CN106474822A - A kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating - Google Patents
A kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating Download PDFInfo
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- CN106474822A CN106474822A CN201610969441.1A CN201610969441A CN106474822A CN 106474822 A CN106474822 A CN 106474822A CN 201610969441 A CN201610969441 A CN 201610969441A CN 106474822 A CN106474822 A CN 106474822A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
Abstract
The invention discloses a kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating, comprise the steps：(1) butyl titanate that purity is more than 98% is configured to butyl titanate solution, ethanol water is added to butyl titanate solution, is thoroughly mixed reaction；(2) material filtering of step (1) gained is obtained filter cake, and carry out remove impurity；(3) material of step (2) gained is configured to solution again；(4) acid is added to carry out acidolysis in the solution of step (3) gained；(5) add thickening agent in the material of step (4) gained, stable nano titanic oxide sol is obtained；(6) by uniform for above-mentioned nano titanic oxide sol dip loading in the internal face of coating composite ceramicses base substrate, dry green compact must be dried；(7) green compact under noble gases or nitrogen protection heat preservation sintering is dried by above-mentioned, obtains the composite ceramic filter core of described loaded optic catalyst coating.The composite ceramic filter core of the loaded optic catalyst coating of present invention preparation has good photo-catalysis capability, uses in conjunction with uviol lamp, can kill antibacterial, degradation of organic substances, effectively reduces the COD content of water outlet it is ensured that going out water security.
Description
Technical field
Technical field of water purification of the present invention is and in particular to a kind of preparation side of the composite ceramic filter core of loaded optic catalyst coating
Method.
Background technology
The pollutant of drinking water mainly have antibacterial (such as escherichia coli), Organic substance (for example to contain chlorohydrocarbon, benzene class chemical combination
Thing) and heavy metal ion (such as lead, cadmium).Our tap waters used in everyday in sterilisation process, a part of Organic substance
Combine to form carcinogenic organic chloride (as chloroform) with free chlorine, microorganism in this Outer Tube also can be bred again, these
All have impact on the quality of water, therefore generally require and can drink through being further purified process.The water that the suitable mankind drink is not
More pure better, trace element plays vital in the growth course of people's skeleton, nervous system, metabolic system etc.
Effect, and what these trace element mainly drew from drinking water.Therefore in water treatment procedure, will retain these has as far as possible
The mineral of benefit.Existing ceramic water purification apparatus can be while removing antibacterial, Organic substance, heavy metal ion, and retaining human body must
The trace element of palpus, therefore extensively should be used as family's drinking water purification device.
Existing major part water purifier due to filtered the chlorine residue in tap water be easily caused water outlet antibacterial exceeded.At present
Partially purifying water machine on the market ensures water security using ultraviolet lamp sterilization.But there is both sides defect in ultraviolet disinfection,
First, the antibacterial that uviol lamp is killed has the risk that there is photoreactivation under visible light illumination.2nd, ultraviolet kill antibacterial corpse still
Remain in water.Principle using optically catalytic TiO 2 can decomposing organic matter further.
Titanium dioxide has good photochemical properties, under the irradiation of ultraviolet light, activates the oxygen in water, produces active oxygen
With the group of hydroxyl radical free radical grade high oxidation susceptibility, being capable of effectively degradation of organic substances and environmental contaminants.When photocatalytic applications in
During water process, common occupation mode is stationary state and suspended state.Stationary state is using side physically or chemically by titanium dioxide
Formula is carried on the material surface with given shape, such as corrosion resistant plate, stainless (steel) wire, glass etc..Because photocatalyst ion is born
It is loaded on fixing carrier material, therefore photocatalyst is separated simply with water, but the connecing of the photocatalyst of stationary state and water
Touch insufficient, therefore purification efficiency is low.Suspended state is to be dispersed in water photocatalyst powder body or granule, and purification efficiency is high, but by
It is dispersed in water in photocatalyst, photocatalyst separates relatively difficult with water, has the shortcomings that recovery difficult is big.Cause
This, preparation meets the easy recovery of photocatalyst simultaneously and the high material of photocatalysis efficiency will have very big application space.
Content of the invention
It is an object of the invention to overcoming prior art defect, a kind of composite ceramicses of loaded optic catalyst coating are provided to filter
The preparation method of core.
Technical scheme is as follows：
A kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating, comprises the steps：
(1) butyl titanate that purity is more than 98% is dissolved in ethanol, and the butyl titanate being configured to 0.01～1mol/L is molten
Liquid, the ethanol water that concentration is 90～100% is added to butyl titanate solution, is thoroughly mixed reaction, is used
Butyl titanate solution and ethanol solution weight than for 1～100: 100；
(2) material filtering of step (1) gained is obtained filter cake, and carry out remove impurity；
(3) material of step (2) gained is configured to the solution that concentration is 0.01～1mol/L again；
(4) acid is added to carry out acidolysis in the solution of step (3) gained, the addition of acid is the 0.01～2% of solution；
(5) add thickening agent in the material of step (4) gained, stable nano titanic oxide sol is obtained；
(6) by uniform for above-mentioned nano titanic oxide sol dip loading coating composite ceramicses base substrate internal face, and
In 60～100 DEG C of drying 3～48h, green compact must be dried, this coating composite ceramicses base substrate be one by one end seal close, another end opening
Hollow cylinder, its preparation method comprises the steps：
A, by kieselguhr, nano active carbon powder, dispersant, nano silver antimicrobials and deionized water with 1000: 30～
1500: 1～20: 0～50: 1000-2000 weight carries out ball milling than mixing, and first slurry is obtained；
B, flocculant and stabilizer are added in above-mentioned first slurry, continuing ball milling makes flocculant and stabilizer uniformly divide
Dissipate, obtain stable Part I flocculated slurry；
C, by above-mentioned Part I flocculated slurry ripening, then drain casting molding in mould, the demoulding simultaneously puts into baking oven
One end closing, the composite ceramicses green compact of the hollow cylinder shape of another end opening are obtained after drying；
D, kieselguhr, dispersant and deionized water are carried out ball with 1000: 1～20: 1000～2000 weight than mixing
Mill, is obtained the second slurry；
E, flocculant and stabilizer are added in above-mentioned second slurry, continuing ball milling makes flocculant and stabilizer uniformly divide
Dissipate, obtain stable Part II flocculated slurry；
F, by Part II flocculated slurry ripening, the Part II flocculated slurry after ripening is carried on above-mentioned composite ceramicses
The inner and outer surfaces of green compact, obtain final product described coating composite ceramicses base substrate after being dried；
(7) by the above-mentioned green compact that are dried under noble gases or nitrogen are protected, in 450～950 DEG C of heat preservation sintering 1～30h, so
After cool to room temperature with the furnace, obtain the composite ceramic filter core of described loaded optic catalyst coating.
In a preferred embodiment of the invention, the speed of the stirring in described step (1) is 500～3000rpm,
Mixing time is 5～300min.
In a preferred embodiment of the invention, the medium used by remove impurity of described step (2) is ethanol, deionization
Water or ethanol deionized water solution.
In a preferred embodiment of the invention, the acid of described step (4) be hydrochloric acid, in nitric acid and sulphuric acid at least
A kind of.
In a preferred embodiment of the invention, described thickening agent is polyvinyl alcohol, Radix Acaciae senegalis or carboxymethyl
Sodium cellulosate.
In a preferred embodiment of the invention, described noble gases are argon, helium or radon gas.
Beneficial effects of the present invention：
1st, the raw material of the present invention using purity be more than 98% butyl titanate it is ensured that the water after filtering be not subject to can in raw material
The pollution of the harmful substance that can exist.
2nd, the nano-titania particle in the present invention is little, particle narrowly distributing, is favorably improved the photocatalysis of titanium dioxide
Effect.
3rd, in the present invention, the surface energy of the nano-titania particle of preparation is big, can synthesize in low-temperature sintering, after sintering and
Coating composite ceramicses base substrate is well combined.
4th, the nanometer titanium dioxide coating in the present invention is supported on the inner surface of composite ceramicses base substrate, in gained composite ceramicses
Filter element filtering goes to allow catalyst fully contact with water while debris in eliminating water, preferably plays light-catalysed effect, it is to avoid
The recovery problem of other catalysis materials.
5th, the composite ceramic filter core of the loaded optic catalyst coating of present invention preparation has good photo-catalysis capability, in conjunction with
Uviol lamp uses, and can kill antibacterial, degradation of organic substances, effectively reduces the COD content of water outlet it is ensured that going out water security.
The composite ceramic filter core water purification flow velocity of the loaded optic catalyst coating that the 6th, the present invention is obtained is big, using the pressure of tap water
Power just can have outstanding filter effect.
Specific embodiment
Below by way of specific embodiment, technical scheme is further detailed and describes.
The preparation method of the coating composite ceramicses base substrate used by following each embodiments comprises the steps：
1st, successively by 1000g particle mean size be 30 μm kieselguhr, 300g particle mean size be 15 μm of active carbon powder, 5g
Waterglass and 3g nano silver antimicrobials, 1.5L deionized water load in ball grinder, after ball grinder is sealed, with the speed of 80rpm
Degree carries out ball milling 8h, obtains scattered first slurry.
2nd, open above-mentioned ball grinder, add 5g sanlose and 30g calcium-base bentonite, then with 80rpm's
Speed continues ball milling 3h, obtains stable Part I flocculated slurry.
3rd, Part I flocculated slurry is stood 12h ripening, be subsequently poured in gypsum mold, stand 15 minutes, then will
Remaining slurry is poured out in plaster mold upset；Keep mould to reverse, stand 180 minutes, the demoulding after putting into 80 DEG C of oven drying 10h
Obtain diameter 50mm, wall thickness 6.5mm, length 250mm, one end is closed, the composite ceramicses green compact of the open column shape of another end opening.
4th, successively by 1000g particle mean size be 30 μm kieselguhr, 5g waterglass, 1L deionized water load ball grinder, will
After ball grinder sealing, ball milling 10h is carried out with the speed of 80rpm, obtain scattered second slurry.
5th, open above-mentioned ball grinder, add 5g sanlose and 30g calcium-base bentonite, then with 80rpm's
Speed continues ball milling 3h, obtains stable Part II flocculated slurry.
6th, Part II flocculated slurry is stood 12h ripening, the Part II flocculated slurry after ripening is imported composite ceramic
Inside porcelain green compact, stand 1min, pour out additional size, after standing 1min, put into 80 DEG C of oven for drying 4h, compound after drying
Impregnate outer layer 1min in ceramic green insertion ceramic size, take out, put into 80 DEG C of oven for drying after face coat moisture drying
6h, obtains described coating composite ceramicses base substrate.
Embodiment 1
(1) butyl titanate that 20g purity is more than 98% is dissolved in 1L ethanol and obtains butyl titanate solution, and 1L concentration is
99% ethanol water is slowly dropped in above-mentioned butyl titanate solution, is thoroughly mixed reaction 3h, the speed of stirring is 500
～3000rpm；
(2) the material filter paper filtering of step (1) gained is obtained filter cake, and with ethanol, deionized water interval cleaning 3 times with
Remove impurity；
(3) material of step (2) gained is redissolved in 1L deionized water, obtains solution；
(4) 5mL nitric acid is added to carry out acidolysis in the solution of step (3) gained；
(5) add the deionized water solution of 50mL 2%PVA in the material of step (4) gained, stable nanometer is obtained
TiO 2 sol；
(6) above-mentioned nano titanic oxide sol is poured into dipping 30s in above-mentioned coating composite ceramicses base substrate cavity, pour out many
Remaining TiO 2 sol, and 10h is dried in 80 DEG C of baking oven, green compact must be dried；
(7) green compact are dried under nitrogen protection by above-mentioned, with the programming rate temperature of 2 DEG C/min to 650 DEG C, protect in 650 DEG C
Temperature sintering 5h, then cools to room temperature with the furnace, obtains the composite ceramic filter core of described loaded optic catalyst coating.
Found to after prepared composite ceramic filter core detection with porosimeter, the porosity 58% of filter element；To make again
The composite ceramic filter core wall obtaining is cut into the strip of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength
14MPa；In the present invention, using one end closing, the composite ceramic filter core of other end opening carries out the filter effect of gravity filtration
Detection, unfiltered water is added in composite ceramic filter core, then enters chlorine residue to the water after the filtration infiltrating in filter element
Clearance, lead ion clearance, the analysis detection of naked eyes visible, turbidity and ceramic element open-cell porosity, residual chlorine in water
Remove the ＞ 99% that dechlorinates；Lead clearance ＞ 99%；It is visible by naked eyes thing；Turbidity ＜ 0.1NTU；The loaded optic catalyst of the present invention
Composite ceramic filter core carries out sterilization and the experiment of COD clearance, removal of bacteria rate ＞ 99.9%, the clearance of COD with reference to uviol lamp
＞ 75%.
Embodiment 2
(1) butyl titanate that 80g purity is more than 98% is dissolved in 1L ethanol and obtains butyl titanate solution, and 2L concentration is
96% ethanol water is slowly dropped in above-mentioned butyl titanate solution, is thoroughly mixed reaction 5h, the speed of stirring is 500
～3000rpm；
(2) the material filter paper filtering of step (1) gained is obtained filter cake, and with ethanol purge 4 times with remove impurity；
(3) material of step (2) gained is redissolved in 1L deionized water, obtains solution；
(4) 20mL nitric acid is added to carry out acidolysis in the solution of step (3) gained；
(5) add the deionized water solution of 80mL 1.5%PVA in the material of step (4) gained, stable receive is obtained
Rice TiO 2 sol；
(6) above-mentioned nano titanic oxide sol is poured into dipping 120s in above-mentioned coating composite ceramicses base substrate cavity, pour out
Unnecessary TiO 2 sol, and 6h is dried in 100 DEG C of baking oven, green compact must be dried；
(7) green compact are dried under nitrogen protection by above-mentioned, with the programming rate temperature of 2 DEG C/min to 750 DEG C, protect in 750 DEG C
Temperature sintering 3h, then cools to room temperature with the furnace, obtains the composite ceramic filter core of described loaded optic catalyst coating.
Found to after prepared composite ceramic filter core detection with porosimeter, the porosity 62% of filter element；To make again
The composite ceramic filter core wall obtaining is cut into the strip of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength
16MPa；In the present invention, using one end closing, the filter element of other end opening carries out the filter effect detection of gravity filtration, will not
The water filtering is added in composite ceramic filter core, then enters chlorine residue clearance, lead to the water after the filtration infiltrating in filter element
Ion remaval rate, the analysis detection of naked eyes visible, turbidity and ceramic element open-cell porosity, in water, residual chlorine removes the ＞ that dechlorinates
99%；Lead clearance ＞ 99%；It is visible by naked eyes thing；Turbidity ＜ 0.1NTU；The loaded optic catalyst composite ceramicses of the present invention
Filter element carries out sterilization and the experiment of COD clearance, removal of bacteria rate ＞ 99.9%, the clearance ＞ 85% of COD with reference to uviol lamp.
Embodiment 3
(1) butyl titanate that 10g purity is more than 98% is dissolved in 1L ethanol and obtains butyl titanate solution, and 0.5L concentration is
98% ethanol water is slowly dropped in above-mentioned butyl titanate solution, is thoroughly mixed reaction 1h, the speed of stirring is 500
～3000rpm；
(2) the material filter paper filtering of step (1) gained is obtained filter cake, and deionized water cleans 5 times with remove impurity；
(3) material of step (2) gained is redissolved in 5L deionized water, obtains solution；
(4) 3mL nitric acid is added to carry out acidolysis in the solution of step (3) gained；
(5) add the deionized water solution of 100mL 2%PVA in the material of step (4) gained, stable nanometer is obtained
TiO 2 sol；
(6) above-mentioned nano titanic oxide sol is poured into dipping 2000s in above-mentioned coating composite ceramicses base substrate cavity, pour out
Unnecessary TiO 2 sol, and 15h is dried in 60 DEG C of baking oven, green compact must be dried；
(7) green compact are dried under nitrogen protection by above-mentioned, with the programming rate temperature of 2 DEG C/min to 800 DEG C, protect in 800 DEG C
Temperature sintering 4h, then cools to room temperature with the furnace, obtains the composite ceramic filter core of described loaded optic catalyst coating.
Found to after prepared composite ceramic filter core detection with porosimeter, the porosity 63% of filter element；To make again
The composite ceramic filter core wall obtaining is cut into the strip of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength
22MPa；In the present invention, using one end closing, the filter element of other end opening carries out the filter effect detection of gravity filtration, will not
The water filtering is added in composite ceramic filter core, then enters chlorine residue clearance, lead to the water after the filtration infiltrating in filter element
Ion remaval rate, the analysis detection of naked eyes visible, turbidity and ceramic element open-cell porosity, the ＞ that dechlorinates is removed in chlorine residue in water
99%；Lead clearance ＞ 99%；It is visible by naked eyes thing；Turbidity ＜ 0.1NTU；The loaded optic catalyst composite ceramicses of the present invention
Filter element carries out sterilization and the experiment of COD clearance, removal of bacteria rate ＞ 99.9%, the clearance ＞ 85% of COD with reference to uviol lamp.
Embodiment 4
(1) butyl titanate that 150g purity is more than 98% is dissolved in 1L ethanol and obtains butyl titanate solution, and 6L concentration is
99% ethanol water is slowly dropped in above-mentioned butyl titanate solution, is thoroughly mixed reaction 3h, the speed of stirring is 500
～3000rpm；
(2) the material filter paper filtering of step (1) gained is obtained filter cake, and with ethanol, deionized water interval cleaning 3 times with
Remove impurity；
(3) material of step (2) gained is redissolved in 1L deionized water, obtains solution；
(4) 15mL nitric acid is added to carry out acidolysis in the solution of step (3) gained；
(5) add the deionized water solution of 60mL 1% sodium carboxymethyl cellulose in the material of step (4) gained, be obtained
Stable nano titanic oxide sol；
(6) above-mentioned nano titanic oxide sol is poured into dipping 300s in above-mentioned coating composite ceramicses base substrate cavity, pour out
Unnecessary TiO 2 sol, and 10h is dried in 80 DEG C of baking oven, green compact must be dried；
(7) green compact are dried under nitrogen protection by above-mentioned, with the programming rate temperature of 3 DEG C/min to 900 DEG C, protect in 900 DEG C
Temperature sintering 3h, then cools to room temperature with the furnace, obtains the composite ceramic filter core of described loaded optic catalyst coating.
Found to after prepared composite ceramic filter core detection with porosimeter, the porosity 63% of filter element；To make again
The composite ceramic filter core wall obtaining is cut into the strip of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength
28MPa；In the present invention, using one end closing, the filter element of other end opening carries out the filter effect detection of gravity filtration, will not
The water filtering is added in composite ceramic filter core, then enters chlorine residue clearance, lead to the water after the filtration infiltrating in filter element
Ion remaval rate, the analysis detection of naked eyes visible, turbidity and ceramic element open-cell porosity, in water, residual chlorine removes the ＞ that dechlorinates
99%；Lead clearance ＞ 99%；It is visible by naked eyes thing；Turbidity ＜ 0.1NTU；The loaded optic catalyst composite ceramicses of the present invention
Filter element carries out sterilization and the experiment of COD clearance, removal of bacteria rate ＞ 99.9%, the clearance ＞ 88% of COD with reference to uviol lamp.
Those of ordinary skill in the art understand, when technical scheme changes in parameters described below and compositional range,
Remain able to obtain same as the previously described embodiments or close technique effect, still fall within protection scope of the present invention：
A kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating, comprises the steps：
(1) butyl titanate that purity is more than 98% is dissolved in ethanol, and the butyl titanate being configured to 0.01～1mol/L is molten
Liquid, the ethanol water that concentration is 90～100% is added to butyl titanate solution, is thoroughly mixed reaction, is used
Butyl titanate solution and ethanol solution weight than for 1～100: 100；
(2) material filtering of step (1) gained is obtained filter cake, and carry out remove impurity；
(3) material of step (2) gained is configured to the solution that concentration is 0.01～1mol/L again；
(4) acid is added to carry out acidolysis in the solution of step (3) gained, the addition of acid is the 0.01～2% of solution；
(5) add thickening agent in the material of step (4) gained, stable nano titanic oxide sol is obtained；
(6) by uniform for above-mentioned nano titanic oxide sol dip loading coating composite ceramicses base substrate internal face, and
In 60～100 DEG C of drying 3～48h, green compact must be dried, this coating composite ceramicses base substrate is closed for one end, the sky of another end opening
Stem body, its preparation method comprises the steps：
A, by kieselguhr, nano active carbon powder, dispersant, nano silver antimicrobials and deionized water with 1000: 30～
1500: 1～20: 0～50: 1000-2000 weight carries out ball milling than mixing, and first slurry is obtained；
B, flocculant and stabilizer are added in above-mentioned first slurry, continuing ball milling makes flocculant and stabilizer uniformly divide
Dissipate, obtain stable Part I flocculated slurry；
C, by above-mentioned Part I flocculated slurry ripening, then drain casting molding in mould, the demoulding simultaneously puts into baking oven
One end closing, the composite ceramicses green compact of the hollow cylinder shape of another end opening are obtained after drying；
D, kieselguhr, dispersant and deionized water are carried out ball with 1000: 1～20: 1000～2000 weight than mixing
Mill, is obtained the second slurry；
E, flocculant and stabilizer are added in above-mentioned second slurry, continuing ball milling makes flocculant and stabilizer uniformly divide
Dissipate, obtain stable Part II flocculated slurry；
F, by Part II flocculated slurry ripening, by the Part II flocculated slurry dip coating after ripening above-mentioned compound
The inner and outer surfaces of ceramic green, obtain final product described coating composite ceramicses base substrate after being dried；
(7) by the above-mentioned green compact that are dried under noble gases or nitrogen are protected, in 450～950 DEG C of heat preservation sintering 1～30h, so
After cool to room temperature with the furnace, obtain the composite ceramic filter core of described loaded optic catalyst coating.
The speed of the stirring in described step (1) is 500～3000rpm, and mixing time is 5～300min.
The medium used by remove impurity of described step (2) is ethanol, deionized water or ethanol deionized water solution.
The acid of described step (4) is at least one in hydrochloric acid, nitric acid and sulphuric acid.
Described thickening agent is polyvinyl alcohol, Radix Acaciae senegalis or sodium carboxymethyl cellulose.
Described noble gases are argon, helium or radon gas.
The above, only presently preferred embodiments of the present invention, therefore the scope of present invention enforcement can not be limited according to this, that is,
The equivalence changes made according to the scope of the claims of the present invention and description and modification, all should still belong in the range of the present invention covers.
Claims (6)
1. a kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating it is characterised in that：Comprise the steps：
(1) butyl titanate that purity is more than 98% is dissolved in ethanol, is configured to the butyl titanate solution of 0.01～1mol/L, will
Concentration is that 90～100% ethanol water adds to butyl titanate solution, is thoroughly mixed reaction, the metatitanic acid being used
The weight of butyl acetate solution and ethanol solution is than for 1～100: 100；
(2) material filtering of step (1) gained is obtained filter cake, and carry out remove impurity；
(3) material of step (2) gained is configured to the solution that concentration is 0.01～1mol/L again；
(4) acid is added to carry out acidolysis in the solution of step (3) gained, the addition of acid is the 0.01～2% of solution；
(5) add thickening agent in the material of step (4) gained, stable nano titanic oxide sol is obtained；
(6) by uniform for above-mentioned nano titanic oxide sol dip loading coating composite ceramicses base substrate internal face, and in 60
～100 DEG C of drying 3～48h, must be dried green compact, and this coating composite ceramicses base substrate is closed for one end, the open tubular column of another end opening
Body, its preparation method comprises the steps：
A, by kieselguhr, nano active carbon powder, dispersant, nano silver antimicrobials and deionized water with 1000: 30～1500: 1
～20: 0～50: 1000-2000 weight carries out ball milling than mixing, and first slurry is obtained；
B, flocculant and stabilizer are added in above-mentioned first slurry, continuing ball milling makes flocculant and stabilizer dispersed,
Obtain stable Part I flocculated slurry；
C, by above-mentioned Part I flocculated slurry ripening, then drain casting molding in mould, the demoulding simultaneously puts into oven drying
Obtain one end closing, the composite ceramicses green compact of the hollow cylinder shape of another end opening afterwards；
D, kieselguhr, dispersant and deionized water are carried out ball milling with 1000: 1～20: 1000～2000 weight than mixing, system
Obtain the second slurry；
E, flocculant and stabilizer are added in above-mentioned second slurry, continuing ball milling makes flocculant and stabilizer dispersed,
Obtain stable Part II flocculated slurry；
F, by Part II flocculated slurry ripening, by the Part II flocculated slurry dip coating after ripening in above-mentioned composite ceramicses
The inner and outer surfaces of green compact, obtain final product described coating composite ceramicses base substrate after being dried；
(7) by the above-mentioned green compact that are dried under noble gases or nitrogen are protected, in 450～950 DEG C of heat preservation sintering 1～30h, Ran Housui
Stove is cooled to room temperature, obtains the composite ceramic filter core of described loaded optic catalyst coating.
2. preparation method as claimed in claim 1 it is characterised in that：The speed of the stirring in described step (1) be 500～
3000rpm, mixing time is 5～300min.
3. preparation method as claimed in claim 1 it is characterised in that：The medium used by remove impurity of described step (2) be ethanol,
Deionized water or ethanol deionized water solution.
4. preparation method as claimed in claim 1 it is characterised in that：The acid of described step (4) is in hydrochloric acid, nitric acid and sulphuric acid
At least one.
5. preparation method as claimed in claim 1 it is characterised in that：Described thickening agent be polyvinyl alcohol, Radix Acaciae senegalis or
Sodium carboxymethyl cellulose.
6. preparation method as claimed in claim 1 it is characterised in that：Described noble gases are argon, helium or radon gas.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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