CN109453799B - Nitrogen-doped carbon material coated nano titanium dioxide material and application thereof - Google Patents
Nitrogen-doped carbon material coated nano titanium dioxide material and application thereof Download PDFInfo
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- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 27
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 title claims abstract description 25
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
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- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
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- 239000000203 mixture Substances 0.000 claims description 23
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 150000002894 organic compounds Chemical class 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
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- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
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- 230000000593 degrading effect Effects 0.000 claims description 4
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- USDJGQLNFPZEON-UHFFFAOYSA-N [[4,6-bis(hydroxymethylamino)-1,3,5-triazin-2-yl]amino]methanol Chemical compound OCNC1=NC(NCO)=NC(NCO)=N1 USDJGQLNFPZEON-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 2
- 239000004744 fabric Substances 0.000 abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 230000003197 catalytic effect Effects 0.000 abstract description 6
- 230000001699 photocatalysis Effects 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 abstract description 4
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 229910021392 nanocarbon Inorganic materials 0.000 abstract description 4
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- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 30
- 239000010453 quartz Substances 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 230000015556 catabolic process Effects 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000008098 formaldehyde solution Substances 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 102220573234 Ras-related protein Ral-A_A48W_mutation Human genes 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
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- 231100000021 irritant Toxicity 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- -1 phenolic aldehyde amine Chemical class 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
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- 238000002834 transmittance Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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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
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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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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a nitrogen-doped carbon material-coated nano titanium dioxide material and application thereof. The nano titanium dioxide material is as follows: the surface of the nano carbon dioxide is coated with a nitrogen-doped carbon material, and the mass ratio of the nano carbon dioxide to the nitrogen-doped carbon material is as follows: 1: 1-1: 3; the particle size of the nano titanium dioxide is 20-80 nm, and the nitrogen-doped carbon material is as follows: consists of chemical structures such as pyrrole, pyridine, graphite, amorphous carbon and the like. The nitrogen-doped carbon material has high oxygen reduction catalytic activity, and the nano TiO is subjected to nitrogen-doped carbon material2The in-situ coating modification is carried out, so that not only can nano TiO be improved2The dispersibility and the photocatalytic stability of the composite material are improved, and the adsorbability of the composite material is improved, so that the catalytic performance and the efficiency of the composite material are improved. On the basis, nitrogen-doped carbon-coated nano TiO2The self-cleaning air-permeable fabric is dispersed in water and impregnated to obtain the self-cleaning air-permeable fabric, and has technical advantages and innovativeness.
Description
Technical Field
The invention relates to a nitrogen-doped carbon material-coated nano titanium dioxide material and application thereof.
Background
The pollutants in the air are mainly volatile organic compounds, including automobile exhaust, harmful gases discharged by industry, aldehyde harmful gases released by indoor furniture, irritant gases generated during smoking, and the like. Mixing nanometer TiO2The photocatalyst is used for degrading harmful substances in indoor air environment when being arranged on indoor textiles such as carpets, curtains, mats and the like or automobile interior decoration materials, and has very important significance for improving living environment of people and improving health level of people. Therefore, the research and application of the air purification textile have obvious economic value and social value.
Nano TiO 22Has excellent photocatalytic property, but nano TiO2The problems of poor dispersibility and reduced catalytic performance of the powder exist in the application process, and the existing nano TiO2The modification method of (A) is to improve the dispersibility of the nano SiO by a chemical or physical method2Doping modification and the like for nano TiO2The dispersibility and the application performance of the composite material are obviously improved, but the process is complex and the practical application difficulty is higher.
Disclosure of Invention
One of the objectives of the present invention is to provide a nitrogen-doped carbon material-coated nano titanium dioxide material.
The second purpose of the invention is to provide a preparation method of the nanometer titanium dioxide material coated by the nitrogen-doped carbon material.
The invention also aims to provide the application of the nitrogen-doped carbon material-coated nano titanium dioxide material as a photocatalyst in degrading organic compounds.
In order to achieve the purpose, the invention adopts the following technical scheme:
a nitrogen-doped carbon material coated nano titanium dioxide material is characterized in that the nano titanium dioxide material is as follows: the surface of the nano carbon dioxide is coated with a nitrogen-doped carbon material, and the mass ratio of the nano carbon dioxide to the nitrogen-doped carbon material is as follows: 1: 1-1: 3; the particle size of the nano titanium dioxide is 20-80 nm, and the nitrogen-doped carbon material is as follows: consists of chemical structures such as pyrrole, pyridine, graphite, amorphous carbon and the like.
A method for preparing the nitrogen-doped carbon material-coated nano titanium dioxide material is characterized by comprising the following specific steps:
a. dissolving an organic compound containing nitrogen and oxygen in deionized water or a 1mol/L HCL solution to form a 3-10 wt% aqueous solution; then according to nano TiO in aqueous solution2Adding nano TiO into an organic compound containing nitrogen and oxygen at a mass ratio of 1: 1-1: 32Stirring to mix them uniformly; then drying the obtained mixture in an oven at the temperature of 120-150 ℃ for 8-10 h, and removing water;
b. b, carrying out heat treatment on the mixture obtained in the step a for 8-12 hours at 700-1000 ℃ in an inert atmosphere to obtain black powder, namely the modified nano TiO coated by the nitrogen-doped carbon material2。
The organic compound containing both nitrogen and oxygen is: chitosan, gelatin, phenalkamine, trimethylolaminopropane, or trimethylolmelamine.
The nanometer titanium dioxide material coated by the nitrogen-doped carbon material is used as photocatalysis.
The application of the nanometer titanium dioxide material coated by the nitrogen-doped carbon material as photocatalysis in degrading organic compounds.
The air self-cleaning textile is characterized in that the air self-cleaning textile is obtained by dispersing the nano titanium dioxide material coated by the nitrogen-doped carbon material in water and impregnating the surface of the textile.
The preparation method of the air self-cleaning textile comprises the following specific steps: fully grinding the nitrogen-doped carbon material coated nano titanium dioxide material obtained in the step b to the particle size<1 μm, dispersed in an aqueous solution containing 2wt% of an aqueous hyperdispersant prepared according to the method of the patent "nonionic polyurethane aqueous hyperdispersant and preparation method thereof (201510979174.1)", to obtain modified nano TiO2A dispersion in an amount of 10 wt%; and (3) soaking the textile in the dispersion liquid for 5-10 min, and drying at normal temperature to obtain the air self-cleaning textile.
The invention uses nitrogen-doped carbon material to react with nano TiO2In-situ coating method for realizing nano TiO2Stable dispersion and improved catalytic performance. The nitrogen-doped carbon material has higher oxygen reduction catalytic activity, and the nano TiO is treated by the nitrogen-doped carbon material2The in-situ coating modification is carried out, so that not only can nano TiO be improved2The dispersibility and the photocatalytic stability of the composite material are improved, and the adsorbability of the composite material is improved, so that the catalytic performance and the efficiency of the composite material are improved. On the basis, nitrogen-doped carbon-coated nano TiO2The self-cleaning air-permeable fabric is dispersed in water and impregnated to obtain the self-cleaning air-permeable fabric, and has technical advantages and innovativeness.
Detailed Description
The following illustrates the present invention, but is not limited to the scope of the examples.
The first embodiment is as follows: air self-cleaning textile 1#Preparation of
(a) 30g of trimethylolpropane is weighed and dissolved in 330mL of deionized water, and the solution is stirred and dissolved. Then adding nano TiO210g, stirring and dispersing uniformly. The dispersion was then transferred to an oven and dried at 120 ℃ for 10h to remove water.
(b) B, putting the mixture obtained in the step a and subjected to the water removal into a quartz boat, putting the quartz boat into a tube furnace, and reacting the quartz boat with the mixture in the presence of N2Under the protection, the modified nanometer TiO coated by the nitrogen-doped carbon material is obtained after heat treatment for 12 hours at the temperature of 700 DEG C2。
(c) C, modifying the modified nano TiO obtained in the step b2On the basis of full grindingDispersing in water containing 2wt% of self-made aqueous hyper-dispersant to obtain modified nano TiO2A dispersion in an amount of 10 wt%. The modified nano TiO is added2The dispersion is dipped on the surface of the textile and dried at normal temperature to obtain the air self-cleaning textile 1#。
Example two: air self-cleaning textile 2#Preparation of
(a) 20g of trimethylolmelamine is weighed and dissolved in 330mL of deionized water, and the solution is stirred and dissolved. Then adding nano TiO210g, and stirring and dispersing uniformly. The dispersion was then transferred to an oven and dried at 130 ℃ for 10h to remove water.
(b) B, putting the mixture obtained in the step a and subjected to the water removal into a quartz boat, putting the quartz boat into a tube furnace, and reacting the quartz boat with the mixture in the presence of N2Under the protection, the modified nanometer TiO coated by the nitrogen-doped carbon material is obtained after the heat treatment for 11 hours at the temperature of 800 DEG C2。
(c) C, modifying the modified nano TiO obtained in the step b2Dispersing the mixture in water containing 2wt% of self-made aqueous hyper-dispersant on the basis of full grinding to obtain modified nano TiO2A dispersion in an amount of 10 wt%. The modified nano TiO is added2The dispersion is dipped on the surface of the textile and dried at normal temperature to obtain the air self-cleaning textile 2#。
Example three: air self-cleaning textile 3#Preparation of
(a) 10g of chitosan is weighed and dissolved in 330mL of 1mol/L HCL solution, and the solution is stirred and dissolved. Then adding nano TiO210g, stirring and dispersing uniformly. The dispersion was then transferred to an oven and dried at 140 ℃ for 10h to remove water.
(b) B, putting the mixture obtained in the step a and subjected to the water removal into a quartz boat, putting the quartz boat into a tube furnace, and reacting the quartz boat with the mixture in the presence of N2Under the protection, the modified nanometer TiO coated by the nitrogen-doped carbon material is obtained after heat treatment for 10 hours at the temperature of 900 DEG C2。
(c) C, modifying the modified nano TiO obtained in the step b2Dispersing in water containing 2wt% of self-made aqueous hyper-dispersant on the basis of full grinding to obtain modified nano TiO2A dispersion in an amount of 10 wt%. The modified nano TiO is added2The dispersion is dipped on the surface of the textile and dried at normal temperature to obtain the air self-cleaning textile 3#。
Example four: air self-cleaning textile 4#Preparation of
(a) Weighing 10g of phenolic aldehyde amine, dissolving in 330mL of 1mol/L HCL solution, and stirring to dissolve. Then adding nano TiO210g, stirring and dispersing uniformly. The dispersion was then transferred to an oven and dried at 150 ℃ for 10h to remove water.
(b) B, putting the mixture obtained in the step a and subjected to the water removal into a quartz boat, putting the quartz boat into a tube furnace, and reacting the quartz boat with the mixture in the presence of N2Under the protection, the modified nanometer TiO coated by the nitrogen-doped carbon material is obtained after heat treatment for 8 hours at the temperature of 1000 DEG C2。
(c) C, modifying the modified nano TiO obtained in the step b2Dispersing the mixture into water containing 2wt% of self-made aqueous hyper-dispersant on the basis of full grinding to obtain modified nano TiO2A dispersion in an amount of 10 wt%. The modified nano TiO is added2The dispersion is dipped on the surface of the textile and dried at normal temperature to obtain the air self-cleaning textile 4#。
Example five: air self-cleaning textile 5#Preparation of
(a) 10g of gelatin is weighed and dissolved in 330mL of deionized water, and the gelatin is dissolved by stirring. Then adding nano TiO210g, stirring and dispersing uniformly. The dispersion was then transferred to an oven and dried at 150 ℃ for 10h to remove water.
(b) B, putting the mixture obtained in the step a and subjected to the water removal into a quartz boat, putting the quartz boat into a tube furnace, and reacting the quartz boat with the mixture in the presence of N2Under the protection, the mixture is thermally treated for 9 hours at the temperature of 800 ℃ to obtain the nitrogen-doped carbon material coated modified nano TiO2。
(c) C, modifying the modified nano TiO obtained in the step b2Dispersing the mixture in water containing 2wt% of self-made aqueous hyper-dispersant on the basis of full grinding to obtain modified nano TiO2A dispersion in an amount of 10 wt%. The modified nano TiO is added2By dipping into a solution ofDrying the surface of the fabric at normal temperature to obtain the air self-cleaning textile 5#。
Example six: detection of air self-cleaning textile performance
The air self-cleaning textile in the above embodiment was subjected to a performance test, and the test results are shown in table 1.
The test method is as follows: two organic glass driers with the same specification are selected as a reaction device, organic glass cannot react with formaldehyde gas, and the light transmittance is good. 100mL of formaldehyde solution with the concentration of 10ppm is prepared, the formaldehyde solution is placed in a watch glass and is placed at the bottom of a dryer to simulate the formaldehyde environment, and a ceramic ventilation plate is placed in the middle of the dryer. 100mL of distilled water is put into a culture dish as a solution to be detected, the fabric is tightly buckled on the upper layer of the culture dish by a rubber band, the culture dish is placed on a breathable ceramic plate, and a ground glass cover is covered. A48W (365 nm wavelength) UV lamp was placed on top of the entire apparatus. And opening an ultraviolet lamp, and measuring the content of formaldehyde in the solution to be measured by an acetylacetone spectrophotometry after 3 hours. The photocatalytic formaldehyde degradation performance of the fabric is characterized by formaldehyde degradation rate. The formaldehyde degradation rate is calculated by the following formula:
in the formula: M-Formaldehyde degradation rate; c0Placing the original cloth and then measuring the absorbance of the liquid to be measured; and C, placing the finished fabric, and then measuring the absorbance of the solution to be measured.
TABLE 1 Formaldehyde degradation rate of air self-cleaning textiles
| Sample numbering | Degradation rate of formaldehyde |
| 1# | 50％ |
| 2# | 55％ |
| 3# | 70％ |
| 4# | 60％ |
| 5# | 65％ |
As can be seen from Table 1, the air self-cleaning textile has an obvious degradation effect on formaldehyde under the irradiation of ultraviolet light.
Claims (6)
1. A nitrogen-doped carbon material coated nano titanium dioxide material is characterized in that the nano titanium dioxide material is as follows: the surface of the nano titanium dioxide is coated with a nitrogen-doped carbon material, and the mass ratio of the nano titanium dioxide to the nitrogen-doped carbon material is as follows: 1: 1-1: 3; the particle size of the nano titanium dioxide is 20-80 nm; the nitrogen-doped carbon material-coated nano titanium dioxide material is prepared by the following steps:
a. dissolving an organic compound containing nitrogen and oxygen in deionized water or 1mol/L HCL solution to form 3-10 wt% of aqueous solution, and then mixing the aqueous solution with nano TiO according to nitrogen-containing organic matters2Adding nano TiO into the mixture according to the mass ratio of 1: 1-3: 12Stirring to mix them uniformly; then drying the obtained mixture in an oven at the temperature of 120-150 ℃ for 8-10 h, and removing water; the organic compound containing both nitrogen and oxygen is: chitosan, gelatin, phenalkamine, trimethylolpropane or trimethylolmelamine;
b. c, subjecting the mixture obtained in the step a to 700-1000 ℃ in an inert atmosphereHeat treating for 8-12 hours under the condition to obtain black powder, namely the modified nanometer TiO coated by the nitrogen-doped carbon material2。
2. A method for preparing the nitrogen-doped carbon material coated nano titanium dioxide material according to claim 1, which is characterized by comprising the following specific steps:
a. dissolving an organic compound containing nitrogen and oxygen in deionized water or 1mol/L HCL solution to form 3-10 wt% of aqueous solution, and then mixing the aqueous solution with nano TiO according to nitrogen-containing organic matters2Adding nano TiO into the mixture according to the mass ratio of 1: 1-3: 12Stirring to mix them uniformly; then drying the obtained mixture in an oven at the temperature of 120-150 ℃ for 8-10 h, and removing water;
b. b, carrying out heat treatment on the mixture obtained in the step a for 8-12 hours at 700-1000 ℃ in an inert atmosphere to obtain black powder, namely the modified nano TiO coated by the nitrogen-doped carbon material2。
3. Use of the nitrogen-doped carbon material-coated nano-titania material according to claim 1 as a photocatalyst.
4. The use of the nitrogen-doped carbon material-coated nano titanium dioxide material according to claim 1 as a photocatalyst for degrading organic compounds.
5. An air self-cleaning textile, which adopts the nitrogen-doped carbon material coated nano titanium dioxide material as the photocatalyst, and is characterized in that the air self-cleaning textile is obtained by dispersing the nitrogen-doped carbon material coated nano titanium dioxide material in water and impregnating the surface of the textile.
6. Air self-cleaning textile product according to claim 5, characterised in that it is made of a material which is a mixture of two or more of the above mentioned materialsThe air isThe preparation method of the self-cleaning textile comprises the following specific steps:fully grinding the nitrogen-doped carbon material coated nano titanium dioxide material obtained in the step b to the particle size<1 μm; dispersing in aqueous solution containing 2wt% of aqueous hyper-dispersant to obtain modified nano TiO2A dispersion in an amount of 10 wt%; and (3) soaking the textile in the dispersion liquid for 5-10 min, and drying at normal temperature to obtain the air self-cleaning textile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811098479.1A CN109453799B (en) | 2018-09-20 | 2018-09-20 | Nitrogen-doped carbon material coated nano titanium dioxide material and application thereof |
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| CN111530467B (en) * | 2019-10-23 | 2021-02-05 | 宁夏大学 | Carbon modified copper-based catalyst and preparation method and application thereof |
| CN111313025A (en) * | 2020-02-25 | 2020-06-19 | 厦门理工学院 | Nitrogen-doped carbon-coated flaky titanium oxide material and preparation method and application thereof |
| CN111871446A (en) * | 2020-08-14 | 2020-11-03 | 大连工业大学 | Preparation method of biomass-based carbon @ tantalum nitride composite photocatalytic material and application of composite photocatalytic material in photocatalytic degradation of methylene blue |
| CN112206833A (en) * | 2020-10-19 | 2021-01-12 | 陕西科技大学 | Hollow titanium dioxide @ MIL-101 composite nano microsphere and preparation method and application thereof |
| CN112999404B (en) * | 2021-04-30 | 2022-01-11 | 河北宁纺集团有限责任公司 | Stretchable nanofiber membrane and preparation method and application thereof |
| CN114904558B (en) * | 2022-06-16 | 2023-07-18 | 天津大学 | Preparation method of hollow nitrogen-doped carbon-coated titanium dioxide photocatalyst |
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