CN105664955A - Preparation method of copper-zinc co-doped carbon dots - Google Patents
Preparation method of copper-zinc co-doped carbon dots Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 68
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 47
- 238000000502 dialysis Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- NZPWMKBZDMRBDZ-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;sodium;zinc Chemical compound [Na].[Zn].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O NZPWMKBZDMRBDZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- ATSGLBOJGVTHHC-UHFFFAOYSA-N bis(ethane-1,2-diamine)copper(2+) Chemical compound [Cu+2].NCCN.NCCN ATSGLBOJGVTHHC-UHFFFAOYSA-N 0.000 claims description 17
- 229940071106 ethylenediaminetetraacetate Drugs 0.000 claims description 17
- NEUOBESLMIKJSB-UHFFFAOYSA-J tetrasodium;tetraacetate Chemical compound [Na+].[Na+].[Na+].[Na+].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O NEUOBESLMIKJSB-UHFFFAOYSA-J 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 239000011701 zinc Substances 0.000 abstract description 14
- 230000003197 catalytic effect Effects 0.000 abstract description 10
- 239000010949 copper Substances 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- RSMQAEOFQHAIIC-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;copper;sodium Chemical compound [Na].[Cu].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O RSMQAEOFQHAIIC-UHFFFAOYSA-N 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- LUSLGWQEKDGFIM-UHFFFAOYSA-K C(CN(CC(=O)[O-])CC(=O)[O-])N(CC(=O)O)CC(=O)[O-].[Na+].[Zn+2] Chemical compound C(CN(CC(=O)[O-])CC(=O)[O-])N(CC(=O)O)CC(=O)[O-].[Na+].[Zn+2] LUSLGWQEKDGFIM-UHFFFAOYSA-K 0.000 description 10
- YNGDWRXWKFWCJY-UHFFFAOYSA-N 1,4-Dihydropyridine Chemical compound C1C=CNC=C1 YNGDWRXWKFWCJY-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 238000006555 catalytic reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000007146 photocatalysis Methods 0.000 description 6
- 230000001699 photocatalysis Effects 0.000 description 6
- 239000010453 quartz Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 150000004699 copper complex Chemical class 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000002096 quantum dot Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000004435 EPR spectroscopy Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- 150000004753 Schiff bases Chemical group 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- VMGAPWLDMVPYIA-HIDZBRGKSA-N n'-amino-n-iminomethanimidamide Chemical compound N\N=C\N=N VMGAPWLDMVPYIA-HIDZBRGKSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 150000003222 pyridines Chemical class 0.000 description 2
- BOLDJAUMGUJJKM-LSDHHAIUSA-N renifolin D Natural products CC(=C)[C@@H]1Cc2c(O)c(O)ccc2[C@H]1CC(=O)c3ccc(O)cc3O BOLDJAUMGUJJKM-LSDHHAIUSA-N 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000002262 Schiff base Substances 0.000 description 1
- -1 carbon quantum dot compound Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002082 metal nanoparticle Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 230000007704 transition Effects 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/80—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/79—Acids; Esters
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Luminescent Compositions (AREA)
Abstract
The invention relates to a preparation method of copper-zinc co-doped carbon dots. The preparation method includes the steps of (1), mixing ethylene diamine tetraacetic acid sodium copper with ethylene diamine tetraacetic acid sodium zinc, increasing the temperature to 250-450 DEG C under the oxygen-free condition, performing thermostatic reaction for 1-5 hours and naturally cooling; (2), dissolving reacted materials (1) into water, dispersing uniformly and filtering to remove substances with particle size being larger than 0.22 micrometers; (3), subjecting a solution obtained in the step (2) to concentration prior to dialysis to remove micromolecular impurities, and evaporating a dialyzed solution to dryness so as to obtain the copper-zinc co-doped carbon dots. The preparation method of the copper-zinc co-doped carbon dots combines copper and zinc with the carbon dots, visible-light response capability and electronic transmission efficiency can be improved remarkably and effectively through synergism of the copper and the zinc, and catalytic effect of the mixed metal doped carbon dots is better than that of single metal carbon dots.
Description
Technical field
The preparation method that the present invention relates to the metal co-doped carbon quantum dot of a kind of copper zinc, belongs to technology of quantum dots field.
Background technology
With the sunlight of rich reserves for energy source, photocatalysis oxidation reaction is with its environmental favor obtaining vast research worker with economy. Luminous energy and chemical energy effectively convert too busy to get away catalysis superior activity photosensitive nanoparticle material. Therefore, in this field, material with low cost will replace the catalyst based on noble metal gradually. Carbon quantum dot has the advantages such as good water solublity, low toxicity, good biocompatibility, and has the features such as visible light-responded scope is wide, its class graphene-structured, is conducive to electron transfer to transmit; Therefore carbon quantum dot has a wide range of applications in light-catalyzed reaction, and mostly the application process of carbon quantum dot is first and other materials compound, is so conducive to improving the performance of light-catalyzed reaction.
At present, carbon quantum dot composite generally first prepares metal nanoparticle and carbon quantum dot respectively, then will the two compound. But, both composites skewness that this method is prepared, interaction force is more weak, there is certain defect.
Chinese patent document CN104759283A (application number: 201510101628.5) discloses a kind of based on copper complex formazan carbon quantum dot and preparation method thereof, utilizing the cupric ethylene diamine tetraacetate sodium salt with saturated Schiff base structure is raw material, by copper complex and the carbon quantum dot compound with class graphene-structured, adopt thermal polymerization method preparation based on the carbon quantum dot of copper complex, improve the electron transfer capacity of this type of photosensitizer. Although should based on copper complex formazan carbon quantum dot in photocatalysis Isosorbide-5-Nitrae-dihydropyridine reaction, catalytic efficiency improves, but, photocatalysis efficiency still has to be strengthened.
Summary of the invention
Being not so good as prior art, the preparation method that the present invention provides the metal co-doped carbon quantum dot of a kind of copper zinc, with cupric ethylene diamine tetraacetate sodium salt and ethylenediaminetetraacetic acid zinc sodium salt mixt for presoma, through hot polymerization reaction, dissolving, ultrasonic vibration, centrifugation, concentration dialysis be evaporated prepared.
Technical scheme is as follows:
The preparation method of the carbon quantum dot that a kind of copper zinc is metal co-doped, comprises the following steps that
(1), after cupric ethylene diamine tetraacetate sodium and ethylenediaminetetraacetic acid zinc sodium being mixed, under oxygen free condition, it is warming up to 250 DEG C-450 DEG C, isothermal reaction 1-5h, then Temperature fall;
(2) by soluble in water for step (1) reacted material, it is uniformly dispersed, then filters, remove the particle diameter material more than 0.22 μm;
(3) dialysis after solution concentration step (2) obtained, removes small molecular weight impurity, is then evaporated by the solution after dialysis, obtains the carbon quantum dot that solid copper zinc is metal co-doped.
According to the invention it is preferred to, in step (1), the mass ratio of cupric ethylene diamine tetraacetate sodium and ethylenediaminetetraacetic acid zinc sodium is (0.3-1): 1, it is preferred that (0.8-1): 1, it is most preferred that 1:1;
Preferably, the speed of intensification is 1-20 DEG C/min; Make raw material at pre-heat phase not because temperature is too fast under this heating rate, cause raw material drain evaporation, it is ensured that productivity, affect production efficiency without because heating-up temperature is too low;
Preferably, reaction temperature is 300-400 DEG C; Ensure that the generation of carbon quantum dot under this reaction temperature, at too high a temperature, strong hot polymerization will be occurred to react, the matter dimensions of generation is excessive, to such an extent as to reduces the productivity of carbon quantum dot; Ensure copper, Zn complex content in carbon nano-quantum point simultaneously.
According to the invention it is preferred to, in step (2), finely dispersed mode is ultrasonic disperse, and the frequency of ultrasonic disperse is 80-150Hz;
Preferably, the mode of filtration is remove the particle diameter material more than 0.22 μm with the filter membrane of 0.22 μm.
According to the invention it is preferred to, the dialysis described in step (3) is with the bag filter of 3000-4000D, dialysis removal small molecular weight impurity;
Preferably, the temperature being evaporated described in is 50-70 DEG C.
In the present invention, copper, zinc are combined with carbon quantum dot, by both synergism, can effectively strengthen visible light-responded ability and electric transmission efficiency, and then extend its application in photocatalysis oxidation reaction. the present invention adopts the cupric ethylene diamine tetraacetate sodium salt with class Schiff base saturated structures and ethylenediaminetetraacetic acid zinc sodium salt to be organic carbon source, by high temperature hot polymerization reaction preparation good water solubility, uniform particle diameter, fluorescence property is stable, visible light-responded scope is wide, the carbon quantum dot of the hybrid metal doping of high electric transmission efficiency, for photochemical catalytic oxidation 1, 4-dihydropyridine, achieve good effect, the 1 of 93.93% can be will be up to, 4-dihydropyridine is converted into pyridine derivatives, and achieve and react in aqueous, by-product is exactly water and oxygen, reach green photochemical requirement.
The excellent effect of the present invention is as follows:
1, copper, zinc are combined by the present invention with carbon quantum dot, by both synergism, can significantly effectively strengthen visible light-responded ability and electric transmission efficiency, from catalysis 1, the effect of 4-dihydropyridine, the catalytic effect of the carbon quantum dot of hybrid metal doping is than the excellent catalytic effect of single metal carbon quantum dot.
2, copper zinc hybrid metal doping carbon quantum dot of the present invention is in photocatalysis 1, the experiment of 4-dihydropyridine there is good catalytic effect, can by the 1 of 93.93%, 4-dihydropyridine is converted into pyridine derivatives, and achieve and react in aqueous, by-product is only water and oxygen, has reached green photochemical requirement.
3, the present invention optimizes carbon source structure, utilizes one-step method to directly generate the carbon quantum dot of copper, the doping of zinc hybrid metal, saves operation, improve product stability.
Accompanying drawing explanation
Fig. 1 is transmission electron microscope (TEM) figure (a) and the grain size distribution (b) of the metal co-doped carbon quantum dot of copper zinc that embodiment 1 prepares;
Fig. 2 is copper zinc that embodiment 1 prepares metal co-doped carbon quantum dot fluorescence emission spectrogram under different excitation wavelengths;
Fig. 3 is the mechanism figure of the metal co-doped carbon quantum dot catalysis 1,4-dihydropyridine of copper zinc of the present invention; Wherein, CQDs is the carbon quantum dot that copper zinc is metal co-doped, and Isosorbide-5-Nitrae-DHP is Isosorbide-5-Nitrae-dihydropyridine;
Fig. 4 is Cu in the carbon quantum dot that copper zinc that embodiment 1 prepares is metal co-doped2+Electron spin resonance (ESR) figure (a) and Zn1+ESR figure (b);
Fig. 5 is Cu in the carbon quantum dot that in test example 2, after addition 1,4-dihydropyridine, copper zinc is metal co-doped2+ESR scheme (a) and Zn1+ESR figure (b);
Fig. 6 is the uv absorption spectra of the metal co-doped carbon quantum dot of copper zinc that in test example 1, embodiment 1 prepares;
Fig. 7 is the catalytic curve figure of quantum dot catalysis 1,4-dihydropyridine in test example 2.
Detailed description of the invention
Below by specific embodiment and in conjunction with accompanying drawing, the present invention will be further described, but is not limited to this.
Embodiment 1
The preparation method of the carbon quantum dot that a kind of copper zinc is metal co-doped, comprises the following steps that
(1) weigh cupric ethylene diamine tetraacetate sodium salt to tile in quartz boat uniformly with ethylenediaminetetraacetic acid zinc sodium salt 3.0g (mass ratio of cupric ethylene diamine tetraacetate sodium salt and ethylenediaminetetraacetic acid zinc sodium salt is 1:1) altogether, then quartz boat is put in tubular heater. N2Bubbling 30min, drives away the oxygen in pipe. After 30min, start heater, carry out, with the rate of heat addition of 5 DEG C/min, the heating that heats up. After being warming up to 350 DEG C, maintain constant temperature 5h, then Temperature fall, take out after being down to room temperature.
(2) step (1) reacted sample is dissolved in 100mL water, the ultrasonic vibration instrument of 100Hz carries out the ultrasonic vibration effect of 20min, make part soluble in water be completely dissolved. Then it is filtered processing with the filter membrane of 0.22 μm, removes the material more than 0.22 μm.
(3), after liquid concentration step (2) obtained, the bag filter of 3500D carries out dialysis treatment. The partial salts and small molecular weight impurity that contain in carbon quantum dot solution is removed by dialysing. Solution after dialysis is evaporated in the baking oven of 50 DEG C, obtains the carbon quantum dot that solid copper zinc is metal co-doped.
The transmission electron microscope picture of the metal co-doped carbon quantum dot of copper zinc that the present embodiment prepares is such as shown in Fig. 1 (a), and grain size distribution is such as shown in Fig. 1 (b). As shown in Figure 1, the carbon quantum dot of copper zinc hybrid metal doping, size uniformity, average-size is 2.2nm, it is observed that the spacing of lattice of carbon quantum dot under high power transmission electron microscope, being approximately 0.2nm, this matches with (002) diffraction crystal face of Graphene.
Cu in the metal co-doped carbon quantum dot of copper zinc that the present embodiment prepares2+Electron spin resonance (ESR) figure such as shown in Fig. 4 (a), Zn1+ESR scheme as shown in Fig. 4 (b). As shown in Figure 4, copper zinc hybrid metal doping carbon quantum dot after illumination, Cu2+And Zn1+Signal decline, this is because Cu2+It is reduced to Cu1+, it is difficult to be oxidized to Cu0, and Zn1+It is oxidized to Zn2+。
Embodiment 2
The preparation method of the carbon quantum dot that a kind of copper zinc is metal co-doped, comprises the following steps that
(1) weigh cupric ethylene diamine tetraacetate sodium salt to tile in quartz boat uniformly with ethylenediaminetetraacetic acid zinc sodium salt 3.0g (mass ratio of cupric ethylene diamine tetraacetate sodium salt and ethylenediaminetetraacetic acid zinc sodium salt is 0.5:1) altogether, then quartz boat is put in tubular heater.N2Bubbling 30min, drives away the oxygen in pipe. After 30min, start heater, carry out, with the rate of heat addition of 1 DEG C/min, the heating that heats up. After being warming up to 250 DEG C, maintain constant temperature 2h, then Temperature fall, take out after being down to room temperature.
(2) step (1) reacted sample is dissolved in 100mL water, the ultrasonic vibration instrument of 80Hz carries out the ultrasonic vibration effect of 20min, make part soluble in water be completely dissolved. Then it is filtered processing with the filter membrane of 0.22 μm, removes the material more than 0.22 μm.
(3), after liquid concentration step (2) obtained, the bag filter of 3000D carries out dialysis treatment. The partial salts and small molecular weight impurity that contain in carbon quantum dot solution is removed by dialysing. Solution after dialysis is evaporated in the baking oven of 50 DEG C, obtains the carbon quantum dot that solid copper zinc is metal co-doped.
Embodiment 3
The preparation method of the carbon quantum dot that a kind of copper zinc is metal co-doped, comprises the following steps that
(1) weigh cupric ethylene diamine tetraacetate sodium salt to tile in quartz boat uniformly with ethylenediaminetetraacetic acid zinc sodium salt 3.0g (mass ratio of cupric ethylene diamine tetraacetate sodium salt and ethylenediaminetetraacetic acid zinc sodium salt is 0.8:1) altogether, then quartz boat is put in tubular heater. N2Bubbling 30min, drives away the oxygen in pipe. After 30min, start heater, carry out, with the rate of heat addition of 10 DEG C/min, the heating that heats up. After being warming up to 400 DEG C, maintain constant temperature 2h, then Temperature fall, take out after being down to room temperature.
(2) step (1) reacted sample is dissolved in 100mL water, the ultrasonic vibration instrument of 120Hz carries out the ultrasonic vibration effect of 20min, make part soluble in water be completely dissolved. Then it is filtered processing with the filter membrane of 0.22 μm, removes the material more than 0.22 μm.
(3), after liquid concentration step (2) obtained, the bag filter of 4000D carries out dialysis treatment. The partial salts and small molecular weight impurity that contain in carbon quantum dot solution is removed by dialysing. Solution after dialysis is evaporated in the baking oven of 70 DEG C, obtains the carbon quantum dot that solid copper zinc is metal co-doped.
Comparative example 1
The preparation method of the carbon quantum dot that copper zinc as described in Example 1 is metal co-doped, the difference is that:
In step (1), the mass ratio of cupric ethylene diamine tetraacetate sodium salt and ethylenediaminetetraacetic acid zinc sodium salt is 2:1.
Comparative example 2
The preparation method of the carbon quantum dot that copper zinc as described in Example 1 is metal co-doped, the difference is that:
Step (1) only uses 3g ethylenediaminetetraacetic acid zinc sodium salt.
Comparative example 3
The preparation method of the carbon quantum dot that copper zinc as described in Example 1 is metal co-doped, the difference is that:
Step only uses 3g disodium edta in (1).
Comparative example 4
The preparation method of the carbon quantum dot that copper zinc as described in Example 1 is metal co-doped, the difference is that:
Step (1) only uses 3g cupric ethylene diamine tetraacetate sodium salt.
Test example 1
The uv absorption spectra of the carbon quantum dot that copper zinc that testing example 1,2 and comparative example 1 prepare is metal co-doped, as shown in Figure 6, as shown in Figure 6, the carbon quantum dot of copper zinc metal mixed doping has very wide absworption peak from 300nm to 600nm, when copper zinc ratio is 1:1, absorb the strongest, be mainly due to π → π * transition of graphite-structure.
Test example 2
The quantum dot that embodiment 1-3 and comparative example 1-4 prepares is used for photocatalysis Isosorbide-5-Nitrae-dihydropyridine experiment, and step is as follows:
The solid sample taking 3mg is dissolved in the mixed solution of 20mL water/ethanol, and through the illumination of 90min, test substrate is by the efficiency of catalytic oxidation, and result is as shown in table 1.
By Cu after carbon quantum dot addition 1,4-dihydropyridine metal co-doped for copper zinc prepared for embodiment 12+ESR scheme as shown in Fig. 5 (a), Zn1+ESR scheme as shown in Fig. 5 (b); As shown in Figure 5, after illumination, Zn1+Signal increase, Cu2+Signal be held essentially constant. It is by Zn2+React with Isosorbide-5-Nitrae-dihydropyridine, generate Zn1+Caused by.
Table 1
As shown in Table 1, embodiment 1-3 substantially catalytic efficiency than comparative example 1-4 is high.
By the Plotting data curve of quantum dot catalysis Isosorbide-5-Nitrae-dihydropyridine that embodiment 1-2 and comparative example 1 prepare, as shown in Figure 7. As shown in Figure 7, embodiment 1-2 is substantially high than the catalytic efficiency of comparative example 1.
Claims (10)
1. a preparation method for the carbon quantum dot that copper zinc is metal co-doped, comprises the following steps that
(1), after cupric ethylene diamine tetraacetate sodium and ethylenediaminetetraacetic acid zinc sodium being mixed, under oxygen free condition, it is warming up to 250 DEG C-450 DEG C, isothermal reaction 1-5h, then Temperature fall;
(2) by soluble in water for step (1) reacted material, it is uniformly dispersed, then filters, remove the particle diameter material more than 0.22 μm;
(3) dialysis after solution concentration step (2) obtained, removes small molecular weight impurity, is then evaporated by the solution after dialysis, obtains the carbon quantum dot that solid copper zinc is metal co-doped.
2. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that in step (1), the mass ratio of cupric ethylene diamine tetraacetate sodium and ethylenediaminetetraacetic acid zinc sodium is (0.3-1): 1.
3. the preparation method of the carbon quantum dot that copper zinc according to claim 2 is metal co-doped, it is characterised in that in step (1), the mass ratio of cupric ethylene diamine tetraacetate sodium and ethylenediaminetetraacetic acid zinc sodium is (0.8-1): 1.
4. the preparation method of the carbon quantum dot that copper zinc according to claim 2 is metal co-doped, it is characterised in that in step (1), the mass ratio of cupric ethylene diamine tetraacetate sodium and ethylenediaminetetraacetic acid zinc sodium is 1:1.
5. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that the speed heated up in step (1) is 1-20 DEG C/min.
6. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that in step (1), reaction temperature is 300-400 DEG C.
7. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that in step (2), finely dispersed mode is ultrasonic disperse, the frequency of ultrasonic disperse is 80-150Hz.
8. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that the mode filtered in step (2) is remove the particle diameter material more than 0.22 μm with the filter membrane of 0.22 μm.
9. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that the dialysis described in step (3) is with the bag filter of 3000-4000D.
10. the preparation method of the carbon quantum dot that copper zinc according to claim 1 is metal co-doped, it is characterised in that the temperature being evaporated described in step (3) is 50-70 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057694A (en) * | 2017-06-13 | 2017-08-18 | 中国石油大学(华东) | A kind of carbon quantum dot of unsatuated metal doping and preparation method thereof |
| CN108713591A (en) * | 2018-06-03 | 2018-10-30 | 云南良旺生物科技有限公司 | A kind of zinc doping carbon quantum dot film fruit antistaling agent and its preparation and application |
| CN108822838A (en) * | 2018-05-10 | 2018-11-16 | 昆明理工大学 | The preparation method and application of Copper-cladding Aluminum Bar carbon quantum dot |
| CN110327980A (en) * | 2019-06-18 | 2019-10-15 | 中国石油大学(华东) | A kind of application of metal-doped carbon quantum dot |
| CN111518542A (en) * | 2020-05-28 | 2020-08-11 | 河南大学 | Synthesis method and application of zinc-doped carbon dots with high quantum yield |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107287A (en) * | 2013-02-19 | 2013-05-15 | 中国科学院理化技术研究所 | Application of heteroatom doped carbon quantum dot in solar cell |
| CN103172051A (en) * | 2013-04-16 | 2013-06-26 | 苏州大学 | Water-soluble carbon quantum dot and preparation method thereof |
| US20150023858A1 (en) * | 2013-07-18 | 2015-01-22 | William Marsh Rice University | Rebar hybrid materials and methods of making the same |
| CN105131948A (en) * | 2015-08-13 | 2015-12-09 | 中国石油大学(北京) | Metal doped carbon points with high fluorescence quantum yield and preparation method and application thereof |
-
2016
- 2016-03-21 CN CN201610162335.2A patent/CN105664955B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107287A (en) * | 2013-02-19 | 2013-05-15 | 中国科学院理化技术研究所 | Application of heteroatom doped carbon quantum dot in solar cell |
| CN103172051A (en) * | 2013-04-16 | 2013-06-26 | 苏州大学 | Water-soluble carbon quantum dot and preparation method thereof |
| US20150023858A1 (en) * | 2013-07-18 | 2015-01-22 | William Marsh Rice University | Rebar hybrid materials and methods of making the same |
| CN105131948A (en) * | 2015-08-13 | 2015-12-09 | 中国石油大学(北京) | Metal doped carbon points with high fluorescence quantum yield and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| WENTING WU ET AL: "Cu–N Dopants Boost Electron Transfer and Photooxidation Reactions of Carbon Dots", 《ANGEW.CHEM.INT.ED.》 * |
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| CN107057694A (en) * | 2017-06-13 | 2017-08-18 | 中国石油大学(华东) | A kind of carbon quantum dot of unsatuated metal doping and preparation method thereof |
| CN108822838A (en) * | 2018-05-10 | 2018-11-16 | 昆明理工大学 | The preparation method and application of Copper-cladding Aluminum Bar carbon quantum dot |
| CN108822838B (en) * | 2018-05-10 | 2021-03-02 | 昆明理工大学 | Preparation method and application of copper-doped carbon quantum dots |
| CN108713591A (en) * | 2018-06-03 | 2018-10-30 | 云南良旺生物科技有限公司 | A kind of zinc doping carbon quantum dot film fruit antistaling agent and its preparation and application |
| CN108713591B (en) * | 2018-06-03 | 2022-01-14 | 云南良旺生物科技有限公司 | Zinc-doped carbon quantum dot coating fruit preservative and preparation and use methods thereof |
| CN110327980A (en) * | 2019-06-18 | 2019-10-15 | 中国石油大学(华东) | A kind of application of metal-doped carbon quantum dot |
| WO2020252847A1 (en) * | 2019-06-18 | 2020-12-24 | 中国石油大学(华东) | Application of metal-doped carbon quantum dots |
| CN111518542A (en) * | 2020-05-28 | 2020-08-11 | 河南大学 | Synthesis method and application of zinc-doped carbon dots with high quantum yield |
| CN111518542B (en) * | 2020-05-28 | 2021-07-30 | 河南大学 | Synthesis method and application of zinc-doped carbon dots with high quantum yield |
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