CN111905712A - Nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and preparation method thereof - Google Patents
Nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and preparation method thereof Download PDFInfo
- Publication number
- CN111905712A CN111905712A CN202010937373.7A CN202010937373A CN111905712A CN 111905712 A CN111905712 A CN 111905712A CN 202010937373 A CN202010937373 A CN 202010937373A CN 111905712 A CN111905712 A CN 111905712A
- Authority
- CN
- China
- Prior art keywords
- aluminum
- bismuth vanadate
- composite photocatalyst
- bismuth
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052797 bismuth Inorganic materials 0.000 title claims abstract description 76
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 70
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 title claims abstract description 68
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 61
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000002073 nanorod Substances 0.000 claims abstract description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 19
- 239000002243 precursor Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000001354 calcination Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 8
- 229910017604 nitric acid Inorganic materials 0.000 claims description 8
- 229940043267 rhodamine b Drugs 0.000 claims description 8
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims description 7
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910003206 NH4VO3 Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- 229910052724 xenon Inorganic materials 0.000 claims description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 4
- XNDZQQSKSQTQQD-UHFFFAOYSA-N 3-methylcyclohex-2-en-1-ol Chemical group CC1=CC(O)CCC1 XNDZQQSKSQTQQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims 1
- 230000001699 photocatalysis Effects 0.000 abstract description 27
- 239000000463 material Substances 0.000 abstract description 7
- 230000031700 light absorption Effects 0.000 abstract description 5
- 238000007146 photocatalysis Methods 0.000 abstract description 4
- 238000005215 recombination Methods 0.000 abstract description 4
- 230000006798 recombination Effects 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 32
- 229910002915 BiVO4 Inorganic materials 0.000 description 17
- 239000003054 catalyst Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 238000013032 photocatalytic reaction Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/20—Vanadium, niobium or tantalum
- B01J23/22—Vanadium
-
- B01J35/39—
-
- B01J35/61—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention belongs to the technical field of photocatalysis, and particularly relates to a preparation method and application of a nanorod-shaped aluminum/bismuth vanadate composite photocatalyst. According to the invention, by compounding the nanorod bismuth vanadate and the aluminum, the composite photocatalytic material with excellent photocatalytic performance is obtained, the problems of low recombination rate and low light absorption rate of electron hole pairs in a pure-phase photocatalyst in the prior art are solved, and the composite photocatalytic material can be widely popularized in the fields of photocatalysis and the like.
Description
Technical Field
The invention relates to the technical field of photocatalysis, in particular to a nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and a preparation method thereof
Background
Dye wastewater is one of the common sewage difficult to treat due to high pollutant concentration, deep chromaticity, high toxicity, poor biodegradability and the like. The photocatalytic technology is considered as a potential effective method in wastewater treatment, the traditional semiconductor photocatalyst has a large band gap, the photocatalytic performance is poor in a solar lamp, and the practical application of the photocatalytic technology is severely limited.
BiVO4Monoclinic BiVO with medium band gap (about 2.4eV), low toxicity and high chemical stability4Has the highest catalytic activity. Most of the single BiVO4Has the defects of non-porous structure, low surface area and the like, leads to low light absorption rate and is not beneficial to photocatalytic reaction.
Disclosure of Invention
In view of the above, the present invention aims to provide a nanorod aluminum/bismuth vanadate composite photocatalyst and a preparation method thereof. The invention mainly utilizes metal doping to compound the photocatalytic material, and the prepared nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst is compared with pure-phase BiVO4The photocatalyst has excellent light absorption efficiency, accelerates the migration of photon-generated carriers, realizes the effective separation of electrons/holes, thereby inhibiting the recombination of the photon-generated carriers, and can be widely applied to photocatalytic degradation of pollutants.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
on one hand, the invention provides an aluminum/bismuth vanadate composite photocatalyst, and the microstructure of the composite photocatalyst is that aluminum particles are loaded on bismuth vanadate; the bismuth vanadate is in a nano rod shape.
Preferably, the length of the nanorod is 10-15 um.
In another aspect, the invention provides a preparation method of the aluminum/bismuth vanadate composite photocatalyst, which includes the following steps:
(1) dissolving a bismuth source in concentrated nitric acid, and slowly stirring to obtain a solution A;
(2) dissolving a vanadium source in sodium hydroxide, and uniformly stirring to obtain a solution B;
(3) slowly dropwise adding the solution B into the solution A under the stirring condition at 15-35 ℃, stirring, adding an aluminum source, and adjusting the pH to be neutral by using sodium hydroxide to obtain a mixture;
(4) reacting the mixture at 80-90 ℃;
(5) after the reaction is finished, naturally cooling to room temperature, centrifuging, washing, drying and grinding the sample to obtain an aluminum/bismuth vanadate precursor;
(6) and putting the aluminum/bismuth vanadate precursor into a muffle furnace, and calcining at 320-350 ℃ to obtain the aluminum/bismuth vanadate composite photocatalyst.
Preferably, the bismuth source is Bi (NO)3)3·5H2O (purity is more than 99 percent) and the vanadium source is NH4VO3(purity greater than 99%); the aluminum source is aluminum nitrate nonahydrate (the content of molar mass is more than 99%); the mass concentration of the concentrated nitric acid is 68-70%; the mass concentration of the sodium hydroxide is 40-50%.
Preferably, in the step (3), the dropping speed is 220-; the molar ratio of the bismuth source of the solution A to the vanadium source of the solution B is 1: 1; the molar ratio of the aluminum source to the bismuth source is (0.01-0.1): 1; the pH value of the mixture is 7-8. In the step (1), the stirring speed is 25-30 r/min.
Preferably, in the step (4), the constant-temperature reaction time is 10-12 h.
Preferably, in the step (5), the centrifugal product is washed with absolute ethyl alcohol and deionized water for 3-5 times respectively, and the drying time is 8-12 h; the drying temperature is 60-80 ℃.
Preferably, in the step (6), the calcination time is 4-6 h.
The invention also provides application of the nano rod-shaped aluminum/bismuth vanadate composite photocatalyst in the technical scheme in photocatalytic degradation of pollutants. And (3) carrying out adsorption photocatalytic degradation reaction on rhodamine B by using the aluminum/bismuth vanadate composite photocatalyst under the irradiation of a xenon lamp.
Advantageous effects
1. Pure phase BiVO4Has the defects of non-porous structure, low surface area and the like, causes low light absorption rate, is not beneficial to photocatalytic reaction, and has single BiVO4The method has high electron hole pair recombination rate and low photocatalytic efficiency, and the nano rod-shaped aluminum/bismuth vanadate composite photocatalyst is prepared by a hydrothermal method and a heat treatment process. Compared with pure phase BiVO4The Al has the advantages of lower strength, higher oxidation resistance, higher reflectivity and the like, can be better compounded with a photocatalyst, and has more convenient and simpler technology compared with other doping; meanwhile, because the Al Fermi level is lower, electrons and holes can be quickly and effectively separated, the adsorption rate of rhodamine b can reach 99.8 percent within 90 minutes, and the photocatalytic activity of the catalyst is greatly improved.
2. The aluminum-doped bismuth vanadate photocatalyst is prepared by directly adding conventional granular BiVO into a solution4Prepared into a nano rod shape, and greatly increases BiVO4The specific surface area of the photocatalyst improves the absorptivity of the photocatalyst to light, provides more landing sites for photo-generated electron-hole pairs, enhances the photocatalytic activity of the photocatalyst, and can reach nearly 100% of the degradation rate of target pollutants. The aluminum-doped bismuth vanadate photocatalyst has the advantages that the preparation method is simpler and more convenient, the preparation cost and time are saved, the photocatalytic performance is more stable, and the influence on the photocatalyst due to environmental factors is smaller.
3. The invention is in nano-rod-shaped BiVO4Al doping can accelerate the migration of photon-generated carriers and realize the effective separation of electrons and holes, thereby improving the photocatalytic performance of the material and extending the absorption wavelength range of the photocatalyst to a visible light region. The data of the examples show that: when the dosage of the nanorod-shaped aluminum/bismuth vanadate composite photocatalyst is 50mg and the illumination is carried out for 90min, the removal rate of rhodamine B in a rhodamine B solution with the concentration of 20mg/L is 99.8%.
In conclusion, the composite photocatalytic material with excellent photocatalytic performance is obtained by compounding the nanorod bismuth vanadate and the aluminum, the problems of low recombination rate and low light absorption rate of electron hole pairs in the pure-phase photocatalyst in the prior art are solved, and the composite photocatalytic material can be widely popularized in the fields of photocatalysis and the like.
Drawings
FIG. 1 is SEM images of nanorod-shaped bismuth vanadate and aluminum/bismuth vanadate composite photocatalyst obtained in comparative example (left side) and example 1 (right side);
FIG. 2 is an XRD diffraction pattern of the nanorod aluminum/bismuth vanadate composite photocatalyst obtained in examples 1-4;
FIG. 3 is a graph showing photocatalytic degradation curves of the nanorod aluminum/bismuth vanadate composite catalysts obtained in examples 1 to 4 and the bismuth vanadate catalyst of comparative example 1;
FIG. 4 is a DRS map of the nanorod aluminum/bismuth vanadate composite photocatalyst obtained in examples 1-4 and the bismuth vanadate catalyst of comparative example 1.
Detailed Description
The preparation method of the nanorod aluminum/bismuth vanadate composite photocatalyst provided by the invention is further described below with reference to examples, so that a person skilled in the art can better understand the invention, but the invention is not limited to the following examples.
Example 1
In this embodiment, the specific steps of preparing the nanorod aluminum/bismuth vanadate composite photocatalyst are as follows:
(1)24.254g of Bi (NO)3)3·5H2O dissolved in 10mL of HNO3(4mol/L) slowly stirring for 10min to obtain a solution A;
(2)5.849g of NH4VO3Dissolving in 10mL of NaOH (2mol/L) solution, and uniformly stirring to obtain a solution B;
(3) slowly dripping the solution B into the solution A under the condition of uniform stirring, stirring for 30min, and adding 0.188g of Al (NO)3)3·9H2O, simultaneously adjusting the pH value of the mixed solution to 7.0 by using 2mol/L NaOH, and continuing to magnetically stir for 30 min;
(4) transferring the mixture in the step (3) into a water bath kettle to react for 12 hours at a constant temperature of 90 ℃;
(5) after the reaction is finished and the mixture is naturally cooled, centrifuging the mixture, washing the centrifuged product for 3 times to be neutral by using absolute ethyl alcohol and deionized water respectively, drying the product for 12 hours at the temperature of 60 ℃, and grinding the product for later use by using an agate mortar to obtain the aluminum/bismuth vanadate precursor.
(6) Calcining the precursor in a muffle furnace at 320 ℃ for 4h to obtain the aluminum/bismuth vanadate photocatalyst, namely 1% Al/BiVO4。
Example 2
In this embodiment, the specific steps of preparing the nanorod aluminum/bismuth vanadate composite photocatalyst are as follows:
(1)24.254g of Bi (NO)3)3·5H2O dissolved in 10mL of HNO3(4mol/L) slowly stirring for 10min to obtain a solution A;
(2)5.849g of NH4VO3Dissolving in 10mL of NaOH (2mol/L) solution, and uniformly stirring to obtain a solution B;
(3) slowly dripping the solution B into the solution A under the condition of uniform stirring, stirring for 30min, and adding 0.375g of Al (NO)3)3·9H2O, simultaneously adjusting the pH value of the mixed solution to 7.0 by using 2mol/L NaOH, and continuing to magnetically stir for 30 min;
(4) transferring the mixture in the step (3) into a water bath kettle to react for 12 hours at a constant temperature of 90 ℃;
(5) after the reaction is finished and the mixture is naturally cooled, centrifuging the mixture, washing the centrifuged product for 3 times to be neutral by using absolute ethyl alcohol and deionized water respectively, drying the product for 12 hours at the temperature of 60 ℃, and grinding the product for later use by using an agate mortar to obtain the aluminum/bismuth vanadate precursor.
(6) The precursor is put into a muffle furnace for calcination, and the calcination is carried out for 4 hours at the temperature of 320 ℃ to obtain the aluminum/bismuth vanadate photocatalyst, namely 2% Al/BiVO4。
Example 3
In this embodiment, the specific steps of preparing the nanorod aluminum/bismuth vanadate composite photocatalyst are as follows:
(1)24.254g of Bi (NO)3)3·5H2O dissolved in 10mL of HNO3(4mol/L) in solutionSlowly stirring for 10min to obtain a solution A;
(2)5.849g of NH4VO3Dissolving in 10mL of NaOH (2mol/L) solution, and uniformly stirring to obtain a solution B;
(3) slowly dripping the solution B into the solution A under the condition of uniform stirring, stirring for 30min, and adding 0.938g of Al (NO)3)3·9H2O, simultaneously adjusting the pH value of the mixed solution to 7.0 by using 2mol/L NaOH, and continuing to magnetically stir for 30 min;
(4) transferring the mixture in the step (3) into a water bath kettle to react for 12 hours at a constant temperature of 90 ℃;
(5) after the reaction is finished and the mixture is naturally cooled, centrifuging the mixture, washing the centrifuged product for 3 times to be neutral by using absolute ethyl alcohol and deionized water respectively, drying the product for 12 hours at the temperature of 60 ℃, and grinding the product for later use by using an agate mortar to obtain the aluminum/bismuth vanadate precursor.
(6) The precursor is put into a muffle furnace for calcination, and the calcination is carried out for 4 hours at the temperature of 320 ℃ to obtain the aluminum/bismuth vanadate photocatalyst, namely 5 percent Al/BiVO4。
Example 4
In this embodiment, the specific steps of preparing the nanorod aluminum/bismuth vanadate composite photocatalyst are as follows:
(1)24.254g of Bi (NO)3)3·5H2O dissolved in 10mL of HNO3(4mol/L) slowly stirring for 10min to obtain a solution A;
(2)5.849g of NH4VO3Dissolving in 10mL of NaOH (2mol/L) solution, and uniformly stirring to obtain a solution B;
(3) slowly dripping the solution B into the solution A under the condition of uniform stirring, stirring for 30min, and adding 1.876g of Al (NO)3)3·9H2O, simultaneously adjusting the pH value of the mixed solution to 7.0 by using 2mol/L NaOH, and continuing to magnetically stir for 30 min;
(4) transferring the mixture in the step (3) into a water bath kettle to react for 12 hours at a constant temperature of 90 ℃;
(5) after the reaction is finished and the mixture is naturally cooled, centrifuging the mixture, washing the centrifuged product for 3 times to be neutral by using absolute ethyl alcohol and deionized water respectively, drying the product for 12 hours at the temperature of 60 ℃, and grinding the product for later use by using an agate mortar to obtain the aluminum/bismuth vanadate precursor.
(6) Calcining the precursor in a muffle furnace at 320 ℃ for 4h to obtain the aluminum/bismuth vanadate photocatalyst, namely 10% Al/BiVO4。
Comparative example 1
Differs from example 1 only in that step (3) is carried out without addition of Al (NO)3)3·9H2O to obtain bismuth vanadate photocatalyst, BiVO4。
The catalyst of comparative example 1 and the catalyst prepared in the above example are characterized, fig. 1 is an SEM spectrum of the nanorod-shaped bismuth vanadate and aluminum/bismuth vanadate composite catalyst obtained in comparative example 1 and example 1, and fig. 1 illustrates pure-phase BiVO4Has the defects of non-porous structure, low surface area and the like, and the specific surface area is increased after aluminum particles are doped, so that the absorption rate of light is increased, and the photocatalytic reaction is facilitated.
FIG. 2 is an XRD diffraction pattern of the nanorod aluminum/bismuth vanadate composite photocatalyst obtained in examples 1-4; FIG. 2 illustrates that doping of aluminum particles does not alter BiVO4So that it still has photocatalytic activity.
Application example
The nanorod-shaped aluminum/bismuth vanadate composite photocatalyst obtained in the examples 1 to 4 and the comparative example 1 is used for carrying out an adsorption photocatalytic degradation experiment on rhodamine B under the irradiation of a xenon lamp.
The experimental conditions were: 50mL of rhodamine B (20mg/L) aqueous solution is measured and placed under a xenon lamp, 50mg of nano rod-shaped aluminum/bismuth vanadate composite photocatalyst is added, the mixture is stirred for 30min in the dark to achieve adsorption-desorption balance, the lamp is turned on to carry out photocatalytic reaction, and an ultraviolet spectrophotometer is used for sampling and filtering at regular time to measure the absorbance at 552 nm.
By adjusting the addition amount of aluminum nitrate, the nanorod-shaped aluminum/bismuth vanadate composite photocatalyst is prepared by a hydrothermal method, the degradation effect of the nanorod-shaped aluminum/bismuth vanadate composite photocatalyst on organic pollutants under the condition of simulating visible light irradiation is respectively considered under the condition of the same catalyst amount (50mg), and the photocatalytic result shows that the single bismuth vanadate photocatalyst has the degradation effect but is not obvious, but the photocatalytic performance is obvious after the single bismuth vanadate photocatalyst is compounded with aluminumIt is remarkably improved. Furthermore, 1% Al/BiVO4The composite photocatalyst shows the optimal photocatalytic performance, namely the degradation rate of rhodamine B can reach 99.8% under the illumination of 90min, which shows that the prepared nano rod-shaped aluminum/bismuth vanadate composite photocatalyst has excellent photocatalytic performance and can be used for efficiently treating organic pollutants in water.
FIG. 3 illustrates the compounding of nanorod bismuth vanadate and aluminum particles to obtain a composite photocatalytic material with excellent photocatalytic performance, 1% Al/BiVO4The composite photocatalyst has the best photocatalytic performance.
FIG. 4 illustrates BiVO in the shape of a nanorod4Al doping accelerates the migration of photon-generated carriers, realizes the effective separation of electrons and holes, and expands the absorption wavelength range of the photocatalyst to a visible light region.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An aluminum/bismuth vanadate composite photocatalyst is characterized in that aluminum particles are loaded on bismuth vanadate; the bismuth vanadate is in a nano rod shape.
2. The aluminum/bismuth vanadate composite photocatalyst according to claim 1, wherein the nanorods are 10-15 um long.
3. A method for preparing the aluminum/bismuth vanadate composite photocatalyst as claimed in claim 1, wherein the method comprises the following steps:
(1) dissolving a bismuth source in concentrated nitric acid, and stirring to obtain a solution A;
(2) dissolving a vanadium source in sodium hydroxide, and uniformly stirring to obtain a solution B;
(3) stirring at 15-35 ℃, dropwise adding the solution B into the solution A, stirring, adding an aluminum source, and adjusting the pH to be neutral by using sodium hydroxide to obtain a mixture;
(4) reacting the mixture at 80-90 ℃;
(5) after the reaction is finished, naturally cooling to room temperature, centrifuging, washing, drying and grinding the sample to obtain an aluminum/bismuth vanadate precursor;
(6) and putting the aluminum/bismuth vanadate precursor into a muffle furnace, and calcining at 320-350 ℃ to obtain the aluminum/bismuth vanadate composite photocatalyst.
4. The method for preparing the aluminum/bismuth vanadate composite photocatalyst according to claim 3, wherein the bismuth source is Bi (NO)3)3·5H2O, the vanadium source is NH4VO3(ii) a The aluminum source is aluminum nitrate nonahydrate; the mass concentration of the concentrated nitric acid is 68-70%; the mass concentration of the sodium hydroxide is 40-50%.
5. The method for preparing the aluminum/bismuth vanadate composite photocatalyst according to claim 3, wherein in the step (1), the stirring speed is 25-30 r/min.
6. The method for preparing the aluminum/bismuth vanadate composite photocatalyst as defined in claim 3, wherein in the step (3), the dropping speed is 220-240 ml/min; the molar ratio of the bismuth source of the solution A to the vanadium source of the solution B is 1: 1; the molar ratio of the aluminum source to the bismuth source is (0.01-0.1): 1; the pH value of the mixture is 7-8.
7. The method for preparing the aluminum/bismuth vanadate composite photocatalyst according to claim 3, wherein in the step (4), the constant-temperature reaction time is 10-12 hours.
8. The method for preparing the aluminum/bismuth vanadate composite photocatalyst according to claim 3, wherein in the step (5), the centrifugation product is washed with absolute ethyl alcohol and deionized water for 3-5 times respectively, and the drying time is 8-12 hours; the drying temperature is 60-80 ℃; in the step (6), the calcination time is 4-6 h.
9. The application of the aluminum/bismuth vanadate composite photocatalyst disclosed in claim 1 in photocatalytic degradation of pollutants.
10. The application of claim 9, wherein the aluminum/bismuth vanadate composite photocatalyst is used for a photocatalytic degradation reaction of rhodamine B under the irradiation of a xenon lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010937373.7A CN111905712A (en) | 2020-09-08 | 2020-09-08 | Nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010937373.7A CN111905712A (en) | 2020-09-08 | 2020-09-08 | Nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111905712A true CN111905712A (en) | 2020-11-10 |
Family
ID=73266815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010937373.7A Pending CN111905712A (en) | 2020-09-08 | 2020-09-08 | Nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111905712A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001496A (en) * | 2014-06-11 | 2014-08-27 | 福州大学 | BiVO4 nanosheet composite photocatalyst, and preparation method and application thereof |
| CN104014326A (en) * | 2014-06-25 | 2014-09-03 | 上海交通大学 | Efficient photocatalyst for bismuth vanadate nanorod and preparation method of catalyst |
| CN104148054A (en) * | 2014-08-27 | 2014-11-19 | 哈尔滨工业大学 | Preparation method of bismuth vanadate nanorod bundle |
| CN107200351A (en) * | 2017-06-09 | 2017-09-26 | 钦州学院 | The preparation method of pucherite nanometer rods |
| CN107601561A (en) * | 2017-09-13 | 2018-01-19 | 佛山市力合通新材料有限公司 | The preparation method of nanometer pucherite yellow uitramarine |
-
2020
- 2020-09-08 CN CN202010937373.7A patent/CN111905712A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001496A (en) * | 2014-06-11 | 2014-08-27 | 福州大学 | BiVO4 nanosheet composite photocatalyst, and preparation method and application thereof |
| CN104014326A (en) * | 2014-06-25 | 2014-09-03 | 上海交通大学 | Efficient photocatalyst for bismuth vanadate nanorod and preparation method of catalyst |
| CN104148054A (en) * | 2014-08-27 | 2014-11-19 | 哈尔滨工业大学 | Preparation method of bismuth vanadate nanorod bundle |
| CN107200351A (en) * | 2017-06-09 | 2017-09-26 | 钦州学院 | The preparation method of pucherite nanometer rods |
| CN107601561A (en) * | 2017-09-13 | 2018-01-19 | 佛山市力合通新材料有限公司 | The preparation method of nanometer pucherite yellow uitramarine |
Non-Patent Citations (1)
| Title |
|---|
| JINHONG BI等: ""Effects of aluminum substitution on photocatalytic property of BiVO4 under visible light irradiation"", 《MATERIALS RESEARCH BULLETIN》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113663693B (en) | Preparation method of indium zinc sulfide-titanium dioxide composite material and application of indium zinc sulfide-titanium dioxide composite material in production of hydrogen peroxide for wastewater treatment | |
| CN111215112A (en) | Preparation method and application of composite photocatalyst | |
| CN105148983B (en) | Photochemical catalyst of dyestuff and preparation method thereof in a kind of degrading waste water | |
| CN111068715B (en) | Ag/Bi 2 O 3 /CuBi 2 O 4 Preparation method of nanofiber composite photocatalyst | |
| CN107176671B (en) | WO (WO)3Method for degrading phenol wastewater | |
| CN109126853A (en) | A kind of counter opal g-C with carbon defects3N4The preparation method of photochemical catalyst | |
| CN107986380B (en) | N-doped wrapped TiO2Process for degrading wastewater by using photocatalyst | |
| CN111330615B (en) | Nano bismuth oxychloride/carbon nitride composite material and preparation method and application thereof | |
| CN106268908A (en) | A kind of graphite-phase C removing removal organic polluter3n4doping TiO2float type ecological restoration material of load expanded perlite and preparation method thereof | |
| CN109292895B (en) | Photocatalyst Li2SnO3Preparation method and application of | |
| CN111874988A (en) | Based on multi-element co-doped TiO2Organic wastewater treatment method of nano photocatalytic material | |
| CN111036272B (en) | C3N4/LaVO4Composite photocatalyst and preparation method thereof | |
| CN110605138B (en) | Preparation method and application of tantalum oxygen nitrogen/foamed nickel photocatalytic contact oxide film | |
| CN104998666B (en) | A kind of method and catalyst applications for preparing bowknot shape fluorine oxygen bismuth photochemical catalyst | |
| CN108940349B (en) | Method for removing dye pollutants by using silver chromate/sulfur-doped nitrogen carbon Z-type photocatalyst | |
| CN113145158B (en) | Stripped tubular carbon nitride photocatalyst and preparation method and application thereof | |
| CN110615470A (en) | One-dimensional metal-doped rutile titanium dioxide nanowire and preparation method thereof | |
| CN111672528A (en) | Modified carbon nitride photocatalyst and preparation method and application thereof | |
| CN111841525B (en) | Graphene oxide-based photocatalyst with visible light response and preparation method thereof | |
| CN108940348B (en) | Silver chromate/sulfur-doped nitrogen carbon Z-type photocatalyst and preparation method thereof | |
| CN111604066A (en) | Graphene modified Er doped CeO2Photocatalytic degradation material of BiOBr heterojunction | |
| CN108745405B (en) | Carbon nitride/nitrogen doped hollow mesoporous carbon/bismuth trioxide ternary Z-shaped photocatalyst and preparation method thereof | |
| CN111905712A (en) | Nano-rod-shaped aluminum/bismuth vanadate composite photocatalyst and preparation method thereof | |
| CN112973741B (en) | Preparation method of Z-form bismuth-based photocatalyst | |
| CN114671457A (en) | Method for modifying surface of indium zinc sulfide by chloride ion modification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |