CN113893847B - Preparation method of cerium ion doped bismuth gadolinium oxide photocatalytic material - Google Patents
Preparation method of cerium ion doped bismuth gadolinium oxide photocatalytic material Download PDFInfo
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 26
- 229910052684 Cerium Inorganic materials 0.000 title claims abstract description 17
- LZGKGNAZBPSFKM-UHFFFAOYSA-N bismuth gadolinium(3+) oxygen(2-) Chemical compound [O-2].[Gd+3].[Bi+3].[O-2].[O-2] LZGKGNAZBPSFKM-UHFFFAOYSA-N 0.000 title claims abstract description 17
- -1 cerium ion Chemical class 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000002244 precipitate Substances 0.000 claims abstract description 16
- 239000002243 precursor Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 11
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 7
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000008367 deionised water Substances 0.000 claims abstract description 5
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 5
- 239000012153 distilled water Substances 0.000 claims abstract description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 2
- 238000000975 co-precipitation Methods 0.000 abstract description 8
- 238000007146 photocatalysis Methods 0.000 abstract description 7
- 239000013078 crystal Substances 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract description 3
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 19
- 229960000907 methylthioninium chloride Drugs 0.000 description 19
- 239000003054 catalyst Substances 0.000 description 7
- 238000002835 absorbance Methods 0.000 description 6
- 229910052724 xenon Inorganic materials 0.000 description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 229910002492 Ce(NO3)3·6H2O Inorganic materials 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- XXHRVGVASCXZLC-UHFFFAOYSA-N bismuth gadolinium Chemical compound [Gd].[Bi] XXHRVGVASCXZLC-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001443 photoexcitation Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
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- 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
- 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
-
- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- 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
- B01J23/18—Arsenic, antimony or bismuth
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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Abstract
The invention discloses a preparation method of cerium ion doped bismuth gadolinium oxide photocatalytic material, which comprises the steps of preparing rare earth solution, preparing precursor, drying and calcining. According to Ce x B i(1‑x) GdO 3 Stoichiometric ratio of Bi 2 O 3 And Gd 2 O 3 Dissolving in concentrated nitric acid, dissolving Ce (NO) 3 ) 3 ·6H 2 O is dissolved in a small amount of distilled water, the three solutions are mixed, and sodium dodecyl benzene sulfonate is added to prepare transparent rare earth solution; regulating the pH value of the solution with ammonia water as mineralizer under the condition of continuous stirring to generate milky flocculent precipitate, aging the solution with the precipitate at room temperature for 3 hours, filtering the precipitate, washing the precipitate with deionized water and absolute ethyl alcohol for 3 times respectively, and drying to obtain precursor powder; calcining at a certain temperature for a certain time to obtain Ce x B i(1‑x) GdO 3 And (3) powder. The invention provides a method for preparing Ce by coprecipitation x B i(1‑x) GdO 3 The method of the powder material has simple process and the prepared Ce x B i(1‑x) GdO 3 The powder has the advantages of high purity, uniform crystal size, high photocatalytic property and the like, and has wide application prospect in the field of photocatalysis.
Description
Technical Field
The invention relates to the technical field of preparation of photocatalytic materials, in particular to cerium ion doped bismuth gadolinium oxide (Ce) x Bi (1-x) GdO 3 ) A preparation method of a photocatalysis material.
Background
Photocatalysis is considered to be an efficient technique for purifying and treating polluted water and air, but the traditional photocatalysis material TiO 2 Can only absorb ultraviolet light, and has low utilization efficiency of visible light. Gd-Bi composite oxide with perovskite structure responds to visible light irradiation, gd occupies a 4d orbit in the ground state, and photoexcitation can lead to 6s of Bi in the composite oxide 2 The lone pair electrons of the gadolinium acid are transferred to the d orbit of the gadolinium acid, so that the bismuth gadolinium acid becomes an excellent visible light catalyst.
Studies have shown that Gd can be utilized 2 O 3 And Bi (Bi) 2 O 3 Is calcined at high temperature to obtain BiGdO 3 A material. Although the method is simple and easy to implement, the problems of uneven component distribution, easy formation of defects of fired crystals and the like are easily caused. The powder prepared by the liquid phase method has the advantages of small particle size, good dispersibility, uniform microstructure and the like, and becomes a research hot spot. The liquid phase method is generally classified into a coprecipitation method, a hydrothermal method, a sol-gel method and the like, but the method for preparing BiGdO by the coprecipitation method is not utilized at present 3 Is described in the literature. In addition, ce 3+ Doping can be performed on BiGdO 3 Introducing defects into the crystal lattice or changing the ionic valence state thereof, reducing the photogenerated current carryingThe recombination probability of the electrons and the localized electron states are generated, the energy level of the corresponding electron states is introduced into the forbidden band, the light absorption range of the material is expanded, the photocatalysis efficiency of the material is increased, and the material has great economic value.
Therefore, how to provide a method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material by a coprecipitation method is a problem to be solved by the skilled person.
Disclosure of Invention
In view of the above, the invention provides a method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material by a coprecipitation method. The method has simple process and the prepared Ce x Bi (1-x) GdO 3 The powder has the advantages of high purity, uniform crystal size, high photocatalytic property and the like, and has wide application prospect in the field of photocatalysis.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the preparation method of the cerium ion doped bismuth gadolinium oxide photocatalytic material comprises the following steps:
(1) According to Ce x Bi (1-x) GdO 3 Stoichiometric ratio of Bi 2 O 3 And Gd 2 O 3 Dissolving in concentrated nitric acid, dissolving Ce (NO) 3 ) 3 · 6 H 2 O is dissolved in a small amount of distilled water, the three solutions are mixed, and sodium dodecyl benzene sulfonate is added as a dispersing agent to obtain a transparent rare earth solution;
(2) Under the condition of continuously stirring, ammonia water is used as mineralizer, the pH value of the rare earth solution in the step (1) is regulated to generate milky flocculent precipitate, the solution with the precipitate is aged for 3 hours at room temperature, the precipitate is filtered, deionized water and absolute ethyl alcohol are alternately washed for 3 times, and precursor powder is obtained after drying;
(3) Calcining the precursor powder obtained in the step (2) to obtain Ce x Bi (1-x) GdO 3 Photocatalytic powder material.
Preferably, ce as described in step (1) x Bi (1-x) GdO 3 X=0.01-0.10.
Preferably, in the rare earth solution of step (1)Molar ratio (Ce) 3+ +Bi 3+ ):Gd 3+ ＝1:1。
Preferably, the concentration of the concentrated nitric acid in the step (1) is more than or equal to 2mol/L.
Preferably, the dispersing agent in the step (1) is sodium dodecyl benzene sulfonate, and the adding amount is 2% of the molar concentration of cations in the solution.
Preferably, the mineralizer in the step (2) is ammonia water, and the pH value of the solution is adjusted to 7-12.
Preferably, the drying temperature in the step (2) is 80-200 ℃ and the drying time is 2-24h.
Preferably, the calcination temperature of the precursor powder in the step (3) is 500-1500 ℃, and the heat preservation time is 3-18h.
Compared with the prior art, the invention discloses a preparation method of cerium ion doped bismuth gadolinium oxide photocatalytic material, which has the following beneficial effects:
the invention adopts the coprecipitation method, has simple process method and short preparation period, and is suitable for industrialized mass production. Prepared Ce x Bi (1-x) GdO 3 The powder has the advantages of high purity, uniform crystal size, high photocatalytic property and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 shows the preparation of Ce according to example 1 0.02 Bi 0.98 GdO 3 XRD pattern of the sample;
FIG. 2 is a schematic diagram of example 2 for Ce preparation 0.04 Bi 0.96 GdO 3 XRD pattern of the sample;
FIG. 3 is Ce x Bi (1-x) GdO 3 Photocatalytic efficiency profile of samples (x=0%, 2%, 4%) versus MB.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The method for preparing the cerium ion doped bismuth gadolinium oxide photocatalytic material by the coprecipitation method comprises the following steps:
(1) According to Ce 0.02 B i0.98 GdO 3 Stoichiometric ratio of Bi 2 O 3 、Gd 2 O 3 HNO dissolved in 6mol/L 3 In the method, ce (NO 3 ) 3 ·6H 2 O is dissolved in a small amount of distilled water according to the stoichiometric ratio, and the three solutions are mixed to obtain a transparent rare earth solution;
(2) Weighing Sodium Dodecyl Benzene Sulfonate (SDBS) serving as a dispersing agent with the cation concentration of 2%, adding the sodium dodecyl benzene sulfonate into a transparent rare earth solution, and continuously stirring for 10min;
(3) Ammonia water is used as mineralizer under the condition of continuous stirring, the pH value of the solution is regulated to 9, and a large amount of milky flocculent precipitate is generated in the solution;
(4) Aging the solution with the precipitate at room temperature for 3 hours, filtering the precipitate, and then washing with deionized water and absolute ethyl alcohol for 3 times respectively to remove redundant impurity ions;
(5) Placing the cleaned precursor into a drying oven, drying at 80 ℃ for 12 hours, and grinding into powder;
(6) Calcining the dried precursor at different temperatures of 800 ℃ for a certain time for 8 hours, and cooling the precursor with a furnace to obtain Ce 0.02 Bi 0.98 GdO 3 And (3) a sample.
Analysis of the sample by Japanese science (Rigaku) D/MAX-RB type X-ray diffractometer revealed that the characteristic peak of the product and BiGdO 3 Standard card JCPDS-04-009-5543 completely coincides with no foreign matterPeak, illustrating small amount of Ce doped vs BiGdO 3 The structure has no effect, as shown in figure 1.
CEL-S500/350 xenon lamp light source is selected to simulate visible light, methylene Blue (MB) solution is used as simulated pollutant, and self-made Ce is prepared 0.02 Bi 0.98 GdO 3 The catalyst was tested for photocatalytic performance. 300mL of MB with the concentration of 10mg/L and 0.1g of self-made catalyst are taken, mixed and then treated in a dark place for 50min, so that the self-made catalyst powder achieves adsorption balance on MB solution. Taking a xenon lamp as a light source, performing photocatalysis experiments in a stirring state, and sampling every 30min for 240min; the absorbance of MB was detected by means of an ultraviolet-visible spectrophotometer at a wavelength of 665 nm.
Calculation of photocatalytic efficiency according to the formula: η= (C 0 -C t )/C 0 ×100％＝(A 0 -A t )/A 0 The calculation was performed by x 100%. Wherein eta: photocatalytic efficiency (%), C 0 : initial concentration of MB (mg/L); c (C) t : the concentration of MB at time t (mg/L); a is that 0 : initial absorbance of MB solution; a is that t : absorbance of MB solution at time t. The photocatalytic efficiency is shown in fig. 3.
Example 2
The method for preparing the cerium ion doped bismuth gadolinium oxide photocatalytic material by the coprecipitation method comprises the following steps:
(1) According to Ce 0.04 B i0.96 GdO 3 Stoichiometric ratio of Bi 2 O 3 、Gd 2 O 3 HNO dissolved in 6mol/L 3 In the method, ce (NO 3 ) 3 ·6H 2 O is dissolved in a small amount of distilled water according to the stoichiometric ratio, and the three solutions are mixed to obtain a transparent rare earth solution;
(2) Weighing Sodium Dodecyl Benzene Sulfonate (SDBS) serving as a dispersing agent with the cation concentration of 2%, adding the sodium dodecyl benzene sulfonate into a transparent rare earth solution, and continuously stirring for 10min;
(3) Ammonia water is used as mineralizer under the condition of continuous stirring, the pH value of the solution is regulated to 10, and a large amount of milky flocculent precipitate is generated in the solution;
(4) Aging the solution with the precipitate at room temperature for 3 hours, filtering the precipitate, and then washing with deionized water and absolute ethyl alcohol for 3 times respectively to remove redundant impurity ions;
(5) Placing the cleaned precursor into a drying oven, drying at 100 ℃ for 6 hours, and grinding into powder;
(6) Calcining the dried precursor at 700 ℃ for 10 hours, and then cooling with a furnace to obtain Ce 0.04 Bi 0.96 GdO 3 And (3) a sample.
Analysis of the sample by Japanese science (Rigaku) D/MAX-RB type X-ray diffractometer revealed that the characteristic peak of the product and BiGdO 3 Standard card JCPDS-04-009-5543 completely coincides, which shows that a small amount of Ce is doped to BiGdO 3 The structure has no effect as shown in fig. 2.
The CEL-S500/350 xenon lamp light source is selected to simulate visible light, a Methylene Blue (MB) solution is used as a simulated pollutant, and the self-made catalyst is subjected to photocatalytic performance test. 300mL of MB with the concentration of 10mg/L and 0.1g of self-made catalyst are taken, mixed and then treated in a dark place for 50min, so that the self-made catalyst powder achieves adsorption balance on MB solution. The photocatalytic experiment was performed with a xenon lamp as a light source in a stirred state, samples were taken every 30 minutes, and the absorbance of MB was detected at a wavelength of 665nm using an ultraviolet-visible spectrophotometer.
Calculation of photocatalytic efficiency according to the formula:
η＝(C 0 -C t )/C 0 ×100％＝(A 0 -A t )/A 0 ×100％
wherein C is 0 : initial concentration of MB (mg/L); c (C) t : the concentration of MB at time t (mg/L); a is that 0 : initial absorbance of MB solution; a is that t : absorbance of MB solution at time t. The photocatalytic efficiency is shown in fig. 3.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The preparation method of the cerium ion doped bismuth gadolinium oxide photocatalytic material is characterized by comprising the following steps of: (1) According to Ce x Bi (1-x) GdO 3 Stoichiometric ratio of Bi 2 O 3 And Gd 2 O 3 Dissolving in concentrated nitric acid, dissolving Ce (NO) 3 ) 3 ·6H 2 O is dissolved in distilled water, the three solutions are mixed, and a dispersing agent is added to obtain a transparent rare earth solution; the Ce x Bi (1-x) GdO 3 X=0.01-0.10;
(2) Under the condition of continuously stirring, ammonia water is used as mineralizer, the pH value of the rare earth solution in the step (1) is regulated to generate milky flocculent precipitate, the solution with the precipitate is aged for 3 hours at room temperature, the precipitate is filtered, deionized water and absolute ethyl alcohol are alternately washed for 3 times, and precursor powder is obtained after drying;
(3) Calcining the precursor powder obtained in the step (2) to obtain Ce x Bi (1-x) GdO 3 Photocatalytic powder material.
2. The method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material according to claim 1, wherein the molar ratio (Ce 3+ +Bi 3+ ):Gd 3+ ＝1:1。
3. The preparation method of the cerium ion doped bismuth gadolinium oxide photocatalytic material according to claim 1, wherein the concentration of the concentrated nitric acid in the step (1) is more than or equal to 2mol/L.
4. The method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material according to claim 1, wherein the dispersant in the step (1) is sodium dodecyl benzene sulfonate, and the addition amount is 2% of the molar concentration of cations in the solution.
5. The method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material according to claim 1, wherein the mineralizer in the step (2) is ammonia water, and the pH of the solution is adjusted to 7-12.
6. The method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material according to claim 1, wherein the drying temperature in the step (2) is 80-200 ℃ and the drying time is 2-24 hours.
7. The method for preparing cerium ion doped bismuth gadolinium oxide photocatalytic material according to claim 1, wherein the calcination temperature of the precursor powder in the step (3) is 500-1500 ℃, and the heat preservation time is 3-18h.
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