CN108671907B - Platinum/titanium dioxide nanoflower composite material and preparation method and application thereof - Google Patents
Platinum/titanium dioxide nanoflower composite material and preparation method and application thereof Download PDFInfo
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 176
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 84
- 239000002057 nanoflower Substances 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 229910003446 platinum oxide Inorganic materials 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
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- 239000000463 material Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000001257 hydrogen Substances 0.000 claims description 25
- 229910052739 hydrogen Inorganic materials 0.000 claims description 25
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 14
- 229910021641 deionized water Inorganic materials 0.000 claims description 14
- 239000002135 nanosheet Substances 0.000 claims description 14
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- POILWHVDKZOXJZ-ARJAWSKDSA-M (z)-4-oxopent-2-en-2-olate Chemical compound C\C([O-])=C\C(C)=O POILWHVDKZOXJZ-ARJAWSKDSA-M 0.000 claims description 10
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 claims description 10
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 10
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 24
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
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- 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 4
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- IYVLHQRADFNKAU-UHFFFAOYSA-N oxygen(2-);titanium(4+);hydrate Chemical compound O.[O-2].[O-2].[Ti+4] IYVLHQRADFNKAU-UHFFFAOYSA-N 0.000 description 2
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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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- 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—
-
- B01J35/39—
Abstract
The invention discloses a preparation method of a platinum/titanium dioxide nanoflower composite material, which is prepared by compounding titanium dioxide nanoflowers and platinum nanoparticles, wherein the titanium dioxide nanoflowers have large specific surface area and are rich in a large number of oxygen vacancies. The platinum nano-particles are uniformly deposited on the surface of the nanometer dioxide flower by utilizing the reducibility of oxygen vacancies, and the two are in close interface contact. The platinum/titanium dioxide nanoflower composite material is an efficient and stable photoelectric conversion material, a one-step simple reduction method is adopted, no reducing agent is involved in the platinum ion reduction process, and the preparation method is simple to operate, environment-friendly, mild in reaction condition, low in energy consumption and easy to popularize and use.
Description
Technical Field
The invention belongs to the technical field of nano materials and photocatalysis, and relates to a composite material for depositing platinum nano particles on the surface of a titanium dioxide nanoflower, and a preparation method and application thereof.
Background
The photocatalysis is a new advanced oxidation-reduction technology, has the advantages of low energy consumption, simple operation, no toxicity, no harm, no secondary pollution and the like, and has wide application prospect in the aspects of developing and utilizing solar energy, decomposing aquatic hydrogen by photocatalysis to serve as novel clean energy and the like. With the development of nanotechnology in recent years, semiconductor photocatalysts have attracted great attention.
The traditional titanium dioxide photocatalyst has high chemical stability, light corrosion resistance, strong oxidation capacity, large driving force of photocatalytic reaction and high photocatalytic activity, can realize and accelerate some endothermic chemical reactions on the surface of titanium dioxide irradiated by light, and has no toxicity and low cost, so the photocatalytic research of the titanium dioxide is the most active. However, the titanium dioxide photo-generated carriers are seriously compounded, so that the quantum efficiency of the titanium dioxide photo-generated carriers is low, and the large-scale industrial application of the titanium dioxide photo-catalytic material is limited to a great extent.
The carrier separation efficiency can be improved by loading a small amount of small-size platinum nano particles on the surface of titanium dioxide as a co-catalyst, so that a high-activity photocatalyst is obtained, and the deposited platinum nano particles and the carrier titanium dioxide nano flowers form a tight interface, so that the separation of a photon-generated carrier is improved, and the efficiency of photocatalytic hydrogen production is promoted. Experiments show that the prepared titanium dioxide nanoflower has oxygen vacancy with reducibility, and when the prepared titanium dioxide nanoflower reacts with platinum ions, charge transfer occurs between the titanium dioxide nanoflower and the platinum ions, so that the method for preparing the novel composite material by utilizing the reducibility of the titanium dioxide oxygen vacancy to deposit the platinum nanoparticles in one step can form a compact interface between the platinum nanoparticles and the titanium dioxide, and the amount of the loaded platinum and the size of the platinum particles can be regulated and controlled by the method, so that the photocatalytic hydrogen production efficiency is improved. Compared with the traditional method, the method has the advantages of simple operation, no toxicity, high efficiency, large-area production and the like.
Disclosure of Invention
Aiming at the problems, the invention aims to deposit small-size metal platinum nanoparticles on the surface of the titanium dioxide nanoflower and solve the problem that the photocatalytic hydrogen production efficiency is low because the internal composition of a titanium dioxide photon-generated carrier seriously limits the photocatalytic hydrogen production efficiency in the prior art.
The invention adopts the following technical scheme: a preparation method of a platinum/titanium dioxide nanoflower composite material comprises the following steps:
step 1: adding isopropanol into diethylenetriamine, uniformly stirring, adding diisopropyl di (acetylacetonate) titanate, wherein the volume ratio of the isopropanol to the diethylenetriamine to the diisopropyl di (acetylacetonate) titanate is 1260-2520: 1-10: 45-360, uniformly stirring, pouring into a reaction kettle, carrying out solvent heat treatment for 24-36 hours at the temperature of 200-220 ℃, washing, and drying. And (3) heating the obtained product at the heating rate of 1-10 ℃/min to reach a stable annealing temperature, wherein the annealing temperature is 425 ℃, and the annealing time is 2 hours, so as to obtain the precursor oxygen-rich vacancy titanium dioxide nanoflower material.
Step 2: the load of the platinum nanoparticles is realized by utilizing the reducibility of the oxygen vacancy defects of the titanium dioxide nanoflowers prepared in the step 1, and the method specifically comprises the following steps: uniformly dispersing 100mg of titanium dioxide nanoflower into 50mL of deionized water, adding a chloroplatinic acid solution with the volume of 0.297-0.5 mL and containing 2.97mg of chloroplatinic acid, carrying out water bath reaction at the water bath temperature of 80-100 ℃ for 2-5 hours, washing, and drying to obtain the platinum/titanium dioxide nanoflower composite material.
Further, the reaction temperature in step 1 was 200 ℃ and the reaction time was 24 hours. The volume ratio of isopropanol, diethylenetriamine and diisopropyl bis (acetylacetonate) titanate is 1260:1: 45.
Further, the water bath temperature was 80 ℃ and the reaction time was 2 hours.
The platinum/titanium dioxide nanoflower composite material is characterized in that the titanium dioxide nanoflowers are composed of anatase-phase titanium dioxide nanosheets, and the thickness of each titanium dioxide nanosheet is 2-9 nm. Platinum with the particle size of 2-4 nm is loaded on the surface of the titanium dioxide nanosheet to form a heterojunction structure.
The prepared platinum/titanium dioxide nanoflower composite material is applied as a photocatalyst: the water decomposition hydrogen production, the water decomposition oxygen production, the pollutant degradation, the biological antibiosis, the photoelectric water decomposition, the organic matter synthesis and other nanometer material related application fields.
The invention has the beneficial effects that: the invention provides a preparation method for preparing a novel composite material by depositing small-size platinum nano-particles on the surface of a titanium dioxide nanoflower in one step by utilizing the reducibility of oxygen vacancies rich in the titanium dioxide nanoflower. The titanium dioxide nanoflower is formed by self-assembly of ultrathin nanosheets, and has a large specific surface area and a three-dimensional hierarchical structure. The nano material has a large number of active sites due to the special high specific surface area and three-dimensional structure, can rapidly transfer photoelectrons and simultaneously increase the multiple scattering performance of light, and further improves the photocatalytic hydrogen production efficiency. Meanwhile, the oxygen vacancy has reducibility, and when the oxygen vacancy and platinum ions are subjected to oxidation-reduction reaction, charge transfer occurs between the oxygen vacancy and the platinum ions, so that the method for preparing the novel composite material by utilizing the titanium dioxide oxygen vacancy reducibility one-step deposition of the platinum nano particles can obtain a compact noble metal platinum and titanium dioxide nanoflower interface, and in addition, the deposited platinum nano particles have lower hydrogen production overpotential, higher catalytic activity and photo-generated carrier separation performance brought by a smaller size, so that the platinum/titanium dioxide nanoflower composite material prepared by the method has excellent photocatalytic hydrogen production performance under a simulated light source. The method can also control the platinum loading amount and the size of the platinum nano particles, improve the photocatalytic hydrogen production performance, has low production cost and simple preparation process, and is beneficial to industrial production; the invention greatly reduces the production cost of the photocatalyst, obviously improves the photocatalytic hydrogen production efficiency, and has great application prospect.
Drawings
Fig. 1 is a Scanning Electron Microscope (SEM) image of the platinum/titanium dioxide nanoflower composite prepared in example 1.
Fig. 2 and 3 are Transmission Electron Micrographs (TEMs) of the platinum/titanium dioxide nanoflower composite prepared in example 1.
Fig. 4 is an X-ray diffraction pattern (XRD) of the platinum/titanium dioxide nanoflower composite prepared in example 1.
FIG. 5 is a graph showing the hydrogen production by hydrolysis of the platinum/titanium dioxide nanoflower composite prepared in example 3 as a photocatalyst.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following examples. The following examples are intended to illustrate the present invention, but not to limit the present invention, and any modifications and changes made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Example 1:
step 1: to 31.5mL of isopropyl alcohol was added 0.025mL of diethylenetriamine (EDTA), and the mixture was stirred for 10 min. To the solution was added 1.125mL of diisopropyl di (acetylacetonate) titanate. Stirring was continued for 10 min. The obtained mixed solution was poured into a reaction vessel and solvent-heat treated at 200 ℃ for 24 hours. And after the reaction is finished, washing the precipitate for three times by using deionized water and absolute ethyl alcohol respectively, placing the washed precipitate in a 60 ℃ oven, drying the washed precipitate for 24 hours, finally placing the reactant in a muffle furnace, heating the reactant at the speed of 1 ℃/min and the temperature of 425 ℃, and annealing the reactant for 2 hours to obtain the precursor titanium dioxide nanoflower material.
Step 2: 100mg of the precursor titanium dioxide nanoflower is added into 50mL of deionized water, and 0.297mL of chloroplatinic acid solution containing 2.97mg of chloroplatinic acid is added. The temperature of the solution water bath was kept at 80 ℃ and the reaction time was 2 hours. And after the reaction is finished, washing the precipitate with deionized water and absolute ethyl alcohol for three times respectively, and drying at 60 ℃ for 24 hours to obtain the platinum/titanium dioxide nanoflower composite material.
FIG. 1 is a Scanning Electron Microscope (SEM) of the composite material prepared in example 1, from which it can be clearly seen that the platinum/titanium dioxide nanoflowers have a size of 500-1000 nm and are formed by self-assembly of ultra-thin titanium dioxide nanosheets having a thickness of 2-9 nm.
Fig. 2 and 3 are Transmission Electron Micrographs (TEM) of the composite material prepared in example 1, from which it can be seen that platinum nanoparticles are uniformly dispersed on the titanium dioxide nanoflowers to form a heterojunction structure, and the particle size of the platinum nanoparticles is 2 to 4 nm.
FIG. 4 is an X-ray diffraction pattern (XRD) of the composite material prepared in example 1, from which it can be seen that the XRD pattern of the material and standard anatase phase TiO2The characteristic peaks of (a) coincide.
Under a full spectrum, 50mg of the platinum/titanium dioxide nanoflower composite material prepared in the embodiment is ultrasonically dispersed in 100mL of 30% (v/v) methanol solution, a reaction device is vacuumized and placed under a simulated light source, samples are taken every half hour, and gas is detected by gas chromatography. Therefore, a hydrogen production curve graph (figure 5) of the platinum/titanium dioxide nanoflower composite material for photocatalytic water decomposition under a simulated light source is drawn, and the graph shows that the platinum/titanium dioxide nanoflower composite material for photocatalytic water decomposition under the simulated light source shows a good hydrogen production effect. The light irradiation was carried out for 2.5 hours, and the hydrogen production amount was 34.5 mmol/g.
Example 2:
step 1: to 31.5mL of isopropyl alcohol was added 0.025mL of diethylenetriamine (EDTA), and the mixture was stirred for 10 min. To the solution was added 1.125mL of diisopropyl di (acetylacetonate) titanate. Stirring was continued for 10 min. The obtained mixed solution was poured into a reaction vessel and solvent-heat treated at 200 ℃ for 24 hours. And after the reaction is finished, washing the precipitate for three times by using deionized water and absolute ethyl alcohol respectively, placing the washed precipitate in a 60 ℃ oven, drying the washed precipitate for 24 hours, finally placing the reactant in a muffle furnace, heating the reactant at the speed of 1 ℃/min and the temperature of 425 ℃, and annealing the reactant for 2 hours to obtain the precursor titanium dioxide nanoflower material.
Step 2: 100mg of precursor titanium dioxide nanoflower is added into 50mL of deionized water, and 0.595mL of chloroplatinic acid solution containing 5.95mg of chloroplatinic acid is added. The temperature of the solution water bath is kept at 100 ℃, and the reaction time is 5 hours. And after the reaction is finished, washing the precipitate with deionized water and absolute ethyl alcohol for three times respectively, and drying at 60 ℃ for 24 hours to obtain the platinum/titanium dioxide nanoflower composite material.
The product is characterized by having a nanoflower structure, the size of the nanoflower structure is 500-1000 nm, the nanoflower structure is formed by self-assembling ultrathin titanium dioxide nanosheets, and the thickness of the nanosheets is 2-9 nm. The platinum nano-particles are uniformly dispersed on the titanium dioxide nano-flower chips to form a heterojunction structure, and the particle size of the platinum nano-particles is 2-4 nm. The material XRD diffraction pattern and standard anatase phase TiO2The characteristic peaks of (a) coincide.
Under a full spectrum, 50mg of the platinum/titanium dioxide nanoflower composite material prepared in the embodiment is ultrasonically dispersed in 100mL of 30% (v/v) methanol solution, a reaction device is vacuumized and placed under a simulated light source, samples are taken every half hour, and gas is detected by gas chromatography. Therefore, a graph for hydrogen production of the platinum/titanium dioxide nanoflower composite material through photocatalytic decomposition under a simulated light source is drawn, and the graph shows that the platinum/titanium dioxide nanoflower composite material can be used for photocatalytic decomposition of water under the simulated light source, so that a good hydrogen production effect is shown. The light irradiation was carried out for 2.5 hours, and the hydrogen production was 30.4 mmol/g.
Example 3:
step 1: to 31.5mL of isopropyl alcohol was added 0.125mL of diethylenetriamine (EDTA), and the mixture was stirred for 10 min. To the solution was added 4.5mL of diisopropyl di (acetylacetonate) titanate. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction vessel and subjected to solvothermal treatment at 220 ℃ for 36 hours. And after the reaction is finished, washing the precipitate for three times by using deionized water and absolute ethyl alcohol respectively, placing the washed precipitate in a 60 ℃ oven, drying the washed precipitate for 24 hours, finally placing the reactant in a muffle furnace, heating the reactant at the speed of 10 ℃/min and the temperature of 425 ℃, and annealing the reactant for 2 hours to obtain the precursor titanium dioxide nanoflower material.
Step 2: 100mg of the precursor titanium dioxide nanoflower is added into 50mL of deionized water, and 0.297mL of chloroplatinic acid solution containing 2.97mg of chloroplatinic acid is added. The temperature of the solution water bath was kept at 80 ℃ and the reaction time was 2 hours. And after the reaction is finished, washing the precipitate with deionized water and absolute ethyl alcohol for three times respectively, and drying at 60 ℃ for 24 hours to obtain the platinum/titanium dioxide nanoflower composite material.
The product is characterized by having a nanoflower structure, the size of the nanoflower structure is 200-500 nm, the nanoflower structure is formed by self-assembling ultrathin titanium dioxide nanosheets, and the thickness of the nanosheets is 2-9 nm. The platinum nano-particles are uniformly dispersed on the titanium dioxide nano-flower chips to form a heterojunction structure, and the particle size of the platinum nano-particles is 2-4 nm. The material XRD diffraction pattern and standard anatase phase TiO2The characteristic peaks of (a) coincide.
Under a full spectrum, 50mg of the platinum/titanium dioxide nanoflower composite material prepared in the embodiment is ultrasonically dispersed in 100mL of 30% (v/v) methanol solution, a reaction device is vacuumized and placed under a simulated light source, samples are taken every half hour, and gas is detected by gas chromatography. Therefore, a graph for hydrogen production of the platinum/titanium dioxide nanoflower composite material through photocatalytic decomposition under a simulated light source is drawn, and the graph shows that the platinum/titanium dioxide nanoflower composite material can be used for photocatalytic decomposition of water under the simulated light source, so that a good hydrogen production effect is shown. The light irradiation was carried out for 2.5 hours, and the hydrogen production amount was 32.9 mmol/g.
Example 4:
step 1: to 31.5mL of isopropyl alcohol was added 0.125mL of diethylenetriamine (EDTA), and the mixture was stirred for 10 min. To the solution was added 4.5mL of diisopropyl di (acetylacetonate) titanate. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction vessel and subjected to solvothermal treatment at 220 ℃ for 36 hours. And after the reaction is finished, washing the precipitate for three times by using deionized water and absolute ethyl alcohol respectively, placing the washed precipitate in a 60 ℃ oven, drying the washed precipitate for 24 hours, finally placing the reactant in a muffle furnace, heating the reactant at the speed of 10 ℃/min and the temperature of 425 ℃, and annealing the reactant for 2 hours to obtain the precursor titanium dioxide nanoflower material.
Step 2: 100mg of precursor titanium dioxide nanoflower is added into 50mL of deionized water, and 0.595mL of chloroplatinic acid solution containing 5.95mg of chloroplatinic acid is added. The temperature of the solution water bath is kept at 100 ℃, and the reaction time is 5 hours. And after the reaction is finished, washing the precipitate with deionized water and absolute ethyl alcohol for three times respectively, and drying at 60 ℃ for 24 hours to obtain the platinum/titanium dioxide nanoflower composite material.
The product is characterized by having a nanoflower structure, the size of the nanoflower structure is 200-500 nm, the nanoflower structure is formed by self-assembling ultrathin titanium dioxide nanosheets, and the thickness of the nanosheets is 2-9 nm. The platinum nano-particles are uniformly dispersed on the titanium dioxide nano-flower chips to form a heterojunction structure, and the particle size of the platinum nano-particles is 2-4 nm. The material XRD diffraction pattern and standard anatase phase TiO2The characteristic peaks of (a) coincide.
Under a full spectrum, 50mg of the platinum/titanium dioxide nanoflower composite material prepared in the embodiment is ultrasonically dispersed in 100mL of 30% (v/v) methanol solution, a reaction device is vacuumized and placed under a simulated light source, samples are taken every half hour, and gas is detected by gas chromatography. Therefore, a graph for hydrogen production of the platinum/titanium dioxide nanoflower composite material through photocatalytic decomposition under a simulated light source is drawn, and the graph shows that the platinum/titanium dioxide nanoflower composite material can be used for photocatalytic decomposition of water under the simulated light source, so that a good hydrogen production effect is shown. The light irradiation was carried out for 2.5 hours, and the hydrogen production amount was 29.8 mmol/g.
Claims (4)
1. A preparation method of a platinum/titanium dioxide nanoflower composite material is characterized by comprising the following steps:
step 1: adding isopropanol into diethylenetriamine, uniformly stirring, adding diisopropyl di (acetylacetonate) titanate, wherein the volume ratio of the isopropanol to the diethylenetriamine to the diisopropyl di (acetylacetonate) titanate is 1260-2520: 1-10: 45-360, uniformly stirring, pouring into a reaction kettle, and stirring for 200-220oUnder the condition of C, carrying out heat treatment on the solvent for 24-36 hours, washing and drying; 1-10 times of the obtained productoThe temperature rises to reach a stable annealing temperature at the C/min temperature rise rate, and the annealing temperature is 425oC, annealing for 2 hours to obtain precursor oxygen-rich vacancy titanium dioxide sodiumA popcorn material;
step 2: the load of the platinum nanoparticles is realized by utilizing the reducibility of the oxygen vacancy defects of the titanium dioxide nanoflowers prepared in the step 1, and the method specifically comprises the following steps: uniformly dispersing 100mg of titanium dioxide nanoflowers into 50mL of deionized water, adding a chloroplatinic acid solution with the volume of 0.297-0.5 mL and containing 2.97mg of chloroplatinic acid, and carrying out water bath reaction at the water bath temperature of 80-100 DEGoC, reacting for 2-5 hours, washing and drying to obtain the platinum/titanium dioxide nanoflower composite material; the titanium dioxide nanoflower is composed of anatase-phase titanium dioxide nanosheets, and the thickness of each titanium dioxide nanosheet is 2-9 nm; platinum with the particle size of 2-4 nm is loaded on the surface of the titanium dioxide nanosheet to form a heterojunction structure.
2. The method of claim 1, wherein the reaction temperature in step 1 is 200%oC, the reaction time is 24 hours; the volume ratio of isopropanol, diethylenetriamine and diisopropyl bis (acetylacetonate) titanate is 1260:1: 45.
3. The method of claim 1, wherein the water bath temperature is 80 ℃oAnd C, the reaction time is 2 hours.
4. The method as claimed in claim 1, wherein the application of the prepared platinum/titanium dioxide nanoflower composite material as a photocatalyst comprises: the water is decomposed to produce hydrogen, the water is decomposed to produce oxygen, pollutants are degraded, the water is biologically and biologically antibacterial, and the water is decomposed by photoelectricity to synthesize organic matters.
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| CN201810465518.0A CN108671907B (en) | 2018-05-16 | 2018-05-16 | Platinum/titanium dioxide nanoflower composite material and preparation method and application thereof |
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| CN109289845A (en) * | 2018-10-30 | 2019-02-01 | 中国科学院宁波城市环境观测研究站 | A kind of titanium dioxide composite noble metal catalyst and its preparation method and application |
| CN109331816B (en) * | 2018-11-06 | 2021-09-21 | 郑州大学 | Preparation method of metal/oxide hybrid nano-system photocatalyst |
| CN111167440B (en) * | 2020-01-07 | 2023-05-02 | 郑州大学 | Catalyst for ammonia borane hydrolysis hydrogen evolution and preparation method thereof |
| CN112993278A (en) * | 2021-02-05 | 2021-06-18 | 青岛科技大学 | Flower-shaped titanium dioxide/reduced graphene composite carrier supported platinum and alloy catalyst thereof, and preparation and application thereof |
| CN113976110B (en) * | 2021-11-25 | 2023-01-03 | 浙江理工大学 | Catalyst for photocatalytic hydrogen production in alcohol-water system and preparation method thereof |
| CN114471543A (en) * | 2022-02-23 | 2022-05-13 | 北京工业大学 | Method for preparing platinum-based noble metal catalyst by wet process |
| CN115005233A (en) * | 2022-07-07 | 2022-09-06 | 辽宁石油化工大学 | Preparation method of platinum-loaded titanium-containing blast furnace slag photocatalytic antibacterial material |
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