CN112517047A - Preparation method of carbon nitride/titanium dioxide embedded heterojunction, product and application thereof - Google Patents
Preparation method of carbon nitride/titanium dioxide embedded heterojunction, product and application thereof Download PDFInfo
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 74
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000006185 dispersion Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000011941 photocatalyst Substances 0.000 claims abstract description 8
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims abstract description 7
- 239000002243 precursor Substances 0.000 claims abstract description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 24
- 239000002270 dispersing agent Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000008367 deionised water Substances 0.000 claims description 17
- 229910021641 deionized water Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- 229920000877 Melamine resin Polymers 0.000 claims description 15
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- UUWJHAWPCRFDHZ-UHFFFAOYSA-N 1-dodecoxydodecane;phosphoric acid Chemical compound OP(O)(O)=O.CCCCCCCCCCCCOCCCCCCCCCCCC UUWJHAWPCRFDHZ-UHFFFAOYSA-N 0.000 claims description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- GWTCIAGIKURVBJ-UHFFFAOYSA-L dipotassium;dodecyl phosphate Chemical compound [K+].[K+].CCCCCCCCCCCCOP([O-])([O-])=O GWTCIAGIKURVBJ-UHFFFAOYSA-L 0.000 claims description 2
- TVACALAUIQMRDF-UHFFFAOYSA-N dodecyl dihydrogen phosphate Chemical compound CCCCCCCCCCCCOP(O)(O)=O TVACALAUIQMRDF-UHFFFAOYSA-N 0.000 claims description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 claims 1
- -1 polyoxyethylene nonylphenol Polymers 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 6
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 5
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000001699 photocatalysis Effects 0.000 description 4
- 239000008247 solid mixture Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000007787 solid Substances 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B01J35/23—
-
- B01J35/39—
-
- 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
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0027—Powdering
- B01J37/0036—Grinding
-
- 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
- B01J37/082—Decomposition and pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
Abstract
The invention relates to a preparation method of a carbon nitride/titanium dioxide embedded heterojunction, a product and application thereof, and the preparation method is used for preparing the carbon nitride/titanium dioxide embedded heterojunction photocatalyst by one-step roasting in a mode of mixing a nano titanium dioxide dispersion liquid and a carbon nitride precursor. The carbon nitride/titanium dioxide heterojunction prepared by the method has the advantages of high separation efficiency of photoproduction electrons and holes, good performance of photocatalytic degradation of formaldehyde, simple operation and lower difficulty, and is suitable for large-scale production.
Description
Technical Field
The invention belongs to the field of nano material preparation, and particularly relates to a preparation method of a carbon nitride/titanium dioxide embedded heterojunction, a product and application thereof.
Background
Energy is the material basis on which humans live and on which human civilization exists. Since the 21 st century, with the rapid development of industry, the demand of human beings for energy has been greatly increased, which causes the exhaustion of non-renewable fossil energy on the one hand and also brings about very serious environmental problems on the other hand. Because solar energy has the characteristics of cleanness, large energy, abundant reserves and the like, the technology for utilizing the solar energy becomes a key for solving the energy and environmental crisis in the new century. The photocatalytic technology is a new technology which can utilize solar energy to purify the environment and convert energy and is rapidly developed in recent years. The general energy band gap is moderate, electrons can jump under the irradiation of sunlight, so that high-energy photo-generated electrons and photo-generated hole pairs are formed, when the photo-generated electrons and the photo-generated hole pairs contact with oxygen and water in the air, redox reaction can be carried out to generate active free radicals such as superoxide free radicals, hydroxyl free radicals and the like, and the free radicals can degrade pollutants, kill bacteria, viruses and the like. Compared with other technologies, the photocatalysis technology is safe, efficient and free of secondary pollution, and pollutants are thoroughly oxidized and decomposed into CO2、H2O and the like. However, the existing photocatalytic materials still have various problems.
The carbon nitride is a yellow nano crystal synthesized by roasting a material rich in carbon elements and nitrogen elements to a certain extent. Its crystal structure is similar to that of graphite. Because the carbon nitride groups are only in one molecular layer, only weak van der waals forces can link different molecular layers. It is well known that light can generate electron-hole pairs in such materials. Therefore, carbon nitride has excellent photocatalytic performance. The device can convert low-density solar energy into high-density chemical energy or directly degrade and mineralize organic pollutants, and has important application prospect in the aspects of solving the problems of energy shortage, environmental pollution and the like. However, the photo-generated electrons and holes are easy to recombine before catalytic reaction occurs, which severely limits the catalytic efficiency.
Due to the difference of valence band and conduction band positions of the two semiconductors, when light is irradiated by sunlight to separate electrons and holes, the photogenerated electrons and the holes can migrate, so that the electrons and the holes are respectively positioned on the surfaces of different semiconductors, and the recombination of the photogenerated electrons and the holes is further inhibited. However, the heterojunction structure constructed at present is often too loose, and the transmission of photogenerated carriers at the interface of the two needs to cross a larger potential barrier, which causes unnecessary recombination at the interface of the two, and limits the improvement of the separation efficiency of the photogenerated electron/hole pairs.
Disclosure of Invention
Aiming at the defect that the conventional carbon nitride photogenerated electrons and holes are easy to recombine, the invention aims to provide a preparation method of a carbon nitride/titanium dioxide embedded heterojunction.
Yet another object of the present invention is to: provides a carbon nitride/titanium dioxide embedded heterojunction product prepared by the method.
Yet another object of the present invention is to: provides an application of the product.
The purpose of the invention is realized by the following scheme: a preparation method of a carbon nitride/titanium dioxide embedded heterojunction photocatalyst is a preparation method of a carbon nitride/titanium dioxide embedded heterojunction photocatalyst by one-step roasting in a mode of mixing a nano titanium dioxide dispersion liquid and a carbon nitride precursor, and comprises the following steps:
1) weighing nano titanium dioxide, a dispersing agent and deionized water according to a formula, firstly adding the dispersing agent into the deionized water, stirring to dissolve the dispersing agent, then adding the nano titanium dioxide, stirring and mixing uniformly, and then grinding in a sand mill to obtain nano titanium dioxide dispersion liquid; the mass ratio of the nano titanium dioxide to the dispersing agent to the deionized water is 1 (0.05-1) to 10-500;
2) adding melamine into the nano titanium dioxide dispersion liquid, wherein the mass ratio of the nano titanium dioxide dispersion liquid to the melamine is 1: 0.05-0.8, and then stirring at 60-100 ℃ until the solution is evaporated to dryness to obtain a uniform mixture of the melamine and the nano titanium dioxide; and grinding the mixture, putting the ground mixture into a crucible with a cover, heating the mixture to 450-600 ℃ in a muffle furnace at a heating rate of 2.5 ℃/min, preserving the heat for 1-7 hours, naturally cooling, centrifuging, washing and drying to obtain the carbon nitride/titanium dioxide embedded heterojunction.
Wherein, the dispersing agent in the step 1) is one or the combination of lauryl sodium sulfate, potassium monododecyl phosphate, nonylphenol polyoxyethylene ether, hexadecyl trimethyl ammonium bromide, monolauryl phosphate, potassium lauryl alcohol ether phosphate and polyvinylpyrrolidone.
Further, in the step 1), the grinding machine rotates at 500-3000 r/min for 1-10 hours.
The mass ratio of the nano titanium dioxide dispersion liquid to the melamine in the step 2) is 1: 0.05-0.8.
The invention provides a carbon nitride/titanium dioxide embedded heterojunction, which is prepared by any one of the methods.
The invention provides an application of a carbon nitride/titanium dioxide embedded heterojunction serving as a catalyst in photocatalytic degradation of formaldehyde.
The preparation method of the carbon nitride/titanium dioxide heterojunction provided by the invention comprises the following steps: accurately weighing nano titanium dioxide, a dispersing agent and deionized water, dissolving the dispersing agent in a proper amount of deionized water, then adding the nano titanium dioxide, uniformly stirring, adding the nano titanium dioxide into a sand mill, and grinding at a certain rotating speed to obtain a monodisperse nano titanium dioxide dispersion liquid. Mixing the carbon nitride/titanium dioxide embedded heterojunction with a proper amount of melamine, stirring at high temperature, evaporating to dryness, roasting the obtained solid substance in a crucible, grinding, centrifuging, washing and drying, and finally directly preparing the carbon nitride/titanium dioxide embedded heterojunction.
The carbon nitride/titanium dioxide heterojunction prepared by the method has the advantages of high separation efficiency of photoproduction electrons and holes, good performance of photocatalytic degradation of formaldehyde, simple operation and lower difficulty, and is suitable for large-scale production.
Drawings
FIG. 1 is a graph showing the formaldehyde decomposition efficiency of a conventional commercial titanium dioxide photocatalyst and samples according to the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The first embodiment is as follows:
a carbon nitride/titanium dioxide embedded heterojunction is prepared by a method for preparing a carbon nitride/titanium dioxide embedded heterojunction photocatalyst by one-step roasting in a mode of mixing a nano titanium dioxide dispersion liquid and a carbon nitride precursor, and comprises the following steps:
1) weighing nano titanium dioxide, a dispersant nonylphenol polyoxyethylene ether and deionized water according to a formula, wherein the mass ratio of the nano titanium dioxide to the dispersant to the deionized water is 1:0.2: 100; firstly, adding a dispersing agent into deionized water, stirring to dissolve the dispersing agent, adding nano titanium dioxide, stirring and mixing uniformly, and then grinding for 5 hours in a sand mill at the rotating speed of 2000 revolutions per minute to obtain nano titanium dioxide dispersion liquid;
2) adding melamine into the nano titanium dioxide dispersion liquid, wherein the mass ratio of the nano titanium dioxide dispersion liquid to the melamine is 1:0.7, and then stirring at 80 ℃ until the solution is evaporated to dryness to obtain a uniform mixture of the melamine and the nano titanium dioxide; and grinding the mixture, putting the ground mixture into a crucible with a cover, heating the mixture to 500 ℃ in a muffle furnace at a heating rate of 2.5 ℃/min, preserving the heat for 3 hours, naturally cooling, centrifuging, washing and drying to obtain the carbon nitride/titanium dioxide embedded heterojunction.
FIG. 1 is a graph showing the formaldehyde decomposition efficiency of a conventional commercial titanium dioxide photocatalyst and samples according to the present invention, and Table 1 shows the formaldehyde decomposition efficiency of a conventional commercial titanium dioxide photocatalyst and samples according to the present invention.
The prepared carbon nitride/titanium dioxide heterojunction has high separation efficiency of photo-generated electrons and holes, good performance of photocatalytic degradation of formaldehyde, and formaldehyde removal rate of more than 94.5 percent, which is shown in figure 1 and table 1.
Example two:
a carbon nitride/titanium dioxide embedded heterojunction is prepared by the following steps similar to the steps of the example 1:
1) accurately weighing nano titanium dioxide, a dispersant potassium lauryl ether phosphate and deionized water according to a formula, enabling the mass ratio of the nano titanium dioxide to the dispersant to the deionized water to be 1:0.2: 200, dissolving the dispersant in the deionized water, then adding the nano titanium dioxide, stirring uniformly, then adding the mixture into a sand mill, and grinding for 5 hours at the rotating speed of 1800 rpm to obtain a monodisperse nano titanium dioxide dispersion liquid;
2) mixing the nano titanium dioxide dispersion liquid with melamine according to the mass ratio of 1:0.5, and then stirring at the temperature of 100 ℃ until the solution is evaporated to dryness to obtain a uniform mixture of melamine and nano titanium dioxide; and grinding the solid mixture, putting the ground solid mixture into a crucible with a cover, heating the mixture to 550 ℃ in a muffle furnace at the heating rate of 2.5 ℃/min, preserving the heat for 5 hours, naturally cooling, centrifuging, washing and drying to obtain the carbon nitride/titanium dioxide embedded heterojunction.
The prepared carbon nitride/titanium dioxide heterojunction has high separation efficiency of photo-generated electrons and holes, good performance of photocatalytic degradation of formaldehyde, and formaldehyde removal rate of more than 93.1%, as shown in figure 1 and table 1.
Example three:
a carbon nitride/titanium dioxide embedded heterojunction is prepared by the following steps similar to the steps of the example 1:
1) accurately weighing the nano titanium dioxide, the dispersant sodium dodecyl sulfate and the deionized water according to the formula, wherein the mass ratio of the nano titanium dioxide to the dispersant to the deionized water is 1:0.3: 500; dissolving a dispersing agent in deionized water, adding nano titanium dioxide, uniformly stirring, adding into a sand mill, and grinding for 1 hour at the rotating speed of 2500 rpm to obtain a monodisperse nano titanium dioxide dispersion liquid;
2) mixing the nano titanium dioxide dispersion liquid with melamine according to the mass ratio of 1:0.3, and then stirring at the temperature of 90 ℃ until the solution is evaporated to dryness to obtain a uniform mixture of melamine and nano titanium dioxide; and grinding the solid mixture, putting the ground solid mixture into a crucible with a cover, heating the mixture to 550 ℃ in a muffle furnace at the heating rate of 2.5 ℃/min, preserving the heat for 7 hours, naturally cooling, centrifuging, washing and drying to obtain the carbon nitride/titanium dioxide embedded heterojunction.
The prepared carbon nitride/titanium dioxide heterojunction has high separation efficiency of photoproduction electrons and holes, good performance of photocatalytic degradation of formaldehyde, and formaldehyde removal rate of more than 96.2 percent, as shown in figure 1 and table 1:
Claims (5)
1. a preparation method of a carbon nitride/titanium dioxide embedded heterojunction is characterized in that the preparation method of the carbon nitride/titanium dioxide embedded heterojunction photocatalyst is prepared by one-step roasting in a mode of mixing a nano titanium dioxide dispersion liquid and a carbon nitride precursor, and comprises the following steps:
1) weighing nano titanium dioxide, a dispersing agent and deionized water according to a formula, firstly adding the dispersing agent into the deionized water, stirring to dissolve the dispersing agent, then adding the nano titanium dioxide, stirring and mixing uniformly, and then grinding in a sand mill to obtain nano titanium dioxide dispersion liquid; the mass ratio of the nano titanium dioxide to the dispersing agent to the deionized water is 1 (0.05-1) to 10-500;
2) adding melamine into the nano titanium dioxide dispersion liquid, wherein the mass ratio of the nano titanium dioxide dispersion liquid to the melamine is 1: 0.05-0.8, and then stirring at 60-100 ℃ until the solution is evaporated to dryness to obtain a uniform mixture of the melamine and the nano titanium dioxide; and grinding the mixture, putting the ground mixture into a crucible with a cover, heating the mixture to 450-600 ℃ in a muffle furnace at a heating rate of 2.5 ℃/min, preserving the heat for 1-7 hours, naturally cooling, centrifuging, washing and drying to obtain the carbon nitride/titanium dioxide embedded heterojunction.
2. The method for preparing a carbon nitride/titanium dioxide embedded heterojunction as claimed in claim 1, wherein in the step 1), the dispersant is one or a combination of sodium dodecyl sulfate, potassium monododecyl phosphate, polyoxyethylene nonylphenol ether, cetyltrimethylammonium bromide, monolauryl phosphate, potassium lauryl ether phosphate and polyvinylpyrrolidone.
3. The method for preparing the carbon nitride/titanium dioxide embedded heterojunction as claimed in claim 1 or 2, wherein in the step 1), the grinding machine is 500-3000 r/min for 1-10 hours.
4. A carbon nitride/titanium dioxide embedded heterojunction, characterized in that it is prepared according to the method of any one of claims 1 to 3.
5. Use of the carbon nitride/titanium dioxide embedded heterojunction as claimed in claim 4 as a catalyst in the photocatalytic degradation of formaldehyde.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113522337A (en) * | 2021-07-13 | 2021-10-22 | 上海市农业科学院 | Preparation method and application method of titanium-based nano material for photocatalytic degradation of DON |
| CN114471146A (en) * | 2022-02-10 | 2022-05-13 | 杭州妙蓝环保科技有限公司 | Green odorless formaldehyde scavenger and preparation method thereof |
| CN115141398A (en) * | 2022-06-22 | 2022-10-04 | 吉翔宝（太仓）离型材料科技发展有限公司 | Degradable is from type membrane |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107115884A (en) * | 2017-06-12 | 2017-09-01 | 青岛科技大学 | A kind of g C3N4/TiO2Nano wire package assembly photochemical catalyst and preparation method thereof |
| CN107398293A (en) * | 2017-08-06 | 2017-11-28 | 武汉轻工大学 | A kind of fibrous Z-type photochemical catalyst TiO for handling organic sewage2/g‑C3N4Preparation method |
| CN109399587A (en) * | 2018-12-18 | 2019-03-01 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of mesoporous carbonitride and products thereof and application |
| CN109499597A (en) * | 2018-11-20 | 2019-03-22 | 浙江理工大学上虞工业技术研究院有限公司 | A kind of preparation method of poriferous titanium dioxide/azotized carbon nano particulate composite |
| CN111250139A (en) * | 2020-02-29 | 2020-06-09 | 青岛科技大学 | Mixed crystal TiO2/g-C3N4Nano hollow tube composite material and preparation method thereof |
-
2020
- 2020-12-29 CN CN202011595944.XA patent/CN112517047A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107115884A (en) * | 2017-06-12 | 2017-09-01 | 青岛科技大学 | A kind of g C3N4/TiO2Nano wire package assembly photochemical catalyst and preparation method thereof |
| CN107398293A (en) * | 2017-08-06 | 2017-11-28 | 武汉轻工大学 | A kind of fibrous Z-type photochemical catalyst TiO for handling organic sewage2/g‑C3N4Preparation method |
| CN109499597A (en) * | 2018-11-20 | 2019-03-22 | 浙江理工大学上虞工业技术研究院有限公司 | A kind of preparation method of poriferous titanium dioxide/azotized carbon nano particulate composite |
| CN109399587A (en) * | 2018-12-18 | 2019-03-01 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of mesoporous carbonitride and products thereof and application |
| CN111250139A (en) * | 2020-02-29 | 2020-06-09 | 青岛科技大学 | Mixed crystal TiO2/g-C3N4Nano hollow tube composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JIAGUO YU等: ""Enhanced photocatalytic performance of direct Z-scheme g-C3N4/TiO2 photocatalyst for decomposition of formaldehyde in air"", 《PHYSICAL CHEMISTRY CHEMICAL PHYSICS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113522337A (en) * | 2021-07-13 | 2021-10-22 | 上海市农业科学院 | Preparation method and application method of titanium-based nano material for photocatalytic degradation of DON |
| CN114471146A (en) * | 2022-02-10 | 2022-05-13 | 杭州妙蓝环保科技有限公司 | Green odorless formaldehyde scavenger and preparation method thereof |
| CN115141398A (en) * | 2022-06-22 | 2022-10-04 | 吉翔宝（太仓）离型材料科技发展有限公司 | Degradable is from type membrane |
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