CN104338523A - Titanium dioxide photocatalyst structure - Google Patents
Titanium dioxide photocatalyst structure Download PDFInfo
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- CN104338523A CN104338523A CN201410283537.3A CN201410283537A CN104338523A CN 104338523 A CN104338523 A CN 104338523A CN 201410283537 A CN201410283537 A CN 201410283537A CN 104338523 A CN104338523 A CN 104338523A
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- titanium dioxide
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Abstract
The invention discloses a titanium dioxide photocatalyst structure. The titanium dioxide photocatalyst structure comprises a carrier and a titanium dioxide film formed on the carrier, wherein the titanium dioxide film comprises elliptical spherical titanium dioxide particles. Moreover, titanium dioxide provided by the invention is of an anatase structure; the long axes of the elliptical spherical titanium dioxide particles are 10-15 nanometers, and the short axes of the elliptical spherical titanium dioxide particles are 3-6 nanometers. The titanium dioxide film has a super-hydrophilic property, and has relatively great dirt removing and self-cleaning efficacies; under the illumination of a fluorescent lamp, an ultraviolet lamp or sunlight, the titanium dioxide film has high activity.
Description
Technical field
The present invention discloses a kind of structure of photocatalyst of titanium dioxide.
Background technology
So-called photocatalyst, is just through the irradiation of light, can promotes the material of chemical reaction.The material that can be used as photocatalyst at present has the oxides such as titanium dioxide, and wherein titanium dioxide is because have powerful oxidability, high chemically stability, and nontoxic characteristic, is the most often used for the material as photocatalyst.Photocatalyst can be used for the harmful chemical processing low concentration in air, and itself can not disengage harmful substance, is therefore splendid environmental purification catalyst.Photocatalyst has smelly eliminating, sterilization, antibacterial, antifouling and function such as removing harmful substance etc., but current photocatalyst antibacterial effect under 365nm ultraviolet light is limited, without antibacterial effect under without the environment of ultraviolet light.
The crystal structure of titanium dioxide has tetragonal rutile (rutile) type, anatase (anatase) type and belongs to 3 kinds, rhombic brockite (brookite) type.Wherein only has the effect of anatase structured tool photocatalyst.It is by ultraviolet light or sunshine exciting light catalyst that the light of photocatalysis treatment program decomposes mechanism, makes catalyst produce electronics and electric hole, uses the material of oxidized surface absorption, and then be Small molecular by the substance decomposition of adsorption.For titanium dioxide, Titanium dioxide absorption light produces electronics and electric hole, this electric hole has great oxidability, can it be made to decompose the contaminant molecule direct oxidation being adsorbed on titanium dioxide surface, or the hydrone being adsorbed in material surface is oxidized to hydroxyl free radical.Originally macromolecular pollutant, via photocatalyst reaction by macromolecular cleavage, reaches the object removed by pollutant.
Photocatalyst is extensively studied, and is applied in the aspects such as environmental protection, the energy, sterilization, oneself's cleaning.TiO
2h can be produced by decomposition water after finding irradiation
2and O
2, more and more people drops into TiO
2the research of photocatalytic qualitative correlation, and be devoted to various possible method for modifying, to improve TiO
2the effect of photocatalyst.
Titanium dioxide can be made into powder and directly drop in waste water, also substrate surface can be coated, organic substance in the irradiation accelerated decomposition water and air of mat ultraviolet light, but can face how to reclaim powder, and can the surface area of catalyst receive the problems such as the irradiation of ultraviolet light completely.In order to improve these problems, titanium dioxide being made film, increasing photocatalysis effect with the exposed area improving titanium dioxide, so not only can solve the problem, more increasing the purposes of photocatalyst of titanium dioxide simultaneously.
The photocatalyst of general use is the titanium dioxide of spheroidal, and when film is made up of titanium dioxide spheroidal, the space in the middle of it is comparatively large, and the photocatalyst activity of spheroidal titanium dioxide is poor.Therefore, study the performance of how to promote photo-catalyst film and still have demand.
Summary of the invention
An object of the present invention, be the structure that a kind of photocatalyst of titanium dioxide is provided, wherein titanium deoxid film comprises the oval spheric granules of titanium dioxide, titanium dioxide granule be oval spherical time, space in the middle of it is less, therefore in unit volume, the amount of titanium dioxide increases, and can promote overall decontamination and self-cleaning effect.
In order to reach above-mentioned object, the invention provides a kind of structure of photocatalyst of titanium dioxide, the photo-catalyst film comprising a carrier and be formed on carrier, such as titanium deoxid film, wherein this titanium deoxid film comprises the oval spheric granules of titanium dioxide.Use the oval spheric granules of titanium dioxide by above, really can promote the performance of photo-catalyst film.
Compared to the photocatalyst of titanium dioxide spherical granules that tradition uses, the present invention is less for the formation of the space between the oval spheric granules of titanium dioxide of photo-catalyst film and particle, therefore in unit volume, the amount of titanium dioxide increases, and can promote overall decontamination and self-cleaning effect.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
The cross-sectional schematic of the structure of Fig. 1 photocatalyst of titanium dioxide of the present invention; And
The structural representation of Fig. 2 titanium deoxid film of the present invention.
Wherein, Reference numeral
1 carrier
2 photo-catalyst films
The oval spheric granules of 22 titanium dioxide
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate accompanying drawing to be described as follows, but appended accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the cross-sectional schematic of the structure of photocatalyst of titanium dioxide of the present invention.Fig. 2 is the structural representation of titanium deoxid film of the present invention.As depicted in figs. 1 and 2, the structure of photocatalyst of titanium dioxide of the present invention, the photo-catalyst film 2 such as titanium deoxid film comprising a carrier 1 and formed on the carrier 1, wherein photo-catalyst film 2 comprises the oval spheric granules 22 of titanium dioxide.This photo-catalyst film 2 thickness is less than 1 millimeter, and this titanium dioxide has anatase structured, the major axis of the oval spheric granules of this titanium dioxide is 10 to 15 nanometers, and minor axis is 3 to 6 nanometers, and the activity of the titanium dioxide spherical granules that the oval spheric granules of this titanium dioxide uses than prior art is high.Carrier 1 can be glass, stone material, ceramic tile or transparent plastic material.Titanium dioxide granule be oval spherical time, the space in the middle of it is less, and therefore in unit volume, the amount of titanium dioxide increases, and when titanium dioxide is oval spheric granules, its photocatalyst activity can increase.The activity of the spheroidal titanium dioxide that the oval spheric granules 22 of this titanium dioxide uses than prior art is high, and this titanium deoxid film has Superhydrophilic on carrier, and has strong decontamination and self-cleaning effect.During with this titanium deoxid film of fluorescent lamp, ultraviolet lamp or sunlight, there is high activity.
The preparation method of the structure of photocatalyst of titanium dioxide of the present invention comprises cleaning and the plated film of carrier.Carrier surface without cleaning may have oily matter or other filth, can cause plated film uneven and dry time the phenomenon of peeling off.Cleaning carrier is to enable titanium dioxide granule be attached to more firmly on carrier.The step of cleaning carrier is as follows: be statically placed in by carrier in mild detergent, clean 1 hour with ultrasonic vibrating; With the cleaning agent that washed with de-ionized water carrier surface is residual, and clean 1 hour with ultrasonic vibrating; Carrier is placed in sodium hydroxide solution, cleans 1 hour with ultrasonic vibrating; Residue in the sodium hydroxide solution on carrier surface with washed with de-ionized water, and clean 1 hour with ultrasonic vibrating; Finally, carrier inserted dry in baking oven and preserve, in order to the use of plated film.
The step of the dipping plated film of carrier of the present invention is as follows: be placed in by overlay film liquid and draw high on board; Glass baseplate is fixed on the machine of drawing high; Immersed by glass baseplate in overlay film liquid, fall off rate is 5-10cm/min; Start to draw high overlay film, climbing speed is 5-10cm/min; After overlay film, irradiate 30 minutes under being placed in ultraviolet lamp; The glass baseplate processed is placed in baking oven, in temperature less than 400 DEG C calcining, namely completes the overlay film work of photocatalyst of titanium dioxide film.When making multilayer coating film, above-mentioned every step must be repeated.Above-mentioned overlay film liquid comprises TiO 2 sol.Except above-mentioned czochralski method, also the modes such as roll coating process, swabbing process, spread coating, spraying process, spin-coating method can be used to be formed on carrier by the overlay film liquid containing TiO 2 sol, again through excess temperature less than 400 DEG C calcining, calcination time is less than 2 hours, oval for this titanium dioxide spheric granules can be bonded on the surface of carrier.
In one embodiment, the manufacture method for the formation of the TiO 2 sol of titanium deoxid film comprises following steps: provide titanium tetrachloride, at 0 ~ 5 DEG C, add aqueous hydrochloric acid solution, forms a solution A; Add ammonia spirit, make solution A form titanium hydroxide colloid, its pH value 7 to 12 scope; Add hydrogen peroxide, form a B solution, now the solid weight of titanium dioxide and the ratio of water are 0.01% to 2%, and the mole ratio of hydrogen peroxide and titanium is between 2 to 1 to 5 to 1; And B solution heats in the scope of 60 to 100 DEG C, until colloid complete hydrolysis disappears, the TiO 2 sol of stable transparent can be formed.
Photo-catalyst film of the present invention has antiviral effect.Test Virus kind is respectively enterovirus and influenza type-A virus.Embodiment 1 adds 2.5wt% TiO 2 sol in coating liquid, and coating liquid is formed a photo-catalyst film on carrier, and according to the method for normalizing of ASTM E1052-96, the antiviral rate of this photo-catalyst film is all 99.9% after tested.Comparative example 1 does not add TiO 2 sol, according to the method for normalizing of ASTM E1052-96, and its antiviral rate 0% after tested.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (4)
1. a structure for photocatalyst of titanium dioxide, the titanium deoxid film comprising a carrier and formed on this carrier, is characterized in that, this titanium deoxid film comprises the oval spheric granules of titanium dioxide.
2. the structure of photocatalyst of titanium dioxide according to claim 1, is characterized in that, the major axis of the oval spheric granules of this titanium dioxide is 10 to 15 nanometers, minor axis is 3 to 6 nanometers.
3. the structure of photocatalyst of titanium dioxide according to claim 1, is characterized in that, the thickness of this titanium deoxid film is less than 1 millimeter.
4. the structure of photocatalyst of titanium dioxide according to claim 1, is characterized in that, this carrier is glass, stone material, ceramic tile or transparent plastic material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410283537.3A CN104338523A (en) | 2013-08-01 | 2014-06-23 | Titanium dioxide photocatalyst structure |
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|---|---|---|---|
| CN201320467665.4 | 2013-08-01 | ||
| CN201320467665 | 2013-08-01 | ||
| CN201410283537.3A CN104338523A (en) | 2013-08-01 | 2014-06-23 | Titanium dioxide photocatalyst structure |
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| CN104338523A true CN104338523A (en) | 2015-02-11 |
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| CN201420337206.9U Active CN204247228U (en) | 2013-08-01 | 2014-06-23 | The structure of photocatalyst of titanium dioxide |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385967A (en) * | 2008-10-15 | 2009-03-18 | 张家港市普生光电有限公司 | Preparation method of nano titanic oxide film for photochemical catalyst |
| US20090110591A1 (en) * | 2002-05-07 | 2009-04-30 | John Michael Guerra | Stress-induced bandgap-shifted semiconductor photoelectrolytic/photocatalytic/photovoltaic surface and method for making same |
| CN101913777A (en) * | 2010-07-20 | 2010-12-15 | 河北师范大学 | Method for preparing nano TiO2 thin films |
| CN102151560A (en) * | 2011-01-25 | 2011-08-17 | 北京师范大学 | Titanium dioxide photonic crystal film for photocatalytic degradation of organic matters |
-
2014
- 2014-06-23 CN CN201410283537.3A patent/CN104338523A/en active Pending
- 2014-06-23 CN CN201420337206.9U patent/CN204247228U/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090110591A1 (en) * | 2002-05-07 | 2009-04-30 | John Michael Guerra | Stress-induced bandgap-shifted semiconductor photoelectrolytic/photocatalytic/photovoltaic surface and method for making same |
| CN101385967A (en) * | 2008-10-15 | 2009-03-18 | 张家港市普生光电有限公司 | Preparation method of nano titanic oxide film for photochemical catalyst |
| CN101913777A (en) * | 2010-07-20 | 2010-12-15 | 河北师范大学 | Method for preparing nano TiO2 thin films |
| CN102151560A (en) * | 2011-01-25 | 2011-08-17 | 北京师范大学 | Titanium dioxide photonic crystal film for photocatalytic degradation of organic matters |
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Inventor after: Lv Lifang Inventor after: Chen Yuwen Inventor before: Chen Yuwen |
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Application publication date: 20150211 |