CN108314469B - Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick - Google Patents

Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick Download PDF

Info

Publication number
CN108314469B
CN108314469B CN201810207188.5A CN201810207188A CN108314469B CN 108314469 B CN108314469 B CN 108314469B CN 201810207188 A CN201810207188 A CN 201810207188A CN 108314469 B CN108314469 B CN 108314469B
Authority
CN
China
Prior art keywords
pavement brick
ceramic
water
permeable
nano
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.)
Active
Application number
CN201810207188.5A
Other languages
Chinese (zh)
Other versions
CN108314469A (en
Inventor
王彦敏
贾坚
乔弘
张爱勤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Jiaotong University
Original Assignee
Shandong Jiaotong University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Jiaotong University filed Critical Shandong Jiaotong University
Priority to CN201810207188.5A priority Critical patent/CN108314469B/en
Publication of CN108314469A publication Critical patent/CN108314469A/en
Application granted granted Critical
Publication of CN108314469B publication Critical patent/CN108314469B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
    • C04B41/5014—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing sulfur in the anion, e.g. sulfides
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5041—Titanium oxide or titanates
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5049—Zinc or bismuth oxides
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/505—Tin oxide

Abstract

The invention relates to a preparation method of a composite nano photocatalytic water-permeable ceramic pavement brick, which comprises the following steps: by dipping or spraying the nano-lightThe precursor sol solution of the catalyst is fixed on the surface and in the pores of the ceramic water-permeable pavement brick, and then is roasted at the temperature of 400-plus-800 ℃ to obtain the composite nano photocatalytic water-permeable ceramic pavement brick. The TiO is loaded by an in-situ loading method by taking the ceramic permeable pavement brick as a carrier2The nanometer photocatalyst directly grows in pores of the ceramic permeable pavement brick, so that the ceramic permeable pavement brick is firmly loaded, can automatically degrade harmful gases such as nitric oxide, sulfide and the like in the air, and dyes such as methylene blue and the like, purifies the air, and is suitable for grounds of crowd-concentrated areas such as residential areas, parks or scenic spots and the like.

Description

Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick
Technical Field
The invention relates to a nano photocatalytic building material, in particular to a preparation method of a composite nano photocatalytic water-permeable ceramic pavement brick.
Background
The purification of automobile tail gas with nanometer material is one of the new air pollution controlling technologies, and the heterogeneous photocatalytic process with semiconductor oxide as catalyst can react at room temperature and mineralize organic pollutant directly under the action of light. TiO 22The nanometer photocatalytic material is nontoxic, harmless to human body and environment, efficient, multifunctional, strong in oxidation-reduction capability, chemical stability, environment-friendly and the like, and is widely applied to various industrial fields. By paving the photocatalytic ceramic pavement water permeable bricks in the crowd-dense area, harmful air such as nitrogen oxide and the like can be degraded, and the air quality is improved.
At present, the number of patent documents for photocatalytic pavior bricks is small, for example, Chinese patent document CN107285670A discloses a titanium dioxide nanowire photocatalytic slurry and concrete, the titanium dioxide nanowire photocatalytic slurry is suitable for being added into concrete, and the titanium dioxide nanowire photocatalytic slurry comprises TiO2Nanowire, TiO2The concentration of the nano-wire in the slurry is 7-14g/L, NO can be obviously removed through photocatalysis, the environment is protected, NO pollution is caused, and the nano-wire slurry has better mechanical property and durability. In addition, the invention also provides titanium dioxide nanowire photocatalytic concrete which comprises concrete and the slurry, can effectively remove NO through photocatalysis, is environment-friendly and pollution-free, and has better mechanical property and durability, and the removal rate of NO is up to more than 61%. However, the photocatalytic slurry is prepared by directly spraying and mixing titanium dioxide nanowires with a binderThe surface of the concrete has the problems of uneven adhesion, falling of titanium dioxide nanowires due to long-term friction of a pavement and the like.
Chinese patent document CN105669135A discloses a preparation method of a composite nano photocatalytic concrete pavement brick, which comprises the following steps: (1) preparing a main body layer material and a surface layer material; (2) firstly, pouring the surface layer material into a mould, then pouring the main body layer material into the mould, then carrying out extrusion forming, and naturally condensing for 2-3h after demoulding and with the upper layer; (3) spraying titanate precursor sol on the surface material by taking cement slurry as a binder, forming a film on the surface material by the titanate precursor sol, and aging for 7-10 days in a clean environment at room temperature to obtain a concrete pavement brick blank; (4) and putting the concrete pavement brick body into a drying furnace to obtain the composite nano photocatalytic concrete pavement brick. However, cement is used as a binder and then a photocatalyst is prepared, so that the problems that cement paste influences irradiation to further influence photocatalytic efficiency, the photocatalyst is not firmly bonded with concrete and the like exist; in the preparation of the photocatalyst surface layer, the cement concrete pavement brick is placed in an environment of 400-450 ℃ for roasting, and great adverse effects are generated on the strength and durability of concrete.
Chinese patent document CN106478029A discloses a high-efficiency photocatalytic concrete material and a manufacturing method thereof, wherein the high-efficiency photocatalytic concrete material comprises nano TiO2Powder, cullet, cement and water, wherein the nano TiO2The weight ratio of the powder is 1-6%, the weight ratio of the cullet slag is 65-70%, the weight ratio of the cement is 25-30%, and the weight ratio of the water is 4-8%. Nano TiO 22The component of the powder comprises TiO2And water, wherein, TiO2Is 98.5% by weight, and the weight ratio of water is 0.05%. The method for manufacturing the high-efficiency photocatalytic concrete material comprises the following steps: s10: respectively taking broken glass slag and nano TiO2Powder, cement, water; s20: the four materials are evenly stirred and poured into a steel mould; s30: compacting the mixed material in the steel mould by a press; s40: and taking out after the mixture is placed for a preset time. However, the light transmittance of the concrete material is still influenced to a certain degree, and TiO2Large consumption, large waste and costHigh problem and TiO is wrapped by cement paste2Are not utilized effectively.
In a word, most of the existing photocatalytic pavement bricks are made of concrete materials, so that the photocatalyst is poor in load firmness, low in strength and unsatisfactory in photocatalytic performance under the same condition.
Disclosure of Invention
Aiming at the problems of the existing photocatalytic pavement materials, the photocatalyst is grown in the pores of the ceramic water-permeable pavement brick by adopting an in-situ loading method, so that the adhesion strength of the ceramic water-permeable pavement brick is greatly improved, and the service life of the photocatalytic pavement brick is prolonged; the photocatalyst is loaded in the ceramic permeable pavement brick, so that dust in pores can be washed by rainwater or a road surface sprinkler and the like, and the catalytic condition of the photocatalyst is ensured.
The technical scheme of the invention is as follows:
a preparation method of a composite nano photocatalytic water-permeable ceramic pavement brick comprises the following steps:
and (3) fixing the precursor sol solution of the nano photocatalyst on the surface and in pores of the ceramic water-permeable pavement brick in a dipping or spraying mode, and then roasting at 400-plus-800 ℃ to obtain the composite nano photocatalytic water-permeable ceramic pavement brick.
According to the invention, preferably, the nano photocatalyst is nano TiO2Nano ZnO, nano CdS or/and nano SnO.
According to the invention, preference is given to nano TiO2The precursor sol of (a) is organic titanium salt or inorganic titanium salt, and further preferably tetra-n-butyl titanate, titanium tetraisopropoxide or titanium tetrachloride;
according to the present invention, preferably, the solvent of the precursor sol solution of the nano photocatalyst is ethanol, water or/and hydrochloric acid;
preferably, the concentration of hydrochloric acid is 2 to 6 mol/L.
According to the present invention, the mass concentration of the precursor sol solution of the nano photocatalyst is preferably 11wt% to 20wt%, and more preferably 12wt% to 15 wt%.
According to the invention, preferably, the ceramic water permeable pathThe water permeability of the facing brick is 2.0 multiplied by 10-2cm/s。
According to the invention, the calcination time is preferably 10 to 40 minutes.
According to the invention, after calcination, the TiO is2The nanometer photocatalyst such as crystal grains grows in situ on the surface and in the pores of the ceramic water-permeable pavement brick.
According to the invention, the photocatalyst can also be nano ZnO, nano CdS or nano SnO.
According to the invention, the ceramic water-permeable pavement brick can be a commercially available ceramic water-permeable pavement brick, which is a high-quality water-permeable building material formed by screening and selecting ceramic raw materials, reasonably organizing the grain composition, adding a bonding agent, and then molding, drying and sintering at high temperature. The water-based coating has the characteristics of high strength, good water permeability, good freeze-thaw resistance, good anti-skid performance and good ecological environmental protection performance, and can improve the microclimate of cities and retard the formation of city floods.
The invention has the following beneficial effects:
1. the invention uses porcelain permeable pavement brick as carrier, and makes TiO by in-situ loading method2The nanometer photocatalyst is directly grown in pores of the ceramic permeable pavement brick, so that the ceramic permeable pavement brick is firmly loaded, can automatically degrade harmful gases such as nitric oxide, sulfide and the like in the air, and dyes such as methylene blue and the like, purifies the air, and is suitable for the ground of a crowd-concentrated area such as a residential area, a park or a scenic spot.
2. The composite nano photocatalytic water-permeable ceramic pavement brick has excellent photocatalytic performance, and the degradation rate of methylene blue solution can reach more than 90% within 60 minutes.
3. The preparation method is simple in preparation steps, and the prepared composite nano photocatalytic water-permeable ceramic pavement brick is firm in load strength, abrasion-resistant and long in service life.
Drawings
FIG. 1 is an SEM image of a raw material ceramic water-permeable pavement brick used in example 1.
Fig. 2 is an SEM image of the composite nano photocatalytic water-permeable ceramic pavement brick prepared in example 1.
FIG. 3 is an EDS image of the raw ceramic water permeable pavement brick used in example 1.
FIG. 4 is an EDS image of the composite nano photocatalytic water permeable ceramic pavement brick prepared in example 1.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention is further illustrated by, but is not limited to, the following specific examples.
In the embodiment, the raw materials are conventional commercial products, wherein the ceramic water-permeable pavement brick is sold by Shandong chatting source ecological environment protection company, and the water permeability is 2.0 multiplied by 10-2cm/s。
Example 1
A preparation method of a composite nano photocatalytic water-permeable ceramic pavement brick comprises the following steps:
(1) ultrasonically cleaning the ceramic permeable pavement brick with deionized water for 30min, and drying for later use;
(2) dissolving tetra-n-butyl titanate in absolute ethanol to form an ethanol solution of tetra-n-butyl titanate, and then adding distilled water, wherein the weight ratio of tetra-n-butyl titanate: anhydrous ethanol: distilled water is 3.5:16:10, the mass fraction of tetrabutyl titanate is 11.86 percent, and titanate precursor sol solution is obtained;
(3) placing the treated ceramic permeable pavement brick into a titanate precursor sol solution, and soaking for 2 hours;
(4) and taking out the soaked ceramic water permeable pavement brick, putting the brick into a roasting furnace, and calcining the brick for 30 minutes at the temperature rising rate of 3-5 ℃/min to 500 ℃ to obtain the composite nano photocatalytic water permeable ceramic pavement brick.
The scanning electron microscope image of the ceramic water-permeable pavement brick used in the embodiment is shown in fig. 1;
the scanning electron microscope image of the composite nano photocatalytic water-permeable ceramic pavement brick prepared by the embodiment is shown in fig. 2.
As can be seen from FIGS. 1 and 2, the nano TiO compound2The crystal grains can directly grow on the surface of the ceramic pavement brick, are distributed uniformly in gaps, have a loose structure and are beneficial to improving the photocatalytic degradation efficiency.
EDS images of the raw ceramic water permeable pavement brick used in example 1 are shown in FIG. 3;
an EDS image of the composite nano photocatalytic water-permeable ceramic pavement brick prepared in this example is shown in fig. 4.
As can be seen from FIGS. 3 and 4, the composite nano photocatalytic water-permeable ceramic pavement brick prepared by the embodiment is successfully compounded with nano TiO2And (4) crystal grains.
Example 2
A preparation method of a composite nano photocatalytic water-permeable ceramic pavement brick comprises the following steps:
(1) ultrasonically cleaning the ceramic permeable pavement brick with deionized water for 30min, and drying for later use;
(2) tetra-n-butyl titanate was dissolved in absolute ethanol to form an ethanol solution of tetra-n-butyl titanate, and then hydrochloric acid (6mol/L) was added, wherein the ratio of tetra-n-butyl titanate: anhydrous ethanol: hydrochloric acid is 4:16:10, the mass fraction of tetrabutyl titanate is 13.3%, and titanate precursor sol solution is obtained;
(3) placing the treated ceramic permeable pavement brick into a titanate precursor sol solution, and soaking for 2 hours;
(4) and taking out the soaked ceramic water permeable pavement brick, putting the brick into a roasting furnace, and calcining the brick for 30 minutes at the temperature rise rate of 3-5 ℃/min to 450 ℃ to obtain the composite nano photocatalytic water permeable ceramic pavement brick.
Example 3
As described in example 1, except that:
the mass fraction of the tetra-n-butyl titanate is 15 percent, and the calcining temperature is 600 ℃.
Example 4
As described in example 1, except that:
the mass fraction of tetrabutyl titanate is 19 percent, and the calcining temperature is 800 ℃.
Example 5
Weighing zinc acetate dihydrate, dissolving the zinc acetate dihydrate in absolute ethyl alcohol, adding ethanolamine with the same mass as the zinc acetate dihydrate, keeping the mass ratio of the ethanolamine to the zinc acetate dihydrate to be 1:1 all the time, placing the mixed solution in a heat-collecting constant-temperature magnetic stirrer, continuously reacting for 2 hours under the condition of constant-temperature water bath at 70 ℃, finally obtaining a clear, transparent, uniform and stable colloidal solution, spraying the colloidal solution onto the ceramic water-permeable pavement brick, and performing heat treatment at 600 ℃ for 2 hours to obtain the ceramic water-permeable pavement brick.
Example 6
Chromium sulfate and sodium sulfide are used as a cadmium source and a sulfur source, ethylenediamine is used as an organic solvent, polyethylene glycol is added as an active agent, the mixture is sprayed on the ceramic water-permeable pavement brick, and the ceramic water-permeable pavement brick is obtained after heat treatment at 600 ℃ for 2 hours.
Example 7
Analytically pure tin tetrachloride (SnCl)4·5H2O) is used as a starting material, deionized water is used for preparing a solution with a certain concentration, ammonia water and a sol forming aid are added under the conditions of controlling the temperature, stirring and other reaction kinetic factors to form sol, then the sol is sprayed on the ceramic permeable pavement brick, and the ceramic permeable pavement brick can be obtained after heat treatment at 600 ℃ for 2 hours.
Comparative example 1
A photocatalytic ceramic water permeable pavement brick comprises the following steps:
(1) ultrasonically cleaning the ceramic permeable pavement brick with deionized water for 30min, and drying for later use;
(2) dissolving tetra-n-butyl titanate in absolute ethanol to form an ethanol solution of tetra-n-butyl titanate, and then adding a hydrochloric acid solution, wherein the weight ratio of tetra-n-butyl titanate: anhydrous ethanol: hydrochloric acid solution (2mol/L) is 1:16:3, the mass ratio is 1, and the mass fraction of tetrabutyl titanate is 5 percent, so as to obtain titanate precursor sol solution;
(3) placing the treated ceramic permeable pavement brick into a titanate precursor sol solution, and standing for 2 hours;
(4) and taking out the soaked ceramic water permeable pavement brick, putting the brick into a roasting furnace, and roasting at the low temperature of 400 ℃ for 30 minutes to obtain the photocatalytic ceramic water permeable pavement brick.
Comparative example 2
A photocatalytic ceramic pavement water permeable brick comprises the following steps:
(1) ultrasonically cleaning the ceramic permeable pavement brick with deionized water for 30min, and drying for later use;
(2) dissolving tetra-n-butyl titanate in absolute ethanol to form an ethanol solution of tetra-n-butyl titanate, and then adding a hydrochloric acid solution, wherein the weight ratio of tetra-n-butyl titanate: anhydrous ethanol: distilled water is 1:4:12, the mass ratio is 5.9 percent of tetra-n-butyl titanate, and titanate precursor sol solution is obtained;
(3) placing the treated ceramic permeable pavement brick into a titanate precursor sol solution, and standing for 2 hours;
(4) and taking out the soaked ceramic water permeable pavement brick, putting the brick into a roasting furnace, and roasting for 30 minutes at 600 ℃ to obtain the photocatalytic ceramic water permeable pavement brick.
Comparative example 3
A photocatalytic ceramic pavement water permeable brick comprises the following steps:
(1) ultrasonically cleaning the ceramic permeable pavement brick with deionized water for 30min, and drying for later use;
(2) dissolving tetra-n-butyl titanate in absolute ethanol to form an ethanol solution of tetra-n-butyl titanate, and then adding a hydrochloric acid solution, wherein the weight ratio of tetra-n-butyl titanate: anhydrous ethanol: hydrochloric acid solution (6mol/L) is 1:8:6, the mass ratio is 1:8:6, the mass fraction of the tetrabutyl titanate is 6.67 percent, and titanate precursor sol solution is obtained;
(3) placing the treated ceramic permeable pavement brick into a titanate precursor sol solution, and standing for 2 hours;
(4) and taking out the soaked ceramic water permeable pavement brick, putting the brick into a roasting furnace, and roasting at the low temperature of 500 ℃ for 30 minutes to obtain the photocatalytic ceramic water permeable pavement brick.
Comparative example 4
A photocatalytic ceramic pavement water permeable brick comprises the following steps:
(1) ultrasonically cleaning the ceramic permeable pavement brick with deionized water for 30min, and drying for later use;
(2) dissolving tetra-n-butyl titanate in absolute ethanol to form an ethanol solution of tetra-n-butyl titanate, and then adding a hydrochloric acid solution, wherein the weight ratio of tetra-n-butyl titanate: anhydrous ethanol: hydrochloric acid solution (6mol/L) is 3:16:9, the mass ratio is that the mass fraction of tetrabutyl titanate is 10.71 percent, and titanate precursor sol solution is obtained;
(3) placing the treated ceramic permeable pavement brick into a titanate precursor sol solution, and standing for 2 hours;
(4) and taking out the soaked ceramic water permeable pavement brick, putting the brick into a roasting furnace, and roasting at the low temperature of 800 ℃ for 30 minutes to obtain the photocatalytic ceramic water permeable pavement brick.
Comparative example 5
As described in example 1, except that:
the calcination temperature was 300 ℃.
Comparative example 6
As described in example 1, except that:
the calcination temperature was 900 ℃.
Test example 1 testing of photocatalytic Properties Using methylene blue degradation method
Methylene blue degradation method: preparing methylene blue solution with a certain concentration, uniformly mixing with nano titanium dioxide slurry with a certain mass, and carrying out ultraviolet irradiation for a certain time in a self-made photocatalytic system. The ultraviolet-visible absorption spectrum of methylene blue was measured on a UV757CRT, and the degradation rate and the adsorption rate were calculated from the absorbance at the maximum absorption wavelength (574 nm). According to the Lambert-beer law, the concentration of the methylene blue solution is in direct proportion to the absorbance of the methylene blue solution, namely the degradation rate of the methylene blue solution can be calculated through a formula 1, and the photocatalytic efficiency is further characterized.
η＝(A0-A1)/A0Formula 1
Wherein eta is the degradation rate of methylene blue;
a0, A-content of organic matter in system before and after ultraviolet irradiation.
The results are shown in Table 1.
TABLE 1 degradation Rate η of different samples to methylene blue solution at different timesD(％)
Figure BDA0001596185190000071
As can be seen from Table 1, the precursor sol solution of the nano photocatalyst is controlled within a proper concentration range, the obtained photocatalytic ceramic pavement water permeable brick has excellent catalytic performance, the concentration is too low, and the obtained photocatalytic ceramic pavement water permeable brick has poor catalytic performance.
The calcination temperature of the invention also has important influence on the catalytic performance of the photocatalytic ceramic pavement water permeable brick, and the nanometer TiO can be influenced when the temperature is too low or too high2The amount of the formed product affects the photocatalytic efficiency.
Test example 2, abrasion resistance, Cyclic usability test
The photocatalysis efficiency of the photocatalysis water-permeable ceramic pavement brick after being worn is tested according to a test method of concrete and product wear resistance (GB/T169925-1997).
TABLE 2 degradation rate eta of the methylene blue solution after 60min for different samples after abrasionD(％)
Numbering Degradation rate eta after 60minD(％)
Example 1 88.87
Example 2 90.30
Example 3 92.55
Example 4 94.00
Example 5 84.36
Example 6 82.64
Example 7 74.63
Comparative example 1 17.01
Comparative example 2 31.23
Comparative example 3 39.62
Comparative example 4 54.02
Comparative example 5 13.26
Comparative example 6 13.60
As can be seen from the experimental data in Table 2, the influence of the abrasion on the photocatalytic efficiency of the photocatalytic ceramic water-permeable pavement brick is small, and the main reason is that the nano TiO is2The water-permeable pavement bricks grow on the surfaces of the water-permeable pavement bricks and in the gaps of the water-permeable pavement bricks in an in-situ loading mode, so that the pavement bricks still have higher photocatalytic efficiency after being worn. However, the photocatalytic efficiency of the pavement bricks in comparative examples 5 and 6 is reduced more, mainly because too high or too low temperature affects TiO2The generation of (d) and the degree of load firmness.

Claims (6)

1. A preparation method of a composite nano photocatalytic water-permeable ceramic pavement brick comprises the following steps:
fixing a precursor sol solution of the nano photocatalyst on the surface and in pores of the ceramic water-permeable pavement brick in a dipping or spraying mode, and then roasting at 400-plus-800 ℃ to obtain the composite nano photocatalytic water-permeable ceramic pavement brick;
the mass concentration of the precursor sol solution of the nano photocatalyst is 11 to 20 weight percent;
the nano photocatalyst is nano TiO2Nano ZnO, nano CdS or/and nano SnO;
the solvent of the precursor sol solution of the nano photocatalyst is ethanol, water or/and hydrochloric acid.
2. The preparation method of the composite nano photocatalytic water permeable ceramic pavement brick according to claim 1, wherein nano TiO is used for preparing the composite nano photocatalytic water permeable ceramic pavement brick2The precursor sol of (2) is organic titanium salt or inorganic titanium salt.
3. The preparation method of the composite nano photocatalytic water-permeable ceramic pavement brick according to claim 2, wherein the organic titanium salt is tetra-n-butyl titanate or titanium tetraisopropoxide, and the inorganic titanium salt is titanium tetrachloride.
4. The preparation method of the composite nano photocatalytic water permeable ceramic pavement brick according to claim 1, wherein the mass concentration of a precursor sol solution of the nano photocatalyst is 12-15 wt%.
5. The method for preparing the composite nano photocatalytic water-permeable ceramic pavement brick according to claim 1, wherein the water permeability of the ceramic water-permeable pavement brick is 2.0 x 10-2cm/s。
6. The preparation method of the composite nano photocatalytic water permeable ceramic pavement brick according to claim 1, wherein the baking time is 10-40 minutes.
CN201810207188.5A 2018-03-14 2018-03-14 Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick Active CN108314469B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810207188.5A CN108314469B (en) 2018-03-14 2018-03-14 Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810207188.5A CN108314469B (en) 2018-03-14 2018-03-14 Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick

Publications (2)

Publication Number Publication Date
CN108314469A CN108314469A (en) 2018-07-24
CN108314469B true CN108314469B (en) 2021-07-13

Family

ID=62901810

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810207188.5A Active CN108314469B (en) 2018-03-14 2018-03-14 Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick

Country Status (1)

Country Link
CN (1) CN108314469B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113429222B (en) * 2021-07-16 2023-02-21 重庆大学 Ag/TiO material 2 Photocatalytic ceramic tile and preparation method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050129853A1 (en) * 2003-12-16 2005-06-16 Ming-Theng Wang Nano photocatalyst coating procedure
CN101838027A (en) * 2010-04-22 2010-09-22 上海凡清环境工程有限公司 Sterilization and photocatalytic oxidation method and device
CN102535725B (en) * 2012-02-17 2014-08-13 大连工业大学 Permeable bricks inlaid with nanometer titanium dioxide and preparation method thereof
CN104478462B (en) * 2014-11-07 2016-08-17 桂林新竹大自然生物材料有限公司 Crystallite bamboo charcoal Tao Zhu of coating catalysis material and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"TiO 2溶胶的制备以及在建筑陶瓷中的应用";刘欣等;《山东陶瓷》;20070625;第30卷(第3期);"2.1TiO2溶胶制备与喷涂"，"2.2热处理" *

Also Published As

Publication number Publication date
CN108314469A (en) 2018-07-24

Similar Documents

Publication Publication Date Title
US8993471B2 (en) Photocatalytic coating
JP3454817B2 (en) Visible light responsive paints, coatings and articles
JP5820799B2 (en) Glaze glass, glaze, and photocatalyst member
US20060099397A1 (en) Ceramic moulded body comprising a photocatalytic coating and method for producing the same
EP2104556B1 (en) Coated roofing granule
KR100408470B1 (en) Photocatalyst composition, substance containing photocatalyst, and material functioning as photocatalyst and process for producing the same
CN102153318B (en) Method for preparing photo-catalytic cement-based material and method for preparing photocatalyst
CN104387119B (en) Photocatalystic self-cleaning TiO 2 ceramic and preparation method thereof
CN106582892A (en) Nanometer TiO2 coating structure, preparation method and uses thereof
CN108314469B (en) Preparation method of composite nano photocatalytic water-permeable ceramic pavement brick
JP4011705B2 (en) Photocatalyst compound, photocatalyst-containing material, photocatalyst function material and method for producing the same
CN105669135A (en) Preparation method of composite type nano-photocatalytic concrete pavement brick
JP4883913B2 (en) Photocatalyst and method for producing the same
JP4024251B2 (en) Charge transfer catalyst, redox functional material using the catalyst, and charge transfer catalyst-containing material
JP2003252626A (en) Titanium dioxide precursor, manufacturing method of the same and titanium dioxide and its manufacturing method using the same
JPH072522A (en) Production of titanium oxide film
JP2007083195A (en) Method for manufacturing photocatalytic body
TWI582292B (en) An environmentally friendly green aggregate surface treatment methods
JPH10212120A (en) Production of titanium dioxide film and titanium dioxide dispersion liquid composition
JP3806998B2 (en) PHOTOCATALYST COMPOSITION, FORMING AGENT THEREOF, AND SUBSTRATE WITH PHOTOCATALYST COMPOSITION
KR101834213B1 (en) Hydrophilic coating composition for granite and coating method using it
KR101299412B1 (en) Bricks coated with ultraviolet-active and visible-light-active photocatalyst and the synthesis method thereof
JP7220224B2 (en) Photocatalyst carrying structure and method for producing the same
JP2000303662A (en) Atmosphere cleaning type ceramic external facing material
JP2004290974A (en) Optical catalyst compound, optical catalyst containing substance, optical catalyst function exerting material and method for manufacturing it

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