CN113058630B - Preparation method and application of photocatalyst suitable for efficiently removing formaldehyde at room temperature - Google Patents
Preparation method and application of photocatalyst suitable for efficiently removing formaldehyde at room temperature Download PDFInfo
- Publication number
- CN113058630B CN113058630B CN202110276727.2A CN202110276727A CN113058630B CN 113058630 B CN113058630 B CN 113058630B CN 202110276727 A CN202110276727 A CN 202110276727A CN 113058630 B CN113058630 B CN 113058630B
- Authority
- CN
- China
- Prior art keywords
- tio
- photocatalyst
- formaldehyde
- qds
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 46
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004202 carbamide Substances 0.000 claims abstract description 11
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims abstract description 10
- 230000000593 degrading effect Effects 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000002135 nanosheet Substances 0.000 claims abstract description 7
- 239000013078 crystal Substances 0.000 claims abstract description 3
- 238000001354 calcination Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 2
- 239000002096 quantum dot Substances 0.000 abstract description 34
- 230000001699 photocatalysis Effects 0.000 abstract description 17
- 238000007146 photocatalysis Methods 0.000 abstract description 8
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 4
- 239000002243 precursor Substances 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000003054 catalyst Substances 0.000 description 11
- 235000013877 carbamide Nutrition 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 239000010453 quartz Substances 0.000 description 4
- 239000012495 reaction gas Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 206010064571 Gene mutation Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000028990 Skin injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000003855 cell nucleus Anatomy 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- -1 coatings Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
-
- B01J35/39—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a preparation method and application of a photocatalyst for efficiently degrading formaldehyde at room temperature. Firstly, preparing anatase TiO with high exposed (001) crystal face 2 Nanosheet (TiO) 2 (001) g-C) and then 3 N 4 Quantum Dots (QDs) dispersed in TiO 2 (001) Thereby preparing g-C with higher activity of degrading formaldehyde by photocatalysis 3 N 4 QDs/TiO 2 A photocatalyst. By adjusting g-C 3 N 4 Different amounts of QDs precursor Urea to prepare g-C of different proportions 3 N 4 QDs/TiO 2 The photocatalyst is verified through experiments when urea and TiO are mixed 2 When the mass ratio is 7:1, the photocatalyst has the best activity of photocatalytic degradation of formaldehyde, and keeps higher photocatalytic formaldehyde removal performance under different relative humidity conditions. The photocatalyst has low price of raw materials, is environment-friendly, has simple preparation method and has larger market application potential.
Description
Technical Field
The invention belongs to the technical field of catalysts, and particularly relates to a preparation method and application of a photocatalyst for efficiently removing formaldehyde at room temperature.
Background
Formaldehyde is a common indoor organic pollutant and is characterized by colorless and pungent odor. In many decorative materials, such as coatings, paints and glues, there is a formaldehyde content. After long-term exposure in formaldehyde environment, serious harm is caused to the health, such as nausea, headache, skin injury and other diseases, and even serious diseases such as leukemia, cell nucleus gene mutation, cancer and the like are caused. Therefore, the removal of formaldehyde from the environment is critical to the protection of human health. Researchers have developed a number of techniques to eliminate indoor formaldehyde pollution, including ventilation, adsorption, catalytic oxidation to remove formaldehyde, etc. Most of the developed technologies are not suitable for practical application because they have the disadvantages of low degradation efficiency, easy adsorption saturation and secondary pollution. Research shows that the photocatalytic oxidation method can effectively remove indoor formaldehyde and has great market application potential. The photocatalytic oxidation method is characterized in that a semiconductor material absorbs photons with energy larger than or equal to the forbidden band width (Eg) of the semiconductor material, so that electrons jump from a valence band to a conduction band to form photo-generated electrons, photo-generated electron holes are generated on the valence band, and photo-generated carriers formed by photo-generated electron-hole pairs can effectively participate in an oxidation-reduction reaction, so that target pollutants are removed. The existing photocatalyst in the field of removing formaldehyde by photocatalysis has the defects of complex preparation process, high cost and difficult industrial application. Therefore, the development of the photocatalyst with the performance of efficiently degrading formaldehyde at room temperature has great market application potential.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a preparation method of a photocatalyst for removing formaldehyde at room temperature, and solves the problems of complex preparation process, high preparation cost, difficulty in realizing industrial application and the like in the prior art. The photocatalyst prepared by the invention can efficiently degrade formaldehyde.
One of the technical schemes adopted by the invention is to provide a preparation method of a photocatalyst for efficiently degrading formaldehyde at room temperature, which specifically comprises the following steps:
(1) preparation of (001) TiO with high-exposure (001) crystal face 2 Nanosheet: uniformly mixing 15-25mL of tetrabutyl titanate and 4-6mL of 48 wt% HF solution, and putting the mixture into a high-pressure reaction kettle for hydrothermal reaction; after the reaction is finished and cooled, repeatedly washing the reaction product by deionized water to be neutral, drying the reaction product for 10 to 15 hours, and calcining the reaction product to obtain TiO 2 (001) Nanosheets;
(2) preparation of g-C with high activity of photocatalytic degradation of formaldehyde 3 N 4 QDs/TiO 2 Photocatalyst: g to C 3 N 4 Quantum Dots (QDs) dispersed in TiO 2 On the nano-chip, using g-C 3 N 4 The quantum size effect of QDs can widen the band gap of the photocatalyst, thereby preparing g-C with high activity of photocatalytic degradation of formaldehyde 3 N 4 QDs/TiO 2 A photocatalyst. Specifically, mixing TiO with 2 Mixing urea with the mass ratio of 1:2-15, grinding for 5-15 minutes, then placing the mixture into a crucible with a cover, and calcining in a muffle furnace, wherein the temperature rise rate of the calcination in the muffle furnace is 2-3 ℃/min, the calcination temperature is 450-550 ℃, and the calcination time is 3-5 h; cooling to room temperature by air after calcining, and collecting the obtained powder which is g-C 3 N 4 QDs/TiO 2 。
In a recommended embodiment, the temperature of the hydrothermal reaction in the step (1) is 150 ℃ and 250 ℃ and the time is 20-28 h;
in a preferred embodiment, the temperature rise rate of the calcination in the step (1) is 1.5-2.5 ℃/min, the calcination temperature is 500-600 ℃, and the calcination time is 1.5-2.5 h.
In a preferred embodiment, the TiO in step (2) 2 And urea in a mass ratio of 1: 7.
In a recommended embodiment, the temperature rise rate of the muffle furnace calcination in the step (2) is 2.3 ℃/min, the calcination temperature is 500 ℃, and the calcination time is 4 h.
The second technical scheme adopted by the invention is that the photocatalyst g-C prepared by the preparation method 3 N 4 QDs/TiO 2 。
In a preferred embodiment, the photocatalyst is distributed in a platelet structure, g-C 3 N 4 QDs are distributed in TiO in a dotted manner 2 On the surface, the lattice spacing was 0.33 nm.
The third technical scheme adopted by the invention is to prepare the photocatalyst g-C 3 N 4 QDs/TiO 2 The method is applied to photocatalytic degradation of formaldehyde at room temperature.
In a preferred embodiment, the formaldehyde is subjected to photocatalytic degradation in the presence of a photocatalyst at a relative humidity of 20% to 60%.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention prepares g-C by a simple method 3 N 4 QDs/TiO 2 Photocatalyst distributed in a lamellar structure having a quantum size g-C 3 N 4 QDs are distributed in TiO in a dotted manner 2 On the surface. Using g-C 3 N 4 The quantum size effect of QDs can widen the band gap of the photocatalyst, thereby preparing g-C with high activity of photocatalytic degradation of formaldehyde 3 N 4 QDs/TiO 2 A photocatalyst. The preparation scheme is simple, the price of the precursor is low, and the method is more suitable for industrial application. The catalyst can keep excellent performance of degrading formaldehyde by photocatalysis at room temperature, has good stability and can be repeatedly used.
2. The photocatalyst prepared by the method of the invention does not cause secondary pollution to the environment in the using process.
3. The photocatalyst prepared by the method has simple operation process and high repeatability, and the preparation process of the catalyst only needs conventional equipment and instruments, so that the method is suitable for industrial large-scale production.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and examples.
FIG. 1 shows photocatalysts g-C prepared in example 2 of the present invention 3 N 4 QDs/TiO 2 The microscopic morphology picture of (1).
FIG. 2 shows the reaction of urea and TiO in examples 1 to 3 of the present invention 2 g-C prepared in different mass proportions 3 N 4 QDs/TiO 2 With pure TiO 2 Performance curve of photocatalytic formaldehyde removal under room temperature condition.
FIG. 3 is g-C prepared in example 2 of the present invention 3 N 4 QDs/TiO 2 The degradation performance curve of the photocatalyst to formaldehyde under different relative humidity.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following will describe the contents of the present invention in more detail by way of examples, but the scope of the present invention is not limited to these examples.
Example 1
Preparation of g-C for photocatalytic removal of Low-concentration Formaldehyde 3 N 4 QDs/TiO 2 Catalyst:
(1) uniformly mixing 20mL of tetrabutyl titanate and 5mL of 48% HF solution, putting the mixture into a high-pressure reaction kettle, and heating the mixture at 200 ℃ for 24 hours; cooling, washing with deionized water to pH 7, drying for 12 hr, heating to 550 deg.C at 2 deg.C/min, and calcining for 2 hr to obtain TiO 2 (001) Nanosheets.
(2) 1g of TiO 2 (001) And 2g of urea, and after grinding for 10 minutes, the mixture was placed in a crucible with a lid and heated at 500 ℃ for 4h in a muffle furnace at a ramp rate of 2.3 ℃/min. After air cooling to room temperature, the resulting powder was collected at 2:1g-C 3 N 4 QDs/TiO 2 。
Example 2
Preparation of g-C for photocatalytic removal of Low-concentration Formaldehyde 3 N 4 QDs/TiO 2 Catalyst:
(1) mixing 20mL of tetrabutyl titanate and 5mL of 48% HF, putting into a high-pressure reaction kettle, and heating at 200 ℃ for 24 hours; cooling, washing with deionized water to pH 7, drying for 12 hr, heating to 550 deg.C at 2 deg.C/min, and calcining for 2 hr to obtain TiO 2 (001) Nanosheets.
(2) 1g of TiO 2 (001) And 7g of urea, and after grinding for 10 minutes, the mixture was placed in a crucible with a lid and heated at 500 ℃ for 4h in a muffle furnace at a ramp rate of 2.3 ℃/min. After air cooling to room temperature, the resulting powder was collected, i.e., 7:1g-C 3 N 4 QDs/TiO 2 。
Example 3
Preparation of g-C for photocatalytic removal of Low-concentration Formaldehyde 3 N 4 QDs/TiO 2 Catalyst:
(1)20mL of tetrabutyl titanate and 5mL of 48% HF were mixed and placed in a high pressure reactorHeating in a kettle at 200 ℃ for 24 h; cooling, washing with deionized water to pH 7, drying for 12 hr, heating to 550 deg.C at 2 deg.C/min, and calcining for 2 hr to obtain TiO 2 (001)。
(2) 1g of TiO 2 (001) And 15g of urea, and after grinding for 10 minutes, the mixture was placed in a crucible with a lid and heated at 500 ℃ for 4h in a muffle furnace at a ramp rate of 2.3 ℃/min. After air cooling to room temperature, the resulting powder was collected at 15:1g-C 3 N 4 QDs/TiO 2 。
Example 4
Analyzing the microscopic appearance of the sample:
for g-C prepared in example 2 3 N 4 The QDs photocatalyst samples were further analyzed for their microscopic morphology using transmission electron microscopy, as shown in FIG. 1, TiO 2 In a lamellar structure, g-C 3 N 4 QDs are distributed in TiO in a dotted manner 2 On the surface. By measuring TiO 2 Has a lattice spacing of 0.24nm, corresponding to TiO 2 The (001) plane of (a). Introduction of g-C 3 N 4 After QDs, TiO was observed 2 Uniformly depositing many dark spots on the surface, locally amplifying the dark spots, measuring the lattice spacing of 0.33nm corresponding to g-C 3 N 4 The (002) plane of QDs. And g-C can be proven by element mapping 3 N 4 QDs have been successfully incorporated into TiO 2 (001) On the surface.
Example 5
The catalyst prepared in the embodiment 1-3 is used for carrying out the photocatalysis formaldehyde removal reaction, and the specific method comprises the following steps: filling 0.3g of catalyst into a quartz reactor, taking air and high-purity nitrogen which is taken as formaldehyde carrier gas by a formaldehyde generating device as reaction gas, mixing the air and the high-purity nitrogen which is carried with formaldehyde, and then introducing the mixture into the quartz reactor, wherein the total inlet flow is 700 mL/min; the change in formaldehyde concentration at the outlet was recorded and the formaldehyde removal rate was calculated.
Different ureas and TiO prepared in examples 1-3 from FIG. 2 2 Ratio of g to C 3 N 4 QDs/TiO 2 With pure TiO 2 Photocatalytic formaldehyde removal performance under room temperature conditionAs can be seen from the curves, urea and TiO 2 When the mass ratio of the components is 2:1, 7:1 and 15:1, the corresponding formaldehyde degradation performance can reach about 80%, 90% and 70%, which fully indicates that g-C 3 N 4 /TiO 2 Has good performance of removing formaldehyde by photocatalysis, and can be used as urea and TiO 2 When the mass ratio of (A) to (B) is 7:1, the prepared photocatalyst has the best activity of photocatalytic degradation of formaldehyde.
Example 6
The catalyst prepared in the example 2 is used for carrying out a photocatalytic formaldehyde removal reaction under the ultraviolet light condition, and the specific method comprises the following steps: 0.3g of catalyst was charged to a quartz reactor; high-purity nitrogen is taken as carrier gas to pass through a formaldehyde generating device, so that the discharged nitrogen carries a certain amount of formaldehyde; introducing high-purity nitrogen with a fixed flow rate into a water tank as carrier gas, so that the discharged nitrogen carries a certain amount of moisture; mixing the high-purity nitrogen carrying a certain amount of formaldehyde, the high-purity nitrogen carrying a certain amount of moisture and air to serve as reaction gas, and introducing the reaction gas into a quartz reaction device, wherein the total gas inflow is 700 mL/min; the relative humidity of the reaction gas was measured by a hygrometer, the change in the concentration of formaldehyde at the outlet was recorded and the formaldehyde removal rate was calculated.
g-C prepared from example 2 of FIG. 3 3 N 4 QDs/TiO 2 The degradation performance curve of the photocatalyst to formaldehyde under different relative humidities can be known, and the g-C is obtained under the condition that the relative humidity is 20 percent 3 N 4 /TiO 2 The formaldehyde removal performance of the photocatalysis can be obviously improved, and the formaldehyde degradation performance is stabilized at about 100 percent; g-C at a relative humidity of 40% 3 N 4 /TiO 2 The performance of the catalyst for removing formaldehyde by photocatalysis is stabilized at about 88 percent; g-C at a relative humidity of 60% 3 N 4 /TiO 2 The performance of removing formaldehyde by photocatalysis is stabilized at about 83 percent.
The foregoing is for illustrative purposes only, and therefore the scope of the present invention should not be limited by this description, and modifications made within the scope of the present invention and the content of the description should be understood to fall within the scope of the present invention.
Claims (6)
1. A preparation method of a photocatalyst for efficiently degrading formaldehyde at room temperature is characterized by comprising the following steps: the method comprises the following steps:
(1) preparation of powdered { 001 } TiO with highly exposed { 001 } crystal face 2 Nanosheet: uniformly mixing 15-25mL of tetrabutyl titanate and 4-6mL of 48 wt% HF solution, and putting the mixture into a high-pressure reaction kettle for hydrothermal reaction; after the reaction is finished and cooled, repeatedly washing the reaction product by deionized water to be neutral, drying the reaction product for 10 to 15 hours, and calcining the reaction product to obtain { 001 } TiO 2 Nanosheets;
(2) preparation of g-C with high activity of photocatalytic degradation of formaldehyde 3 N 4 QDs/｛001｝TiO 2 Photocatalyst: mixing { 001 } TiO 2 Mixing the mixture and urea in a mass ratio of 1:7, grinding for 5-15 minutes, putting the mixture into a crucible with a cover, and calcining in a muffle furnace, wherein the heating rate of the muffle furnace for calcination is 2.3 ℃/min, the calcination temperature is 500 ℃, and the calcination time is 4 h; cooling to room temperature by air after calcining, and collecting the obtained powder which is g-C 3 N 4 QDs/｛001｝TiO 2 ；g-C 3 N 4 QDs are distributed in the { 001 } TiO domain in a dotted manner 2 On the surface, the lattice spacing was 0.33 nm.
2. The preparation method of the photocatalyst for efficiently degrading formaldehyde at room temperature according to claim 1, wherein the photocatalyst comprises: the temperature of the hydrothermal reaction in the step (1) is 150-250 ℃, and the time is 20-28 h.
3. The preparation method of the photocatalyst for efficiently degrading formaldehyde at room temperature according to claim 1, wherein the photocatalyst comprises: the temperature rise rate of the calcination in the step (1) is 1.5-2.5 ℃/min, the calcination temperature is 500-600 ℃, and the calcination time is 1.5-2.5 h.
4. Photocatalyst g-C prepared by the method according to any one of claims 1 to 3 3 N 4 QDs/｛001｝TiO 2 。
5. Use of a photocatalyst as claimed in claim 4, characterized in that: the method is applied to photocatalytic degradation of formaldehyde at room temperature.
6. Use of a photocatalyst as claimed in claim 4, characterized in that: in the presence of the photocatalyst, the formaldehyde is subjected to photocatalytic degradation under the condition that the relative humidity is 20% -60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110276727.2A CN113058630B (en) | 2021-03-15 | 2021-03-15 | Preparation method and application of photocatalyst suitable for efficiently removing formaldehyde at room temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110276727.2A CN113058630B (en) | 2021-03-15 | 2021-03-15 | Preparation method and application of photocatalyst suitable for efficiently removing formaldehyde at room temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113058630A CN113058630A (en) | 2021-07-02 |
| CN113058630B true CN113058630B (en) | 2022-08-26 |
Family
ID=76561487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110276727.2A Active CN113058630B (en) | 2021-03-15 | 2021-03-15 | Preparation method and application of photocatalyst suitable for efficiently removing formaldehyde at room temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113058630B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115624975A (en) * | 2022-10-28 | 2023-01-20 | 华侨大学 | Non-noble metal catalyst suitable for efficiently removing formaldehyde at room temperature and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104998672A (en) * | 2015-06-03 | 2015-10-28 | 华南理工大学 | G-C3N4/{001}TiO2 composite visible-light-driven photocatalyst and preparation method and application thereof |
| CN106475125A (en) * | 2016-08-29 | 2017-03-08 | 上海电力学院 | Graphite phase carbon nitride and nano titanium oxide composite coating additive and preparation method |
| 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 |
| CN109433241A (en) * | 2018-11-14 | 2019-03-08 | 华东理工大学 | A kind of quantum-dot modified TiO of carbonitride2The preparation and application of photonic crystal catalyst |
| CN112264075A (en) * | 2020-11-09 | 2021-01-26 | 华侨大学 | High-efficiency demercuration photocatalyst suitable for medium-low temperature condition and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191263B (en) * | 2020-10-26 | 2022-10-14 | 五邑大学 | TiO 2 2 Photo catalysisChemical composite material and preparation method and application thereof |
-
2021
- 2021-03-15 CN CN202110276727.2A patent/CN113058630B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104998672A (en) * | 2015-06-03 | 2015-10-28 | 华南理工大学 | G-C3N4/{001}TiO2 composite visible-light-driven photocatalyst and preparation method and application thereof |
| CN106475125A (en) * | 2016-08-29 | 2017-03-08 | 上海电力学院 | Graphite phase carbon nitride and nano titanium oxide composite coating additive and preparation method |
| 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 |
| CN109433241A (en) * | 2018-11-14 | 2019-03-08 | 华东理工大学 | A kind of quantum-dot modified TiO of carbonitride2The preparation and application of photonic crystal catalyst |
| CN112264075A (en) * | 2020-11-09 | 2021-01-26 | 华侨大学 | High-efficiency demercuration photocatalyst suitable for medium-low temperature condition and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| Revisiting structural and photocatalytic properties of g-C3N4/TiO2:Is surface modification of TiO2 by calcination with urea an effectiveroute to "solar" photocatalyst?;Huixin Zong etal.;《Catalysis Today》;20190930;第30卷(第1期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113058630A (en) | 2021-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ouyang et al. | A systematical study on photocatalytic properties of AgMO2 (M= Al, Ga, In): effects of chemical compositions, crystal structures, and electronic structures | |
| Zaleska | Doped-TiO2: a review | |
| CN107497456B (en) | Preparation method and application of layered bismuth oxychloride visible-light-driven photocatalyst | |
| CN103172030B (en) | Oxide powder and preparation method thereof as well as catalyst and carrier thereof | |
| KR101319064B1 (en) | Method of preparing platinum catalyst for removing formaldehyde, carbon dioxide, methanol and hydrogen | |
| CN103086420B (en) | Nanometer gallium oxide and application thereof | |
| CN108927157B (en) | Cu2O/{001}TiO2Preparation method of composite catalyst and application of composite catalyst to dynamic purification of ammonia gas | |
| CN112299469A (en) | Cerium dioxide and preparation method and application thereof | |
| CN107774285A (en) | A kind of preparation method and applications of high activity non-stoichiometric BiOBr catalysis materials | |
| CN113262808A (en) | Water-soluble graphite-phase carbon nitride nanosheet catalyst for efficiently removing formaldehyde at room temperature and preparation method thereof | |
| CN110575832A (en) | Preparation method and application of silver-titanium dioxide-nano diamond composite photocatalyst | |
| CN109603809A (en) | A kind of preparation and application of pucherite quantum dot and titanium dioxide nano-belts composite photo-catalyst | |
| CN110711591A (en) | Preparation method and application of catalyst for photocatalytic degradation of VOCs (volatile organic compounds) | |
| CN113058630B (en) | Preparation method and application of photocatalyst suitable for efficiently removing formaldehyde at room temperature | |
| CN106362768B (en) | A kind of honeycomb ceramic plate loads TiO2The preparation technology of the immobilized photochemical catalysts of-NCP | |
| CN111482168A (en) | Visible light catalyst for efficiently degrading phenol and preparation method thereof | |
| CN113926443B (en) | Multi-component composite material for removing aldehyde through visible light catalysis, preparation method and air purifier | |
| CN108568302B (en) | Opposite-symmetrical double-Z-shaped acoustic catalyst SnO2–CdSe–Bi2O3And preparation method and application thereof | |
| CN108671956B (en) | Preparation method of ion-filled graphite-phase carbon nitride nanosheet | |
| CN108607549B (en) | Visible light catalyst Ag-H2Ti4O9And preparation method and application thereof | |
| CN112058291A (en) | Microspherical composite visible-light-driven photocatalyst and rapid preparation method and application thereof | |
| JP2003192347A (en) | Titanium oxide, and photocatalyst body and photocatalyst coating agent obtained by using the same | |
| CN113797910B (en) | Defect-containing nano microspherical perovskite catalyst and preparation method and application thereof | |
| CN108654673B (en) | Novel photocatalytic material and preparation method and application thereof | |
| CN101912780A (en) | Preparation method of titanium dioxide visible light photocatalyst with iron oxide modified surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |