CN112473733B - Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and application thereof - Google Patents

Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and application thereof Download PDF

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CN112473733B
CN112473733B CN202011382376.5A CN202011382376A CN112473733B CN 112473733 B CN112473733 B CN 112473733B CN 202011382376 A CN202011382376 A CN 202011382376A CN 112473733 B CN112473733 B CN 112473733B
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titanium dioxide
doped titanium
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aluminum phosphate
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杨建安
文焱炳
周维
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GUIZHOU RESEARCH INSTITUTE OF CHEMICAL INDUSTRY
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Abstract

The invention discloses a Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst, which takes an aluminum phosphate molecular sieve as a carrier and takes Mo-Eu co-doped titanium dioxide nano microspheres as an active component, and the preparation method comprises the following steps: preparing a nano microsphere active component of the Mo-Eu co-doped titanium dioxide; uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid; adding the Mo-Eu co-doped titanium dioxide nano microsphere active component prepared in the step S1 into the mixed solution in the step S2, wherein the mixture comprises the following substances in parts by mass: ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the Mo-Eu co-doped titanium dioxide nano microsphere active component is 10-12:2-3:1:5-6: 0.5-0.8: 0.3-0.5; crystallizing the mixture at the temperature of 350-400 ℃ for 30-50 min; centrifugal separation, washing, drying and roasting. The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention can efficiently degrade pollutants in printing and dyeing wastewater under the action of visible light, and the usage amount of the catalyst is small.

Description

Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and application thereof
Technical Field
The invention relates to the technical field of catalysts, and particularly relates to a Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and application thereof.
Background
China is the first country of dye production and consumption in the world, and the printing and dyeing wastewater pollution amount is large and the treatment difficulty is high. According to incomplete statistics, the daily wastewater discharge amount of printing and dyeing enterprises in China reaches 300-400 ten thousand tons, the loss amount of dye reaches 10-20 percent in the printing and dyeing processing process, at least half of the dye waste water flows into the environment, the treatment rate of the current dye waste water is less than 30 percent, and the qualification rate is less than 60 percent. Because the printing and dyeing wastewater has the characteristics of high chromaticity, high concentration of organic pollutants (especially refractory organic pollutants), large alkalinity, high water quantity, large water quality change, complex components, high Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD), high toxicity and the like, toxic and harmful substances in the printing and dyeing wastewater also have an accumulation effect in animals and plants and are not easy to discharge, so that the toxicity is increased violently, carcinogenicity is generated, and the living environment of human beings is harmed. Therefore, the printing and dyeing wastewater is directly discharged into rivers and lakes without being treated, and the consequences and the damage of the printing and dyeing wastewater are conceivable. Therefore, the treatment of the printing and dyeing wastewater is enhanced, the problem of water resource shortage in China can be solved, the environmental pollution is reduced, the social hazard is reduced, and the method plays an important role in protecting the human environment, particularly the water environment.
At present, the research on the treatment technology of printing and dyeing wastewater at home and abroad mainly focuses on an adsorption method, a membrane filtration method, a coagulation method, a biological method and an oxidation method. The adsorption method is to utilize an adsorbent to adsorb impurities in the printing and dyeing wastewater to achieve the purposes of decoloring and purifying the wastewater, but the adsorbent has the defects of selective adsorption, difficult regeneration, high operation cost, secondary environmental problem and the like; the membrane filtration is to purify water by using water-insoluble impurities in the membrane filtration water, but the membrane filtration has no effect on soluble pollutants, and has large investment, difficult regeneration and high operation cost; the coagulation method is to utilize a flocculating agent to adsorb, flocculate and settle organic pollutants, separate impurities in a sludge form and purify waste water, but has the defects of changing feeding conditions according to the change of water quality, low processing flexibility, poor hydrophilic pollutant decoloring effect, low COD removal rate, difficult sludge dewatering, field occupation and the like; the biological method mainly utilizes microbial enzymes to degrade organic pollutants, thereby realizing the purpose of sewage purification; the oxidation method comprises an ozone oxidation method, a Fenton reagent oxidation method, a wet oxidation method, a catalytic oxidation method and the like, and is mainly a research hotspot because the oxidation method can completely eliminate the harmful degradation organic pollutants in a short time and does not generate secondary pollution, wherein the ozone method mainly has the defects of high treatment cost, unsuitability for treating large-flow wastewater and the like, the Fenton reagent method mainly has the defects of harsh reaction conditions, high acid consumption, high corrosion possibility of equipment and the like, the wet oxidation method needs to be carried out under the high-temperature and high-pressure conditions, the traditional catalytic oxidation method uses an active mercury lamp of an ultraviolet light excitation catalyst to purify the wastewater, and most of the prior catalytic oxidation methods use an industrial light source, an ultraviolet light excitation catalyst and the like as a light source and have low catalytic efficiency.
In the prior art, TiO2The photocatalyst has the characteristics of stable chemical property, strong oxidation-reduction capability, environmental friendliness and the like, and is widely applied to the field of environmental pollution control as a photocatalyst. However, TiO2High recombination rate of photon-generated carriers, narrow spectral response range and poor adsorption capacity which restrict TiO2The major bottleneck for photocatalyst activity.
In view of the above, the present invention aims to provide a composite catalyst with strong photocatalytic activity to solve the above technical problems.
Disclosure of Invention
The invention aims to overcome the technical defects and provide the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst which can efficiently degrade pollutants in printing and dyeing wastewater under the action of visible light and has small usage amount.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst is characterized in that an aluminum phosphate molecular sieve is taken as a carrier, nanometer microspheres of Mo-Eu co-doped titanium dioxide are taken as active ingredients, and the preparation method comprises the following steps:
step S1, preparing the Mo-Eu co-doped titanium dioxide nano microsphere active component, which comprises the following steps:
step S11, mixing 10-20 parts of tetrabutyl orthotitanate and 20-30 parts of absolute ethyl alcohol to obtain a mixed solution A;
step S12, dissolving 5-8 parts of sodium molybdate in water to obtain a sodium molybdate solution;
step S13, adding a sodium molybdate solution into the mixed solution A, and dropwise adding 2-3 parts of europium sulfate under the ultrasonic stirring condition to obtain a mixed solution B;
step S14, carrying out centrifugal separation on the mixed solution B, and carrying out vacuum drying on the obtained slurry for 2-3h at the temperature of 50-60 ℃;
step S15, calcining the dried material, raising the temperature to 400-500 ℃ at the temperature raising speed of 8-10 ℃/min, and preserving the temperature for 30-40 min; then heating to 800-900 ℃ at the heating rate of 4-6 ℃/min, and preserving the heat for 50-60min to obtain the active component of the Mo-Eu co-doped titanium dioxide nano microsphere;
step S2, uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid;
step S3, adding the Mo-Eu co-doped titanium dioxide nanoparticle active component prepared in step S1 into the mixed solution in step S2, wherein the mass parts of the components in the mixture are as follows:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the Mo-Eu co-doped titanium dioxide nano microsphere active component is 10-12:2-3:1:5-6: 0.5-0.8: 0.3-0.5;
step S4, crystallizing the mixture at the temperature of 350-400 ℃ for 30-50 min;
and step S5, obtaining the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst through centrifugal separation, washing, drying and roasting.
Further, the ionic liquid is 1-butyl-3-methylimidazole chloride.
Further, the organic amine is triethylamine.
Further, in step S3, the mass parts of the substances in the mixture are:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the active components of the Mo-Eu co-doped titanium dioxide nano microsphere are 10:2:1:5: 0.6: 0.4.
further, in step S13, the frequency of ultrasonic agitation is 30-35 Hz.
The invention also provides an application of the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst in printing and dyeing wastewater treatment.
Compared with the prior art, the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention has the beneficial effects that:
according to the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention, the aluminum phosphate molecular sieve is taken as a carrier, so that the particle size of the photocatalyst can be reduced, particle agglomeration is inhibited, a large specific surface area is provided, and the adsorption capacity is enhanced; the Mo-Eu co-doped titanium dioxide nano-microsphere is used as an active component, Mo and Eu doping can block anatase phase-to-rutile phase transformation of titanium dioxide, can obviously inhibit growth of titanium dioxide crystal grains, enables the crystal structure to be regular and the grain size to be uniform under the synergistic inhibition effect of Mo and Eu, and can be well dispersed in an aluminum phosphate molecular sieve structure; meanwhile, Mo can improve the responsiveness of visible light, and Mo and Eu are jointly doped, so that the recombination probability of photon-generated carriers is effectively reduced, the photocatalytic activity is improved, and the catalytic efficiency of the catalyst is improved. The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention has higher treatment efficiency on printing and dyeing wastewater under the irradiation of visible light, the decolorization rate reaches 97%, the COD removal efficiency reaches 95%, and the toluene removal rate reaches 97%.
Detailed Description
The following detailed description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, combinations of values between the endpoints of each of the ranges, between the endpoints of each of the ranges and individual values, and between individual values can result in one or more new numerical ranges, and such numerical ranges should be considered as being specifically disclosed herein.
A Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst takes an aluminum phosphate molecular sieve as a carrier and takes Mo-Eu co-doped titanium dioxide nano microspheres as an active component, and the preparation method comprises the following steps:
step S1, preparing the Mo-Eu co-doped titanium dioxide nano microsphere active component, which comprises the following steps:
step S11, mixing 10-20 parts of tetrabutyl orthotitanate and 20-30 parts of absolute ethyl alcohol to obtain a mixed solution A;
step S12, dissolving 5-8 parts of sodium molybdate in water to obtain a sodium molybdate solution;
step S13, adding the sodium molybdate solution into the mixed solution A, and dropwise adding 2-3 parts of europium sulfate under the condition of ultrasonic stirring to obtain a mixed solution B; wherein the frequency of ultrasonic stirring is 30-35 Hz;
step S14, performing centrifugal separation on the mixed solution B, and performing vacuum drying on the obtained slurry for 2-3h at the temperature of 50-60 ℃;
step S15, calcining the dried material, raising the temperature to 400-500 ℃ at the temperature raising speed of 8-10 ℃/min, and preserving the heat for 30-40 min; then heating to 800-900 ℃ at the heating rate of 4-6 ℃/min, and preserving the heat for 50-60min to obtain the active component of the Mo-Eu co-doped titanium dioxide nano microsphere;
step S2, uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid;
wherein the ionic liquid is 1-butyl-3-methylimidazole chloride; organic amine is used as a template agent, and specifically is triethylamine; the aluminum source is pseudo-boehmite;
step S3, adding the Mo-Eu co-doped titanium dioxide nanoparticle active ingredient prepared in step S1 into the mixed solution in step S2, wherein the mass parts of the materials in the mixture are as follows:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the Mo-Eu co-doped titanium dioxide nano microsphere active components are (wt%) 10-12:2-3:1:5-6: 0.5-0.8: 0.3-0.5;
step S4, crystallizing the mixture at the temperature of 350-400 ℃ for 30-50 min;
step S5, carrying out centrifugal separation, washing, drying and roasting to obtain the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst;
in the step, the drying also adopts vacuum drying, the vacuum drying temperature is 45-50 ℃, the roasting temperature is 280-350 ℃, and the roasting time is 2-3 h.
The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst of the present invention is described in detail by specific examples.
Example 1
A preparation method of the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst comprises the following steps:
step S1, preparing the Mo-Eu co-doped titanium dioxide nano microsphere active component, which comprises the following steps:
step S11, mixing 10 parts of tetrabutyl orthotitanate and 20 parts of absolute ethyl alcohol to obtain a mixed solution A;
step S12, dissolving 5 parts of sodium molybdate in water to obtain a sodium molybdate solution;
step S13, adding a sodium molybdate solution into the mixed solution A, and dropwise adding 2 parts of europium sulfate under the stirring condition to obtain a mixed solution B;
step S14, carrying out centrifugal separation on the mixed solution B, and carrying out vacuum drying on the obtained slurry for 2-3h at 50 ℃;
step S15, calcining the dried material, heating to 400 ℃ at a heating rate of 8-10 ℃/min, and keeping the temperature for 30-40 min; then heating to 800 ℃ at the heating rate of 4-6 ℃/min, and keeping the temperature for 50-60min to obtain the Mo-Eu co-doped titanium dioxide nano microsphere active component;
step S2, uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid;
wherein the ionic liquid is 1-butyl-3-methylimidazole chloride; organic amine is used as a template agent, and specifically is triethylamine; the aluminum source is pseudoboehmite;
step S3, adding the Mo-Eu co-doped titanium dioxide nanoparticle active component prepared in step S1 into the mixed solution in step S2, wherein the mass parts of the components in the mixture are as follows:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the active components of the Mo-Eu co-doped titanium dioxide nano microsphere are as follows (10: 2:1:5: 0.6): 0.4 of the total weight of the mixture;
step S4, crystallizing the mixture at 350 ℃ for 30-50 min;
and step S5, obtaining the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst through centrifugal separation, washing, drying and roasting.
Example 2
A Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst comprises the following steps:
step S1, preparing the Mo-Eu co-doped titanium dioxide nano microsphere active component, which comprises the following steps:
step S11, mixing 20 parts of tetrabutyl orthotitanate and 30 parts of absolute ethyl alcohol to obtain a mixed solution A;
step S12, dissolving 8 parts of sodium molybdate in water to obtain a sodium molybdate solution;
step S13, adding a sodium molybdate solution into the mixed solution A, and dropwise adding 3 parts of europium sulfate under the stirring condition to obtain a mixed solution B;
step S14, carrying out centrifugal separation on the mixed solution B, and carrying out vacuum drying on the obtained slurry for 2-3h at the temperature of 60 ℃;
step S15, calcining the dried material, heating to 450 ℃ at a heating rate of 8-10 ℃/min, and preserving heat for 30-40 min; then heating to 900 ℃ at the heating rate of 4-6 ℃/min, and preserving the heat for 50-60min to obtain the Mo-Eu co-doped titanium dioxide nano microsphere active component;
step S2, uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid;
wherein the ionic liquid is 1-butyl-3-methylimidazole chloride; organic amine is used as a template agent, and specifically is triethylamine; the aluminum source is pseudo-boehmite;
step S3, adding the Mo-Eu co-doped titanium dioxide nanoparticle active ingredient prepared in step S1 into the mixed solution in step S2, wherein the mass parts of the materials in the mixture are as follows:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the active components of the Mo-Eu co-doped titanium dioxide nano microsphere are as follows (12: 4:1:6: 0.5: 0.5;
step S4, crystallizing the mixture at 400 ℃ for 30-50 min;
and step S5, obtaining the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst through centrifugal separation, washing, drying and roasting.
Example 3
A Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst comprises the following steps:
step S1, preparing the Mo-Eu co-doped titanium dioxide nano microsphere active component, which comprises the following steps:
step S11, mixing 15 parts of tetrabutyl orthotitanate and 25 parts of absolute ethyl alcohol to obtain a mixed solution A;
step S12, dissolving 6 parts of sodium molybdate in water to obtain a sodium molybdate solution;
step S13, adding a sodium molybdate solution into the mixed solution A, and dropwise adding 3 parts of europium sulfate under the stirring condition to obtain a mixed solution B;
step S14, carrying out centrifugal separation on the mixed solution B, and carrying out vacuum drying on the obtained slurry for 2-3h at the temperature of 58 ℃;
step S15, calcining the dried material, heating to 450 ℃ at a heating rate of 8-10 ℃/min, and keeping the temperature for 30-40 min; then heating to 860 ℃ at the heating rate of 4-6 ℃/min, and keeping the temperature for 50-60min to obtain the Mo-Eu co-doped titanium dioxide nano microsphere active component;
step S2, uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid;
wherein the ionic liquid is 1-butyl-3-methylimidazole chloride; organic amine is used as a template agent, and specifically is triethylamine; the aluminum source is pseudoboehmite;
step S3, adding the Mo-Eu co-doped titanium dioxide nanoparticle active component prepared in step S1 into the mixed solution in step S2, wherein the mass parts of the components in the mixture are as follows:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the active components of the Mo-Eu co-doped titanium dioxide nano microsphere are 11:2:1:6: 0.8: 0.3;
step S4, crystallizing the mixture at 380 ℃ for 30-50 min;
and step S5, carrying out centrifugal separation, washing, drying and roasting to obtain the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst.
Comparative example 1
Based on the embodiment 1, the molybdenum element doping is eliminated; the other process steps and parameters were the same as in example 1.
Comparative example 2
Based on the embodiment 1, the doping of rare earth europium element is cancelled, and other process steps and parameters are the same as those of the embodiment 1.
Comparative example 3
Based on the embodiment 1, the doping of molybdenum element and rare earth europium element is cancelled, and other process steps and parameters are the same as those of the embodiment 1.
Comparative example 4
Based on the example 1, the ratio of the active components of the Mo-Eu co-doped titanium dioxide nano microsphere is changed, so that the ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the active components of the Mo-Eu co-doped titanium dioxide nano microsphere are as follows (10: 2:1:5: 0.6): 0.8; the other process steps and parameters were the same as in example 1.
The catalysts of examples 1 to 3 and comparative examples 1 to 4 were used for the treatment of printing and dyeing wastewater, and performance tests were conducted. The test method is as follows:
taking printing and dyeing wastewater, wherein the content of methylene blue in the wastewater is 90mg/L, the content of toluene in the wastewater is 24mg/L, and the COD concentration is 1280 mg/L;
the catalysts of the examples 1-3 and the comparative examples 1-4 are respectively put into the same amount of printing and dyeing wastewater, stirred for 90-120min under the irradiation of visible light, and then the purified water quality index is detected, wherein the dosage of the catalyst is 3% of the wastewater. The water quality indexes after purification are as follows:
Figure BDA0002809840800000081
according to the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention, the active component is the nano microsphere particles of Mo-Eu co-doped titanium dioxide, and the Mo and Eu have synergistic effect to improve the catalytic activity of the titanium dioxide, so that the printing and dyeing wastewater purification effect is better;
the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention adopts an ionothermal method to prepare an aluminum phosphate molecular sieve, provides required cations for an inorganic framework structure, and plays a guiding role in the process of combining a carrier and an active component to form an ordered molecular sieve structure; the aluminum phosphate molecular sieve is synthesized by adopting an ionic thermal method, so that hydroxide and amorphous substances can be avoided from being generated, and the catalytic efficiency of the catalyst can be improved.
The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention takes the aluminum phosphate molecular sieve as a carrier, can reduce the particle size of the photocatalyst, inhibit particle agglomeration, provide large specific surface area and enhance adsorption capacity; the Mo-Eu co-doped titanium dioxide nano-microsphere is used as an active component, Mo and Eu doping can block anatase phase-to-rutile phase transformation of titanium dioxide, can obviously inhibit growth of titanium dioxide crystal grains, enables the crystal structure to be regular and the grain size to be uniform under the synergistic inhibition effect of Mo and Eu, and can be well dispersed in an aluminum phosphate molecular sieve structure; meanwhile, Mo can improve the responsiveness of visible light, and under the effect of the co-doping of Mo and Eu, the recombination probability of photon-generated carriers is effectively reduced, the photocatalytic activity under the irradiation of visible light is improved, and the catalytic efficiency of the catalyst is improved. The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst provided by the invention has higher treatment efficiency on printing and dyeing wastewater under the irradiation of visible light, the decolorization rate reaches 97%, the COD removal efficiency reaches 95%, and the toluene removal rate reaches 97%.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.

Claims (4)

1. The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst is characterized in that an aluminum phosphate molecular sieve is taken as a carrier, nanometer microspheres of Mo-Eu co-doped titanium dioxide are taken as active ingredients, and the preparation method comprises the following steps:
step S1, preparing the Mo-Eu co-doped titanium dioxide nano microsphere active component, which comprises the following steps:
step S11, mixing 10-20 parts of tetrabutyl orthotitanate and 20-30 parts of absolute ethyl alcohol to obtain a mixed solution A;
step S12, dissolving 5-8 parts of sodium molybdate in water to obtain a sodium molybdate solution;
step S13, adding a sodium molybdate solution into the mixed solution A, and dropwise adding 2-3 parts of europium sulfate under the ultrasonic stirring condition to obtain a mixed solution B;
step S14, performing centrifugal separation on the mixed solution B, and performing vacuum drying on the obtained slurry for 2-3h at the temperature of 50-60 ℃;
step S15, calcining the dried material, raising the temperature to 400-500 ℃ at the temperature raising speed of 8-10 ℃/min, and preserving the temperature for 30-40 min; then heating to 800-900 ℃ at the heating rate of 4-6 ℃/min, and preserving the heat for 50-60min to obtain the active component of the Mo-Eu co-doped titanium dioxide nano microsphere;
step S2, uniformly mixing the ionic liquid, phosphoric acid, an aluminum source, organic amine and hydrofluoric acid; wherein the ionic liquid is 1-butyl-3-methylimidazole chloride; the organic amine is triethylamine;
step S3, adding the Mo-Eu co-doped titanium dioxide nanoparticle active ingredient prepared in step S1 into the mixed solution in step S2, wherein the mass parts of the materials in the mixture are as follows:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the Mo-Eu co-doped titanium dioxide nano microsphere active component is 10-12:2-3:1:5-6: 0.5-0.8: 0.3-0.5;
step S4, crystallizing the mixture at the temperature of 350-400 ℃ for 30-50 min;
and step S5, carrying out centrifugal separation, washing, drying and roasting to obtain the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst.
2. The Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst of claim 1, wherein in step S3, the mass part ratio of each substance in the mixture is:
ionic liquid: phosphoric acid, aluminum source: organic amine: hydrofluoric acid: the active components of the Mo-Eu co-doped titanium dioxide nano microsphere are as follows (10: 2:1:5: 0.6): 0.4.
3. the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst of claim 1, wherein in step S13, the frequency of ultrasonic stirring is 30-35 Hz.
4. The application of the Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst disclosed by any one of claims 1-3 in treatment of printing and dyeing wastewater.
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Publication number Priority date Publication date Assignee Title
CN113244950A (en) * 2021-05-26 2021-08-13 贵州省化工研究院 Composite carrier photocatalyst and application thereof
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207745A1 (en) * 1992-03-11 1993-09-16 Basf Ag MOLECULAR SCREENS CONTAINING AZO DYES
FR2869897A1 (en) * 2004-05-10 2005-11-11 Saint Gobain PHOTOCATALYTIC COATING SUBSTRATE
CN101952116A (en) * 2007-11-16 2011-01-19 瓦林格光催化股份有限公司 Photocatalytic boards or panels and a method of manufacturing thereof
CN102101681A (en) * 2009-12-16 2011-06-22 中国科学院大连化学物理研究所 Ionothermal synthesis method of microporous aluminum phosphate molecular sieve
CN102872774A (en) * 2011-07-11 2013-01-16 张�林 Titanium dioxide (shell)-dopant (core) composite material and preparation method thereof
CN103801391A (en) * 2014-02-19 2014-05-21 山西大学 Preparation method for titanium-silicon-aluminum phosphate molecular sieve catalyst
CN105142782A (en) * 2013-04-24 2015-12-09 沙特基础工业公司 Catalyst for selective synthesis of lower hydrocarbons from syngas
KR20180065493A (en) * 2016-12-08 2018-06-18 한국과학기술원 Gas sensor and member using metal oxide nanotubes including nanoscale heterogeneous catalysts by using metal-organic framework, and manufacturing method thereof
KR101876938B1 (en) * 2017-09-12 2018-07-10 주식회사 소프스톤 Manufacturing of titanium dioxide and titanium dioxide manufactured therefrom
CN109535305A (en) * 2018-11-26 2019-03-29 贵州省化工研究院 A kind of preparation method of Rhein adsorbent material
CN110801827A (en) * 2019-11-24 2020-02-18 南京公诚节能新材料研究院有限公司 Preparation method of photosensitive degradation catalyst

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160339416A1 (en) * 2010-12-09 2016-11-24 Sk Innovation Co., Ltd. Hydroprocessing catalyst and method for preparing same

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207745A1 (en) * 1992-03-11 1993-09-16 Basf Ag MOLECULAR SCREENS CONTAINING AZO DYES
FR2869897A1 (en) * 2004-05-10 2005-11-11 Saint Gobain PHOTOCATALYTIC COATING SUBSTRATE
CN101952116A (en) * 2007-11-16 2011-01-19 瓦林格光催化股份有限公司 Photocatalytic boards or panels and a method of manufacturing thereof
CN102101681A (en) * 2009-12-16 2011-06-22 中国科学院大连化学物理研究所 Ionothermal synthesis method of microporous aluminum phosphate molecular sieve
CN102872774A (en) * 2011-07-11 2013-01-16 张�林 Titanium dioxide (shell)-dopant (core) composite material and preparation method thereof
CN105142782A (en) * 2013-04-24 2015-12-09 沙特基础工业公司 Catalyst for selective synthesis of lower hydrocarbons from syngas
CN103801391A (en) * 2014-02-19 2014-05-21 山西大学 Preparation method for titanium-silicon-aluminum phosphate molecular sieve catalyst
KR20180065493A (en) * 2016-12-08 2018-06-18 한국과학기술원 Gas sensor and member using metal oxide nanotubes including nanoscale heterogeneous catalysts by using metal-organic framework, and manufacturing method thereof
KR101876938B1 (en) * 2017-09-12 2018-07-10 주식회사 소프스톤 Manufacturing of titanium dioxide and titanium dioxide manufactured therefrom
CN109535305A (en) * 2018-11-26 2019-03-29 贵州省化工研究院 A kind of preparation method of Rhein adsorbent material
CN110801827A (en) * 2019-11-24 2020-02-18 南京公诚节能新材料研究院有限公司 Preparation method of photosensitive degradation catalyst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
镧铕共掺TiO_2/复合白土光催化剂的合成及工业废水处理活性;郭莉等;《应用化工》;20110428(第04期);全文 *

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