CN110436850A - A kind of visible light-responded modified photocatalytic New Style Concrete Materials and preparation method thereof - Google Patents
A kind of visible light-responded modified photocatalytic New Style Concrete Materials and preparation method thereof Download PDFInfo
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- CN110436850A CN110436850A CN201910756644.6A CN201910756644A CN110436850A CN 110436850 A CN110436850 A CN 110436850A CN 201910756644 A CN201910756644 A CN 201910756644A CN 110436850 A CN110436850 A CN 110436850A
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- titanium dioxide
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- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- 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
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- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to a kind of visible light-responded modified photocatalytic New Style Concrete Materials and preparation method thereof, belong to building concrete field of material technology.The visible light-responded modified photocatalytic New Style Concrete Materials have spectral response range wider, the characteristics of atmosphere pollution of degrading and indoor formaldehyde, photoelectric conversion and photocatalysis by nano-titanium dioxide, toxic and harmful gas that can effectively in purifying indoor formaldehyde and atmosphere, by adding narrowband based semiconductor cadmium sulfide, enhance the absorption coefficient of the sunlight of material, improve the photocatalysis performance and photoelectric conversion efficiency of titanium dioxide, the spectral response range for solving the problems, such as that existing photocatalysis concrete material has is relatively narrow, meet the production needs of building field.
Description
Technical field
The present invention relates to a kind of visible light-responded modified photocatalytic New Style Concrete Materials and preparation method thereof, belong to building
Concrete material technical field.
Background technique
In recent years, the urban air pollution situation in China is extremely serious, but since noxious gas emission source is numerous, discharge
Gas constituent is complicated, gas emissions are huge, causes difficulty of governance larger, in addition, urban architecture itself is also pollution sources
One of, multiple building materials generally have the problem of formaldehyde, seriously affect the physical and mental health of people.Although concrete material
Has the usage history of upper a century in building, but with the development of society, traditional concrete has been increasingly difficult to full
Demand of the sufficient people to resource, environment, construction and performance.Have benefited from a large amount of experiment and research, the concrete of new material obtains
Rapid development is arrived, among these, photocatalysis concrete has the characteristics that energy conservation and environmental protection, also with the work of degradation of contaminant
With being the important research direction of environment protection field, have broad prospects in terms of control atmosphere pollution object and indoor formaldehyde.
Currently used photocatalysis concrete generally adds titanium dioxide as photochemical catalyst, to realize air treating
Function.Nano-titanium dioxide is a kind of novel inorganic functional material with good photoelectrochemical property, it have degradation it is fast,
The feature that price is low, nonhazardous and reaction condition are mild, after adding titanium dioxide optical catalyst in concrete, titanium dioxide is just
It can be the contamination-frees such as carbon dioxide and water by pollutant photocatalytic degradation using sunlight.But the spectral response of titanium dioxide
Range is relatively narrow, is only limited to work in ultraviolet light range, can not absorb the solar energy of visible-range, therefore solar energy utilization ratio is very
It is low, cause photocatalysis effect poor, it is therefore desirable to which a kind of new photocatalysis concrete material solves above-mentioned deficiency.
Summary of the invention
It is an object of the invention to: a kind of wider spectral response range, degradation atmosphere pollution and indoor formaldehyde are provided, with
Solve the problems, such as that the relatively narrow visible light-responded modified photocatalytic of the spectral response range that existing photocatalysis concrete material has is new
Type concrete material and preparation method thereof.
The technical scheme is that
A kind of visible light-responded modified photocatalytic New Style Concrete Materials, it is characterised in that: it is by following mass percent
Material synthesis is made:
8% water of cement, 8.1% sand, 27.4% coarse aggregate 45.3%
0.3% dispersing agent of water-reducing agent, 0.1% cadmium sulfide 0.4%
3.6% silicon ash of titanium dioxide, 1.2% flyash 5.6%；
The cement is 42.5 grades of ordinary portland cements,
The sand is sand in IIth area of the clay content less than 2%,
The light-permeable cullet that the coarse aggregate is partial size 8-25 millimeters,
The water-reducing agent is tributyl phosphate,
The dispersing agent is carboxyethyl cellulose,
The silicon ash is wollastonite in powder,
The flyash is II grade of C class flyash.
The preparation method of above-mentioned visible light-responded modified photocatalytic New Style Concrete Materials, comprising the following steps:
1) titanium dioxide and cadmium sulfide, are weighed for the ratio of 9:1 in mass ratio, then puts weighed titanium dioxide and cadmium sulfide
It sets in the Stainless Steel Vacuum ball grinder of planetary ball mill；
2) Ball-milling Time of above-mentioned planetary ball mill, is set as 4 hours, revolving speed is set as 600r/min, after the completion of ball milling
Obtain nano-titanium dioxide and Nano cadmium sulphide；
3), above-mentioned nano-titanium dioxide and Nano cadmium sulphide are placed in high temperature furnace, temperature is set as 150 DEG C, temperature setting
It is 3 hours, dry nano-titanium dioxide and dry Nano cadmium sulphide is obtained after heating；
4), dispersing agent is vibrated 5 minutes using ultrasonic wave, then by the nano-titanium dioxide of above-mentioned drying, the nano-sulfur of drying
Cadmium, water and dispersing agent are put into together in the agitator of electric blender, and mixing time is set as 8 minutes, in whipping process not
It is disconnected that water-reducing agent is added；
5) sand, coarse aggregate, silicon ash and flyash, are weighed, another electric blender is added, mixing time is set as 3 minutes, stirs
After the completion of mixing, cement is added into the mixture of sand, coarse aggregate, silicon ash and flyash, continues stirring 2 minutes；
6) above-mentioned steps 5 are mixed with the material for stirring completion in step 4, put stirring in electric blender into together, when stirring
Between be set as 4 minutes, visible light-responded modified photocatalytic New Style Concrete Materials can be obtained.
The present invention has the advantages that
The visible light-responded modified photocatalytic New Style Concrete Materials are wider with spectral response range, atmosphere pollution of degrading
And the characteristics of indoor formaldehyde, photoelectric conversion and photocatalysis by nano-titanium dioxide, can effectively purifying indoor formaldehyde and
Toxic and harmful gas in atmosphere enhances the absorption coefficient of the sunlight of material by addition narrowband based semiconductor cadmium sulfide,
The photocatalysis performance and photoelectric conversion efficiency for improving titanium dioxide solve the spectrum that existing photocatalysis concrete material has
The relatively narrow problem of response range meets the production needs of building field.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of closed air experimental cabin of the invention.
Specific embodiment
Titanium dioxide and cadmium sulfide are weighed for the ratio of 9:1 in mass ratio, titanium dioxide has light-catalysed function, its benefit
It by contaminant degradation is the contamination-frees such as carbon dioxide and water with sunlight, cadmium sulfide is a kind of narrowband based semiconductor, to the sun
The absorption coefficient of light is bigger, and the photocatalysis performance and photoelectric conversion efficiency of titanium dioxide can be enhanced.It then will be weighed
Titanium dioxide and cadmium sulfide are placed in the Stainless Steel Vacuum ball grinder of planetary ball mill, and Ball-milling Time is set as 4 hours, are turned
Speed is set as 600r/min, and nano-titanium dioxide and Nano cadmium sulphide, nano-titanium dioxide and nano-sulfur are obtained after the completion of ball milling
Cadmium has bigger specific surface area relative to the titanium dioxide and cadmium sulfide of non-ball milling, can improve the work effect of photocatalysis
Rate.
The nano-titanium dioxide obtained after ball milling and Nano cadmium sulphide are placed in high temperature furnace, temperature is set as 150 DEG C,
Temperature is set as 3 hours, and dry nano-titanium dioxide and dry Nano cadmium sulphide are obtained after heating.Then dispersing agent is taken to wait for
With, dispersing agent is carboxyethyl cellulose, dispersing agent is vibrated 5 minutes using ultrasonic wave, then by dry nano-titanium dioxide,
Dry Nano cadmium sulphide, water and dispersing agent is put into together in the agitator of electric blender, and mixing time is set as 8 minutes,
Water-reducing agent is continuously added in whipping process, water-reducing agent is tributyl phosphate.
Sand, coarse aggregate, silicon ash and flyash are weighed, sand is river sand, and chooses sand in IIth area of the clay content less than 2%, silicon
Ash is wollastonite in powder, and flyash is II grade of C class flyash, and coarse aggregate is that container glass and the plate glass etc. in daily life can
Light transmission cullet, the main chemical compositions of the light-permeable cullet of the type are SiO2, CaO, Na2O and Al2O3Deng wherein SiO2
Content is 70% or so, and the density of light-permeable cullet is 2.5g/cm3, and the density of natural aggregate is 2.6g/cm3, Ji Ketou
The physicochemical property of light cullet and natural aggregate are very close, therefore can replace nature bone with the scrap glass of light-permeable
Material, it is energy saving and environmentally protective to achieve the purpose that, and the density of scrap glass is slightly less than natural aggregate, therefore in a large amount of use
The quality of concrete can be mitigated；The glass dregs for being 8-25 millimeters at partial size by light-permeable cullet ball milling, i.e. completion coarse aggregate
Preparation.
Another electric blender is added in sand, coarse aggregate, silicon ash and flyash, mixing time is set as 3 minutes, stirring
After the completion, cement is added into the mixture of sand, coarse aggregate, silicon ash and flyash, cement is 42.5 grades of ordinary portland cements,
Continue stirring 2 minutes, after the completion of stirring, by cement admixture, completes the titanium dioxide stirred and cadmium sulfide mixing, put into together
Stirring, mixing time are set as 4 minutes, the novel coagulation of the wider modified photocatalytic of spectral response range can be obtained in blender
Soil material.
The working principle of the concrete material are as follows: when illumination is mapped on the concrete material, if the energy of illumination reaches
Or the band-gap energy more than nano-titanium dioxide, titanium dioxide (TiO2) be stimulated after generate light induced electron (e-) and valence band hole
(h+), reaction equation are as follows:
E- in formula (1) is reducing agent, has high activity, the oxygen molecule (O of e- and surface of concrete absorption2) anti-
It answers, generates Superoxide anion free radical (O2), reaction equation are as follows:
·O2 -Cooperate hydrone (H of the e- further with surface of concrete absorption2O series reaction) is generated, hydroxyl is generated
Free radical (OH), reaction equation are as follows:
H+ in formula (1) is oxidant, h+ and the OH-ion and hydrone (H with surface of concrete absorption2O it) generates anti-
It answers, generates hydroxyl radical free radical (OH), reaction equation are as follows:
Hydroxyl radical free radical (OH) and Superoxide anion free radical (O2) have extremely strong oxidisability, therefore light induced electron (e-) and
Valence band hole (h+) can generate redox reaction on the surface of concrete material before compound, will be organic including formaldehyde
Object is oxidized to the simple inorganic matter such as carbon dioxide and water, which can not only effectively degrade indoor formaldehyde, moreover it is possible to remove big
The organic pollutants such as the alkane in gas.In addition, carbon monoxide, nitrogen oxides in atmosphere, the inorganic dirt such as sulfur dioxide and ozone
Dye object can also participate in redox reaction, the pollution-free substance such as carbon dioxide and nitrogen be generated, to realize degradation atmosphere pollution
The function of object.
In order to prove that the Degradation Formaldehyde effect of the application, the present invention have carried out following detection property experimental contrast analysis:
Experimental method:
With the raw material of identical mass percent, test block A and test block B is prepared under the conditions of standard curing, test block A and test block B are
Side length is the test cube of 150mm, wherein test block A be added to titanium dioxide and cadmium sulfide modified photocatalytic it is novel mixed
Solidifying soil test block, test block B is the concrete test block for not adding titanium dioxide and cadmium sulfide, and other components are identical as test block A.
Test block A and test block B are individually positioned in closed air experimental cabin a and closed air experimental cabin b, pass through two respectively
The injection port of experimental cabin injects certain density formaldehyde gas into cabin, under daylight light irradiation, uses air at regular intervals
Mass detecting instrument (model DES-3C) is tested concentration of formaldehyde in the cabin a, b respectively and is changed.Pass through the concentration of formaldehyde in the comparison cabin a, b
Variation, you can get it formaldehyde removal rate that the modified photocatalytic new concrete changes over time.
Experimental procedure:
1, closed air experimental cabin:
Closed air experimental cabin is size 1000mm × 1000mm × 1000mm closed cube transparent glass cabin, and glass is
Bright plate glass, thickness of glass are 10 millimeters, junction the glass rubber and vaseline encapsulation process of glass；The experimental cabin is equipped with
Hatch door having a size of 300mm × 300mm, symmetry shape is provided with thief hatch and injection port, thief hatch and note on the bulkhead of experimental cabin
Rubber stopper is respectively provided in loophole, rubber stopper seals, and injecting hole is provided on rubber stopper, to inject formaldehyde gas
Body.The fluorescent tube for being 30W equipped with 4 power on the inner wall of experimental cabin above thief hatch and injection port, to be photocatalysis
Process provides illumination, is provided with low speed fan in experimental cabin, to be uniformly distributed the air in cabin, prevents formaldehyde part content
It is excessively high.
2, the injection of formaldehyde gas and the detection of concentration:
Test block A and test block B are individually positioned in closed air experimental cabin a and closed air experimental cabin b, then by two air
Experimental cabin is placed in insulating box, and the temperature setting of insulating box is 28 DEG C.Be separately turned on fan in two air test cabins and
Then formaldehyde gas is slowly injected into closed air experimental cabin a and closed air experimental cabin b respectively by injection port by fluorescent lamp
Interior, the formaldehyde gas concentration of injection is 2.0mg/m3.
After completing formaldehyde gas injection work, every two hours progresss one-time detections, i.e., experiment progress to 0h, 2h, 4h, 6h, 8h,
When 10h, 12h, it is utilized respectively the concentration of formaldehyde that air quality detector measures the time point, and confined air is calculated by analysis meter
Degradation Formaldehyde rate in gas experimental cabin a.
As seen from the above table, the concentration of formaldehyde of air test cabin a is decreased obviously after 12 hours, and degradation rate has reached 87.5%,
And the concentration of formaldehyde variation of the air test cabin b as control is unobvious, it can be seen that, the modified photocatalytic new concrete
Formaldehyde light degradation effect is significantly stronger than normal concrete.
Claims (2)
1. a kind of visible light-responded modified photocatalytic New Style Concrete Materials, it is characterised in that: it is by following mass percent
Material synthesis be made:
8% water of cement, 8.1% sand, 27.4% coarse aggregate 45.3%
0.3% dispersing agent of water-reducing agent, 0.1% cadmium sulfide 0.4%
3.6% silicon ash of titanium dioxide, 1.2% flyash 5.6%；
The cement is 42.5 grades of ordinary portland cements,
The sand is sand in IIth area of the clay content less than 2%,
The light-permeable cullet that the coarse aggregate is partial size 8-25 millimeters,
The water-reducing agent is tributyl phosphate,
The dispersing agent is carboxyethyl cellulose,
The silicon ash is wollastonite in powder,
The flyash is II grade of C class flyash.
2. a kind of preparation method of visible light-responded modified photocatalytic New Style Concrete Materials, it is characterised in that: including following
Step:
1) titanium dioxide and cadmium sulfide, are weighed for the ratio of 9:1 in mass ratio, then puts weighed titanium dioxide and cadmium sulfide
It sets in the Stainless Steel Vacuum ball grinder of planetary ball mill；
2) Ball-milling Time of above-mentioned planetary ball mill, is set as 4 hours, revolving speed is set as 600r/min, after the completion of ball milling
Obtain nano-titanium dioxide and Nano cadmium sulphide；
3), above-mentioned nano-titanium dioxide and Nano cadmium sulphide are placed in high temperature furnace, temperature is set as 150 DEG C, temperature setting
It is 3 hours, dry nano-titanium dioxide and dry Nano cadmium sulphide is obtained after heating；
4), dispersing agent is vibrated 5 minutes using ultrasonic wave, then by the nano-titanium dioxide of above-mentioned drying, the nano-sulfur of drying
Cadmium, water and dispersing agent are put into together in the agitator of electric blender, and mixing time is set as 8 minutes, in whipping process not
It is disconnected that water-reducing agent is added；
5) sand, coarse aggregate, silicon ash and flyash, are weighed, another electric blender is added, mixing time is set as 3 minutes, stirs
After the completion of mixing, cement is added into the mixture of sand, coarse aggregate, silicon ash and flyash, continues stirring 2 minutes；
6) above-mentioned steps 5 are mixed with the material for stirring completion in step 4, put stirring in electric blender into together, when stirring
Between be set as 4 minutes, visible light-responded modified photocatalytic New Style Concrete Materials can be obtained.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959866A (en) * | 2022-09-30 | 2023-04-14 | 中建商品混凝土有限公司 | Self-cleaning concrete adopting aluminum-based composite hydrolysis byproducts and preparation method thereof |
| CN116041002A (en) * | 2022-11-01 | 2023-05-02 | 河南金诺混凝土有限公司 | Low-carbonization-value water-washing sand concrete and preparation method thereof |
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|---|---|---|---|---|
| CN102199021A (en) * | 2011-03-26 | 2011-09-28 | 大连理工大学 | Nano-material composite concrete with super high performance |
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2019
- 2019-08-16 CN CN201910756644.6A patent/CN110436850A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199021A (en) * | 2011-03-26 | 2011-09-28 | 大连理工大学 | Nano-material composite concrete with super high performance |
Non-Patent Citations (1)
| Title |
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| 周建伟等: "机械化学合成CdS /TiO2 复合纳米材料及其光催化性能研究", 《人工晶体学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959866A (en) * | 2022-09-30 | 2023-04-14 | 中建商品混凝土有限公司 | Self-cleaning concrete adopting aluminum-based composite hydrolysis byproducts and preparation method thereof |
| CN116041002A (en) * | 2022-11-01 | 2023-05-02 | 河南金诺混凝土有限公司 | Low-carbonization-value water-washing sand concrete and preparation method thereof |
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