dosage of the dissolving cetyl ammonium bromide is 30~50mL, such as 30mL, 35mL,
40mL, 45mL, 50mL, preferably 40mL.
The mixing time is 20~100min, such as 20min, 40min, 60min, 80min, 100min, preferably
60min。
The reaction temperature in a kettle is 120~200 DEG C, such as 120 DEG C, 140 DEG C, 160 DEG C, 180 DEG C, 200
DEG C, preferably 160 DEG C.
The reaction time in a kettle is 14~18h, such as 14h, 15h, 16h, 17h, 18h, preferably 16h.
The temperature of the drying is 60~100 DEG C, such as 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 90 DEG C, preferably 80 DEG C..
The pyroreaction and drying are carried out in an oven.
Preferably, the amount of the hydrolysis reactant is 0.2~0.6g, such as 0.2g, 0.3g, 0.4g, 0.5g, 0.6g, excellent
Select 0.4g.
The distilled water dosage of the hydrolysis reactant is 100~500mL, such as 100mL, 200mL, 300mL, 400mL,
500mL, preferably 300mL.
Bath temperature selected by the hydrolysis is 40~70 DEG C, such as 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 65
DEG C, 70 DEG C, preferably 50 DEG C.
The ultra-thin Bi4O5Br2 hydrolysis times are 21~26h, such as 21h, 22h, 23h, 24h, 25h, 26h, preferably
24h。
The drying time is 8~18h, such as 8h, 10h, 12h, 14h, 16h, 18h, preferably 12h, the drying are being dried
Carried out in case.
The drying is carried out in an oven.
One kind is used to reduce the ultra-thin Bi of carbon dioxide under visible ray4O5Br2The purposes of photochemical catalyst, the ultra-thin Bi4O5Br2
Photocatalysis is used for photo-reduction carbon dioxide under visible ray.
Compared with prior art, the present invention has the advantages that：
(1) present invention optimizes the preparation technology of such photochemical catalyst, the mesh for reducing cost, simplifying production procedure has been reached
's；
(2) photochemical catalyst of the present invention has the structure of ultra-thin body, improves photocatalytic activity；
(3) ultra-thin Bi of the present invention is used4O5Br2Photochemical catalyst, it is former under visible light exposure of the wavelength more than 420nm
Beginning CO2Concentration be 200 μm of ol/g, the ultra-thin Bi in 2h4O5Br2、Bi4O5Br2Reduce CO2Efficiency be respectively 91%, 34%,
Photocatalysis performance greatly improved；
(4) present invention uses nontoxic component, reduces the harm to health and ecological environment；
(5) photochemical catalyst that the present invention is prepared is located after need not adding other chemical reagent and other preparations
Reason, method are simple.
Accompanying drawing and brief description of the drawings
Fig. 1 is ultra-thin Bi of the present invention4O5Br2The XRD spectra of photochemical catalyst；Fig. 2 is of the present invention ultra-thin
Bi4O5Br2The BET spectrograms of photochemical catalyst；
Embodiment
For the present invention is better described, technical scheme is readily appreciated, of the invention is typical but non-limiting
Embodiment is as follows：
Embodiment 1
The water bismuth nitrates of 2.4738g five are weighed with assay balance to be dissolved in respectively in 40mL glycerine, weigh 0.728g hexadecanes
Base ammonium bromide is dissolved in 40mL glycerine, and the solution containing cetyl ammonium bromide is added dropwise into above-mentioned five water with rubber head dropper
In the glycerin solution of bismuth nitrate, under room temperature condition after magnetic agitation 60min, mixed solution is transferred in reactor in baking oven
In to react 16h under the conditions of 160 DEG C, clean and collect precipitation, this precipitation is dried into 12h at 80 DEG C in an oven, then obtained
Pre-reaction material.Weigh pre-reaction material obtained by 0.4g and add 300mL distilled water, ultra-thin Bi at 50 DEG C of bath temperature4O5Br2
24h is hydrolyzed, reaction gained is deposited at 80 DEG C and dries 12h, obtained solid powder is ultra-thin Bi4O5Br2Photochemical catalyst.
The gained ultra-thin body Bi of example 14O5Br2Photochemical catalyst and Bi4O5Br2The various performance numbers of photochemical catalyst are listed in table
One.As can be seen from the table, the ultra-thin Bi that prepared by embodiment 14O5Br2Photochemical catalyst specific surface area is 107.9m2g-1, Bi4O5Br2
Specific surface area of catalyst is 61.2m2g-1, ultra-thin Bi under visible light4O5Br2Photochemical catalyst removes the efficiency of reduction carbon dioxide
It is Bi4O5Br23 times of photochemical catalyst.
Photocatalytic activity test is characterized by reduction carbon dioxide under visible light in table one, wherein with 500W xenon lamps
As light source, the visible ray of 420~780nm scopes is obtained after optical filter, catalyst per dosage is 0.02g, original CO2's
Concentration is 200 μm of ol/g, the composition of gas Chromatographic Determination institute reducing substances is used after reduction, and then determine CO2Reduction efficiency.
Table 1
It should be noted that and understand, in the case of the scope of the present invention required by not departing from appended claims,
Various modifications and improvements can be made to the present invention of foregoing detailed description.It is therefore desirable to the scope of the technical scheme of protection is not
Limited by given any specific exemplary teachings.
Applicant states that the present invention illustrates the method detailed of the present invention, but not office of the invention by above-described embodiment
It is limited to above-mentioned method detailed, that is, does not mean that the present invention has to rely on above-mentioned method detailed and could implemented.Art
Technical staff is it will be clearly understood that any improvement in the present invention, to the equivalence replacement and auxiliary element of the various raw materials of product of the present invention
Addition, the selection etc. of concrete mode, all fall within protection scope of the present invention and it is open within the scope of.
Claims (8)
- A kind of 1. ultra-thin Bi4O5Br2Photochemical catalyst, it is characterised in that the catalyst is a kind of a certain proportion of according to controlling The ultra-thin photochemical catalyst of the ratio of Bi elements and Br elements synthesis, has good photocatalytic activity.
- 2. it is used under visible ray reduce the Bi of carbon dioxide as claimed in claim 14O5Br2The preparation side of ultra-thin photochemical catalyst Method, it is characterised in that methods described comprises the following steps：Under agitation, the compound of the bismuth element containing 5.1mmol is dissolved in a certain amount of glycerine, then by the brominated members of 2mmol Plain compound is dissolved in a certain amount of glycerine, wherein Bi:Br=2.55:1；The glycerin solution of brominated element compound is added dropwise to dropwise respectively in the glycerin solution of bismuth-containing element compound and mixed Close solution stirring, reaction；Gained mixed solution is put into high-temperature high-pressure reaction kettle, is reacted under certain temperature and obtains pre-reaction material for a period of time, Reactants dry is obtained into predecessor；Take a certain amount of pre-reaction material to add in a certain amount of distilled water, hydrolyze certain time under certain bath temperature, obtain To ultra-thin Bi4O5Br2Photochemical catalyst.
- 3. method as claimed in claim 2, it is characterised in that the inorganic compound containing bismuth element is selected from five water nitric acid Bismuth, the organic compound containing bromo element are selected from cetyl ammonium bromide.Preferably, the water bismuth nitrates of dissolving 5.1mmol five, the dosage of glycerine of cetyl ammonium bromide are 30~50mL, Such as 30mL, 35mL, 40mL, 45mL, 50mL, preferably 40mL.
- 4. the method as described in claim 2-3, it is characterised in that the mixing time is 20~100min, such as 20min, 40min, 60min, 80min, 100min, preferably 60min.
- 5. the method as described in claim 2-4, it is characterised in that the reaction condition in a kettle：Preferably, the reaction temperature is 120~200 DEG C, such as 120 DEG C, 140 DEG C, 160 DEG C, 180 DEG C, 200 DEG C, preferably 160 ℃；Preferably, the reaction time in a kettle is 14~18h, such as 14h, 15h, 16h, 17h, 18h, preferably 16h, The pyroreaction is carried out in an oven.
- 6. the method as described in claim 2-5, it is characterised in that the condition of hydrolysis is：Preferably, the amount of the hydrolysis predecessor is 0.2~0.6g, such as 0.2g, 0.3g, 0.4g, 0.5g, 0.6g, preferably 0.4g；Preferably, the distilled water dosage of the hydrolysis predecessor is 100~500mL, such as 100mL, 200mL, 300mL, 400mL, 500mL, preferably 300mL；Preferably, the bath temperature selected by the hydrolysis is 40~70 DEG C, such as 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 65 DEG C, 70 DEG C, preferably 50 DEG C；Preferably, the ultra-thin Bi4O5Br2Hydrolysis time is 21~26h, such as 21h, 22h, 23h, 24h, 25h, 26h, preferably 24h。
- 7. the method as described in claim 2-6 is characterized in that, drying condition is：Preferably, the temperature of the drying is 60~100 DEG C, such as 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 90 DEG C, preferably 80 DEG C；Preferably, the drying time is 8~18h, such as 8h, 10h, 12h, 14h, 16h, 18h, preferably 12h, the drying exist Carried out in baking oven.
- 8. the ultra-thin Bi of carbon dioxide is reduced under a kind of visible ray as claimed in claim 14O5Br2The purposes of photochemical catalyst, its It is characterised by, the ultra-thin Bi4O5Br2Photochemical catalyst is used for catalysis reduction carbon dioxide under visible ray.
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| CN108435215A (en) * | 2018-03-22 | 2018-08-24 | 西南石油大学 | Remove the photochemical catalyst and its preparation method and application of hydroxypropyl guar in fracturing fluid recovery (backflow) liquid |
| CN108855151A (en) * | 2018-06-11 | 2018-11-23 | 西南石油大学 | A kind of preparation method and applications of ultra-thin bismuth oxyiodide photochemical catalyst |
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| CN109569735A (en) * | 2018-11-29 | 2019-04-05 | 南昌航空大学 | A kind of bismuth series photocatalyst and its preparation method and application |
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| CN110201686A (en) * | 2019-07-02 | 2019-09-06 | 徐州工程学院 | A kind of preparation method for the high-specific surface area BiOBr photochemical catalyst that { 110 } face preferentially exposes |
| CN110523420A (en) * | 2019-08-26 | 2019-12-03 | 太原理工大学 | A kind of Bi4O5Br2/ thin layer Ti3C2The preparation method and applications of composite photocatalyst |
| CN110538664A (en) * | 2019-09-23 | 2019-12-06 | 重庆科技学院 | preparation method of Bi4O5Br2/BiOBr composite photocatalyst for oilfield wastewater treatment |
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| CN115364873A (en) * | 2022-08-22 | 2022-11-22 | 电子科技大学长三角研究院(湖州) | Hollow tubular ultrathin photocatalyst and preparation method thereof |
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| CN110538664A (en) * | 2019-09-23 | 2019-12-06 | 重庆科技学院 | preparation method of Bi4O5Br2/BiOBr composite photocatalyst for oilfield wastewater treatment |
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| CN111254461A (en) * | 2020-01-19 | 2020-06-09 | 安徽大学 | Tungsten oxide/bismuth oxyiodide heterojunction material for photo-reduction of carbon dioxide and preparation method and application thereof |
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| CN111701601A (en) * | 2020-06-05 | 2020-09-25 | 南阳师范学院 | Bi4O5Br2Preparation method of self-assembled hollow flower ball and photocatalytic reduction of CO2Application of aspects |
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| CN113117522A (en) * | 2021-05-28 | 2021-07-16 | 陕西科技大学 | CO reduction for improving Bi plasma photocatalyst2Method of activity |
| CN115364873A (en) * | 2022-08-22 | 2022-11-22 | 电子科技大学长三角研究院(湖州) | Hollow tubular ultrathin photocatalyst and preparation method thereof |
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