CN107586473A - A kind of coating using bismuth titanates as photochemical catalyst and preparation method thereof - Google Patents
A kind of coating using bismuth titanates as photochemical catalyst and preparation method thereof Download PDFInfo
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- CN107586473A CN107586473A CN201710997807.0A CN201710997807A CN107586473A CN 107586473 A CN107586473 A CN 107586473A CN 201710997807 A CN201710997807 A CN 201710997807A CN 107586473 A CN107586473 A CN 107586473A
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Abstract
The invention provides a kind of coating using bismuth titanates as photochemical catalyst and preparation method thereof, the raw material of the coating includes：Glycolic acid aqueous solution, sodium silicate aqueous solution, nanometer bismuth titanate, white carbon and water；Nanometer bismuth titanate is made using solid phase method.The preparation method of the coating is that glycolic acid aqueous solution first is added into sodium silicate aqueous solution, adds nanometer bismuth titanate and white carbon, is stirring evenly and then adding into water, be dispersed with stirring, produces.Coating provided by the invention using bismuth titanates as photochemical catalyst is while ensureing that it has preferable water resistance, wearability and cohesive force, also with visible light with regard to the ability of photocatalytic degradation can be carried out and with preferable effect, and there is low cost, efficiency high, practical.
Description
Technical field
The invention belongs to technical field of chemical paint, and in particular to a kind of coating using bismuth titanates as photochemical catalyst and its
Preparation method.
Background technology
Aqueous inorganic paint is nontoxic, tasteless using water as medium, does not contain volatile and other organic substances, and former material
Material is abundant, easy for construction, price is relatively low.The hardness of aqueous inorganic paint is very high, and wearability is good, but its water resistance and cohesive force
It is poor, hinder its extensive use.In addition, in terms of environmental improvement, with country to developing in a healthy way, Green Development it is further
It is required that photocatalysis technology, because it is using sunshine as energy source, energy consumption is low, and oxidability is strong, efficiency high and do not produce secondary
Pollution is got the attention.
In recent years, photocatalysis technology has begun to apply in purification of air and water treatment field.And by photochemical catalyst with applying
Layer material is combined, and prepares the coating with photocatalysis effect, by can the needs of improvement and the daily life of environment are tighter
Close is combined together.Manufactured photocatalyst coating is such as coated on road surface, hard shoulder, roadside edge, railing, can be effective
Absorb and decompose automobile exhaust, and this also by be administer motor vehicle exhaust emission pollution a kind of research direction.But the light currently used
Catalyst is mainly the photochemical catalyst that titanium dioxide etc. has significant limitations.Its light sensation is indifferent, greater band gap, and electricity
It is very high that sub- hole merges speed, causes it not use and accounts for sunshine and can be up to 95 percent visible ray, only can be with
By ultraviolet excitation of the wavelength within 368.5 nm scopes, its disposal efficiency is significantly limit, in addition, it also has amount
The shortcomings of sub- efficiency is low, the recombination rate of semiconductor carriers is high.
So we need to be combined a kind of more outstanding photochemical catalyst with coating material, the metatitanic acid used such as the present invention
Bismuth, it not only can be being carried out photocatalysis under ultraviolet light, can equally be carried out under the irradiation of visible ray, improve light drop
Efficiency is solved, produces more outstanding photocatalyst coating.
The content of the invention
It is an object of the invention to provide a kind of coating using bismuth titanates as photochemical catalyst and preparation method thereof, is ensureing it
While with preferable water resistance, wearability and cohesive force, make it have under visible light with regard to photocatalytic degradation can be carried out
Ability and there is preferable effect.
A kind of coating using bismuth titanates as photochemical catalyst, raw material be calculated in mass percent including：Glycolic acid aqueous solution 8%-
15%, sodium silicate aqueous solution 20%-40%, nanometer bismuth titanate 2%-5%, white carbon 22%-28%, surplus are water；The quality of the raw material
Percentage summation is 100%.
Preferably, the mass fraction of the glycolic acid aqueous solution is 10%-30%.
Preferably, the mass fraction of the sodium silicate aqueous solution is 60%-80%.
Preferably, the crystal formation of the nanometer bismuth titanate is Ca-Ti ore type.
Preferably, the primary particle size of the nanometer bismuth titanate is 1-5 μm.
Preferably, the nanometer bismuth titanate is prepared by following methods：Take bismuth oxide, P25 type nano titanium oxides
Grinding is uniform, and the powder after grinding is transferred in quartz boat and calcined, and washes obtained product after cooling and dries, produces
To nanometer bismuth titanate.
Preferably, the mol ratio of bismuth oxide and P25 type nano titanium oxides is 6：1.
Preferably, calcining heat is 600 DEG C, calcination time 1h.
The above-mentioned preparation method using bismuth titanates as the coating of photochemical catalyst, comprise the following steps：By glycolic acid aqueous solution
Add in sodium silicate aqueous solution, nanometer bismuth titanate and white carbon are added after mixing, stirring, water is added, is produced after being dispersed with stirring.
Utilize X-ray diffractometer（XRD）, UV-vis spectroscopy degree meter（DRS）Structure is carried out to the bismuth titanates of manufacture and can
See that light absorpting ability is analyzed, photocatalytic degradation experiment is carried out by target contaminant of nitrogen dioxide, to assess its photocatalytic activity.
Glycolic in photocatalyst coating provided by the invention has stronger polarity, hydrophily, can dissolve organic
The inorganic matter such as thing and water, dispersant can be used as.After sodium silicate aqueous solution mixes with a certain amount of glycolic and white carbon, it can make
Low-temperature setting inorganic coating, the coating and metal, cement, masonry etc. has a good adhesion, and has stronger resistance to
The characteristic such as water, acidproof, corrosion-resistant, weather-proof, high temperature resistant.
Nanometer bismuth titanate is Ca-Ti ore type, by that can absorb energy after the irradiation of sunshine, makes catalyst excite to form tool
There is the electron hole pair of Strong oxdiative reducing power, these electron holes are moved to its top layer, and the molecular structure of pollutant is carried out
Destroy, the pollutant in the air that can more thoroughly degrade, such as vehicle exhaust, formaldehyde, and also have very strong sterilizing ability.And
Itself is harmless, is a kind of new material of health environment-friendly.
Compared with prior art, the present invention has advantages below：
（1）The primary raw material abundance of coating, there is preferable water resistance and caking property；
（2）Because the energy gap of bismuth titanates is narrower and can easily be accommodated, significantly more efficient can be utilized compared to existing material can
See light, photocatalytic degradation effect greatly improves, effective to handle air pollution situation.
（3）Obtained coating is widely used, easy for construction, and technological parameter is easily controlled.
Brief description of the drawings
Fig. 1 is the XRD diffraction spectrograms of nanometer bismuth titanate in embodiment 1, and diffraction maximum is the feature diffraction of bismuth titanates in figure
Peak；
Fig. 2 is the solid violet external curve of nanometer bismuth titanate and titanium dioxide in embodiment 1；
Fig. 3 is traditional titanium dioxide optical catalyst coating and the bismuth titanate photocatalyst coating degraded nitrogen dioxide of embodiment 1
When m- degradation rate graph of a relation.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Embodiment 1
It is 6 to take mol ratio:In mortar, grinding is uniform by 1 bismuth oxide, P25.Pale yellow powder after grinding is transferred to quartz
In boat, 1h is calcined at 600 DEG C, after being cooled to room temperature, obtained product is washed and dried, nanometer bismuth titanate is made.
Bismuth titanate photocatalyst coating is prepared by following steps：The glycolic acid aqueous solution that 11g mass concentrations are 20% is added to
30g mass fractions are to be mixed in 70% sodium silicate aqueous solution；Take the nanometer that 3.5g crystal formations are Ca-Ti ore type and particle diameter is 2-4 μm
Bismuth titanates and 25g white carbons are added in above-mentioned mixed liquor, stirring a period of time, after being uniformly dispersed；31.5g water is eventually adding, then
25 minutes are stirred up to being uniformly dispersed with 200 revs/min of rotating speed, that is, obtain target coating.
Fig. 1 is the XRD diffraction spectrograms of obtained nanometer bismuth titanate, and the peak of each position belongs to bismuth titanates in figure, does not have
Other impurities peak occurs, contrast standard JCPDS cards (21-1272), it may be determined that for the good bismuth titanate powder of crystallinity.
Fig. 2 is the solid violet external curve of obtained nanometer bismuth titanate and titanium dioxide, prepared compared with titanium dioxide
Nanometer bismuth titanate sample also has stronger absorbability in visible-range.This explanation nanometer bismuth titanate photochemical catalyst can be by
Excited by visible light, so as to which the activity of stronger photocatalysis degradation organic contaminant can be possessed under visible light.
Embodiment 2
It is 6 to take mol ratio:In mortar, grinding is uniform by 1 bismuth oxide, P25.Pale yellow powder after grinding is transferred to quartz
In boat, 1h is calcined at 600 DEG C, after being cooled to room temperature, obtained product is washed and dried, nanometer bismuth titanate is made.
Bismuth titanate photocatalyst coating is prepared by following steps：The glycolic acid aqueous solution that 8g mass concentrations are 30% is added to
40g mass fractions are to be mixed in 60% sodium silicate aqueous solution；Take the nano-titanium that 2g crystal formations are Ca-Ti ore type and particle diameter is 1-3 μm
Sour bismuth and 22g white carbon is added in above-mentioned mixed liquor, stirring a period of time, after being uniformly dispersed；28g water is eventually adding, then with 200
Rev/min rotating speed stir 25 minutes until be uniformly dispersed, that is, obtain target coating.
Embodiment 3
It is 6 to take mol ratio:In mortar, grinding is uniform by 1 bismuth oxide, P25.Pale yellow powder after grinding is transferred to quartz
In boat, 1h is calcined at 600 DEG C, after being cooled to room temperature, obtained product is washed and dried, nanometer bismuth titanate is made.
Bismuth titanate photocatalyst coating is prepared by following steps：The glycolic acid aqueous solution that 10g mass concentrations are 25% is added to
35g mass fractions are to be mixed in 65% sodium silicate aqueous solution；Take the nano-titanium that 3g crystal formations are Ca-Ti ore type and particle diameter is 3-5 μm
Sour bismuth and 24g white carbon is added in above-mentioned mixed liquor, stirring a period of time, after being uniformly dispersed；28g water is eventually adding, then with 200
Rev/min rotating speed stir 25 minutes until be uniformly dispersed, that is, obtain target coating.
Embodiment 4
It is 6 to take mol ratio:In mortar, grinding is uniform by 1 bismuth oxide, P25.Pale yellow powder after grinding is transferred to quartz
In boat, 1h is calcined at 600 DEG C, after being cooled to room temperature, obtained product is washed and dried, nanometer bismuth titanate is made.
Bismuth titanate photocatalyst coating is prepared by following steps：The glycolic acid aqueous solution that 12g mass concentrations are 15% is added to
25g mass fractions are to be mixed in 75% sodium silicate aqueous solution；Take the nano-titanium that 4g crystal formations are Ca-Ti ore type and particle diameter is 1-3 μm
Sour bismuth and 27g white carbon is added in above-mentioned mixed liquor, stirring a period of time, after being uniformly dispersed；32g water is eventually adding, then with 200
Rev/min rotating speed stir 25 minutes until be uniformly dispersed, that is, obtain target coating.
Embodiment 5
It is 6 to take mol ratio:In mortar, grinding is uniform by 1 bismuth oxide, P25.Pale yellow powder after grinding is transferred to quartz
In boat, 1h is calcined at 600 DEG C, after being cooled to room temperature, obtained product is washed and dried, nanometer bismuth titanate is made.
Bismuth titanate photocatalyst coating is prepared by following steps：The glycolic acid aqueous solution that 15g mass concentrations are 10% is added to
20g mass fractions are to be mixed in 80% sodium silicate aqueous solution；Take the nano-titanium that 5g crystal formations are Ca-Ti ore type and particle diameter is 2-4 μm
Sour bismuth and 28g white carbon is added in above-mentioned mixed liquor, stirring a period of time, after being uniformly dispersed；32g water is eventually adding, then with 200
Rev/min rotating speed stir 25 minutes until be uniformly dispersed, that is, obtain target coating.
The above-mentioned coating that embodiment 1 provides is coated on glass plate and carries out curing conservation.
Using with ultraviolet filter（420nm）350W xenon arc lamps as visible light source, the glass plate of film is placed
The degradation experiment of nitrogen dioxide is carried out in photocatalysis test box, the initial concentration of nitrogen dioxide is 9.3mg/m in container3, inspection
Survey the light degradation situation that device persistently detects nitrogen dioxide gas.From the figure 3, it may be seen that prepared bismuth titanate photocatalyst coating exists
96% has been reached to the degradation rate of nitrogen dioxide in 120min.
Claims (9)
- A kind of 1. coating using bismuth titanates as photochemical catalyst, it is characterised in that：Raw material be calculated in mass percent including：Glycolic Aqueous solution 8%-15%, sodium silicate aqueous solution 20%-40%, nanometer bismuth titanate 2%-5%, white carbon 22%-28%, surplus are water；It is described The mass percent summation of raw material is 100%.
- 2. the coating according to claim 1 using bismuth titanates as photochemical catalyst, it is characterised in that：The glycolic is water-soluble The mass fraction of liquid is 10%-30%.
- 3. the coating according to claim 1 using bismuth titanates as photochemical catalyst, it is characterised in that：The sodium metasilicate is water-soluble The mass fraction of liquid is 60%-80%.
- 4. the coating according to claim 1 using bismuth titanates as photochemical catalyst, it is characterised in that：The nanometer bismuth titanate Crystal formation be Ca-Ti ore type.
- 5. the coating according to claim 1 using bismuth titanates as photochemical catalyst, it is characterised in that：The nanometer bismuth titanate Primary particle size be 1-5 μm.
- 6. the coating according to claim 1 using bismuth titanates as photochemical catalyst, it is characterised in that：The nanometer bismuth titanate It is to be prepared by following methods：Take bismuth oxide, the grinding of P25 types nano titanium oxide uniform, the powder after grinding is transferred to Calcined in quartz boat, obtained product is washed after cooling and dried, that is, obtains nanometer bismuth titanate.
- 7. the coating according to claim 6 using bismuth titanates as photochemical catalyst, it is characterised in that：Bismuth oxide and P25 types The mol ratio of nano titanium oxide is 6：1.
- 8. the coating according to claim 6 using bismuth titanates as photochemical catalyst, it is characterised in that：Calcining heat is 600 DEG C, calcination time 1h.
- 9. the preparation method using bismuth titanates as the coating of photochemical catalyst described in claim 1, it is characterised in that：Including following Step：Glycolic acid aqueous solution is added in sodium silicate aqueous solution, nanometer bismuth titanate and white carbon, stirring are added after mixing, then add Enter water, produced after being dispersed with stirring.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214740A (en) * | 2021-06-03 | 2021-08-06 | 亚士漆(上海)有限公司 | Light-reflecting transparent heat-insulating coating, preparation method thereof and light-reflecting heat-insulating top coat |
| CN115870010A (en) * | 2022-10-09 | 2023-03-31 | 苏州大学 | Bismuth titanate nanosheet/UiO-66-NH containing bismuth vacancies 2 Heterojunction and preparation method and application thereof |
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| CN101574653A (en) * | 2009-06-11 | 2009-11-11 | 山东大学 | Bismuth titanate photocatalytic material with visible light response and preparation method thereof |
| CN105462409A (en) * | 2015-11-30 | 2016-04-06 | 洛阳绿仁环保设备有限公司 | Photocatalyst coating and preparation method thereof |
| CN107008248A (en) * | 2017-05-18 | 2017-08-04 | 江苏大学 | A kind of black Bi4Ti3O12The preparation method of photochemical catalyst |
| CN107213888A (en) * | 2017-05-18 | 2017-09-29 | 江苏大学 | It is a kind of that there is good visible light-responded two-dimentional Bi12TiO20The preparation method of nanometer sheet |
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Patent Citations (4)
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| CN101574653A (en) * | 2009-06-11 | 2009-11-11 | 山东大学 | Bismuth titanate photocatalytic material with visible light response and preparation method thereof |
| CN105462409A (en) * | 2015-11-30 | 2016-04-06 | 洛阳绿仁环保设备有限公司 | Photocatalyst coating and preparation method thereof |
| CN107008248A (en) * | 2017-05-18 | 2017-08-04 | 江苏大学 | A kind of black Bi4Ti3O12The preparation method of photochemical catalyst |
| CN107213888A (en) * | 2017-05-18 | 2017-09-29 | 江苏大学 | It is a kind of that there is good visible light-responded two-dimentional Bi12TiO20The preparation method of nanometer sheet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214740A (en) * | 2021-06-03 | 2021-08-06 | 亚士漆(上海)有限公司 | Light-reflecting transparent heat-insulating coating, preparation method thereof and light-reflecting heat-insulating top coat |
| CN113214740B (en) * | 2021-06-03 | 2022-07-26 | 亚士漆(上海)有限公司 | Light-reflecting transparent heat-insulating coating, preparation method thereof and light-reflecting heat-insulating top coat |
| CN115870010A (en) * | 2022-10-09 | 2023-03-31 | 苏州大学 | Bismuth titanate nanosheet/UiO-66-NH containing bismuth vacancies 2 Heterojunction and preparation method and application thereof |
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