CN110479238B - Multifunctional material and preparation method thereof - Google Patents
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- 239000007777 multifunctional material Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 42
- 239000000725 suspension Substances 0.000 claims abstract description 23
- 235000015110 jellies Nutrition 0.000 claims abstract description 20
- 239000008274 jelly Substances 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000002243 precursor Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000003513 alkali Substances 0.000 claims abstract description 17
- 239000008367 deionised water Substances 0.000 claims abstract description 17
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 6
- 239000011941 photocatalyst Substances 0.000 claims description 5
- 230000001699 photocatalysis Effects 0.000 abstract description 17
- 239000000843 powder Substances 0.000 abstract description 9
- 239000007787 solid Substances 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 description 11
- 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 description 9
- 229940043267 rhodamine b Drugs 0.000 description 9
- 239000011521 glass Substances 0.000 description 6
- 238000004020 luminiscence type Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 238000002835 absorbance Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001938 gadolinium oxide Inorganic materials 0.000 description 2
- 229940075613 gadolinium oxide Drugs 0.000 description 2
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910001451 bismuth ion Inorganic materials 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002189 fluorescence spectrum Methods 0.000 description 1
- -1 gadolinium ions Chemical class 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001179 sorption measurement Methods 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
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- 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
- B01J23/18—Arsenic, antimony or bismuth
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
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Abstract
The invention discloses a multifunctional material and a preparation method thereof, wherein the chemical formula of the multifunctional material is (Gd)1‑xBix)2O3Wherein x = 0.02-0.7, the crystal system is a regular hexagonal system, the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance, and the specific preparation method is as follows: gd (Gd)2O3And Bi2O3Adding concentrated nitric acid and deionized water into the mixed solid powder, heating and stirring to obtain a colorless transparent solution, and cooling to room temperature; adding an alkali solution into the transparent solution, and stirring to obtain a milky white suspension; washing the milky white suspension, and filtering to obtain white jelly; drying the white jelly and then grinding to obtain a precursor material; calcining the precursor material, and cooling along with the furnace temperature to obtain a multifunctional material; the multifunctional material has excellent photocatalytic property and blue light-emitting fluorescence property, and is simple in preparation method and high in yield.
Description
Technical Field
The invention relates to a multifunctional material and a preparation method thereof, belonging to the fields of chemical catalysis and luminescent materials.
Technical Field
In recent years, photocatalytic degradation of harmful pollutants by semiconductor materials has been one of the more popular research subjects, and attention has been paid to the photocatalytic degradation of harmful pollutants because of the efficient use of solar energy and the generation of holes and hydroxyl radicals having strong oxidizing ability in the reaction. At present, TiO with high catalytic activity and good stability is mostly used2However, because of its wide band gap (3.2 eV), it can only absorb the ultraviolet light with the wavelength of lambda less than or equal to 387 nm. Therefore, the development of a novel photocatalyst or the improvement of catalytic efficiency is still an important research topic. Among the novel photocatalysts, Bi-based visible light photocatalysts are receiving increasing attention due to their high visible light catalytic activity. Bi2O3As a semiconductor functional material, the material is widely applied to the fields of catalysis, photoelectric devices, medicines and the like. The research shows that Bi2O3Can be used as photocatalyst for catalyzing and degrading various environmental pollutants.
Meanwhile, the rare earth in China is the top in the world in terms of content, variety, reserve and yield. The rare earth luminescent material has narrow luminescent band, high color purity and bright color; the light absorption capacity is strong, and the conversion efficiency is high; the emission wavelength distribution area is wide; the fluorescence lifetime reaches 6 orders of magnitude from nanosecond to millisecond; stable physical and chemical properties, high temperature resistance and toleranceHigh power electron beam, high energy radiation and strong ultraviolet light. Due to these excellent properties, rare earth luminescent materials are widely used in electric light source lighting, television color development materials, agricultural conversion materials, X-ray fluorescent powders, luminescent coatings, luminescent inks, and the like. And Gd2O3The matrix material is simple to obtain, has stable physical and chemical properties and is easy to dope with other ions, so that Gd (Gd) is prepared2O3Is a satisfactory matrix material. However, the existing research does not develop a multifunctional material which has both photocatalytic performance and blue light-emitting fluorescence performance.
Disclosure of Invention
The invention aims to provide a multifunctional material with a chemical formula of (Gd)1-xBix)2O3Wherein x = 0.02-0.7, the crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance.
The invention also provides a preparation method of the multifunctional material, which comprises the following specific steps:
(1) according to (Gd)1-xBix)2O3The chemical metering ratio of (A) is that 10-20 g of Gd with the total mass is accurately weighed2O3And Bi2O3Putting the mixed solid powder in a beaker, wherein x = 0.02-0.7, adding 25-50 mL of 68% concentrated nitric acid and 20-60 mL of deionized water, heating and stirring at 90-100 ℃ for 5-10 min to obtain a colorless transparent solution, and cooling to room temperature;
(2) adding 100-200 mL of alkali solution into the transparent solution obtained in the step (1), and stirring for 5-10 min to obtain a solution with Gd (OH) as a main component3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2), filtering and collecting to obtain white jelly;
(4) putting the white jelly obtained in the step (3) into a drying oven for drying, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 800-1000 ℃ for 2h, wherein the atmosphere is air, and cooling along with the temperature of the furnace to obtain the multifunctional material.
The alkali solution in the step (2) is a LiOH solution, a KOH solution, a NaOH solution and the like with the mass percentage concentration of 20-30%.
And (3) specifically, washing the milky white suspension for three times by using deionized water, washing the milky white suspension for one time by using absolute ethyl alcohol, filtering the milky white suspension by using a filter, and collecting the milky white suspension to obtain a white jelly.
The drying in the step (4) is drying for 24-28 h at the temperature of 60-80 ℃.
The invention has the beneficial effects that:
the invention uses rare earth element special 4f electron layer to prepare (Gd, Bi) using rare earth oxide-gadolinium oxide as matrix2O3Multifunctional materials to improve pure Bi2O3The photocatalytic performance of (a). The photoluminescence color and the photocatalysis performance are different according to different proportions of gadolinium oxide and bismuth oxide, and along with Bi3+The increase of the concentration makes the color of the photoluminescence blue light deepen, and when the molar ratio of gadolinium ions to bismuth ions is 1:1, the photocatalysis performance is best.
The preparation method is simple and has high yield.
Drawings
FIG. 1 is a diagram illustrating the detection results of photocatalytic activity of the multifunctional materials prepared in examples 1 to 3 of the present invention;
FIG. 2 shows fluorescence emission spectra (. lamda.) of the multifunctional materials prepared in examples 3 to 6Ex=368nm）；
FIG. 3 is a fluorescence chromaticity diagram of the multifunctional material prepared in examples 3 to 6.
Detailed Description
The technical solution of the present invention is clearly and completely described below with reference to the embodiments of the present invention, but the scope of the present invention is not limited to the contents.
Example 1
A multifunctional material has a chemical formula of (Gd)0.5Bi0.5)2O3The crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performanceAnd fluorescence properties of blue light.
The preparation method of the multifunctional material comprises the following steps:
(1) according to (Gd)0.5Bi0.05)2O3Accurately weighing Gd in a total mass of 10g2O3And Bi2O3Adding 25mL of 68% concentrated nitric acid and 20mL of deionized water into the mixed solid powder in a beaker, heating and stirring the mixture at 90 ℃ for 10min to obtain a colorless transparent solution, and cooling the solution to room temperature;
(2) adding 100mL of alkali solution into the transparent solution obtained in the step (1), wherein the alkali solution is a LiOH solution with the mass percentage concentration of 20%, and stirring for 5min by using a glass rod to obtain a solution with the main component of Gd (OH)3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2) with deionized water for three times, then washing with absolute ethyl alcohol for one time, and filtering and collecting with a filter to obtain white jelly;
(4) drying the white jelly obtained in the step (3) in a drying oven at 80 ℃ for 24h, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 800 ℃ for 2h, wherein the atmosphere is air, and cooling along with the furnace temperature to obtain the multifunctional material.
And carrying out SEM electron microscope detection on the obtained material to obtain the material with the particle size of 0.1-3 microns.
Example 2
A multifunctional material has a chemical formula of (Gd)0.3Bi0.7)2O3The crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance.
The preparation method of the multifunctional material comprises the following steps:
(1) according to (Gd)0.3Bi0.7)2O3Accurately weighing Gd of a total mass of 20g2O3And Bi2O3Mixed solid powder of (2)Adding 50mL of 68% concentrated nitric acid and 60mL of deionized water into a beaker, heating and stirring at 95 ℃ for 10min to obtain a colorless transparent solution, and cooling to room temperature;
(2) adding 200mL of an alkali solution into the transparent solution obtained in the step (1), wherein the alkali solution is a NaOH solution with the mass percentage concentration of 25%, and stirring the solution for 10min by using a glass rod to obtain a solution with the main component of Gd (OH)3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2) with deionized water for three times, then washing with absolute ethyl alcohol for one time, and filtering and collecting with a filter to obtain white jelly;
(4) drying the white jelly obtained in the step (3) in a drying oven at 60 ℃ for 28h, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 1000 ℃ for 2h, wherein the atmosphere is air, and cooling along with the temperature of the furnace to obtain the multifunctional material.
And carrying out SEM electron microscope detection on the obtained material to obtain the material with the particle size of 0.1-3 microns.
Example 3
A multifunctional material has a chemical formula of (Gd)0.98Bi0.02)2O3The crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance.
The preparation method of the multifunctional material comprises the following steps:
(1) according to (Gd)0.98Bi0.02)2O3Accurately weighing 15g of Gd in total mass2O3And Bi2O3Adding 35mL of 68% concentrated nitric acid and 40mL of deionized water into the mixed solid powder in a beaker, heating and stirring the mixture for 8min at 100 ℃ to obtain a colorless transparent solution, and cooling the solution to room temperature;
(2) adding 150mL of alkali solution into the transparent solution obtained in the step (1), wherein the alkali solution is a KOH solution with the mass percentage concentration of 30%, and stirring for 8min by using a glass rod to obtain a solution with the main component of Gd (OH)3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2) with deionized water for three times, then washing with absolute ethyl alcohol for one time, and filtering and collecting with a filter to obtain white jelly;
(4) putting the white jelly obtained in the step (3) into a drying oven at 70 ℃ for drying for 25h, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 900 ℃ for 2h, wherein the atmosphere is air, and cooling along with the furnace temperature to obtain the multifunctional material.
And carrying out SEM electron microscope detection on the obtained material to obtain the material with the particle size of 0.1-3 microns.
Example 4
A multifunctional material has a chemical formula of (Gd)0.97Bi0.03)2O3The crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance.
The preparation method of the multifunctional material comprises the following steps:
(1) according to (Gd)0.97Bi0.03)2O3Accurately weighing 18g of Gd in total mass2O3And Bi2O3Adding 45mL of 68% concentrated nitric acid and 50mL of deionized water into the mixed solid powder in a beaker, heating and stirring the mixture at 95 ℃ for 6min to obtain a colorless transparent solution, and cooling the solution to room temperature;
(2) adding 180mL of alkali solution into the transparent solution obtained in the step (1), wherein the alkali solution is a KOH solution with the mass percentage concentration of 30%, and stirring for 8min by using a glass rod to obtain a solution with the main component of Gd (OH)3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2) with deionized water for three times, then washing with absolute ethyl alcohol for one time, and filtering and collecting with a filter to obtain white jelly;
(4) drying the white jelly obtained in the step (3) in a drying oven at 60 ℃ for 28h, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 950 ℃ for 2h, wherein the atmosphere is air, and cooling along with the temperature of the furnace to obtain the multifunctional material.
And carrying out SEM electron microscope detection on the obtained material to obtain the material with the particle size of 0.1-3 microns.
Example 5
A multifunctional material has a chemical formula of (Gd)0.96Bi0.04)2O3The crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance.
The preparation method of the multifunctional material comprises the following steps:
(1) according to (Gd)0.96Bi0.04)2O3Accurately weighing 13g of Gd in total mass2O3And Bi2O3Adding 30mL of 68% concentrated nitric acid and 30mL of deionized water into the mixed solid powder in a beaker, heating and stirring the mixture at the temperature of 98 ℃ for 6min to obtain a colorless transparent solution, and cooling the solution to room temperature;
(2) adding 130mL of alkali solution into the transparent solution obtained in the step (1), wherein the alkali solution is a KOH solution with the mass percentage concentration of 30%, and stirring for 8min by using a glass rod to obtain a solution with the main component of Gd (OH)3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2) with deionized water for three times, then washing with absolute ethyl alcohol for one time, and filtering and collecting with a filter to obtain white jelly;
(4) drying the white jelly obtained in the step (3) in a drying oven at 65 ℃ for 28h, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 930 ℃ for 2h, wherein the atmosphere is air, and cooling along with the temperature of the furnace to obtain the multifunctional material.
And carrying out SEM electron microscope detection on the obtained material to obtain the material with the particle size of 0.1-3 microns.
Example 6
A multifunctional material has a chemical formula of (Gd)0.95Bi0.05)2O3The crystal system is a regular hexagonal system, and the multifunctional material has photocatalytic performance and blue light-emitting fluorescence performance.
The preparation method of the multifunctional material comprises the following steps:
(1) according to (Gd)0.95Bi0.05)2O3Accurately weighing 16g of Gd in total mass2O3And Bi2O3Adding 35mL of 68% concentrated nitric acid and 35mL of deionized water into the mixed solid powder in a beaker, heating and stirring the mixture at 95 ℃ for 6min to obtain a colorless transparent solution, and cooling the solution to room temperature;
(2) adding 150mL of alkali solution into the transparent solution obtained in the step (1), wherein the alkali solution is a KOH solution with the mass percentage concentration of 30%, and stirring for 7min by using a glass rod to obtain a solution with the main component of Gd (OH)3、Bi(OH)3The milky white suspension;
(3) washing the milky white suspension prepared in the step (2) with deionized water for three times, then washing with absolute ethyl alcohol for one time, and filtering and collecting with a filter to obtain white jelly;
(4) putting the white jelly obtained in the step (3) into a drying oven at 70 ℃ for drying for 26h, and then grinding to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) in a muffle furnace at 950 ℃ for 2h, wherein the atmosphere is air, and cooling along with the temperature of the furnace to obtain the multifunctional material.
And carrying out SEM electron microscope detection on the obtained material to obtain the material with the particle size of 0.1-3 microns.
The multifunctional materials prepared in the embodiments 1, 2 and 3 are selected to be subjected to photocatalytic activity detection, and the specific detection method of the photocatalytic activity is as follows: A500W xenon lamp is used as a light source, a filter is used as an auxiliary material, rhodamine B (RhB) is used as a model pollutant, a certain amount of rhodamine B is added into a reactor, and 30mg of the rhodamine B prepared in the embodiment 1, the embodiment 2 and the embodiment 3 is added into the reactor respectivelyThe functional material starts to be illuminated after the dark reaction adsorption reaches the balance, samples are taken at certain time intervals in the illumination process, and the absorbance in the samples is measured by an ultraviolet spectrophotometer, so that the concentration of the rhodamine B in the samples is represented, and the degradation rate is calculated, wherein the calculation method is that the absorbance in different time periods and the absorbance at 0min are taken as the ratio, so that the concentration of the rhodamine B in the solution is reflected along with the increase of the illumination time, and the concentration of the rhodamine B is 5 mg/L; the wavelength range of the absorbance is 300-800 nm, the detection results are shown in figure 1, and example 1, example 2, example 3 and pure Bi2O3The concentration of rhodamine B is reduced compared with that of pure Bi2O3The photocatalytic performance of the multifunctional material obtained in example 1 was the best, and the concentration of rhodamine B at 60min was 36.19%, which tended to decrease.
The multifunctional materials prepared in the embodiments 3, 4, 5 and 6 are selected for luminescence property detection, and the specific detection method comprises the following steps: the emission spectrum is detected by a fluorescence spectrometer with the model number of FLS980, the excitation wavelength is 368nm, the emission light intensity is used as the ordinate, the emission light wavelength is used as the abscissa, the fluorescence intensity at different emission wavelengths is reflected, the data of the wavelengths and the luminescence intensity are led into software CIE1931xy.V.1.6.0.2, the luminescence color of the multifunctional material can be obtained, the detection result is shown in FIG. 2, and the multifunctional material prepared in the embodiments 3-6 has the luminescence property, when x =0.04 in the embodiment 5, the luminescence intensity of the multifunctional material is the maximum, and other proportions can cause that the luminescence intensity is not high but can still emit light due to fluorescence quenching or doping due to factors such as concentration, reaction temperature and the like. The color chart of FIG. 3 shows that the multifunctional materials prepared in examples 3-6 all emit blue light, which is associated with Bi3+The increase in the concentration tends to deepen the blue color of the emission color of the phosphor.
Claims (4)
1. The application of multifunctional material as photocatalyst and blue light emitting fluorescent material has the chemical formula of (Gd)1-xBix)2O3Wherein x = 0.02-0.7, the crystal system is a hexagonal system, multifunctional materialThe preparation method of the material comprises the following steps:
(1) according to (Gd)1-xBix)2O3The chemical metering ratio of (A) is that 10-20 g of Gd with the total mass is accurately weighed2O3And Bi2O3Adding 25-50 mL of 68% concentrated nitric acid and 20-60 mL of deionized water, heating and stirring at 90-100 ℃ for 5-10 min to obtain a colorless transparent solution, and cooling to room temperature;
(2) adding 100-200 mL of alkali solution into the transparent solution obtained in the step (1), and stirring for 5-10 min to obtain milky white suspension;
(3) washing the milky white suspension prepared in the step (2), filtering and collecting to obtain white jelly;
(4) drying and grinding the white jelly obtained in the step (3) to obtain a precursor material;
(5) and (4) calcining the precursor material in the step (4) at 800-1000 ℃ for 2h, and cooling along with the furnace temperature to obtain the multifunctional material.
2. The application of claim 1, wherein the alkali solution in the step (2) is a LiOH solution, a KOH solution or a NaOH solution with a mass percent concentration of 20% -30%.
3. The application of claim 1, wherein the specific operation of step (3) is to wash the milky white suspension with deionized water three times, wash it with absolute ethanol once again, filter and collect a white jelly.
4. The use of claim 1, wherein the drying in step (4) is performed at 60-80 ℃ for 24-28 h.
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