CN106423155A - Preparation method of clavate Au@TiO2 composite photocatalytic nanometer material - Google Patents

Preparation method of clavate Au@TiO2 composite photocatalytic nanometer material Download PDF

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CN106423155A
CN106423155A CN201610953564.6A CN201610953564A CN106423155A CN 106423155 A CN106423155 A CN 106423155A CN 201610953564 A CN201610953564 A CN 201610953564A CN 106423155 A CN106423155 A CN 106423155A
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tio
hours
muffle furnace
shaped
bar
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李亚辉
席广成
白桦
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Chinese Academy of Inspection and Quarantine CAIQ
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48Silver or gold
    • B01J23/52Gold
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/308Dyes; Colorants; Fluorescent agents
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Toxicology (AREA)
  • Catalysts (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

The invention belongs to the technical field of advanced material, and particularly relates to a preparation method of stick type Au@TiO2 composite photocatalytic nanometer material. The method comprises the following steps: step 1, mixing tetrabutyl titanate and furfuryl alcohol, and stirring uniformly, adding ethyl alcohol solution, stirring uniformly to obtain the precursor, step 2, adding the precursor prepared in step 1 into the muffle furnace for reaction to acquire the clavate Au@TiO2 composite photocatalytic nanometer material. The method is simple in preparation steps, simple in operation, mild in methodology and good in repetitiveness. The clavate structure of the Au@TiO2 has the advantage of large specific surface area, wide responsive spectral range, being able to effectively boost the transmission of photon excited electrons, thus promoting the photocatalytic activity of the material.

Description

One kind prepares bar-shaped Au@TiO2The method of composite Nano catalysis material
Technical field
The invention belongs to inorganic advanced material technical field is and in particular to one kind prepares bar-shaped Au@TiO2Composite Nano light The method of catalysis material.
Background technology
Rhodamine B has strong fluorescence in the solution, as cell fluorescence coloring agent, coloured glass, characteristic in laboratory The industries such as fireworks and firecrackers, were once used as food additives, but experiment later proves that rhodamine B can be carcinogenic, did not allow now to use Make food dyeing.But it is difficult to degraded and easy accumulation property, causes seriously to threaten to human health and environment, therefore for containing sieve The process of the waste water of red bright B is particularly important.Conventional biodegrading process has chemical method, Physical and bioanalysis, wherein chemical method In photocatalytic degradation method cost efficiency higher.And the TiO in catalysis material2Because it has cheap, easy acquisition, can give birth in a large number Produce, the characteristic such as non-toxic and stable is widely used always;But, TiO2Big bandwidth (3.2eV) be it Big drawback, needs wavelength to be shorter than exciting of 400nm, and this can cause the reduction of the efficiency of light energy utilization;And excite the weight of rear electric charge The new limitation combining the catalytic action that also result in material.Therefore, it is to be transferred to visible region by band now concerning research, Thus using the solar energy of this part, or strengthen the separation of electric charge by reducing electronics and recombining of hole.? TiO2Area load noble metal such as Pt, Ag, Pd and Au can increase photocatalysis efficiency, for Au@TiO2Due to surface plasma Effect, has very strong absorption in visible light part, thus the very high photocatalysis efficiency of performance.
Application for a patent for invention number provides a kind of titanium dioxide/gold core shell structure composite Nano for 201410359363.4 Grain and preparation method thereof, including:There is provided inner surface to modify the aqueous solution of the titanium dioxide hollow Nano particle of amino, then disperse In aqueous solution of chloraurate, ultrasonic reaction after the stirring of first time lucifuge;Heating water bath, centrifugation after second lucifuge stirring, Au@TiO is obtained after drying2Composite nanometer particle;By Au@TiO2Composite nanometer particle high annealing, obtains titanium dioxide/gold core Shell structured composite nano particle.The preparation method process of the present invention is complicated.
Content of the invention
Not enough for prior art, the present invention provides one kind to prepare bar-shaped Au@TiO2Composite nano catalysis material Method, it comprises the steps:
Step one, mixing tetrabutyl titanate and furfuryl alcohol, stir, and add gold chloride ethanol solution, are uniformly mixing to obtain Presoma;
Step 2, step one is obtained presoma and puts into reaction in Muffle furnace, you can obtain bar-shaped Au@TiO2Composite Nano Catalysis material, "@" expression is wrapped by.
Further, the concentration of gold chloride ethanol solution is 0.02g/mL.
Further, tetrabutyl titanate, furfuryl alcohol and gold chloride volumes of aqueous ethanol are than for 1:6:0.25~1:6:1.26.
Further, described presoma keeps 12 hours for 90-100 DEG C in Muffle furnace, and 400-450 DEG C keeps 3 hours, Calcination 8-10 hour under the conditions of 500 DEG C.
Further, the heating rate of described Muffle furnace is 1 DEG C/min.
Preferably, described presoma keeps 12 hours for 90 DEG C in Muffle furnace, 400 DEG C and keep 3 hours, in 500 DEG C of bars Calcination 8 hours under part.
Compared with prior art, the beneficial effects of the present invention is:Described preparation method step is simple, easy to operate, method Gently, repeatable high;Au@TiO2The specific surface area of club shaped structure is big, photoresponse wide ranges, is effectively facilitated light induced electron and passes Pass, thus strengthening its photocatalytic activity.
Brief description
Fig. 1 is bar-shaped Au@TiO of the present invention2The X-ray diffraction XRD of composite Nano catalysis material;
Fig. 2 is bar-shaped Au@TiO of the present invention2The SEM SEM figure of composite Nano catalysis material;
Fig. 3 is bar-shaped Au@TiO of the present invention2The transmission electron microscope TEM figure of composite Nano catalysis material;
Fig. 4 is bar-shaped Au@TiO of the present invention2The energy disperse spectroscopy EDS figure of composite Nano catalysis material;
Fig. 5 is bar-shaped Au@TiO of the present invention2Composite Nano catalysis material rhodamine B degradation reaction rate is illustrated Figure;
Fig. 6 is TiO2SEM SEM figure;
Fig. 7 is TiO2Rhodamine B degradation reaction rate schematic diagram.
Specific embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail:
One kind of the present invention prepares bar-shaped Au@TiO2The method of composite nano catalysis material, it includes walking as follows Suddenly:
Step one, mixing tetrabutyl titanate and furfuryl alcohol, stir, and add gold chloride ethanol solution, are uniformly mixing to obtain Presoma;
Step 2, step one is obtained presoma and puts into reaction in Muffle furnace, you can obtain bar-shaped Au@TiO2Composite Nano Catalysis material, "@" expression is wrapped by.
Further, the concentration of gold chloride ethanol solution is 0.02g/mL.
Further, tetrabutyl titanate, furfuryl alcohol and gold chloride volumes of aqueous ethanol are than for 1:6:0.25~1:6:1.26.
Further, described presoma keeps 12 hours for 90-100 DEG C in Muffle furnace, and 400-450 DEG C keeps 3 hours, Calcination 8-10 hour under the conditions of 500 DEG C.
Further, the heating rate of described Muffle furnace is 1 DEG C/min.
Further, described presoma keeps 12 hours for 90 DEG C in Muffle furnace, 400 DEG C and keep 3 hours, at 500 DEG C Under the conditions of calcination 8 hours.
Bar-shaped Au@TiO of the present invention2Composite nano catalysis material reaction principle:Presoma is firstly because Ti (IV) lewis acid reduction, furfuryl alcohol monomer gradually forms the furfuryl alcohol resin of intersection, and furfuryl alcohol resin comprises multiple functions Property OH, furfuryl alcohol resin and OH pass through synergy in the course of the polymerization process, form furfuryl alcohol resin-metal ion compound, Au simultaneously3+ Electron reduction can be obtained from OH and become Au0, Au0Inlay in the bracket, Au TiO is formed by calcining2.
Au@TiO2The process of catalysis rhodamine B reaction is specific as follows:By Au@TiO2Catalyst is dispersed in 100mL and contains Luo Dan In the bright B aqueous solution, it is stirred at room temperature.Record a UV-Vis spectrum every 5 minutes.Reaction terminate after, deionized water from Heart washing catalyst.Catalyst reclaims and uses it for second catalytic reaction.This process is repeated 3 times.Above-mentioned Au@TiO2Catalysis Agent quality is 0.01-0.1g, and the concentration of rhodamine B is 5-50mg/L.
Embodiment 1
5mL tetrabutyl titanate and 30mL furfuryl alcohol stir 0.5 hour on magnetic stirring apparatus, take 5.1mL concentration to be 0.02g/ The ethanol solution of mL gold chloride adds, and stirs 0.5 hour, gained predecessor is transferred in crucible, is placed in Muffle furnace, first with 1 DEG C/min heating rate is warming up to 90 DEG C of holdings 12 hours, then, then to be warming up to 400 DEG C under 1 DEG C/min heating rate and to protect Hold 3 hours, finally calcination 12 hours under the conditions of 500 DEG C.Obtained product through XRD, after SEM, TEM and EDS etc. characterize, such as Fig. 1- Shown in 5, it is defined as bar-shaped Au@TiO2Composite nano catalysis material, its diameter and length are:2.5μm、30μm.By Fig. 1 Shown, this bar-shaped Au@TiO2TiO in composite nano catalysis material2It is by substantial amounts of Anatase and small part rutile Phase composition, Au can also be clearly seen;As shown in Fig. 2 SEM can find out the mesoporous top layer of this club shaped structure, i.e. hole with clearing Footpath is between 2 to 50nm.TEM shows that club shaped structure has meso-hole structure to be formed further as shown in Figure 3;The transmission electricity of Fig. 3 Mirror can be seen that Au is to be evenly distributed in TiO2On;Fig. 4 has further confirmed that the atomic ratio of Au, Ti and O in this club shaped structure Example, Au close with original solution:Ti:O ratio is 0.6:28.29:68.02.
Embodiment 2
5mL tetrabutyl titanate and 30mL furfuryl alcohol stir 0.5 hour on magnetic stirring apparatus, take 5.1mL concentration to be 0.02g/ mL HAuCl4·4H2The ethanol solution of O adds, and stirs 0.5 hour, gained predecessor is transferred in crucible, is placed in Muffle furnace In, first it is warming up to 100 DEG C with 1 DEG C/min heating rate and keeps 12 hours, then, then be warming up to under 1 DEG C/min heating rate 450 DEG C and keep 3 hours, finally calcination 12 hours under the conditions of 500 DEG C.Obtained product is through XRD, SEM, TEM and EDS (in figure Do not show) etc. characterize after, be defined as bar-shaped Au@TiO2Composite nano catalysis material.
Embodiment 3
5mL tetrabutyl titanate and 30mL furfuryl alcohol stir 0.5 hour on magnetic stirring apparatus, and the orange predecessor of gained is turned Enter in crucible, be placed in Muffle furnace, be first warming up to 90 DEG C with 1 DEG C/min heating rate and keep 12 hours, then, then with 1 DEG C/ It is warming up to 400 DEG C under min heating rate and keep 3 hours, finally calcination 12 hours under the conditions of 500 DEG C.As shown in fig. 6, institute Obtain product after the sign such as SEM, be defined as bar-shaped TiO2, described TiO2Diameter and length be:2.5μm、30μm.
Application examples 1
By the bar-shaped Au@TiO obtaining in embodiment 12Composite nano catalysis material and embodiment 3 obtain bar-shaped TiO2Carry out being catalyzed rhodamine B reaction.As shown in figure 5, described bar-shaped Au@TiO2Composite nano catalysis material is in 25min Afterwards Luo Ming pellet B is degraded to 0, as shown in fig. 7, and bar-shaped TiO2After 45min still by Luo Ming pellet B degraded not completely.
Last it should be noted that above example is only in order to illustrate technical scheme and unrestricted, although ginseng According to preferred embodiment, the present invention is described in detail, it will be understood by those within the art that, can be to the present invention Technical scheme modify or equivalent, the objective without deviating from technical solution of the present invention and scope, it all should be covered In the middle of scope of the presently claimed invention.

Claims (6)

1. one kind prepares bar-shaped Au@TiO2The method of composite Nano catalysis material, it comprises the steps:
Step one, mixing tetrabutyl titanate and furfuryl alcohol, stir, and add gold chloride ethanol solution, are uniformly mixing to obtain forerunner Body;
Step 2, step one is obtained presoma and puts into reaction in Muffle furnace, that is, obtain bar-shaped Au TiO2Composite Nano photocatalysis Material.
2. according to claim 1 methods described it is characterised in that the concentration of gold chloride ethanol solution is 0.02g/mL.
3. according to claim 1 methods described it is characterised in that tetrabutyl titanate, furfuryl alcohol and gold chloride volumes of aqueous ethanol ratio For 1:6:0.25~1:6:1.26.
4. according to claim 1 methods described it is characterised in that the 90-100 DEG C of holding 12 in Muffle furnace of described presoma is little When, 400-450 DEG C keeps 3 hours, calcination 8-10 hour under the conditions of 500 DEG C.
5. according to claim 1 methods described it is characterised in that the heating rate of described Muffle furnace is 1 DEG C/min.
6. according to claim 4 methods described it is characterised in that described presoma in Muffle furnace 90 DEG C keep 12 hours, 400 DEG C keep 3 hours, calcination 8 hours under the conditions of 500 DEG C.
CN201610953564.6A 2016-11-03 2016-11-03 Preparation method of clavate Au@TiO2 composite photocatalytic nanometer material Pending CN106423155A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000140643A (en) * 1998-11-13 2000-05-23 Dainippon Ink & Chem Inc Fixing method of metal-based catalyst
CN103316646A (en) * 2013-06-21 2013-09-25 中国检验检疫科学研究院 Porous metal oxide, and synthesis method and application thereof
CN103764283A (en) * 2011-09-06 2014-04-30 住友电木株式会社 Resin-supported catalyst and method for producing resin-supported catalyst
CN104497299A (en) * 2014-11-20 2015-04-08 济南圣泉集团股份有限公司 Method for preparing low dissociation furfuryl alcohol binder
CN105854863A (en) * 2016-04-14 2016-08-17 龙岩学院 Method for preparing C/ZnO/TiO2 composite nano photocatalytic material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000140643A (en) * 1998-11-13 2000-05-23 Dainippon Ink & Chem Inc Fixing method of metal-based catalyst
CN103764283A (en) * 2011-09-06 2014-04-30 住友电木株式会社 Resin-supported catalyst and method for producing resin-supported catalyst
CN103316646A (en) * 2013-06-21 2013-09-25 中国检验检疫科学研究院 Porous metal oxide, and synthesis method and application thereof
CN104497299A (en) * 2014-11-20 2015-04-08 济南圣泉集团股份有限公司 Method for preparing low dissociation furfuryl alcohol binder
CN105854863A (en) * 2016-04-14 2016-08-17 龙岩学院 Method for preparing C/ZnO/TiO2 composite nano photocatalytic material

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Title
GUANGCHENG XI ET AL.: "General Synthesis of Hybrid TiO2 Mesoporous "French Fries" Toward Improved Photocatalytic Conversion of CO2 into Hydrocarbon Fuel: A Case of TiO2/ZnO", 《CHEM. EUR. J.》 *
李晓倩等: "Au改性TiO2纳米粒子的制备及其光催化活性", 《哈尔滨工业大学学报》 *
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Application publication date: 20170222