CN108840579A - A kind of superfine Ti O2Nano crystal array and preparation method thereof - Google Patents

A kind of superfine Ti O2Nano crystal array and preparation method thereof Download PDF

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Publication number
CN108840579A
CN108840579A CN201810871136.8A CN201810871136A CN108840579A CN 108840579 A CN108840579 A CN 108840579A CN 201810871136 A CN201810871136 A CN 201810871136A CN 108840579 A CN108840579 A CN 108840579A
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crystal array
nano crystal
superfine
tio
solution
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黄�俊
达令
徐光青
吕珺
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Hefei University of Technology
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Hefei University of Technology
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/3411Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
    • C03C17/3417Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00Coatings on glass
    • C03C2217/20Materials for coating a single layer on glass
    • C03C2217/21Oxides
    • C03C2217/212TiO2
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00Coatings on glass
    • C03C2217/20Materials for coating a single layer on glass
    • C03C2217/21Oxides
    • C03C2217/24Doped oxides
    • C03C2217/241Doped oxides with halides
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00Coatings on glass
    • C03C2217/70Properties of coatings
    • C03C2217/71Photocatalytic coatings
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00Methods for coating glass
    • C03C2218/10Deposition methods
    • C03C2218/11Deposition methods from solutions or suspensions
    • C03C2218/111Deposition methods from solutions or suspensions by dipping, immersion
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00Methods for coating glass
    • C03C2218/30Aspects of methods for coating glass not covered above
    • C03C2218/32After-treatment
    • C03C2218/328Partly or completely removing a coating
    • C03C2218/33Partly or completely removing a coating by etching

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

The present invention relates to a kind of superfine Ti O2Nano crystal array, the TiO having a size of 10-50nm size2Nanocrystalline vertical-growth is in the superfine Ti O constituted on FTO electro-conductive glass matrix2Nano crystal array;Preparation method is:By hydro-thermal reaction in growing TiO in clean FTO electro-conductive glass substrate2Nano crystal array, hydro-thermal reaction solution are the mineral acid aqueous solution containing soluble T i salt, and hydro-thermal reaction product obtains TiO through calcining2Nano crystal array finally obtains superfine Ti O using the liquid phase etching of alkaline solution2Nano crystal array.Present invention combination TiO2The properity feature of nano crystal array, superfine Ti O of the construction size as 10-50nm2Nano crystal array has high-specific surface area, from photo-generate electron-hole is reduced to recombination probability and raising TiO2Two aspects of nanorod surfaces reactivity improve its optical electro-chemistry activity and incident photon-to-electron conversion efficiency.

Description

A kind of superfine Ti O2Nano crystal array and preparation method thereof
Technical field
The present invention relates to nano material, photocatalysis and photoelectric conversion technical fields, and in particular to a kind of superfine TiO2 nanometer Brilliant array and preparation method thereof.
Background technique
TiO2Nano material because of its outstanding physical and chemical performance, make its be widely used in photocatalytic degradation of organic matter, The fields such as photodegradation water and fuel sensitization solar battery.Wherein TiO2Nano crystal array have excellent absorbing properties,
Lower electronics recombination probability, makes it than zero dimension TiO2Nanometer particle film is preferably to be used for photoelectrocatalysis field. But there are still some problems seriously to constrain TiO2Nano crystal array is further applied.TiO2Nano crystal array specific surface area It is smaller, however, the increase of specific surface area can effectively improve active site and organic matter adsorption capacity, to improve light degradation effect Rate.TiO2The length of nano crystal array decides TiO2Specific surface area, but TiO2The length of nano crystal array film is if more than electronics Length needed for transmission, will increase electronics and hole-recombination probability, so as to cause the reduction of photocatalysis hydrogen production efficiency.
Summary of the invention
To solve the above problems, it is an object of the invention to:A kind of superfine Ti O is provided2Nano crystal array and its preparation side Method, to improve its PhotoelectrocatalytiPerformance Performance.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of superfine Ti O2Nano crystal array, the TiO having a size of 10-50nm size2Nanocrystalline vertical-growth is in FTO conduction The superfine Ti O constituted on glass matrix2Nano crystal array.
A kind of superfine Ti O2The preparation method of nano crystal array, it is characterised in that:It is led by hydro-thermal reaction in clean FTO TiO is grown in electric substrate of glass2Nano crystal array, hydro-thermal reaction solution are the mineral acid aqueous solution containing soluble T i salt, Hydro-thermal reaction product obtains TiO through calcining2Nano crystal array finally obtains superfine Ti O using the liquid phase etching of alkaline solution2It receives The brilliant array of rice.
Preferably, a kind of superfine Ti O2The preparation method of nano crystal array, specific step is as follows:
(1) by FTO electro-conductive glass be placed in isopropanol, alcohol, deionized water mixed solution in be cleaned by ultrasonic after dry protect It deposits stand-by;
(2) inorganic acid solution that concentration is 2-8mol/L is slowly added to deionized water, and is mixed using magnetic stirring apparatus Uniformly;Then the titanium source solution that concentration is 0.01-0.10mol/L is added using liquid-transfering gun, stirring is transferred to reaction to uniformly mixed In kettle, the FTO electro-conductive glass after step (1) cleaning is immersed, the reaction kettle after sealing is placed on by high-temperature process 150-240 DEG C of baking oven inside holding 50-400min, takes out FTO electro-conductive glass after cooling, cleaning obtains being grown on FTO conduction glass The TiO of glass2Nano crystal array;
(3) TiO of FTO glass will be grown on2Nano crystal array is placed in Muffle furnace in 400-550 DEG C of calcining 60- 150min;
(4) alkaline solution for configuring 0.001-0.5mol/L, step (3) product is placed in alkaline solution and etches 30- 200min after cleaning, obtains superfine Ti O2Nano crystal array.
Preferably, titanium source solution used in step (2) is one of butyl titanate, titanium tetrachloride, isopropyl titanate Or a variety of mixed solutions.
Preferably, inorganic acid solution used in step (2) is that one of hydrochloric acid, nitric acid, sulfuric acid or a variety of mixing are molten Liquid.
Preferably, it is that one of NaOH, KOH, LiOH or a variety of mixing are molten that alkaline solution used is etched in step (4) Liquid.
The beneficial effects of the present invention are:
Present invention combination TiO2The properity feature of nano crystal array, superfine Ti O of the construction size as 10-50nm2 Nano crystal array has high-specific surface area, from photo-generate electron-hole is reduced to recombination probability and raising TiO2Nanorod surfaces are anti- Two aspects of activity are answered to improve its optical electro-chemistry activity and incident photon-to-electron conversion efficiency.
Detailed description of the invention
Fig. 1 is the superfine Ti O refined through various concentration alkaline solution2The SEM of nano crystal array schemes;
Wherein, the TiO shown in Fig. 1 (i) not refine2Nano crystal array, Fig. 1 (ii), Fig. 1 (iii), Fig. 1 (iv) point It is not alkaline solution concentration under the conditions of 0.025mol/L, 0.05mol/L, 0.1mol/L, the SEM of etching schemes.
Fig. 2 is basic Ti0 prepared by the embodiment of the present invention 12Nano crystal array and respectively in 0.025mol/L, 0.05mol/ L, the superfine Ti 0 of the alkaline solution that (corresponds respectively to curve a, b, c, d in Fig. 2) under 0.1mol/L concentration etching2Nanocrystalline battle array The photo-current intensity curve graph of column.
Specific embodiment
The present invention is further illustrated with reference to embodiments, it should be noted that is only to present inventive concept Example and explanation, affiliated those skilled in the art make various modifications to described specific embodiment Or supplement or be substituted in a similar manner, as long as it does not deviate from the concept of invention or surmount model defined in the claims It encloses, is regarded as falling into protection scope of the present invention.
Embodiment 1
A kind of superfine Ti O2Nano crystal array and preparation method thereof preparation process is:
(1) FTO electro-conductive glass is placed in ratio is 1:1:1 isopropanol, alcohol, ultrasound is clear in deionized water mixed solution 10min is washed, rear drying saves stand-by.
(2) hydro-thermal reaction precursor liquid is prepared, specifically:Firstly, 12.5mL concentrated hydrochloric acid solution is slowly added to 12.5mL Deionized water, and using magnetic stirring apparatus be uniformly mixed;Then the butyl titanate of 800 μ L, stirring are added using liquid-transfering gun Extremely it is uniformly mixed;Finally hydro-thermal reaction liquid is transferred in reaction kettle, the FTO glass after cleaning is immersed.It is anti-after sealing It answers kettle to handle for a period of time by high temperature, FTO glass, cleaning is taken out after cooling.
(3) TiO for being grown on FTO glass for obtaining step (2)2Nano crystal array is placed in 500 DEG C of calcinings in Muffle furnace Crystallization keeps the temperature 120min.
(4) KOH solution for configuring 0.025mol/L, by step 3) product TiO2It is carved in nano crystal array merging KOH solution 60min is lost, after cleaning, obtains superfine Ti O2Nano crystal array
Fig. 1 (ii) show the alkaline solution aqueous solution refinement TiO of 0.025mol/L2Nano crystal array different angle SEM pattern, as can be seen from the figure TiO2Nanorod diameter is 50nm or so, nanometer rods marshalling.
After tested, TiO is refined according to the alkaline solution aqueous solution that above-mentioned steps are prepared2Nano crystal array, in 48mW/cm2 Ultraviolet light under, photoelectric current be 450 μ A, about step (3) preparation do not refine TiO2The 4 of nano crystal array photoelectric current Times.
Embodiment 2
The preparation method is the same as that of Example 1 for the present embodiment, the difference is that (the proofing concentration in 5 is changed to 0.05mol/L to step.
After tested, TiO is refined according to the alkaline solution aqueous solution that above-mentioned steps are prepared2Nano crystal array, in 48mW/cm2 Ultraviolet light under, photoelectric current be 220 μ A, about step (3 preparation do not refine TiO2The 2.8 of nano crystal array photoelectric current Times.
Embodiment 3
The preparation method is the same as that of Example 1 for the present embodiment, the difference is that the proofing concentration in step (5) is changed to 0.1mol/L.
After tested, TiO is refined according to the alkaline solution aqueous solution that above-mentioned steps are prepared2Nano crystal array, in 48mW/cm2 Ultraviolet light under, photoelectric current be 180 μ A, about step (3) preparation do not refine TiO2The 2.2 of nano crystal array photoelectric current Times.

Claims (6)

1. a kind of superfine Ti O2Nano crystal array, it is characterised in that:TiO having a size of 10-50nm size2Nanocrystalline vertical-growth In the superfine Ti O constituted on FTO electro-conductive glass matrix2Nano crystal array.
2. a kind of superfine Ti O as described in claim 12The preparation method of nano crystal array, it is characterised in that:It is anti-by hydro-thermal TiO should be grown in clean FTO electro-conductive glass substrate2Nano crystal array, hydro-thermal reaction solution are to contain soluble T i salt Mineral acid aqueous solution, hydro-thermal reaction product obtain TiO through calcining2Nano crystal array is finally carved using the liquid phase of alkaline solution Erosion obtains superfine Ti O2Nano crystal array.
3. superfine Ti O as claimed in claim 22The preparation method of nano crystal array, it is characterised in that:Specific step is as follows:
(1) by FTO electro-conductive glass be placed in isopropanol, alcohol, deionized water mixed solution in be cleaned by ultrasonic after drying save to With;
(2) inorganic acid solution that concentration is 2-8mol/L is slowly added to deionized water, and is uniformly mixed using magnetic stirring apparatus; Then the titanium source solution that concentration is 0.01-0.10mol/L being added using liquid-transfering gun, stirring is transferred in reaction kettle to uniformly mixed, FTO electro-conductive glass after step (1) cleaning is immersed, the reaction kettle after sealing is placed on 150-240 by high-temperature process DEG C baking oven inside holding 50-400min, FTO electro-conductive glass is taken out after cooling, cleaning obtains the TiO for being grown on FTO electro-conductive glass2 Nano crystal array;
(3) TiO of FTO electro-conductive glass will be grown on2Nano crystal array is placed in Muffle furnace in 400-550 DEG C of calcining 60- 150min;
(4) alkaline solution for configuring 0.001-0.5mol/L, step (3) product is placed in alkaline solution and etches 30-200min, After cleaning, superfine Ti O is obtained2Nano crystal array.
4. superfine Ti O as claimed in claim 32The preparation method of nano crystal array, it is characterised in that:Used in step (2) Titanium source solution is one or more of butyl titanate, titanium tetrachloride, isopropyl titanate mixed solution.
5. superfine Ti O as claimed in claim 32The preparation method of nano crystal array, it is characterised in that:Used in step (2) Inorganic acid solution is one of hydrochloric acid, nitric acid, sulfuric acid or a variety of mixed solutions.
6. superfine Ti O as claimed in claim 32The preparation method of nano crystal array, it is characterised in that:Institute is etched in step (4) It is one of NaOH, KOH, LiOH or a variety of mixed solutions with alkaline solution.
CN201810871136.8A 2018-08-02 2018-08-02 A kind of superfine Ti O2Nano crystal array and preparation method thereof Pending CN108840579A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109920649A (en) * 2019-04-03 2019-06-21 湖北大学 One-dimensional super long TiO2Nanometer stick array and preparation method thereof and the application in dye-sensitized solar cells

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109920649A (en) * 2019-04-03 2019-06-21 湖北大学 One-dimensional super long TiO2Nanometer stick array and preparation method thereof and the application in dye-sensitized solar cells

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Application publication date: 20181120