CN113171769A - Nano composite photocatalytic material and preparation method thereof - Google Patents
Nano composite photocatalytic material and preparation method thereof Download PDFInfo
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- CN113171769A CN113171769A CN202110516290.5A CN202110516290A CN113171769A CN 113171769 A CN113171769 A CN 113171769A CN 202110516290 A CN202110516290 A CN 202110516290A CN 113171769 A CN113171769 A CN 113171769A
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 title claims abstract description 20
- 239000002114 nanocomposite Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 59
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000004964 aerogel Substances 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 45
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 43
- 239000002121 nanofiber Substances 0.000 claims abstract description 42
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 29
- 239000002105 nanoparticle Substances 0.000 claims abstract description 22
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910002915 BiVO4 Inorganic materials 0.000 claims abstract description 16
- 239000000725 suspension Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 3
- 238000007146 photocatalysis Methods 0.000 abstract description 4
- 239000000969 carrier Substances 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 4
- 239000011941 photocatalyst Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 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 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004847 absorption spectroscopy Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 230000001443 photoexcitation Effects 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 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
- 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
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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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- 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
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
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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
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
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- 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
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- 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
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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Abstract
The invention relates to the field of preparation of photocatalytic materials, and in particular relates to a nano composite photocatalytic material which comprises nano titanium dioxide nanofiber aerogel, a plurality of graphene oxide particles attached to the surface of the titanium dioxide nanofiber aerogel, and BiVO attached to the surfaces of the graphene oxide particles and the surface of the titanium dioxide nanofiber aerogel4And (3) nanoparticles. The titanium dioxide nanofiber aerogel is a titanium dioxide nanofiber aerogel with an ordered cell structureAnd (6) gluing. The invention adopts nano titanium dioxide nano fiber aerogel, graphene oxide particles and BiVO4The compounding of the nano particles can effectively prolong the service life of carriers generated by photocatalysis, prevent the combination of holes and electrons and greatly improve the high catalysis efficiency.
Description
Technical Field
The invention relates to the field of preparation of photocatalytic materials, in particular to a nano composite photocatalytic material and a preparation method thereof.
Background
The increasing environmental problems and energy scarcity have led to a constant focus on the degradation of photocatalytic pollutants and the study of photolytic water. Since most of sunlight is visible light, it is very necessary to develop visible light-driven photocatalysts from the viewpoint of making full use of solar energy.
In recent years, monoclinic phase bismuth vanadate as a visible light catalyst has been extensively and intensively studied by many chemists. BiVO4The forbidden band width of the material is 2.4-2.5 eV, and the material can well utilize visible light to generate electrons and holes so as to participate in photocatalytic reaction. Photo-excitation BiVO4The generated holes have strong oxidizing power and can diffuse from the inside of the solid to the surface rapidly due to the low effective mass of the holes. At present, BiVO4The photocatalyst is applied to sewage purification and photolysis of water to generate oxygen as a visible light photocatalyst. BiVO4The photocatalyst has three advantages of no toxicity, low price and stability, but has self limitations. First BiVO4The adsorption capacity to organic substances is poor, which is comparable to BiVO4The isoelectric point is relatively low; secondly is BiVO4The photo-excited electron-hole pairs are easy to recombine, so that the separation efficiency of carriers is low, and BiVO (BiVO)4The application in the field of photocatalysis is greatly limited.
And TiO 22The catalyst has stable chemical properties, strong light corrosion resistance, difficult dissolution, no toxicity, low cost and environmental protection, and has become a green environment-friendly catalyst with the greatest development prospect. But pure TiO2The photocatalysis efficiency is very low, and the absorption of sunlight is limited to an ultraviolet band, so that the utilization rate of the sunlight on solar energy is greatly influenced, and the practical application value is reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a nano composite photocatalytic material and a preparation method thereof, wherein nano titanium dioxide nano fiber aerogel, graphene oxide particles and BiVO are adopted4The composite of the nano particles greatly improves the photocatalytic performance of the obtained composite photocatalytic material.
In order to achieve the purpose, the invention adopts the technical scheme that:
a nano-composite photocatalytic material comprises nano-titanium dioxide nanofiber aerogel, a plurality of graphene oxide particles attached to the surface of the nano-titanium dioxide fiber aerogel and BiVO attached to the surfaces of the graphene oxide particles and the surface of the nano-titanium dioxide fiber aerogel4And (3) nanoparticles.
Further, the titanium dioxide nanofiber aerogel is a titanium dioxide nanofiber aerogel with an ordered cell structure.
Further, the adjustment of the attachment density of the graphene oxide particles on the surface of the titanium dioxide nanofiber aerogel is realized by adjusting the mass ratio of the graphene oxide particles to the titanium dioxide nanofiber aerogel.
Further, the graphene oxide particles, the titanium dioxide nanofiber aerogel and the BiVO are used4The adjustment of the mass ratio of the nano particles realizes the oxidation of graphene particles and BiVO on the surface of the titanium dioxide nano fiber aerogel4Nanoparticle attachment density and graphene oxide particle surface BiVO4And (4) adjusting the attachment density of the nanoparticles.
The invention also provides a preparation method of the nano composite photocatalytic material, which comprises the following steps:
s1, attaching a plurality of graphene oxide particles to the surface of the nano titanium dioxide nanofiber aerogel;
s2, attaching BiVO on the surfaces of graphene oxide particles and titanium dioxide nanofiber aerogel4And (3) nanoparticles.
Further, the step S1 includes the following steps:
s11, ultrasonically dispersing graphene oxide particles in deionized water to form a graphene oxide particle suspension;
and S12, adding nano titanium dioxide nanofiber aerogel into the graphene oxide particle suspension, sending the mixture into a high-pressure homogenizer for homogenization after complete adsorption, and drying to obtain the graphene oxide particle suspension.
Further, the step S2 includes the following steps:
s21, ultrasonically dispersing the titanium dioxide nanofiber aerogel with the graphene oxide particles attached to the surface in water to obtain a suspension;
s22, mixing BiVO4Adding the nanoparticles into the suspension, ultrasonically dispersing for 6min, vigorously stirring for 30min, washing with deionized water, dispersing in water, performing hydrothermal reaction at 120 deg.C for 15h, washing, and drying.
The invention has the following beneficial effects:
the invention adopts nano titanium dioxide nano fiber aerogel, graphene oxide particles and BiVO4The compounding of the nano particles can effectively prolong the service life of carriers generated by photocatalysis, prevent the combination of holes and electrons and greatly improve the high catalysis efficiency.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A nano-composite photocatalytic material comprises nano-titanium dioxide nanofiber aerogel, a plurality of graphene oxide particles attached to the surface of the nano-titanium dioxide fiber aerogel and BiVO attached to the surfaces of the graphene oxide particles and the surface of the nano-titanium dioxide fiber aerogel4And (3) nanoparticles. The titanium dioxide nanofiber aerogel is a titanium dioxide nanofiber aerogel with an ordered cell structure; the preparation method comprises the following steps:
s1, attaching a plurality of graphene oxide particles to the surface of the nano titanium dioxide nanofiber aerogel;
s11, ultrasonically dispersing graphene oxide particles in deionized water to form a graphene oxide particle suspension;
s12, adding nano titanium dioxide nanofiber aerogel into the graphene oxide particle suspension, sending the mixture into a high-pressure homogenizer for homogenization after complete adsorption, and drying to obtain the graphene oxide particle suspension;
s2 preparation of graphite oxideBiVO is attached to the surfaces of the alkene particles and the surfaces of the titanium dioxide nanofiber aerogel4A nanoparticle;
s21, ultrasonically dispersing the titanium dioxide nanofiber aerogel with the graphene oxide particles attached to the surface in water to obtain a suspension;
s22, adding BiVO4 nano-particles into the suspension, carrying out ultrasonic dispersion for 6min, violently stirring for 30min, washing with deionized water, dispersing in water, carrying out hydrothermal reaction for 15h at 120 ℃, washing, and drying to obtain the product.
In this embodiment, the graphene oxide particles, the titanium dioxide nanofiber aerogel and the BiVO are used as the active components4The mass ratio of the nanoparticles is 2: 10:5.
Example 2
In this embodiment, the mass ratio of the graphene oxide particles, the titanium dioxide nanofiber aerogel and the BiVO4 nanoparticles is 8: 10:5.
Example 3
In this embodiment, the graphene oxide particles, the titanium dioxide nanofiber aerogel and the BiVO are used as the active components4The mass ratio of the nanoparticles is 1: 3:5
The structures of the composite materials obtained in example 1, example and example 3 were characterized by ultraviolet-visible absorption spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The performance of the composite material for photocatalytic degradation of Methylene Blue (MB) was studied under ultraviolet and visible light conditions. The results show that the degradation rate of the composite materials obtained in the examples 1, 3 and 3 is 99% within 100min, and the composite materials can be recycled for at least 15 times.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. A nano composite photocatalytic material is characterized in that: comprises a nano titanium dioxide nano fiber aerogel and a plurality of graphite oxides attached to the surface of the titanium dioxide nano fiber aerogelAlkene particles and BiVO attached to surfaces of graphene oxide particles and titanium dioxide nanofiber aerogel4And (3) nanoparticles.
2. The nano-composite photocatalytic material of claim 1, wherein: the titanium dioxide nanofiber aerogel is a titanium dioxide nanofiber aerogel with an ordered cell structure.
3. The nano-composite photocatalytic material of claim 1, wherein: the adjustment of the attachment density of the graphene oxide particles on the surface of the titanium dioxide nanofiber aerogel is realized by adjusting the mass ratio of the graphene oxide particles to the titanium dioxide nanofiber aerogel.
4. The nano-composite photocatalytic material of claim 1, wherein: through oxidized graphene particles, titanium dioxide nanofiber aerogel and BiVO4The adjustment of the mass ratio of the nano particles realizes the oxidation of graphene particles and BiVO on the surface of the titanium dioxide nano fiber aerogel4Nanoparticle attachment density and graphene oxide particle surface BiVO4And (4) adjusting the attachment density of the nanoparticles.
5. A preparation method of a nano composite photocatalytic material is characterized by comprising the following steps: the method comprises the following steps:
s1, attaching a plurality of graphene oxide particles to the surface of the nano titanium dioxide nanofiber aerogel;
s2, attaching BiVO on the surfaces of graphene oxide particles and titanium dioxide nanofiber aerogel4And (3) nanoparticles.
6. The method for preparing a nano composite photocatalytic material as claimed in claim 5, wherein: the step S1 includes the following steps:
s11, ultrasonically dispersing graphene oxide particles in deionized water to form a graphene oxide particle suspension;
and S12, adding nano titanium dioxide nanofiber aerogel into the graphene oxide particle suspension, sending the mixture into a high-pressure homogenizer for homogenization after complete adsorption, and drying to obtain the graphene oxide particle suspension.
7. The method for preparing a nano composite photocatalytic material as claimed in claim 5, wherein: the step S2 includes the following steps:
s21, ultrasonically dispersing the titanium dioxide nanofiber aerogel with the graphene oxide particles attached to the surface in water to obtain a suspension;
s22, adding BiVO4 nano-particles into the suspension, carrying out ultrasonic dispersion for 6min, violently stirring for 30min, washing with deionized water, dispersing in water, carrying out hydrothermal reaction for 15h at 120 ℃, washing, and drying to obtain the product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113788590A (en) * | 2021-10-25 | 2021-12-14 | 郝冬亮 | Efficient environment-friendly sewage treatment method |
| CN115947508A (en) * | 2023-03-13 | 2023-04-11 | 湖南环宏环保科技有限公司 | Advanced treatment method of garbage squeezing liquid |
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2021
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