CN108033719A - A kind of efficient multi-purpose photocatalysis concrete and preparation method thereof - Google Patents
A kind of efficient multi-purpose photocatalysis concrete and preparation method thereof Download PDFInfo
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- CN108033719A CN108033719A CN201711185415.0A CN201711185415A CN108033719A CN 108033719 A CN108033719 A CN 108033719A CN 201711185415 A CN201711185415 A CN 201711185415A CN 108033719 A CN108033719 A CN 108033719A
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 123
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 117
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 88
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000001354 calcination Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 11
- 229910017604 nitric acid Inorganic materials 0.000 claims description 11
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000010457 zeolite Substances 0.000 claims description 9
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 238000003980 solgel method Methods 0.000 claims description 7
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 206010000060 Abdominal distension Diseases 0.000 claims description 3
- 208000024330 bloating Diseases 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims description 3
- 235000019362 perlite Nutrition 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000010455 vermiculite Substances 0.000 claims description 3
- 229910052902 vermiculite Inorganic materials 0.000 claims description 3
- 235000019354 vermiculite Nutrition 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 abstract description 19
- 230000003197 catalytic effect Effects 0.000 abstract description 15
- 239000002245 particle Substances 0.000 abstract description 9
- 230000002708 enhancing effect Effects 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 20
- 238000006555 catalytic reaction Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- 239000002086 nanomaterial Substances 0.000 description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 9
- 238000006731 degradation reaction Methods 0.000 description 9
- 239000000725 suspension Substances 0.000 description 7
- 210000000988 bone and bone Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000004035 construction material Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 230000000505 pernicious effect Effects 0.000 description 3
- 238000001782 photodegradation Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- ZWYDDDAMNQQZHD-UHFFFAOYSA-L titanium(ii) chloride Chemical compound [Cl-].[Cl-].[Ti+2] ZWYDDDAMNQQZHD-UHFFFAOYSA-L 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
- C04B2111/00827—Photocatalysts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a kind of efficient multi-purpose photocatalysis concrete and preparation method thereof；The photocatalysis concrete mainly includes the photocatalysis aggregate of 5wt% 10wt%, and the present invention prepares photocatalysis concrete by adulterating photocatalysis aggregate in concrete, and the alkalescence for effectively reducing cement in concrete destroys TiO2Catalytic efficiency, effectively improve the catalytic efficiency and service life of photocatalysis building building cement.The present invention prepares TiO using sol-gal process2The hydrosol, impregnates aggregate using negative pressure saturation, photocatalysis aggregate is prepared after calcining；The preparation method of the present invention avoids TiO2Nanoparticle agglomerates, make TiO2Particle is uniformly dispersed in aggregate, improves the specific surface area of photocatalysis, so as to effectively increase photocatalysis efficiency；Photocatalysis aggregate is prepared after present invention calcining, so that TiO2Chemical bonds are produced in aggregate surface, enhancing combines power, improves durability.
Description
Technical field
The invention belongs to the technical field of photo catalytic cement sill, and in particular to a kind of efficient multi-purpose photocatalysis coagulation
Soil and preparation method thereof.
Background technology
With TiO2There is superpower catalysis oxidation for the catalysis material of representative, in depollution of environment side since birth
Face is widely applied.Construction material using cement concrete as representative, dosage is big, use scope is wide, is catalysis material
Ideal carrier in depollution of environment field.In recent years, photocatalysis construction material from scratch, is gradually sent out in depollution of environment field
Important function is waved, the technology of preparing of photocatalysis construction material is also among constantly improve, but current photocatalysis Building wood
Material still has following problem, limits its application：1. the high alkalinity environment of cement-based material is to TiO2Catalytic activity
Tool has a significant impact；2. cement-based material itself is more closely knit, specific surface area is small, and leading role is accounted for for a suction-operated
Reaction, without forward direction facilitation；3. however, using directly mixing nano-TiO into cement2The carrying method of powder, can lead
Hydrolysis product of cement Encapsulation nanoparticle is caused, and nano particle is easy to reunite in the environment of having water, is not easy to disperse, reduces
The specific surface area of photocatalysis, reduces photocatalysis efficiency；4. the nano-TiO secondly, not wrapped up by hydrolysis product of cement2With
The combination of cement-based material is more based on model moral supernatural power, poor with reference to power, belongs to weaker connection, after being used for multiple times, it may appear that
TiO2The phenomenon of peeling, reduces its durability.
The content of the invention
It is an object of the invention to provide a kind of efficient multi-purpose photocatalysis concrete, the main light for including 5wt%-10wt%
Catalyzed aggregates, the TiO loaded in the photocatalysis aggregate2With preferable photocatalysis；The present invention is by concrete
Photocatalysis concrete prepared by photocatalysis aggregate is adulterated, the alkalescence for effectively reducing cement in concrete destroys TiO2Catalysis effect
Rate；The present invention can effectively improve the catalytic efficiency and service life of photocatalysis building building cement；
Another object of the present invention is to provide a kind of preparation method of efficient multi-purpose photocatalysis concrete, the present invention is using molten
Glue-gel method prepares TiO2The hydrosol, impregnates aggregate using negative pressure-saturation, photocatalysis aggregate is prepared after calcining；This hair
Bright preparation method is simple, it is possible to prevente effectively from TiO2Nanoparticle agglomerates, make TiO2Particle is uniformly dispersed in aggregate, improves
The specific surface area of photocatalysis, so as to effectively increase photocatalysis efficiency；The present invention loads TiO in aggregate at the same time2Afterwards
Using the method for calcining, TiO is allowed2Chemical bonds are produced in aggregate surface, enhancing combines power, improves durability.
The present invention is achieved through the following technical solutions：A kind of efficient multi-purpose photocatalysis concrete, mainly includes
The photocatalysis aggregate of 5wt%-10wt%, is loaded with photochemical catalyst TiO in the photocatalysis aggregate2.The present invention is found by experiment
The photocatalysis efficiency of the concrete of preparation increases and increases with photocatalysis aggregate, but when photocatalysis aggregate quality fraction surpasses
When 10%, photocatalysis efficiency amplification is obviously reduced, and main cause is the increase with aggregate quality, total catalyst activity point
The amount of position exposure is increasing, but with further increase, generates overlapped between catalyst, and the light of the concrete is urged
Rate is not further added by.
A kind of preparation method of efficient multi-purpose photocatalysis concrete, mainly includes the following steps that：
Step A, TiO is prepared using sol-gel process2The hydrosol, then adds aggregate mixing, load is prepared after calcining
TiO2The photocatalysis aggregate of photochemical catalyst；
Step B, photocatalysis aggregate and the cement, the sandstone that are prepared in step A are mixed, photocatalysis concrete is prepared.
Cement, aggregate, the ratio formula of sandstone are the prior art in the concrete, and are not the improvements of the present invention,
So it will not be repeated.
In order to preferably realize the present invention, further, the step A is mainly included the following steps that：
Step A1, positive butyl titanate is added dropwise in deionized water, is stirred when being added dropwise, and during which adds a small amount of nitric acid, drop
24h is stirred under 40-60 DEG C of bath temperature nattier blue TiO is prepared after adding2Colloidal sol；
Step A2, the TiO that step A1 is prepared is added to by aggregate2In colloidal sol, 45min is stirred, then ultrasonic disperse 1h, so
After rest in vacuum reaction kettle, keep 3-5h, using negative pressure-saturation process by aggregate infiltrate in TiO2In colloidal sol；
Step A3, is placed on drying in the baking oven at 100 DEG C by the aggregate handled in step A2, is then placed within Muffle furnace
In 1-2h is calcined under the conditions of 200-400 DEG C, photocatalysis aggregate is prepared after cooling.
In order to preferably realize the present invention, further, butyl titanate in the step A1：Deionized water：The matter of nitric acid
Amount is than being 1：8：0.08.
In order to preferably realize the present invention, further, the pressure of vacuum reaction kettle is 0.07- in the step A2
0.15MPa.The negative pressure-saturation infusion method, principle are that the negative pressure atmosphere of 0.07-0.15 megapascal is formed by vacuum pump, make bone
Material and TiO2Colloidal sol is in negative pressure atmosphere, TiO2Colloidal sol can be pressed into the nanometer of aggregate to micrometer grade hole under the action of negative pressure
In gap.The negative pressure-saturation infusion method can allow in aggregate nanometer to micron-sized hole fully by TiO2Colloidal sol infiltrates,
After calcining, TiO2Combined with aggregate pore surface, such processing method improves TiO2Load factor, and increase
TiO2Specific surface area, add light-catalyzed reaction active site position.
In order to preferably realize the present invention, further, aggregate and TiO in step A32The mass ratio of colloidal sol is 1：0.8~
1。
In order to preferably realize the present invention, further, the aggregate is natural zeolite, expanded vermiculite, bloating shale, pottery
Any one in grain, expanded perlite, expanded slag.
Concrete is a kind of indispensable construction material, and the Building technology of concrete has obtained the hair of air in recent years
Exhibition, some advanced concrete materials and technological development expedite the emergence of out a collection of advanced Building technology.The concrete in novel building
Serve not only as structural material and also serve as decorative material use, the diagnostic cast being combined by nano-photocatalyst with cement concrete
Type and product also begin to come into being, and exploitation photocatalytic self-cleaning concrete has important meaning to the function of enriching concrete
Justice, while the function of the pollutant and building surface microorganism in concrete degraded air is also gived, it is new concrete
One of key technology of building.
The progress of concrete construction technology causes the concrete as ornament materials to be widely applied in some modern architectures,
Exploitation self-cleaning concrete can improve concrete decorative effect and impart the function of its depollution of environment.The energy of semiconductor catalyst
Band is discontinuous, there are a forbidden band between the high energy valence band of the low energy valence band of electronics and sky is filled up, uses photocatalyst
Semiconductor be mostly metal oxide and sulfide, generally with larger energy gap, wherein TiO2With photocatalysis
The advantages that active high, stability is good, cheap, harmless to the human body, simultaneously because quantum size effect makes TiO2Nanometer material
Expect that forbidden band is broadening, the increase of redox potential energy, the increase of light-catalyzed reaction driving force, it is brilliant to be provided with high specific area, high density surface
Lattice defect and high surface area, improve the photocatalytic activity of itself, therefore nano level TiO2Material is to prepare light at present to urge
Change the optimal catalysis material of concrete.
TiO2Nano material is a kind of n-type semiconductor, crystal form during it has 3：Detitanium-ore-type, rutile-type and brockite
Type.Wherein Detitanium-ore-type TiO2Photocatalytic activity it is best, its energy gap Eg=3.2eV, λ=387nm, is in ultraviolet region
Domain, its photocatalysis oxidation reaction are required to ultraviolet source and are excited.The TiO2The photocatalytic mechanism of nano material, compares into
Ripe is the electron-hole action principle based on band theory, which is the prior art, and so it will not be repeated.
Photocatalytic self-cleaning concrete is to utilize corresponding adding technique, gathers materials to concrete surface or inside and introduces nanometer
Level TiO2, make concrete that there is photocatalytic self-cleaning performance, be a kind of new function section bar material.The present invention is carried using photocatalysis
Body method, by the area load TiO of the aggregates in concrete2Nano material, is then placed on concrete by photocatalysis aggregate
Block surfaces, make coated TiO2Nano material part is exposed, and can be used for catalytic degradation using oxynitrides as representative
Vehicle exhaust is either using volatile organic matter as indoor harmful gas of representative etc..
Butyl titanate in the present invention：Deionized water：Nitric acid is according to mass ratio 1：8：TiO is prepared in 0.08 reaction2Colloidal sol,
Wherein TiO2Mass fraction is 2.58wt%.The present invention is by varying TiO2The mass ratio of colloidal sol and aggregate controls TiO in aggregate2
Load capacity, by experiment, TiO can be obtained2The mass ratio of colloidal sol and aggregate is 0.8 ~ 1:When 1, TiO in aggregate2Load factor be
85%, catalytic degradation effect is best.
In order to eliminate the influence of alkaline environment, present invention selection aggregate is as TiO2Load matrix, aggregate is mostly natural
Mineral, self property are stablized, and cement concrete major part volume are accounted for, by hydrated cementitious environment and TiO2Separate well.For
The absorption property of enhancing construction material, promotes light-catalyzed reaction, selects that specific surface area is larger, and the mineral that duct is enriched are as bone
Material, common aggregate have the porosity bone such as natural zeolite, expanded vermiculite, bloating shale, haydite, expanded perlite, expanded slag
Material.
Traditional titanium dichloride load method is to be directly incorporated into TiO2Particle, or by powder TiO2Suspension is made, into
Row immersion, spraying, due to nano level TiO2Specific grain surface is larger, meets water and easily reunites, it is difficult to is scattered.The present invention uses metatitanic acid
Butyl ester prepares TiO as titanium source by sol-gel process2The hydrosol, using the method for negative pressure-saturation infiltration in aggregate
Surface carries out TiO2Load, using the method for calcining after load, allows TiO2Chemical bonds, enhancing knot are produced between aggregate
With joint efforts, durability is improved.
Beneficial effects of the present invention：
（1）Mainly include the photocatalysis aggregate of 5wt%-10wt% in the concrete, being loaded with light in the photocatalysis aggregate urges
Agent TiO2, the photocatalysis efficiency of the concrete increases with the increase of photocatalysis aggregate；
（2）The present invention have selected aggregate as TiO2Direct carrier, by hydrolysis product of cement and TiO2Separate, substantially reduce
The high alkalinity environment of cement is to TiO2Catalytic performance influence；
（3）Present invention selection porosity aggregate is as carrier, and aggregate has higher specific surface area, wherein containing a large amount of nanometers extremely
Micron-sized duct, these ducts are not only TiO2Load place is provided, is conducive to TiO2Fully divide in nanometer to micron order
Dissipate, greatly increase TiO2Active site bit quantity, and make aggregate that there is superpower absorption property, positively light can be promoted to urge
Change reaction, greatly improve photocatalysis performance；
（4）The present invention prepares TiO using sol-gel process2, and by negative pressure-saturation infusion method by nano-TiO2It is dispersed
To among the duct of aggregate, nano-TiO is avoided2Reunion, add TiO2Specific surface area, increase TiO2Active site position
Quantity, improves the photocatalysis efficiency of concrete；
（5）The present invention makes TiO using the method for calcining2Stronger chemical bond is generated between aggregate, is effectively reduced
TiO2Peeling, improve durability；
（6）The preparation method of the present invention is simple, and cost is low easily to realize there is preferable market application foreground.
Brief description of the drawings
Fig. 1 is undisguised material concrete model structure diagram；
Fig. 2 is the microstructure schematic diagram of photocatalysis aggregate；
Fig. 3 is degradation efficiency schematic diagram of the photocatalysis concrete to acetone.
Embodiment
Embodiment 1：
A kind of efficient multi-purpose photocatalysis concrete, mainly includes 1wt% photocatalysis aggregates, is loaded with the photocatalysis aggregate
Photochemical catalyst TiO2。
A kind of preparation method of efficient multi-purpose photocatalysis concrete mainly includes the following steps that：
Step A1：Natural zeolite of the particle diameter for 1-2cm is selected, cleans silt, drying, it is spare to weigh 500g；Weigh 10g metatitanic acid fourths
Ester, 80g deionized waters, 0.8g nitric acid；Nitric acid is all added in deionized water, then butyl titanate is added dropwise, is added dropwise
Speed is 2-3 drops/sec, is stirred when being added dropwise, milky suspension is obtained after dripping；Milky suspension is placed in 50
DEG C stirred in water bath reaction 24 it is small when, finally obtain nattier blue TiO2Colloidal sol；
Step A2：500g natural zeolites are poured into TiO2Stirred in colloidal sol 45 minutes, then when ultrasonic disperse 1 is small, standing is put
Put in vacuum reaction kettle, the pressure of the vacuum reaction kettle is 0.07MPa, when placement 4 is small；
Step A3：The aggregate infiltrated is taken out from vacuum reaction kettle, placement is dried at 100 DEG C, then placed in an oven
When calcining 2 is small at 200 DEG C in Muffle furnace, photocatalysis aggregate is obtained after cooling；
Step B：Photocatalysis aggregate is uniformly mixed with cement, sandstone concrete is prepared.
The present invention uses Patent No. CN206192955U, patent name as the new gas phase light under a kind of multi parameters control
The method proposed in quantitative testing device is catalyzed, the test present invention is directed to the photodegradation rate of acetone.
As shown in Figure 1, the present invention is to use photocatalysis support methods, by the area load TiO of the aggregates in concrete2
Nano material, the photocatalysis aggregate are coated on concrete segment surface, make coated TiO2Nano material part is exposed, can
For pernicious gases such as the tail gas of catalytic degradation motor vehicle emission or building interior formaldehyde gases.
As shown in Fig. 2, the TiO2Nano particle is evenly distributed in aggregate, the TiO2Formed between nano particle
Accumulate hole；As shown in figure 3, with the extension of catalysis time, acetone is gradually degraded, and catalytic degradation no longer becomes afterwards to a certain amount of
Change；The photocatalysis aggregate effectively enhances the photocatalysis efficiency of concrete.
The photocatalysis concrete that the present invention is prepared by adulterating photocatalysis aggregate in concrete, effectively reduces concrete
The alkalescence of middle cement destroys TiO2Catalytic efficiency；The present invention can effectively improve catalytic efficiency and the use of photocatalysis building building cement
Service life；The present invention prepares TiO using sol-gel process2The hydrosol, impregnates aggregate using negative pressure-saturation, is prepared into after calcining
To photocatalysis aggregate；The preparation method of the present invention is simple, it is possible to prevente effectively from TiO2Nanoparticle agglomerates, make TiO2Particle is in bone
It is uniformly dispersed in material, improves the specific surface area of photocatalysis, so as to effectively increases photocatalysis efficiency；The present invention exists at the same time
Aggregate loads TiO2Afterwards using the method for calcining, TiO is allowed2Chemical bonds are produced in aggregate surface, enhancing combines power, improves
Durability.
Embodiment 2：
A kind of efficient multi-purpose photocatalysis concrete, mainly includes 5wt% photocatalysis aggregates, is loaded with the photocatalysis aggregate
Photochemical catalyst TiO2。
A kind of preparation method of efficient multi-purpose photocatalysis concrete mainly includes the following steps that：
Step A1：Natural zeolite of the particle diameter for 1-2cm is selected, cleans silt, drying, it is spare to weigh 500g；Weigh 10g metatitanic acid fourths
Ester, 80g deionized waters, 0.8g nitric acid；Nitric acid is all added in deionized water, then butyl titanate is added dropwise, is added dropwise
Speed is 2-3 drops/sec, is stirred when being added dropwise, milky suspension is obtained after dripping；Milky suspension is placed in 50
DEG C stirred in water bath reaction 24 it is small when, finally obtain nattier blue TiO2Colloidal sol；
Step A2：500g natural zeolites are poured into TiO2Stirred in colloidal sol 45 minutes, then when ultrasonic disperse 1 is small, standing is put
Put in vacuum reaction kettle, the pressure of the vacuum reaction kettle is 0.07MPa, when placement 4 is small；
Step A3：The aggregate infiltrated is taken out from vacuum reaction kettle, placement is dried at 100 DEG C, then placed in an oven
When calcining 2 is small at 200 DEG C in Muffle furnace, photocatalysis aggregate is obtained after cooling；
Step B：Photocatalysis aggregate is uniformly mixed with cement, sandstone concrete is prepared.
The present invention uses Patent No. CN206192955U, patent name as the new gas phase light under a kind of multi parameters control
The method proposed in quantitative testing device is catalyzed, the test present invention is directed to the photodegradation rate of acetone.
As shown in Figure 1, the present invention is to use photocatalysis support methods, by the area load TiO of the aggregates in concrete2
Nano material, the photocatalysis aggregate are coated on concrete segment surface, make coated TiO2Nano material part is exposed, can
For pernicious gases such as the tail gas of catalytic degradation motor vehicle emission or building interior formaldehyde gases.
As shown in Fig. 2, the TiO2Nano particle is evenly distributed in aggregate, the TiO2Formed between nano particle
Accumulate hole；As shown in figure 3, with the extension of catalysis time, acetone is gradually degraded, and catalytic degradation no longer becomes afterwards to a certain amount of
Change；The photocatalysis aggregate effectively enhances the photocatalysis efficiency of concrete；It is manufactured in the present embodiment to contain compared to embodiment 1
The opposite area load TiO for raising, aggregate being primarily due to this of efficiency of the concrete catalysis acetone of 5wt% photocatalysis aggregates2
The quality increase of nano particle, the catalytic efficiency of the concrete is with TiO2The increase of nano particle and increase.
The photocatalysis concrete that the present invention is prepared by adulterating photocatalysis aggregate in concrete, effectively reduces concrete
The alkalescence of middle cement destroys TiO2Catalytic efficiency；The present invention can effectively improve catalytic efficiency and the use of photocatalysis building building cement
Service life；The present invention prepares TiO using sol-gel process2The hydrosol, impregnates aggregate using negative pressure-saturation, is prepared into after calcining
To photocatalysis aggregate；The preparation method of the present invention is simple, it is possible to prevente effectively from TiO2Nanoparticle agglomerates, make TiO2Particle is in bone
It is uniformly dispersed in material, improves the specific surface area of photocatalysis, so as to effectively increases photocatalysis efficiency；The present invention exists at the same time
Aggregate loads TiO2Afterwards using the method for calcining, TiO is allowed2Chemical bonds are produced in aggregate surface, enhancing combines power, improves
Durability.
Embodiment 3：
A kind of efficient multi-purpose photocatalysis concrete, mainly includes 10wt% photocatalysis aggregates, is loaded with the photocatalysis aggregate
Photochemical catalyst TiO2。
A kind of preparation method of efficient multi-purpose photocatalysis concrete mainly includes the following steps that：
Step A1：Natural zeolite of the particle diameter for 1-2cm is selected, cleans silt, drying, it is spare to weigh 500g；Weigh 10g metatitanic acid fourths
Ester, 80g deionized waters, 0.8g nitric acid；Nitric acid is all added in deionized water, then butyl titanate is added dropwise, is added dropwise
Speed is 2-3 drops/sec, is stirred when being added dropwise, milky suspension is obtained after dripping；Milky suspension is placed in 50
DEG C stirred in water bath reaction 24 it is small when, finally obtain nattier blue TiO2Colloidal sol；
Step A2：500g natural zeolites are poured into TiO2Stirred in colloidal sol 45 minutes, then when ultrasonic disperse 1 is small, standing is put
Put in vacuum reaction kettle, the pressure of the vacuum reaction kettle is 0.07MPa, when placement 4 is small；
Step A3：The aggregate infiltrated is taken out from vacuum reaction kettle, placement is dried at 100 DEG C, then placed in an oven
When calcining 2 is small at 200 DEG C in Muffle furnace, photocatalysis aggregate is obtained after cooling；
Step B：Photocatalysis aggregate is uniformly mixed with cement, sandstone concrete is prepared.
The present invention uses Patent No. CN206192955U, patent name as the new gas phase light under a kind of multi parameters control
The method proposed in quantitative testing device is catalyzed, the test present invention is directed to the photodegradation rate of acetone.
As shown in Figure 1, the present invention is to use photocatalysis support methods, by the area load TiO of the aggregates in concrete2
Nano material, the photocatalysis aggregate are coated on concrete segment surface, make coated TiO2Nano material part is exposed, can
For pernicious gases such as the tail gas of catalytic degradation motor vehicle emission or building interior formaldehyde gases.
As shown in Fig. 2, the TiO2Nano particle is evenly distributed in aggregate, the TiO2Formed between nano particle
Accumulate hole；As shown in figure 3, with the extension of catalysis time, acetone is gradually degraded, and catalytic degradation no longer becomes afterwards to a certain amount of
Change；The photocatalysis aggregate effectively enhances the photocatalysis efficiency of concrete；Compared to embodiment 1 and embodiment 2, the present embodiment system
The opposite surface for raising, aggregate being primarily due to this of efficiency of the concrete catalysis acetone of the standby aggregate of photocatalysis containing 10wt%
Load TiO2The quality increase of nano particle, the catalytic efficiency of the concrete is with TiO2The increase of nano particle and increase；So
And the efficiency ramp-up rate of the concrete catalysis acetone of the aggregate of photocatalysis containing 10wt% reduces, this is primarily due to in aggregate
TiO2The increase of nano particle, forms TiO in aggregate2Nano particle is accumulated, and effectively reduces the elevated speed of photocatalysis.
The photocatalysis concrete that the present invention is prepared by adulterating photocatalysis aggregate in concrete, effectively reduces concrete
The alkalescence of middle cement destroys TiO2Catalytic efficiency；The present invention can effectively improve catalytic efficiency and the use of photocatalysis building building cement
Service life；The present invention prepares TiO using sol-gel process2The hydrosol, impregnates aggregate using negative pressure-saturation, is prepared into after calcining
To photocatalysis aggregate；The preparation method of the present invention is simple, it is possible to prevente effectively from TiO2Nanoparticle agglomerates, make TiO2Particle is in bone
It is uniformly dispersed in material, improves the specific surface area of photocatalysis, so as to effectively increases photocatalysis efficiency；The present invention exists at the same time
Aggregate loads TiO2Afterwards using the method for calcining, TiO is allowed2Chemical bonds are produced in aggregate surface, enhancing combines power, improves
Durability.
The above, is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (7)
1. a kind of efficient multi-purpose photocatalysis concrete, it is characterised in that the main photocatalysis aggregate for including 5wt%-10wt%, institute
State and photochemical catalyst TiO is loaded with photocatalysis aggregate2。
2. a kind of preparation method of efficient multi-purpose photocatalysis concrete, it is characterised in that mainly include the following steps that：
Step A, TiO is prepared using sol-gel process2The hydrosol, then adds aggregate mixing, load is prepared after calcining
TiO2The photocatalysis aggregate of photochemical catalyst；
Step B, photocatalysis aggregate and the cement, the sandstone that are prepared in step A are mixed, photocatalysis concrete is prepared.
3. the preparation method of a kind of efficient multi-purpose photocatalysis concrete according to claim 2, it is characterised in that described
Step A is mainly included the following steps that：
Step A1, positive butyl titanate is added dropwise in deionized water, is stirred when being added dropwise, and during which adds a small amount of nitric acid, drop
24h is stirred under 40-60 DEG C of bath temperature nattier blue TiO is prepared after adding2Colloidal sol；
Step A2, the TiO that step A1 is prepared is added to by aggregate2In colloidal sol, 45min is stirred, then ultrasonic disperse 1h, so
After rest in vacuum reaction kettle, keep 3-5h, using negative pressure-saturation process by aggregate infiltrate in TiO2In colloidal sol；
Step A3, is placed on drying in the baking oven at 100 DEG C by the aggregate handled in step A2, is then placed within Muffle furnace
In 1-2h is calcined under the conditions of 200-400 DEG C, photocatalysis aggregate is prepared after cooling.
4. the preparation method of a kind of efficient multi-purpose photocatalysis concrete according to claim 3, it is characterised in that described
Butyl titanate in step A1：Deionized water：The mass ratio of nitric acid is 1：8：0.08.
5. the preparation method of a kind of efficient multi-purpose photocatalysis concrete according to claim 3, it is characterised in that described
The pressure of vacuum reaction kettle is 0.07-0.15MPa in step A2.
6. the preparation method of a kind of efficient multi-purpose photocatalysis concrete according to claim 3, it is characterised in that described
Aggregate and TiO in step A32The mass ratio of colloidal sol is 1：0.8~1.
7. according to a kind of preparation method of efficient multi-purpose photocatalysis concrete of claim 3-6 any one of them, its feature
It is, the aggregate is natural zeolite, any one in expanded vermiculite, bloating shale, haydite, expanded perlite, expanded slag
Kind.
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