CN114471723B - Construction method of double-electron transfer channel photocatalyst - Google Patents
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 18
- 238000012546 transfer Methods 0.000 title claims abstract description 11
- 238000010276 construction Methods 0.000 title claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 47
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 42
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000243 solution Substances 0.000 claims abstract description 25
- 230000027756 respiratory electron transport chain Effects 0.000 claims abstract description 20
- 235000019441 ethanol Nutrition 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- GPNNOCMCNFXRAO-UHFFFAOYSA-N 2-aminoterephthalic acid Chemical compound NC1=CC(C(O)=O)=CC=C1C(O)=O GPNNOCMCNFXRAO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 7
- 238000001291 vacuum drying Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000005684 electric field Effects 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims description 10
- 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 6
- 230000009977 dual effect Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009210 therapy by ultrasound Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 36
- 230000001699 photocatalysis Effects 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000005215 recombination Methods 0.000 abstract description 3
- 230000006798 recombination Effects 0.000 abstract description 3
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003760 magnetic stirring Methods 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 description 8
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 7
- 229940043267 rhodamine b Drugs 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910003077 Ti−O Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- 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
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/2208—Oxygen, e.g. acetylacetonates
- B01J31/2226—Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
- B01J31/2243—At least one oxygen and one nitrogen atom present as complexing atoms in an at least bidentate or bridging ligand
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/40—Complexes comprising metals of Group IV (IVA or IVB) as the central metal
- B01J2531/46—Titanium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention provides a construction method of a double electron transfer channel photocatalyst, CQDs (carbon quantum dots) are added into absolute ethyl alcohol to form CQDs ethanol solution, and then g-C is added 3 N 4 (graphite-like phase carbon nitride) is added into absolute ethanol, CQDs ethanol solution is added into g-C 3 N 4 Adding the product obtained by magnetic stirring, sealing, constant temperature heating, cooling, vacuum drying and grinding and 2-amino terephthalic acid into N, N-dimethylformamide and methanol solution in ethanol solution, putting the mixed solution into a polytetrafluoroethylene reaction kettle, heating, naturally cooling, centrifuging and vacuum drying to obtain the double-electron transfer channel photocatalyst CQDs/g-C 3 N 4 /NH 2 MIL-125. By constructing the composite structure, an internal electric field and a van der Waals heterojunction are established, a double-channel electron transfer mode is constructed, the electron transfer efficiency is improved, the recombination of photo-generated electron hole pairs is inhibited, and the photocatalytic activity is further improved.
Description
Technical Field
The invention relates to the technical field of photocatalysts, in particular to a construction method of a double-electron transfer channel photocatalyst.
Background
The photocatalysis technology is one of the common advanced oxidation technologies and is an effective means for solving the environmental pollution problem. The photocatalysis technology can utilize sunlight as energy source and reactThe material is not selective, and almost can undergo oxidation-reduction reaction with any organic pollutant, and further can finally oxidize the organic pollutant into CO 2 And H 2 O, therefore, the photocatalysis technology has wide application prospect in the aspect of environmental pollution treatment. The recombination of the photo-generated electrons and the holes is an important factor for restricting the photo-catalytic efficiency, so that the improvement of the transfer and separation efficiency of the photo-generated electrons is an important research point of the photo-catalytic technology.
Disclosure of Invention
The invention aims to provide a construction method of a double-electron transfer channel photocatalyst, which specifically comprises the following steps:
a. weighing a certain amount of CQDs (carbon quantum dots) and adding the CQDs into absolute ethyl alcohol to form a CQDs ethanol solution;
b. an amount of g-C 3 N 4 Adding (graphite-like carbon nitride) into absolute ethanol, performing ultrasonic treatment for 30-60 min, and adding CQDs ethanol solution into g-C 3 N 4 Forming suspension in ethanol solution, and magnetically stirring for 1h;
c. b, placing the suspension in the step b into a polytetrafluoroethylene reaction kettle, sealing, heating for 2 hours at 60-100 ℃ in a constant temperature box, cooling to room temperature, and vacuum drying the obtained product for 2 hours at 60-100 ℃;
d. grinding the dried product in the step C to obtain CQDs/g-C 3 N 4 A powder;
e. the CQDs/g-C obtained in step d 3 N 4 Adding 2-amino terephthalic acid into N, N-dimethylformamide and methanol solution, uniformly mixing, adding tetrabutyl titanate, and stirring for 30-60 min at room temperature;
f. placing the mixed solution into a polytetrafluoroethylene reaction kettle, heating for 24 hours at 120-180 ℃, naturally cooling, centrifugally separating, washing with N, N-dimethylformamide and methanol respectively, and vacuum drying for 6-10 hours at 80 ℃ to obtain the double-electron transfer channel photocatalyst CQDs/g-C 3 N 4 /NH 2 -MIL-125。
Preferably, in the step a, the volume ratio of the mass of CQDs to the absolute ethanol may be: (5-10) mg:10ml, the optimal mass and volume ratio is 9mg:10ml.
Preferably, in said step b, the mass of CQDs, g-C 3 N 4 The volume ratio of the mass to the suspension can be (5-10) mg: (80-100) mg: in the range of 40ml, the mass of CQDs, g-C 3 N 4 The optimum ratio of mass to volume of suspension is 9mg:90mg:40ml.
Preferably, in said step e, CQDs/g-C 3 N 4 The mass of 2-aminoterephthalic acid, the volume ratio of the N, N-dimethylformamide and methanol solution to tetrabutyl titanate may be (2 to 20) mg: (1000-2000) mg:27ml: (0.2-1.0) ml, the optimal ratio is 5.4mg:1087mg:27ml:0.52ml.
Preferably, in the step e, the volume ratio of the N, N-dimethylformamide to the methanol is 9:1.
preferably, in the step f, the washing with the N, N-dimethylformamide and the methanol solution is performed 3 times.
Preferably, CQDs/g-C is obtained 3 N 4 /NH 2 MIL-125 has a two-channel electron transfer through g-C 3 N 4 And NH 2 -electron transfer by a built-in electric field of MILs-125 construction; by CQDs with g-C 3 N 4 The van der Waals heterojunction formed therebetween performs electron transfer.
Compared with the prior art, the invention has the advantages and effects that:
the invention is coupled with g-C 3 N 4 CQDs/g-C was developed with proper band placement and the property of CQDs to promote electron transfer 3 N 4 /NH 2 MIL-125 composite photocatalyst establishes an internal electric field and a Van der Waals heterojunction by constructing a composite structure, constructs a double-channel electron transfer mode, improves the electron transfer efficiency, inhibits the recombination of photo-generated electron hole pairs, and further improves the photocatalytic activity;
CQDs/g-C 3 N 4 /NH 2 degradation removal capability of MIL-125 on rhodamine B (RhB) as a dye pollutant in water compared with NH 2 MIL-125 and g-C 3 N 4 Can be raised by about 38.8% and 71.0%, respectively.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows CQDs/g-C obtained in the examples of the present invention 3 N 4 /NH 2 SEM image of MIL-125;
FIG. 2 shows CQDs/g-C obtained in the examples of the present invention 3 N 4 /NH 2 -an XPS spectrum of MILs-125, wherein a graph a is a full spectrum of binding energy of C, N, ti, O element, b is a full spectrum of binding energy of C element, C is a full spectrum of binding energy of N element, d is a full spectrum of binding energy of Ti element, and e is a full spectrum of binding energy of O element;
FIG. 3 shows CQDs/g-C obtained in the examples of the present invention 3 N 4 /NH 2 -MILs-125 dual channel electron transfer schematic;
FIG. 4 shows CQDs/g-C obtained in the examples of the present invention 3 N 4 /NH 2 -effect of MILs-125 on degradation of rhodamine B dye in water.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; some well-known structures in the drawings and descriptions thereof may be omitted to those skilled in the art.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Examples
9mg of CQDs were weighed and added to 10mL of absolute ethanol to form an ethanol solution of CQDs. 90mg g-C 3 N 4 Adding into absolute ethanol, and ultrasonic treating for 60min. Will beCQDs ethanol solution is added to g-C 3 N 4 40mL of a suspension was formed in ethanol solution and magnetically stirred for 1h. The suspension was placed in a 100mL polytetrafluoroethylene reaction vessel, sealed, and heated in an incubator at 90℃for 2h. Cooled to room temperature and the resulting product was dried in vacuo at 90℃for 2h. Grinding to obtain CQDs/g-C 3 N 4 And (3) powder.
5.4mg CQDs/g-C was taken 3 N 4 And 1.087g of 2-amino terephthalic acid were added to a volume of 27mL of N, N-dimethylformamide and methanol solution (volume ratio: 9:1), and after mixing uniformly, 0.52mL of tetrabutyl titanate was added thereto and stirred at room temperature for 30 minutes. The mixed solution is put into a polytetrafluoroethylene reaction kettle and heated for 24 hours at 150 ℃. Naturally cooling, centrifugally separating, washing with N, N-dimethylformamide and methanol for 3 times, and vacuum drying at 80deg.C for 6 hr to obtain double electron transfer channel photocatalyst CQDs/g-C 3 N 4 /NH 2 MIL-125, as shown in FIG. 1, is CQDs/g-C obtained for the examples 3 N 4 /NH 2 SEM image of MIL-125.
As shown in FIG. 2, CQDs/g-C are obtained 3 N 4 /NH 2 -XPS spectrum of MIL-125, the surface chemical composition is mainly C, N, O, ti four elements. In b, the C1s spectrum contains four peaks, and the binding energy is 284.54eV, 285.08eV, 286.24eV and 288.79eV respectively, wherein 284.54eV corresponds to C-C, C=C and C-H. The bond energies elsewhere correspond to C-N, C-O, C =o. In the N1s spectrum in graph c, there are three bond energies of 399.3eV, 399.9eV and 402.1eV, which correspond to NH respectively 2 -NH of MIL-125 2 -、g-C 3 N 4 N- (C) of (2) 3 Positively charged nitrogen (N) + /-NH + -). In d graph, ti 2p mainly has two bond energies of 458.8eV and 464.5eV, which correspond to Ti 2p respectively 3/2 And Ti 2p 1/2 Indicating that the Ti in the titanyl cluster is still in the IV oxidation state after the titanium has been combined with oxygen. In e, the spectrum represents O1s, wherein 530.1eV corresponds to NH 2 The bond energy of the Ti-O bond of the MIL-125 ligand corresponding to C=O and OH is 531.5eV and 532.3eV respectively.
As shown in FIG. 3, a two-channel electron transfer schematic diagram, channel one, is obtained in the embodimentBy g-C 3 N 4 And NH 2 -electron transfer by a built-in electric field of MILs-125 construction; channel two, through CQDs and g-C 3 N 4 The van der Waals heterojunction formed therebetween performs electron transfer.
The obtained double electron transfer channel photocatalyst CQDs/g-C 3 N 4 /NH 2 -MIL-125、NH 2 -MIL-125、g-C 3 N 4 Representative dye contaminants rhodamine B (RhB) were separately degraded under the same conditions. Preparing the solution with the concentration of 5mg/L and the volume of 100mL, adding 20mg of photocatalyst, carrying out dark reaction for 60min, adopting a 35W xenon lamp to carry out illumination, setting the distance between a light source and a reactor to be 14cm, carrying out photocatalytic treatment for 2h, extracting a small amount of liquid at the same interval time point, centrifuging (4000 rpm,10 min) and collecting supernatant. The concentration of RhB in the solution was measured by an ultraviolet-visible spectrophotometer.
As shown in FIG. 4, the experimental results indicate that CQDs/g-C 3 N 4 /NH 2 Degradation removal capability of MIL-125 on dye contaminant RhB in water over NH 2 MIL-125 and g-C 3 N 4 The improvement of about 38.8 percent and 71.0 percent is the optimal proposal.
The inventor performs experiments on the dosage, the volume and the proportion of various raw materials one by one through a large number of single experiments, and finally obtains the optimal scheme. The other non-optimal schemes are too many to be specifically described in this description. Some of the non-described portions of the embodiments may be implemented using or in reference to the prior art.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (5)
1. The construction method of the double electron transfer channel photocatalyst is characterized by comprising the following steps of:
a. weighing a certain amount of CQDs, and adding the CQDs into absolute ethyl alcohol to form an ethanol solution of the CQDs; wherein the volume ratio of the mass of CQDs to the absolute ethyl alcohol is (5-10) mg:10ml;
b. an amount of g-C 3 N 4 Adding the mixture into absolute ethyl alcohol, carrying out ultrasonic treatment for 30-60 min, and adding CQDs ethanol solution into g-C 3 N 4 Forming suspension in ethanol solution, and magnetically stirring for 1h; wherein the mass, g-C, of CQDs 3 N 4 The volume ratio of the mass to the suspension is (5-10) mg: (80-100) mg:40ml;
c. b, placing the suspension in the step b into a polytetrafluoroethylene reaction kettle, sealing, heating for 2 hours at 60-100 ℃ in a constant temperature box, cooling to room temperature, and vacuum drying the obtained product for 2 hours at 60-100 ℃;
d. grinding the dried product in the step C to obtain CQDs/g-C 3 N 4 A powder;
e. the CQDs/g-C obtained in step d 3 N 4 Adding 2-amino terephthalic acid into N, N-dimethylformamide and methanol solution, uniformly mixing, adding tetrabutyl titanate, and stirring for 30-60 min at room temperature;
wherein CQDs/g-C 3 N 4 The mass ratio of the mass of the 2-amino terephthalic acid, the volume of the N, N-dimethylformamide and methanol solution to the volume of the tetrabutyl titanate is (2-20) mg: (1000-2000) mg:27ml: (0.2-1.0) ml; the volume ratio of N, N-dimethylformamide to methanol is 9:1, a step of;
f. placing the mixed solution into a polytetrafluoroethylene reaction kettle, heating for 24 hours at 120-180 ℃, naturally cooling, centrifugally separating, washing with N, N-dimethylformamide and methanol respectively, and vacuum drying for 6-10 hours at 80 ℃ to obtain the double-electron transfer channel photocatalyst CQDs/g-C 3 N 4 /NH 2 -MIL-125；
CQDs/g-C obtained 3 N 4 /NH 2 MIL-125 has a two-channel electron transfer through g-C 3 N 4 And NH 2 -electron transfer by a built-in electric field of MILs-125 construction; by CQDs with g-C 3 N 4 The van der Waals heterojunction formed therebetween performs electron transfer.
2. The method for constructing a dual electron transfer channel photocatalyst according to claim 1, wherein in the step a, the volume ratio of CQDs to absolute ethanol is 9mg:10ml.
3. The method for constructing a dual electron transfer channel photocatalyst according to claim 1, wherein in the step b, the mass of CQDs, g-C 3 N 4 The mass to volume ratio of the suspension 9mg:90mg:40ml.
4. The method for constructing a dual electron transfer channel photocatalyst according to claim 1, wherein CQDs/g-C 3 N 4 The mass of 2-aminoterephthalic acid, the volume ratio of N, N-dimethylformamide and methanol solution to tetrabutyl titanate was 5.4mg:1087mg:27ml:0.52ml.
5. The method for constructing a dual electron transfer channel photocatalyst according to claim 1, wherein in the step f, the number of times of washing with the N, N-dimethylformamide and methanol solution is 3.
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| CN104722335A (en) * | 2015-01-30 | 2015-06-24 | 湖南大学 | Graphite type carbon nitride-metal organic frame composite photocatalyst as well as preparation method and application of graphite type carbon nitride-metal organic frame composite photocatalyst |
| CN104841470A (en) * | 2015-04-17 | 2015-08-19 | 浙江工业大学 | Composite titanium dioxide nano-sheet photocatalyst, preparation method and applications thereof |
| CN109550049A (en) * | 2018-12-03 | 2019-04-02 | 浙江大学 | Application of the carbon quantum dot-class graphite phase carbon nitride catalysis material in preparation sterilization and the drug for promoting skin scar healing |
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| CN104722335A (en) * | 2015-01-30 | 2015-06-24 | 湖南大学 | Graphite type carbon nitride-metal organic frame composite photocatalyst as well as preparation method and application of graphite type carbon nitride-metal organic frame composite photocatalyst |
| CN104841470A (en) * | 2015-04-17 | 2015-08-19 | 浙江工业大学 | Composite titanium dioxide nano-sheet photocatalyst, preparation method and applications thereof |
| CN109550049A (en) * | 2018-12-03 | 2019-04-02 | 浙江大学 | Application of the carbon quantum dot-class graphite phase carbon nitride catalysis material in preparation sterilization and the drug for promoting skin scar healing |
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