CN110201658B - Preparation method of titanium oxide nanoparticle/multilayer graphene composite material - Google Patents
Preparation method of titanium oxide nanoparticle/multilayer graphene composite material Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 60
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002105 nanoparticle Substances 0.000 title claims abstract description 19
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 19
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 21
- 239000010439 graphite Substances 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 17
- 239000002904 solvent Substances 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 238000009210 therapy by ultrasound Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 18
- 230000009471 action Effects 0.000 abstract description 5
- 125000000524 functional group Chemical group 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000012046 mixed solvent Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000004408 titanium dioxide Substances 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- B01J35/39—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
Abstract
The invention discloses a preparation method of a titanium oxide nanoparticle/multilayer graphene composite material, which comprises the steps of taking nano titanium oxide particles as a raw material, adding nano titanium oxide into a mixed solution of DMF (dimethyl formamide) and water, adding a dilute nitric acid solution, generating organic functional groups on the surface of the nano titanium oxide under the condition of 80 ℃ water bath, and uniformly depositing the nano titanium oxide on the surface of multilayer graphene under the action of the surface molecular force of the multilayer graphene to finally obtain the uniformly-compounded titanium oxide nanoparticle/multilayer graphene composite material. The preparation process is simple and suitable for industrial production.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a preparation method of a titanium oxide nanoparticle/multilayer graphene composite material. The material of the invention has potential application in the fields of photocatalysis, environmental management, energy storage and the like.
Background
Nano TiO22The particles can be used as catalysts, energy storage materials, pigments and the like. But nano TiO2Small particles, large surface area and easy agglomeration to cause failure. Thus, nano TiO is mixed2Loaded on other carriers and capable of retaining TiO2The dispersibility of (2) and the service life of (3) are improved. Graphene is a good carrier, and has a very stable structure, excellent electric transport properties, mechanical properties and surface chemical properties.
Currently, graphene and TiO2The main preparation methods of the composition include an in-situ preparation method and a physical mixing method. The in-situ preparation mainly adopts a hydrothermal method and a sol-gel method, metal ions in a solution are adsorbed to the surface of graphene oxide, and the composite material is obtained through heating treatment, but the preparation efficiency of the currently adopted method is low. The adopted physical mixing method is to mix nano TiO2Mixing with graphene oxide in solution by simple stirring to obtain nano TiO2The dispersibility of the particles and the graphene is not high. And the preparation cost of the graphene oxide is high, and the pollution to the environment is large.
Aiming at the defects in the prior art, the invention provides a technical scheme to solve the technical problems in the prior art.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides a preparation method of a titanium oxide nanoparticle/multilayer graphene composite material, which adopts a simple preparation process to prepare nano TiO2The particles are uniformly distributed on the multilayer graphene.
In order to solve the technical problems in the prior art, the technical scheme of the invention is as follows:
a preparation method of a titanium oxide nanoparticle/multilayer graphene composite material comprises the following steps:
step S10, measuring DMF and deionized water in a volume ratio of 8:2, and uniformly mixing the DMF and the deionized water to obtain a mixed solvent A;
s20, weighing expanded graphite, adding the weighed expanded graphite into the mixed solvent A, and performing ultrasonic treatment for 3 hours to obtain a multilayer graphene dispersion liquid C, wherein the concentration of the expanded graphite relative to the solvent A is 0.5-2 mg/mL;
step S30, preparing 2mol/L dilute nitric acid solution called B solution;
step S40, weighing nanometer titanium dioxide TiO powder2Adding the titanium dioxide powder into the solution C, and carrying out ultrasonic treatment for 4 hours, wherein the concentration of the titanium dioxide powder relative to the solvent A is 3-6 mg/mL; measuring solution B, adding the solution B into solution C, wherein the volume ratio of the solution B to the solvent A is 0.5-1: 1; putting the solution C into a water bath at the temperature of 80 ℃, magnetically stirring and reacting for 5-10 hours at the rotating speed of 300 revolutions per minute;
step S50, cooling the solution C, and then performing centrifugal cleaning, wherein the centrifugal cleaning adopts 3 times of deionized water and 3 times of alcohol centrifugal cleaning, and the speed of a centrifugal machine is 6000 r/min; and drying the titanium dioxide nano particles in an oven at 70 ℃ for 24 hours to obtain the titanium dioxide nano particle/multilayer graphene composite material.
As a further improvement scheme, the multilayer graphene is used as a substrate, and the nano TiO is used as2The particles are uniformly distributed on the surface of the multilayer graphene; wherein, TiO2The size of the nano particles is below 50 nm, and TiO2The particles have voids between them.
As a further improvement, in the step S40, the nano titanium oxide generates a certain hydrolysis under the action of acid conditions and nitrate radical and generates a complexing action with nitrate radical and DMF, so that a functional group is generated on the surface of TiO 2; the TiO2 with organic functional groups is adsorbed by the multilayer graphene by molecular force and deposited on the surface of the multilayer graphene.
In the technical scheme, the molecular force on the surface of the multilayer graphene is uniform, so that the distribution of the nano titanium oxide is relatively uniform. Meanwhile, the action force of the molecular force is small, and only a small amount of nano titanium oxide particles can be adsorbed, so that the nano titanium oxide is not easy to accumulate.
Compared with the prior art, the invention has the following beneficial effects:
(1) nano TiO22The particles can be obtained by any method, including the market purchase, and the nano TiO is currently used2The commercial price of (A) is not high.
(2) The preparation of the substrate multilayer graphene is simple, the cost is low, and TiO can be deposited without activating the surface of the multilayer graphene2And (3) nanoparticles.
(3) Due to the preparation principle of the invention, the obtained nano TiO2All deposited on the surface of multilayer graphene, TiO2TiO is uniformly distributed on the surface of the multilayer graphene2With a certain gap in between. The concrete implementation is as preparation step S40.
(4) The method has the advantages of simple process, high preparation efficiency, easy control and convenient industrial production.
Drawings
FIG. 1 shows TiO homogeneously distributed on multilayer graphene of example 1 of the present invention2A flow chart of the steps of a method of making a particle;
FIG. 2 is a comparative photograph of a real photograph after standing for 24 hours after the completion of the reaction without adding nitric acid
FIG. 3 shows TiO homogeneously distributed on multilayer graphene according to example 1 of the present invention2XRD pattern of the preparation method of the particles;
FIG. 4 shows TiO homogeneously distributed on multilayer graphene according to example 1 of the present invention2GranulesScanning electron microscope images of the preparation method of (1);
FIG. 5 shows TiO homogeneously distributed on multilayer graphene according to example 1 of the present invention2High power scanning electron micrographs of the method of preparation of the particles;
Detailed Description
In order to better explain the process and scheme of the present invention, the following invention is further described with reference to the accompanying drawings and examples. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
In order to solve the technical problems in the prior art, referring to fig. 1, the invention provides a nano TiO2The preparation method for uniformly distributing the particles on the multilayer graphene comprises the following steps:
and S10, weighing DMF (dimethyl formamide) and deionized water in a volume ratio of 8:2, and uniformly mixing to obtain the mixed solvent A.
S20, weighing expanded graphite, adding the expanded graphite into the mixed solvent A, and performing ultrasonic treatment for 3 hours to obtain a multilayer graphene dispersion liquid C, wherein the concentration of the expanded graphite relative to the solvent A is 0.5-2 mg/mL.
S30, preparing a 2mol/L dilute nitric acid solution called as a B solution.
S40, weighing titanium oxide powder, adding the titanium oxide powder into the solution C, and carrying out ultrasonic treatment for 4 hours, wherein the concentration of the titanium oxide powder relative to the solvent A is 3-6 mg/mL; measuring solution B, adding the solution B into solution C, wherein the volume ratio of the solution B to the solvent A is 0.5-1: 1; and (3) putting the solution C into a water bath at the temperature of 80 ℃, and reacting for 5-10 hours by magnetic stirring at the rotating speed of 300 revolutions per minute.
S50, cooling the solution C, and then performing centrifugal cleaning, wherein the centrifugal cleaning adopts 3 times of deionized water and 3 times of alcohol centrifugal cleaning, and the speed of a centrifugal machine is 6000 r/min; and drying the titanium oxide nano particles in an oven at 70 ℃ for 24 hours to obtain the titanium oxide nano particle/multilayer graphene composite material.
In the technical scheme, the nano titanium oxide generates certain hydrolysis under the acidic condition and the action of nitrate radical and generates complexation with nitrate radical and DMF, so that functional groups are generated on the surface of TiO 2; the TiO2 with organic functional groups is adsorbed by the multilayer graphene by molecular force and deposited on the surface of the multilayer graphene. The molecular force on the surface of the multilayer graphene is uniform, so that the distribution of the nano titanium oxide is relatively uniform. Meanwhile, the action force of the molecular force is small, and only a small amount of nano titanium oxide particles can be adsorbed, so that the nano titanium oxide is not easy to accumulate.
EXAMPLE 1
And uniformly mixing 8ml of DMF (dimethyl formamide) and 2ml of distilled water to obtain a mixed solvent A, weighing 20mg of expanded graphite, adding the expanded graphite into the mixed solvent A, and carrying out ultrasonic oscillation for 3 hours to ensure that the expanded graphite is stripped into multilayer graphene which is uniformly dispersed in the solvent, thereby obtaining the multilayer graphene dispersion liquid. And adding 60mg of commercially available nano titanium dioxide powder into the multilayer graphene dispersion liquid, wherein the diameter of the nano titanium dioxide powder is 40 nm. Then ultrasonic treatment is carried out for 4 hours, 10ml of dilute nitric acid with the concentration of 2mol/L is added, and then water bath stirring is carried out for 10 hours at the temperature of 80 ℃ and the rotating speed of 300 r/min.
A photograph of a real object obtained by leaving the reaction flask after cooling for 10 hours is shown in FIG. 2A, and it can be seen that no white TiO was present2Delamination appeared, indicating TiO2Has been loaded onto the surface of multilayer graphene. To examine the effect of nitric acid, a comparative experiment was conducted without adding nitric acid, and a photograph of a real object after standing was shown in FIG. 2B, in which a distinct white layer was observed, which was TiO added initially2To illustrate, nano TiO without adding dilute nitric acid2Cannot be adsorbed to the surface of multilayer graphene.
The product after reaction is processed by deionized water 3 times and alcohol 3 times for centrifugal cleaning, and after cleaning, the product is placed in an oven to be dried for 24 hours at 70 ℃ to obtain dried nano TiO2A particulate/multilayer graphene composite powder.
XRD (X-ray diffraction) test is carried out on the prepared composite material powder, and the result is shown in figure 2, wherein multilayer graphene and TiO can be seen from the figure2No other phases were found, indicating that only multilayer graphene and TiO were present in the prepared product2Two phases.
The composite material powder prepared was subjected to SEM observation, and fig. 3 is an XRD chart, and fig. 4 and 5 are SEM images at different magnifications. From the figure, TiO can be found2Has small particle size of about 40nm and is suitable for multilayer grapheneThe surface is uniformly distributed.
Instantiation 2
Uniformly mixing 8ml of DMF (dimethyl formamide) and 2ml of distilled water to obtain a mixed solvent A, weighing 5mg of expanded graphite, adding the expanded graphite into the mixed solvent A, and carrying out ultrasonic oscillation for 3 hours to ensure that the expanded graphite is stripped into multilayer graphene which is uniformly dispersed in the solvent, thereby obtaining the multilayer graphene dispersion liquid. Adding 60mg of titanium dioxide powder into the multilayer graphene dispersion liquid, performing ultrasonic treatment for 4 hours, adding 10ml of dilute nitric acid with the concentration of 2mol/L, and performing water bath stirring for 10 hours at 80 ℃ and at the rotating speed of 300 revolutions per minute. Cooling, centrifugally cleaning to collect black product, centrifugally cleaning with deionized water for 3 times and alcohol for 3 times, drying at 70 deg.C for 24 hr in oven, and drying to obtain nanometer TiO2The particles are loaded on the composite material of the multilayer graphene.
Instantiation 3
Uniformly mixing 8ml of DMF (dimethyl formamide) and 2ml of distilled water to obtain a mixed solvent A, weighing 15mg of expanded graphite, adding the expanded graphite into the mixed solvent A, and carrying out ultrasonic oscillation for 3 hours to ensure that the expanded graphite is stripped into multilayer graphene which is uniformly dispersed in the solvent, thereby obtaining the multilayer graphene dispersion liquid. Adding 30mg of titanium dioxide powder into the multilayer graphene dispersion liquid, performing ultrasonic treatment for 4 hours, adding 5ml of dilute nitric acid with the concentration of 2mol/L, and performing water bath stirring for 10 hours at 80 ℃ and at the rotating speed of 300 revolutions per minute. Cooling, centrifugally cleaning to collect black product, centrifugally cleaning with deionized water for 3 times and alcohol for 3 times, drying at 70 deg.C for 24 hr in oven, and drying to obtain nanometer TiO2The particles are loaded on the multilayer graphene composite material.
Instantiation 4
Uniformly mixing 8ml of DMF (dimethyl formamide) and 2ml of distilled water to obtain a mixed solvent A, weighing 15mg of expanded graphite, adding the expanded graphite into the mixed solvent A, and carrying out ultrasonic oscillation for 3 hours to ensure that the expanded graphite is stripped into multilayer graphene which is uniformly dispersed in the solvent, thereby obtaining the multilayer graphene dispersion liquid. Adding 45mg of titanium dioxide powder into the multilayer graphene dispersion liquid, performing ultrasonic treatment for 4 hours, adding 10ml of dilute nitric acid with the concentration of 2mol/L, and performing water bath stirring for 10 hours at 80 ℃ and at the rotating speed of 300 revolutions per minute. Cooling, centrifuging, collecting black product for 3 timesDeionized water, 3 times alcohol centrifugal cleaning, placing in an oven for drying at 70 ℃ for 24 hours after cleaning, and obtaining the nano TiO after drying2The particles are loaded on the multilayer graphene composite material.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A preparation method of a titanium oxide nanoparticle/multilayer graphene composite material is characterized by comprising the following steps:
step S10, measuring DMF and deionized water in a volume ratio of 8:2, and uniformly mixing the DMF and the deionized water to obtain a solvent A;
s20, weighing expanded graphite, adding the weighed expanded graphite into a solvent A, and performing ultrasonic treatment for 3 hours to obtain a multilayer graphene dispersion liquid C solution, wherein the concentration of the expanded graphite relative to the solvent A is 0.5-2 mg/mL;
step S30, preparing 2mol/L dilute nitric acid solution called B solution;
step S40, weighing nano titanium dioxide powder, adding the nano titanium dioxide powder into the solution C, and carrying out ultrasonic treatment for 4 hours, wherein the concentration of the nano titanium dioxide powder relative to the solvent A is 3-6 mg/mL; measuring solution B, adding the solution B into the solution containing the nano titanium dioxide powder, wherein the volume ratio of the solution B to the solvent A is 0.5-1: 1; putting the obtained solution into a water bath at the temperature of 80 ℃ for magnetic stirring reaction for 5-10 hours, wherein the stirring speed is 300 r/min;
step S50, cooling the solution obtained in the step S40, and then carrying out centrifugal cleaning, wherein the centrifugal cleaning adopts 3 times of deionized water and 3 times of alcohol centrifugal cleaning, and the speed of a centrifugal machine is 6000 revolutions per minute; placing the titanium oxide nano particles in an oven to dry for 24 hours at 70 ℃, and drying to obtain the titanium oxide nano particles/multilayer graphene composite material;
the multilayer graphene is used as a substrate, and titanium oxide nano particles are uniformly distributed on the surface of the multilayer graphene; wherein the size of the titanium oxide nano particles is below 50 nanometers, and gaps are arranged among the titanium oxide nano particles.
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| CN112071507A (en) * | 2020-09-08 | 2020-12-11 | 杭州梵云新材料科技有限公司 | Copper-coated multilayer graphene composite material and preparation method thereof |
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| CN102350334A (en) * | 2011-08-08 | 2012-02-15 | 江苏大学 | Graphene/mesoporous titanium dioxide visible light catalyst and preparation method |
| CN107199029A (en) * | 2017-06-08 | 2017-09-26 | 攀枝花学院 | The preparation method of high efficiency photocatalysis nanometer titanium dioxide/graphene composite |
| CN109216670A (en) * | 2018-08-06 | 2019-01-15 | 杭州电子科技大学 | A kind of nano SnO2Particle/multi-layer graphene composite material and preparation method |
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| CN102350334A (en) * | 2011-08-08 | 2012-02-15 | 江苏大学 | Graphene/mesoporous titanium dioxide visible light catalyst and preparation method |
| CN107199029A (en) * | 2017-06-08 | 2017-09-26 | 攀枝花学院 | The preparation method of high efficiency photocatalysis nanometer titanium dioxide/graphene composite |
| CN109216670A (en) * | 2018-08-06 | 2019-01-15 | 杭州电子科技大学 | A kind of nano SnO2Particle/multi-layer graphene composite material and preparation method |
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