CN111518441A - Visible light catalysis water permeable brick and manufacturing method and application thereof - Google Patents
Visible light catalysis water permeable brick and manufacturing method and application thereof Download PDFInfo
- Publication number
- CN111518441A CN111518441A CN202010435034.9A CN202010435034A CN111518441A CN 111518441 A CN111518441 A CN 111518441A CN 202010435034 A CN202010435034 A CN 202010435034A CN 111518441 A CN111518441 A CN 111518441A
- Authority
- CN
- China
- Prior art keywords
- visible light
- permeable brick
- parts
- agent
- water permeable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- 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
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1668—Vinyl-type polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/04—Pavings made of prefabricated single units made of bricks
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C2201/00—Paving elements
- E01C2201/20—Drainage details
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a visible light catalysis water permeable brick and a manufacturing method and application thereof. The visible light catalysis water permeable brick comprises a water permeable brick matrix and a visible light catalysis layer on the surface of the water permeable brick matrix, wherein the visible light catalysis layer is Fe2O3/g‑C3N4Composite coating by mixing Fe2O3/g‑C3N4The visible light catalytic coating is coated on the permeable brick matrix to prepare the permeable brick. The preparation method comprises the following steps: preparation of Fe2O3/g‑C3N4The visible light catalytic composite material is then uniformly mixed with silica sol, potassium silicate aqueous solution, silane coupling agent, flatting agent, dispersing agent, defoaming agent and thickening agent to obtain a coating, and the coating is coated on the surface of the permeable brick matrix to form Fe2O3/g‑C3N4And (4) compounding a coating. The visible light catalysis water permeable brick has the advantages of high sunlight utilization rate, strong absorption capacity and high visible light catalysis efficiency, can adsorb and effectively catalyze organic pollutants and motor vehicle tail gas, purifies rainwater and prevents blockage.
Description
Technical Field
The invention relates to the technical field of water permeable bricks, in particular to a visible light catalysis water permeable brick and a manufacturing method and application thereof.
Background
With the continuous promotion of urban ecological civilization construction, a sponge city becomes a hot word in the urban development and construction process, and the treatment of urban water body pollution, particularly the treatment of waste water containing organic matters, becomes a hot problem concerned in the world at present. In the water environment treatment process, the low-concentration organic pollutants (pesticides, antibiotics, humus and the like) have more complex component structures and are difficult to degrade biochemically, the water safety is greatly influenced, and the photocatalytic oxidation can effectively solve the pollutants which are difficult to degrade. The research and application of photocatalysis in the field of urban environmental governance, which is a new environmental remediation technology, has gradually received attention from people.
In sponge city construction, the water permeable brick is a common source control water permeable facility. The main function of the water permeable brick is to provide a path for rainwater infiltration, reduce the surface runoff, reduce the flood peak and simultaneously achieve the function of purifying rainwater, and the water permeable brick is widely applied to park construction such as park greenbelts, sponge residential district transformation and the like.
After the water permeable brick is used for a period of time, pores on the surface of the water permeable brick are easily blocked by organic matters, dust and other substances, so that the permeability is reduced, and the service life of the water permeable brick is influenced. The method aims at the problems that two treatment forms are generally adopted, one is to adopt a manual flushing mode to clear away pollutants in the water permeable brick, and the other is to adopt a photocatalysis water permeable brick with a self-cleaning function to decompose the pollutants in the initial rainwater intercepted in the water permeable brick under the action of a photocatalysis material. Most of the existing researches on the photocatalytic water permeable bricks are prepared in a mode that commercial titanium dioxide is loaded in a cement-based material, and for titanium dioxide serving as a semiconductor nano material, the position of a valence band conduction band of the titanium dioxide determines that the material can only utilize 2% of ultraviolet light in sunlight. In addition, the conductivity of the titanium dioxide is not high, so that the transmission of a photon-generated carrier is not facilitated, photon-generated electrons and holes are easy to combine, the photoelectric conversion efficiency is low, and the application effect of the titanium dioxide as a photocatalytic material on the water permeable brick is limited.
Disclosure of Invention
The visible light catalysis water permeable brick has the advantages of visible light catalysis performance, high sunlight utilization rate, strong absorption capacity, high visible light catalysis efficiency, higher specific surface area and porosity, capability of adsorbing and effectively catalyzing organic pollutants and motor vehicle tail gas, rainwater purification and blockage prevention.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the visible light catalysis water permeable brick comprises a water permeable brick matrix and a visible light catalysis layer on the surface of the water permeable brick matrix, wherein the visible light catalysis layer is Fe2O3/g-C3N4Composite coating of said Fe2O3/g-C3N4The composite coating is prepared by mixing Fe2O3/g-C3N4The visible light catalytic coating is coated on a permeable brick matrix to prepare the permeable brick, wherein the Fe2O3/g-C3N4The visible light catalytic coating comprises 1-10 parts by weight of Fe2O3/g-C3N4The visible light catalytic composite material comprises 0.1-0.5 part of a flatting agent, 0.1-0.5 part of a dispersing agent, 0.1-0.2 part of an antifoaming agent, 0.3-1 part of a thickening agent, 40-60 parts of silica sol, 2-4 parts of a potassium silicate aqueous solution, 1-3 parts of a silane coupling agent and 50-85 parts of a fluorocarbon emulsion.
According to the scheme, the thickness of the visible light catalytic layer is 5-10 mm.
According to the scheme, the thickness of the permeable brick substrate is 5-7 cm, and the porosity is 30-50%.
According to the scheme, the mass concentration of the potassium silicate aqueous solution is 30-50%, and the solid content of the fluorocarbon emulsion is 30-50%.
According to the scheme, the leveling agent is polyether siloxane, the dispersing agent is a sodium hexametaphosphate solution with the mass concentration of 0.5-1%, the defoaming agent is polydimethylsiloxane, and the thickening agent is polyurethane.
According to the above scheme, Fe2O3/g-C3N4Fe in visible light catalytic composite material2O3The mass percentage of the component (A) is 1-10%.
According to the scheme, the permeable brick matrix comprises, by mass, 10-15 parts of a high-strength cement-based material, 4-6 parts of construction waste mainly comprising broken bricks, and 3-5 parts of ceramsite; wherein:
the high-strength cement-based material comprises, by mass, 60-80 parts of ordinary portland cement, 14-16 parts of silica fume, 2-3 parts of a water reducing agent, 2-3 parts of sulphoaluminate cement and 10-12 parts of fibers, wherein the mixing amount of the water reducing agent is 7-9% of the weight of the cementing material;
in the construction waste mainly comprising broken bricks, 2-3 parts of construction waste with the particle size of 5-10mm and 3-4.5 parts of construction waste with the particle size of 10-15 mm are counted by weight.
The preparation method of the visible light catalysis water permeable brick comprises the following specific steps:
1) FeSO (ferric oxide) is added4·7H2O and g-C3N4Mixing, placing into a deionized water/ethanol mixed solution, performing ultrasonic treatment, drying, calcining at 500-600 ℃ for 3-4 h, naturally cooling to room temperature, grinding, placing into a deionized water/ethanol mixed solution, performing ultrasonic treatment, and drying to obtain Fe2O3/g-C3N4A visible light catalytic composite;
2) mixing 40-60 parts of silica sol, 2-4 parts of potassium silicate aqueous solution and 1-3 parts of silane coupling agentMixing, then adding 50-85 parts of fluorocarbon emulsion, stirring to obtain a base material, and adding 1-10 parts of Fe obtained in the step 1) into the base material2O3/g-C3N4Uniformly stirring and dispersing the visible light catalytic composite material, 0.1-0.5 part of flatting agent, 0.1-0.5 part of dispersing agent, 0.1-0.2 part of defoaming agent and 0.3-1 part of thickening agent to obtain Fe2O3/g-C3N4Visible light catalytic coatings;
3) fe obtained in step 2)2O3/g-C3N4The visible light catalytic coating is uniformly sprayed on the surface of the permeable brick matrix to form Fe2O3/g-C3N4And (5) compounding the coating to obtain the visible light catalysis water permeable brick.
According to the scheme, in the step 1), FeSO4·7H2O and g-C3N4The mass ratio of (3.5-17.5): 100.
according to the scheme, in the step 1), the volume ratio of the deionized water/ethanol mixed solution is 1 (1-2).
According to the scheme, in the step 1), the ultrasonic time before calcination is 2-4 h; and the ultrasonic time after calcination is 2-4 h.
According to the scheme, in the step 2), the specific steps are as follows: placing the silica sol in a container, and stirring at constant temperature of 30-40 ℃ for 5-10 min; dropwise adding a prepared potassium silicate aqueous solution into silica sol, uniformly stirring, adding a silane coupling agent, continuously stirring for 3-4 hours, then mixing with fluorocarbon emulsion, and uniformly stirring to obtain a base material; then Fe2O3/g-C3N4Adding the visible light catalytic composite material, the flatting agent, the dispersing agent, the defoaming agent and the thickening agent into the base material respectively, and stirring and dispersing uniformly to obtain Fe2O3/g-C3N4Visible light catalytic coating.
According to the scheme, in the step 2), the mass concentration of the potassium silicate aqueous solution is 30-50%, and the solid content of the fluorocarbon emulsion is 30-50%.
According to the scheme, the leveling agent is polyether siloxane, the dispersing agent is sodium hexametaphosphate with the content of 0.5-1%, the defoaming agent is polydimethylsiloxane, the thickening agent is polyurethane, and the silane coupling agent is silane grease, amino silane or epoxy silane.
Provides the application of the visible light catalytic water permeable brick in sponge city water permeable pavement.
The invention has the beneficial effects that:
1. in the visible light catalysis water permeable brick provided by the invention, Fe is arranged on the surface of the water permeable brick substrate2O3/g-C3N4The composite coating endows the permeable brick with visible light catalytic performance, and compared with the traditional ultraviolet light catalysis, the visible light catalysis has better sunlight absorption capacity and utilization rate, and Fe2O3/g-C3N4The visible light catalytic composite material is uniformly distributed in the composite coating, and the visible light catalytic efficiency is high; fe2O3/g-C3N4The composite coating has higher specific surface area and porosity, so that dissolved pollutants in rainwater can be more easily adsorbed after rainfall, and the adsorbed pollutants are effectively decomposed through visible light catalytic reaction under the irradiation of sunlight, so that the rainwater is purified, and the blockage is prevented; the visible light catalysis water permeable brick has the advantages that the removal rate of 10mg/L Rh B in 20min under visible light irradiation is 80%, the removal rate of 60min is 99%, the organic pollutant removal effect is excellent, the chemical stability is good, and the visible light catalysis water permeable brick can be widely applied to sponge city water permeable pavement.
2. The invention is prepared by mixing Fe2O3/g-C3N4Preparing the visible light catalytic composite material into a coating, and then coating the coating on a permeable brick matrix to obtain Fe2O3/g-C3N4The composite coating is a visible light catalytic layer, the obtained visible light catalytic layer has strong bonding force with the water permeable brick substrate, large specific surface area, small aperture, excellent visible light catalytic activity, good stability, simple preparation, simple and easily obtained raw materials, no secondary pollution caused by the components of the materials, and is beneficial to popularization and application.
Drawings
FIG. 1 shows Fe obtained in example 12O3/g-C3N4Concentration time for degrading Rh B by visible light catalysis water permeable brickCurve line.
FIG. 2 shows Fe obtained in example 12O3/g-C3N4N of visible light catalysis permeable brick2Adsorption-desorption isotherms.
FIG. 3 shows Fe obtained in example 12O3/g-C3N4And (4) performing five times of degradation cycle test on RhB by using the visible light catalytic water permeable brick.
FIG. 4 shows Fe in the example of the present invention2O3/g-C3N4The structure schematic diagram of the visible light catalysis water permeable brick comprises 1-a visible light catalysis layer and 2-a water permeable brick matrix.
FIG. 5 shows Fe in the example of the present invention2O3/g-C3N4A mechanism diagram of degrading pollutants by using the visible light catalytic water permeable brick.
Detailed Description
The present invention will be further described with reference to examples.
A visible light catalysis water permeable brick is provided, as shown in figure 4, and comprises a visible light catalysis layer 1 and a water permeable brick substrate 2.
The permeable brick comprises a permeable brick base body 2, 12 parts of a high-strength cement-based material, 5 parts of construction waste mainly comprising broken bricks, 2.5 parts of building waste with the particle size of 6mm, 3.5 parts of building waste with the particle size of 10mm and 3 parts of ceramsite, wherein the permeable brick base body 2 is 5cm in thickness and 30% in porosity, and the permeable brick is formed by mixing the following materials in parts by weight, 60 parts of ordinary portland cement, 14 parts of silica fume, 2 parts of a water reducing agent, 2 parts of sulphoaluminate cement and 10 parts of fibers, and the mixing amount of the water reducing agent is 7% of the weight of a cementing material.
The specific embodiment is as follows:
example 1
The preparation method of the visible light catalysis water permeable brick comprises the following specific steps:
(1) preparation of g-C3N4: after 5g of dicyanodiamine was placed in a beaker, 150mL of deionized water was added, followed by sonication for 4 h. After drying at 60 ℃, dicyanodiamine is transferred into a crucible. Then a crucible is put inThe crucible is placed in a box-type energy-saving resistance furnace, the programmed temperature rise time is set for 4 hours, and then the crucible is kept for 4 hours at 550 ℃. After natural cooling, the generated yellow substance is transferred into a mortar for grinding and then transferred into a beaker, and 150mL of deionized water is added for ultrasonic oscillation for 4 hours. Finally drying at 50 ℃ to obtain g-C3N4。
(2) Preparation of Fe2O3/g-C3N4Visible light catalytic composite material: 0.35g of FeSO was weighed4·7H2O, with 10g of g-C prepared in step (1)3N4And (4) mixing. And putting the mixture into deionized water/ethanol solution with the mass ratio of 1:1, drying after ultrasonic oscillation for 4 hours, and then putting the dried powder into an alumina crucible. Heating the crucible in a muffle furnace, wherein the heating temperature rise program of the muffle furnace is that the temperature rise rate is 5 ℃/min, keeping for 4h after the temperature rises to 600 ℃, and then naturally cooling to room temperature to enable the generated Fe2O3Fully crystallizing. Cooling the sample to room temperature, taking out the sample, fully grinding, placing the sample in deionized water/ethanol solution with the mass ratio of 1:1 again, performing ultrasonic oscillation for 4 hours, and drying to obtain Fe2O3/g-C3N4Visible photocatalytic composite material of Fe2O3The mass percentage of (B) is 1%.
(3) Preparation of Fe2O3/g-C3N4Visible light catalytic coating: 60g of silica sol was placed in a three-necked flask and stirred at a constant temperature of 40 ℃ for 5 min. 4g of a pre-prepared potassium silicate aqueous solution with the mass concentration of 39 percent is slowly dripped into the silica sol and stirred for 3min, 3g of a silane coupling agent KH570 is added, and stirring is continued for 4h to obtain a silica sol/potassium silicate mixed solution for later use. Mixing a silica sol/potassium silicate mixed solution with a fluorocarbon emulsion with a solid content of 30% according to a mass ratio of 45: 55, mixing the materials, and stirring for 40min to obtain a base material; 5g of Fe prepared in step (2)2O3/g-C3N4Adding 0.1g of polyether siloxane, 0.15g of sodium hexametaphosphate with the content of 1%, 0.1g of polydimethylsiloxane and 0.5g of polyurethane into the visible light catalytic composite material, and stirring and dispersing uniformly to obtain Fe2O3/g-C3N4Visible light catalytic coating.
(4) Preparation of Fe2O3/g-C3N4And (3) composite coating: will produce Fe2O3/g-C3N4The visible light catalytic coating is uniformly sprayed on the surface of the permeable brick matrix to obtain Fe2O3/g-C3N4And (5) forming a composite coating with the thickness of 5mm to obtain the visible light catalysis water permeable brick.
The visible light catalysis water permeable brick prepared by the embodiment is subjected to performance test, and the result is as follows:
1. contaminant removal performance
Through a rainfall simulation experiment, compared with the effect of treating organic pollutants by a visible light catalysis water permeable brick and a common water permeable brick, 10mg/L of high-concentration Rh B (rhodamine B dye) is used as a simulated pollutant, a 300W xenon lamp is used as a simulated light source, the influence of ultraviolet light is eliminated by using a filter plate (lambda is more than 420nm), the degradation experiment data is shown in figure 1, the adsorption rate of Rh B under the dark condition reaches 20%, and then the removal rate of Rh B after the visible light with lambda is more than 420nm irradiates for 60min is 99%, so that the photocatalytic water permeable brick has an excellent pollutant removal effect. The common water permeable brick is a water permeable brick substrate without a visible light catalytic layer on the surface.
2. Analysis of specific surface area
The BET test results are shown in FIG. 2, and the analysis of the specific surface area of the surface photocatalytic material shows that Fe2O3The content of Fe2O3/g-C3N41% Fe of composite photocatalytic material2O3/g-C3N4The specific surface area of the visible light catalytic water permeable brick is 14.1053m2And/g is 5 times of that of the common water permeable brick matrix. The average adsorption pore diameter is 8.605nm, the higher specific surface area and the lower pore diameter distribution enable the photocatalytic water permeable brick to adsorb dissolved pollutants in rainwater runoff more easily. The common water permeable brick is a water permeable brick substrate without a visible light catalytic layer on the surface.
3. Visible light catalyst stability test
In order to verify the stability of the photocatalytic water permeable brick, a plurality of simulated degradation Rh B circulation tests are carried out. After each circulation test is finished, the photocatalyst is cleaned only by distilled water, and then the photocatalyst is put into an oven for drying and then subjected to the next photocatalytic degradation test. The results of the cycling tests are shown in FIG. 3. As can be seen from the test results, basically, the degradation capability of Rh B is not obviously reduced after 6 cycles of tests under the room temperature condition, which fully indicates that Fe is contained2O3/g-C3N4The visible light permeable brick made of the visible light catalytic composite material has excellent chemical stability.
4. The performance test result of the visible light catalysis water permeable brick is as follows: the compressive strength reaches 38.5MPa, and the water permeability coefficient is 1.24 mm/s.
Example 2
The preparation method of the visible light catalysis water permeable brick comprises the following specific steps:
(1) preparation of g-C3N4: the preparation method is the same as that of example 1
(2) Preparation of Fe2O3/g-C3N4Visible light catalytic composite material: 1.05g of FeSO are weighed4·7H2O, with 10g of g-C prepared in step (1)3N4Mixing, otherwise the same preparation as in example 1, and finally obtaining Fe2O3/g-C3N4In visible photocatalytic composites, Fe2O3The mass percentage of (B) is 3%.
(3) Preparation of Fe2O3/g-C3N4Visible light catalytic coating: the preparation method is the same as example 1.
(4) Fe prepared in the step (3)2O3/g-C3N4Uniformly spraying the visible light catalytic coating on the surface of the permeable brick matrix to obtain Fe2O3/g-C3N4And (5) forming a composite coating with the thickness of 5mm to obtain the visible light catalysis water permeable brick.
The performance test result of the photocatalytic water permeable brick is as follows: the compressive strength reaches 26.5MPa, and the water permeability coefficient is 1.64 mm/s.
Example 3
The preparation method of the visible light catalysis water permeable brick comprises the following specific steps:
(1) preparation of g-C3N4: the preparation method is the same as example 1.
(2) Preparation of Fe2O3/g-C3N4Visible light catalytic composite material: 1.75g of FeSO are weighed out4·7H2O, with 10g of g-C prepared in step (1)3N4Mixing, otherwise the same as example 1, and finally obtaining Fe2O3/g-C3N4In visible photocatalytic composites, Fe2O3The mass percentage of (B) is 5%.
(3) Preparation of Fe2O3/g-C3N4Visible light catalytic coating: the preparation method is the same as example 1.
(4) Fe prepared in the step (3)2O3/g-C3N4Uniformly spraying the visible light catalytic coating on the surface of the permeable brick matrix to obtain Fe2O3/g-C3N4And (5) forming a composite coating with the thickness of 5mm to obtain the visible light catalysis water permeable brick.
The performance test result of the photocatalytic water permeable brick is as follows: the compressive strength reaches 48.5MPa, and the water permeability coefficient is 0.8 mm/s.
Claims (10)
1. The visible light catalysis water permeable brick comprises a water permeable brick matrix and is characterized by further comprising a visible light catalysis layer on the surface of the water permeable brick matrix, wherein the visible light catalysis layer is Fe2O3/g-C3N4Composite coating of said Fe2O3/g-C3N4The composite coating is prepared by mixing Fe2O3/g-C3N4The visible light catalytic coating is coated on the permeable brick matrix to prepare the permeable brick, wherein the Fe2O3/g-C3N4The visible light catalytic coating comprises 1-10 parts by weight of Fe2O3/g-C3N4Visible light catalytic composite, 0.10.5 part of flatting agent, 0.1-0.5 part of dispersing agent, 0.1-0.2 part of defoaming agent, 0.3-1 part of thickening agent, 40-60 parts of silica sol, 2-4 parts of potassium silicate aqueous solution, 1-3 parts of silane coupling agent and 50-85 parts of fluorocarbon emulsion.
2. The visible light photocatalytic water permeable brick according to claim 1, wherein the Fe2O3/g-C3N4Fe in visible light catalytic composite material2O3The mass percentage of the component (A) is 1-10%.
3. The visible-light-catalyzed water permeable brick according to claim 1, wherein the visible-light-catalyzed layer has a thickness of 5-10 mm.
4. The visible light catalysis water permeable brick according to claim 1, wherein the mass concentration of the potassium silicate aqueous solution is 30-50%, and the solid content of the fluorocarbon emulsion is 30-50%; the leveling agent is polyether siloxane, the dispersing agent is a sodium hexametaphosphate solution with the mass concentration of 0.5-1%, the defoaming agent is polydimethylsiloxane, and the thickening agent is polyurethane.
5. The visible light catalysis water permeable brick according to claim 1,
the permeable brick matrix comprises, by mass, 10-15 parts of a high-strength cement-based material, 4-6 parts of construction waste mainly comprising broken bricks and 3-5 parts of ceramsite; wherein:
the high-strength cement-based material comprises, by mass, 60-80 parts of ordinary portland cement, 14-16 parts of silica fume, 2-3 parts of a water reducing agent, 2-3 parts of sulphoaluminate cement and 10-12 parts of fibers, wherein the mixing amount of the water reducing agent is 7-9% of the weight of the cementing material;
2-3 parts of construction waste mainly comprising broken bricks and 3-4.5 parts of construction waste with the particle size of 5-10mm in parts by weight;
the thickness of the permeable brick substrate is 5-7 cm, and the porosity is 30-50%.
6. A preparation method of a visible light catalysis water permeable brick is characterized by comprising the following specific steps:
1) FeSO (ferric oxide) is added4·7H2O and g-C3N4Mixing, placing into a deionized water/ethanol mixed solution, performing ultrasonic treatment, drying, calcining at 500-600 ℃ for 3-4 h, naturally cooling to room temperature, grinding, placing into a deionized water/ethanol mixed solution, performing ultrasonic treatment, and drying to obtain Fe2O3/g-C3N4A visible light catalytic composite;
2) mixing 40-60 parts of silica sol, 2-4 parts of potassium silicate aqueous solution and 1-3 parts of silane coupling agent, then adding 50-85 parts of fluorocarbon emulsion, stirring to obtain base material, and adding 1-10 parts of Fe obtained in the step 1) into the base material2O3/g-C3N4Uniformly stirring and dispersing the visible light catalytic composite material, 0.1-0.5 part of flatting agent, 0.1-0.5 part of dispersing agent, 0.1-0.2 part of defoaming agent and 0.3-1 part of thickening agent to obtain Fe2O3/g-C3N4Visible light catalytic coatings;
3) fe obtained in step 2)2O3/g-C3N4The visible light catalytic coating is coated on the surface of the permeable brick substrate to form Fe2O3/g-C3N4And (5) compounding the coating to obtain the visible light catalysis water permeable brick.
7. The method according to claim 6, wherein in the step 1), FeSO is used4·7H2O and g-C3N4The mass ratio of (3.5-17.5) to (100); the volume ratio of the deionized water/ethanol mixed solution is 1 (1-2).
8. The preparation method of claim 6, wherein in the step 1), the ultrasonic time before calcination is 2-4 h; and the ultrasonic time after calcination is 2-4 h.
9. The method according to claim 6, wherein in step 2), in particularThe method comprises the following steps: placing the silica sol in a container, and stirring at constant temperature of 30-40 ℃ for 5-10 min; dropwise adding a prepared potassium silicate aqueous solution into silica sol, uniformly stirring, adding a silane coupling agent, continuously stirring for 3-4 hours, then mixing with fluorocarbon emulsion, and uniformly stirring to obtain a base material; then Fe2O3/g-C3N4Adding the visible light catalytic composite material, the flatting agent, the dispersing agent, the defoaming agent and the thickening agent into the base material respectively, and stirring and dispersing uniformly to obtain Fe2O3/g-C3N4Visible light catalytic coatings; the mass concentration of the potassium silicate aqueous solution is 30-50%, the solid content of the fluorocarbon emulsion is 30-50%, the flatting agent is polyether siloxane, the dispersing agent is a sodium hexametaphosphate solution with the mass concentration of 0.5-1%, the defoaming agent is polydimethylsiloxane, the thickening agent is polyurethane, and the silane coupling agent is silane grease, aminosilane or epoxy silane.
10. Use of the visible light photocatalytic water permeable brick according to any one of claims 1 to 5 in sponge city water permeable pavement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010435034.9A CN111518441B (en) | 2020-05-21 | 2020-05-21 | Visible light catalysis water permeable brick and manufacturing method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010435034.9A CN111518441B (en) | 2020-05-21 | 2020-05-21 | Visible light catalysis water permeable brick and manufacturing method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111518441A true CN111518441A (en) | 2020-08-11 |
| CN111518441B CN111518441B (en) | 2022-04-01 |
Family
ID=71905752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010435034.9A Active CN111518441B (en) | 2020-05-21 | 2020-05-21 | Visible light catalysis water permeable brick and manufacturing method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111518441B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537935A (en) * | 2020-12-26 | 2021-03-23 | 福州大学 | Fluorescent photocatalytic water permeable brick and preparation method thereof |
| CN115011244A (en) * | 2022-06-08 | 2022-09-06 | 长安大学 | Self-oxygen-supply self-cleaning type coating for tail gas degradation and preparation method and application thereof |
| CN115180976A (en) * | 2022-07-22 | 2022-10-14 | 济南大学 | Preparation method of photocatalytic cement-based material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507103A (en) * | 2016-02-23 | 2016-04-20 | 河北建研环境科技有限公司 | Lightweight high-strength water permeable brick with photocatalysis effect |
| CN109385159A (en) * | 2018-10-16 | 2019-02-26 | 上海申得欧有限公司 | A kind of photocatalysis exterior wall latex paint and preparation method thereof |
-
2020
- 2020-05-21 CN CN202010435034.9A patent/CN111518441B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507103A (en) * | 2016-02-23 | 2016-04-20 | 河北建研环境科技有限公司 | Lightweight high-strength water permeable brick with photocatalysis effect |
| CN109385159A (en) * | 2018-10-16 | 2019-02-26 | 上海申得欧有限公司 | A kind of photocatalysis exterior wall latex paint and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 代少俊: "ZnO和ZnO/C光催化涂料的制备及其去除NO性能研究", 《新型建筑材料》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537935A (en) * | 2020-12-26 | 2021-03-23 | 福州大学 | Fluorescent photocatalytic water permeable brick and preparation method thereof |
| CN112537935B (en) * | 2020-12-26 | 2022-03-15 | 福州大学 | Fluorescent photocatalytic water permeable brick and preparation method thereof |
| CN115011244A (en) * | 2022-06-08 | 2022-09-06 | 长安大学 | Self-oxygen-supply self-cleaning type coating for tail gas degradation and preparation method and application thereof |
| CN115011244B (en) * | 2022-06-08 | 2023-07-14 | 长安大学 | Self-oxygen-supply self-cleaning type tail gas degradation road paint and preparation method and application thereof |
| CN115180976A (en) * | 2022-07-22 | 2022-10-14 | 济南大学 | Preparation method of photocatalytic cement-based material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111518441B (en) | 2022-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111518441B (en) | Visible light catalysis water permeable brick and manufacturing method and application thereof | |
| CN104446594B (en) | A kind of functional type honeycombed cement based composites and preparation method thereof | |
| Wang et al. | Facile preparation of photocatalytic exposed aggregate concrete with highly efficient and stable catalytic performance | |
| Dagan et al. | Preparation and utilization of organically modified silica-titania photocatalysts for decontamination of aquatic environments | |
| KR101022413B1 (en) | The functionalconcrete block purficating the air and water | |
| CN108671905B (en) | Preparation method of photocatalyst for sewage treatment | |
| Luévano-Hipólito et al. | Self-cleaning coatings based on fly ash and bismuth-photocatalysts: Bi2O3, Bi2O2CO3, BiOI, BiVO4, BiPO4 | |
| Wang et al. | The hierarchical porous structure of substrate enhanced photocatalytic activity of TiO2/cementitious materials | |
| CN101518730B (en) | Composite nanometer titanium dioxide photocatalysis material and preparation method thereof | |
| CA2777642C (en) | Use of a concrete-based element for treatment of gases and volatile compounds | |
| CN102258990B (en) | Method for preparing light sewage treatment material | |
| CN105749893A (en) | Preparation method of modified active carbon fiber with surface-loaded nanometer titanium dioxide (TiO2) | |
| Wang et al. | SiO2/TiO2 composite powders deposited on cement-based materials: Rhodamine B removal and the bonding mechanism | |
| Jia et al. | Adsorption kinetics of the photocatalytic reaction of nano-TiO2 cement-based materials: a review | |
| US11584688B2 (en) | Visible-light-photocatalyzed composite light-transmitting concrete as well as preparation method and application thereof | |
| WO2018176779A1 (en) | Mesoporous ozone oxidation catalyst and preparation and usage method therefor | |
| CN104307473B (en) | A kind of preparation method of the absorption visible light catalytic material for air pollution treatment | |
| CN111359641A (en) | Novel composite immobilized photocatalyst of three-dimensional porous foamed ceramic and preparation method thereof | |
| Janus et al. | Concretes with photocatalytic activity | |
| Zhang et al. | NOx removal ability of photocatalytic cement-based materials with porous structure | |
| CN101912729B (en) | Method for purifying organic polluted gas by utilizing glass ring covered with nanometer titanium dioxide thin film | |
| CN114192133A (en) | Titanium dioxide photocatalytic stock solution, digestion membrane and preparation method thereof | |
| CN108355695A (en) | A kind of special diatom ooze and preparation method having the interior purifying formaldehyde for turning light | |
| CN112892487A (en) | Composite antibacterial air purifying agent and preparation method thereof | |
| CN108201889A (en) | It is a kind of using porous ceramics as the photocatalyst air purifying material of carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |