CN114700091A - Preparation method and application of environment-friendly efficient toluene scavenger - Google Patents
Preparation method and application of environment-friendly efficient toluene scavenger Download PDFInfo
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- CN114700091A CN114700091A CN202210242861.5A CN202210242861A CN114700091A CN 114700091 A CN114700091 A CN 114700091A CN 202210242861 A CN202210242861 A CN 202210242861A CN 114700091 A CN114700091 A CN 114700091A
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 239000002516 radical scavenger Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 23
- 150000002367 halogens Chemical class 0.000 claims abstract description 23
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
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- 238000000227 grinding Methods 0.000 claims description 6
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- 238000001291 vacuum drying Methods 0.000 claims description 5
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- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- 238000005054 agglomeration Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 3
- 125000003158 alcohol group Chemical group 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
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- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims description 3
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- UBZYKBZMAMTNKW-UHFFFAOYSA-J titanium tetrabromide Chemical compound Br[Ti](Br)(Br)Br UBZYKBZMAMTNKW-UHFFFAOYSA-J 0.000 claims description 3
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 3
- XROWMBWRMNHXMF-UHFFFAOYSA-J titanium tetrafluoride Chemical compound [F-].[F-].[F-].[F-].[Ti+4] XROWMBWRMNHXMF-UHFFFAOYSA-J 0.000 claims description 3
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/135—Halogens; Compounds thereof with titanium, zirconium, hafnium, germanium, tin or lead
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
Abstract
The invention discloses a preparation method and application of an environment-friendly toluene scavenging agent. The toluene scavenger prepared by the invention is TiO modified by halogen2Dispersing in pure water. Due to the doping and surface modification of the halogen, the oxidizing capability of the halogen to toluene under visible light is stronger. Compared with commercial spray-type catalysts, the photocatalytic activity under visible light is remarkably improved. Moreover, the coating has a transparent film spraying effect, can be sprayed on furniture building materials, glass and building walls, is used for removing indoor toluene and purifying air of living spaces, and has wide application prospect in the field of environment.
Description
Technical Field
The invention belongs to the technical field of environment functional materials, provides a preparation method of an environment-friendly toluene scavenging agent, and particularly relates to halogen modified TiO2The preparation of the photocatalysis material and the preparation method of the dispersion liquid thereof, the toluene scavenger is used for treating the volatile organic compounds of the indoor home decoration material.
Background
Volatile organic compounds, such as toluene, formaldehyde, acetaldehyde, are common pollutants in indoor air. Toluene is widely used in paints, adhesives and other building decoration materials, and is one of the common volatile organic compounds in indoor environment. The long-term exposure to toluene causes the building syndrome (SBS), and has the risks of carcinogenesis and mutagenesis, which seriously affects the human health. Currently, various techniques have been applied to remove these contaminants, such as adsorption, catalytic oxidation, and photocatalysis. Compared with the traditional technology, the photocatalysis can continuously play a role, completely mineralizes organic pollutants based on solar energy, and is a promising method for removing indoor pollutants.
Most of the current indoor pollutant scavengers are based on TiO2However, since the photocatalytic dispersion liquid of (2) generally has a problem of poor photocatalytic activity, it is difficult to remove indoor toluene. In the process of preparing the photocatalytic dispersion liquid, the stability of the toluene scavenger is improved mainly by adding a surfactant (such as Chinese patents 202111401812.3, 201510259939.4 and 202110338933.1), organic coating and other means, so that the product requirement of long-term storage is met, the spray coating mode is applied to indoor environment, and organic pollutants are removed by photocatalytic oxidation. However, since the photocatalytic material is mixed with a large amount of additives and surfactants, the surfactants are adsorbed on the surface of the photocatalytic material, which hinders the adsorption of pollutants and occupies catalytic active sites, and furthermore, photo-generated electrons are consumed by the organic matter layer, so that the amount of electrons participating in the degradation of pollutants is reduced, and the overall photocatalytic efficiency is reduced. In addition, most indoor pollutant scavengers (chinese patent 202111401812.3) use TiO2As a catalyst, due to TiO2The forbidden band width is large, the effective utilization of visible light is lacked, and the photocatalytic activity of toluene is poor. Therefore, how to maintain the stability of the toluene scavenger and have excellent photocatalytic activity is urgently needed to be solved.
In view of the above, the invention successfully prepares the environment-friendly high-efficiency toluene scavenger, namely TiO modified by halogen2The visible light response range is widened, the charge repulsion action on the surface of the catalyst is realized, the catalyst is stably dispersed in pure water, and a method of stabilizing TiO by using a large amount of surfactant and organic coating is not needed2The dispersion liquid is more environment-friendly by using pure water as a solvent of the toluene scavenger. The toluene scavenger prepared by the method has excellent visible light catalysisThe activity, can be stably stored, is suitable for spraying, and has wide application prospect for removing indoor organic pollutants.
Disclosure of Invention
The invention aims to overcome the defects that the traditional indoor pollutant scavenger is added with a large amount of surfactant and TiO2The preparation and the application of the environment-friendly high-efficiency toluene scavenging agent with pure water as a solvent are provided for the defects of low utilization rate of visible light and the like. The prepared toluene scavenging agent has obviously improved stability for photocatalytic oxidation of toluene.
The purpose of the invention is realized by the following technical scheme:
a preparation method of an environment-friendly high-efficiency toluene scavenging agent comprises the following steps:
(1) adding an inorganic titanium source into an organic solvent, stirring for a period of time at a certain water bath temperature to uniformly mix the precursors, and reacting completely to form sol.
(2) Adding the sol obtained in the step 1 into a reaction kettle lining, and performing hydrothermal crystallization to prepare halogen modified TiO2A catalyst powder.
(3) The catalyst was washed repeatedly and then dried in a vacuum oven.
(4) Fully grinding the catalyst dried in the step (3) to destroy soft agglomeration of the nano material to obtain the halogen modified TiO with uniform particle size2A catalyst. Weighing a certain amount of catalyst, placing the catalyst in pure water, uniformly mixing, and dispersing by using dispersing equipment to prepare the environment-friendly high-efficiency toluene scavenging agent taking the pure water as a solvent.
In the method, in the step (1), the inorganic titanium source includes titanium tetrafluoride, titanium tetrachloride and titanium tetrabromide. The volume ratio of the inorganic titanium source to the organic solvent is less than 1, and the mass concentration of the inorganic titanium source is 0-9 mol/L.
In the above method, in the step (1), the organic solvent is an alcohol including methanol, ethanol, ethylene glycol, diethylene glycol, isopropanol, 1-butanol, isobutanol, 1-pentanol, 2-pentanol, 3-pentanol, benzyl alcohol, glycerol or sorbitol.
In the method, in the step (1), the required preparation process is carried out in a water bath kettle, and the temperature is controlled to be 10-20 ℃.
In the method, in the step (1), the speed of adding the inorganic titanium source is 1d/s-2d/s, so that the local concentration is prevented from being too high. The stirring speed is 500-800rpm while avoiding splashing of the reaction precursor liquid, so as to ensure that the reactants are fully contacted.
In the method, in the step (1), after the precursors are uniformly mixed, the stirring is continued for 10-30min, and viscous sol is obtained.
In the method, in the step (1), the sol is added into the inner liner of the hydrothermal reaction kettle, and the added sol accounts for 10-25% of the inner liner. And (3) putting the reaction kettle into an oven for hydrothermal crystallization reaction, and keeping the temperature of the oven at 100 ℃ and 180 ℃. The hydrothermal reaction time is kept for 4-16 h.
In the method, in the step (3), the temperature of the vacuum drying oven is 60-100 ℃, and the drying time is 6-12 h.
In the method, in the step (4), the grinding mode is one of a planetary ball mill, a laboratory roller ball mill, a laboratory stirring ball mill, a laboratory light horizontal ball mill, an agate mortar, an alumina mortar and a ceramic mortar.
In the above method, in the step (4), the halogen modified catalyst has a mass of 0 to 10g and is dispersed in 100mL of pure water.
In the method, in the step (4), the used dispersion mode is selected from one of ultrasonic dispersion, magnetic stirring and mechanical stirring, and the dispersion time is 20-80 min.
In which of the above methods, in the step (4), the halogen-modified catalyst is F-modified TiO2Cl-modified TiO2Br modified TiO2Wherein the mass of the halogen modified catalyst is 0-10g, the addition amount of the halogen modified catalyst is not 0, and the halogen modified catalyst is dispersed in 100mL of pure water.
An environment-friendly efficient toluene remover is used for removing indoor toluene and purifying air of living space, and has wide application prospect in the field of environment.
Prepared by the inventionThe toluene scavenger is essentially different from the existing indoor pollutant scavenger. The method has the advantages that the organic solvent is replaced by pure water, the environment is protected, the addition of the surfactant is removed, the full absorption of the light energy by the photocatalysis can be ensured, more generated oxidation active species can be transferred to pollutants, the utilization of the oxidation species is improved, and the photocatalysis performance is improved. Can be stably stored for a long time without using a surfactant or organic matter coating, has no catalyst sedimentation for 2 months, and is suitable for spraying. The present invention relates to TiO modified by halogen2The utilization of visible light is enhanced.
Compared with the prior art, the invention has the following advantages:
the synthetic method is simple, does not need to use a large amount of additives, and meets the aim of green chemistry. The invention modifies TiO by introducing halogen elements2The method widens the absorption range of light, improves the utilization rate of light, and can be widely applied to removing indoor pollutants. The invention is suitable for spraying and is applied to indoor furniture, walls and outer walls to form transparent films, and the visual effect is not influenced.
Drawings
FIG. 1 is a halogen-modified TiO of the present invention2XRD pattern of (a).
FIG. 2 is a diagram of a halogen-modified TiO of the present invention2TEM and EDS images of (a).
FIG. 3 is a diagram of a halogen-modified TiO of the present invention2UV-vis diagram of (1).
FIG. 4 is a graph showing the activity of the high efficiency toluene scavenger of the present invention in degrading toluene under visible light.
FIG. 5 is an activity diagram of the high efficiency toluene scavenger of the present invention for 5 cycles of toluene degradation under visible light.
FIG. 6 is a graph showing the sterilization effect of the efficient toluene scavenger of the present invention on Escherichia coli under visible light.
FIG. 7 shows the sterilization rate of the high-efficiency toluene scavenger of the present invention against E.coli under visible light.
FIG. 8 is a picture of the high efficiency toluene scavenger of the present invention and the effect of spraying on glass.
Detailed Description
The present invention is described in further detail below with reference to specific examples, but the embodiments of the present invention are not limited thereto, and reference may be made to the technology for process parameters that are not particularly labeled.
The invention relates to a preparation method of an environment-friendly efficient toluene scavenger, which comprises the following steps:
(1) adding an inorganic titanium source into an organic solvent, stirring at the water bath temperature to uniformly mix the precursors, and fully reacting to form sol;
(2) adding the sol obtained in the step (1) into a reaction kettle lining, and putting the reaction kettle lining into a drying oven to prepare the halogen modified TiO2A catalyst powder;
(3) and (3) repeatedly washing the catalyst prepared in the step (2) by using the same organic solvent in the step (1), and then, drying the catalyst in a vacuum drying oven.
(4) Fully grinding the dried catalyst in the step (3) to destroy the soft agglomeration of the nano material to obtain the halogen modified TiO with uniform particle size2A catalyst; weighing the catalyst, placing the catalyst in pure water, uniformly mixing, and dispersing by using dispersing equipment to prepare the environment-friendly efficient toluene scavenging agent taking the pure water as a solvent.
In the step (1), the inorganic titanium source comprises more than one of titanium tetrafluoride, titanium tetrachloride and titanium tetrabromide; the mass concentration of the inorganic titanium source is 0-9 mol/L.
In the step (1), the organic solvent is an alcohol substance, and comprises methanol, ethanol, ethylene glycol, diethylene glycol, isopropanol, 1-butanol, isobutanol, 1-pentanol, 2-pentanol, 3-pentanol, benzyl alcohol, glycerol and sorbitol.
In the step (1), the preparation process is carried out in a water bath kettle, and the temperature is controlled to be 0-20 ℃.
In the step (1), the speed of adding the inorganic titanium source is 1d/s-2d/s, so that the local concentration is prevented from being too high; the stirring speed is 500-800rpm while the splashing of the reaction precursor liquid is avoided, so that the reactants are ensured to be fully contacted; and after the precursors are uniformly mixed, continuously stirring for 10-30min to obtain viscous sol.
In the step (2), the added sol accounts for 10-25% of the volume of the inner liner of the reaction kettle; putting the reaction kettle into an oven for hydrothermal crystallization reaction, and keeping the temperature of the oven at 100 ℃ and 180 ℃; the hydrothermal reaction time is kept for 4-16 h.
In the step (3), the temperature of the vacuum drying oven is 60-100 ℃, and the drying time is 6-12 h.
In the step (4), the grinding mode is one of a planetary ball mill, a laboratory roller ball mill, a laboratory stirring ball mill, a laboratory light horizontal ball mill, an agate mortar, an alumina mortar and a ceramic mortar.
The halogen modified catalyst in the step (4) is F modified TiO2Cl-modified TiO2Br modified TiO2The mass of the halogen modified catalyst is 0-10g, the addition amount of the halogen modified catalyst is not 0, and the halogen modified catalyst is dispersed in 100mL of pure water; the used dispersion mode is selected from one of ultrasonic dispersion, magnetic stirring and mechanical stirring, and the dispersion time is 20-80 min.
Example 1
First, 20ml of TiCl was heated in a 10 ℃ water bath at a rate of 1d/s4Adding into 30mL of vigorously stirred absolute ethanol, gradually changing the solution into light yellow sol, continuing stirring for 20min, and transferring the sol into a 100mL reaction kettle lining, wherein the sol accounts for about 15% of the volume of the reaction kettle. And (3) putting the reaction kettle into an oven at 180 ℃, and preserving heat for 16 h. After the reaction kettle is naturally cooled to room temperature, the material is washed for 3 times by absolute ethyl alcohol, and then dried for 12 hours at 60 ℃ to obtain the catalyst. The catalyst was removed and ground to nanopowder using a laboratory stirred ball mill. 0.5g of the catalyst was weighed, dispersed in 100mL of pure water, and ultrasonically dispersed for 30 min. Finally obtaining the environment-friendly high-efficiency toluene scavenging agent. From the X-ray diffraction pattern of the catalyst (FIG. 1), we succeeded in preparing Cl-TiO2And has higher crystallinity. From the TEM image (a in fig. 2), it can be seen that the synthesized nano particle size is similar to the result of XRD. From the high resolution transmission electron microscopy image (b in FIG. 2) ordered lattice fringes with an average spacing of 0.35nm, corresponding to TiO, can be observed2The 101 planes of anatase. High resolution TEM element surfaceScanning (c-f in FIG. 2) shows that Cl is uniformly distributed in TiO2Above, further illustrate Cl-TiO2The successful preparation. UV-vis (FIG. 3) shows that the compounds react with P25 and TiO2In contrast, Cl-TiO2The absorption edge red shift expands the spectral response range, and the catalyst has visible light response.
Example 2
First, 20mL of TiCl was poured in a water bath at 10 ℃ at a rate of 1d/s4Adding into 30mL of vigorously stirred absolute ethanol, gradually changing the solution into light yellow sol, continuing stirring for 20min, and transferring the sol into a 100mL reaction kettle lining, wherein the sol accounts for about 15% of the volume of the reaction kettle. And (3) putting the reaction kettle into an oven at 180 ℃, and preserving heat for 16 h. After the reaction kettle is naturally cooled to room temperature, the material is washed for 3 times by absolute ethyl alcohol, and then dried for 12 hours at 60 ℃ to obtain the catalyst. The catalyst was removed and ground to nanopowder using a laboratory stirred ball mill. 1g of the catalyst was weighed, dispersed in 100mL of pure water, and ultrasonically dispersed for 30 min. Finally obtaining the environment-friendly high-efficiency toluene scavenging agent.
Example 3
First, 30mL of TiCl was put in a water bath at 10 ℃ at a rate of 1d/s4Adding into 30mL of vigorously stirred absolute ethanol, gradually changing the solution into light yellow sol, continuing stirring for 20min, and transferring the sol into a 100mL reaction kettle lining, wherein the sol accounts for about 25% of the volume of the reaction kettle. And (3) putting the reaction kettle into an oven with the temperature of 120 ℃, and preserving the heat for 16 h. After the reaction kettle is naturally cooled to room temperature, the material is washed for 3 times by absolute ethyl alcohol, and then dried for 12 hours at 60 ℃ to obtain the catalyst. The catalyst was removed and ground to nanopowder using a laboratory stirred ball mill. 5g of catalyst is weighed, dispersed in 100mL of pure water and dispersed for 30min by ultrasonic waves. Finally obtaining the environment-friendly high-efficiency toluene scavenging agent.
Example 4
FIG. 4 is a test of the visible activity of a toluene scavenger: spraying 10mL of 0.5% toluene scavenger on 2.5 × 2.5cm glass plate, placing the glass plate in 100mL quartz container with a magnetic stirrer at the bottom, and rotating the stirrer to reverse the volumeThe gas in the reactor is uniform. The light source was a xenon lamp with a visible light filter ((Perfectlight, PLS-SXE300/300 UV)). N is a radical of2The initial concentration of toluene was adjusted by bubbling liquid toluene, which was detected by injection through a 1mL injection needle into a gas chromatograph (GC-9790II) with a hydrogen ion Flame (FID) detector, N2The humidity inside the reactor was maintained at 60% by means of a bubbling tank of pure water.
Example 5
FIG. 5 is a stability evaluation of toluene scavengers: the photocatalytic stability of the high-efficiency toluene scavenger was tested by repeating the photocatalytic experiment of toluene. After each 240min of illumination, N is introduced2/O2The gas mixture was mixed until the toluene in the reactor was completely removed, and then a new round of testing was performed. The initial concentration of toluene was 50ppm, as shown in fig. 5, and the high efficiency toluene scavenger still maintained good photocatalytic activity after 5 cycles.
Example 6
Photocatalytic sterilization test: the liquid culture medium and the solid culture medium are respectively filled in a conical flask, and the materials of the culture medium, a culture dish, a pipette tip, a centrifuge tube and the like are placed in an autoclave at the constant temperature of 121 ℃ for 15min for sterilization treatment. Inoculating Escherichia coli into liquid culture medium, and shake culturing at 37 deg.C at 150r/min for 9 h. 15mL of the cell suspension was washed with sterilized physiological saline 3 times. Then, normal saline was added to prepare an E.coli suspension. The experiment is divided into a blank group and an experimental group. Blank group: the Escherichia coli was cultured by irradiating for 2 hours under visible light. Experimental groups: adding 10mL of 0.5% high-efficiency toluene scavenger, irradiating for 2h under visible light, and culturing Escherichia coli. After the test is complete, the E.coli suspension is diluted 102、104、 106And taking 100 mu L of bacterial suspension, and uniformly coating the bacterial suspension on the surface of the solid culture medium. And (3) inverting the plate, culturing in a constant-temperature incubator at 37 ℃ for 12h, taking out, and calculating the sterilization rate by adopting a colony counting method. The results show that: the blank group still had grown E.coli (a in FIG. 6), and the experimental group had no E.coli growth (b in FIG. 6). As shown in FIG. 7, the sterilization rate of the blank group to E.coli was 3.8%, Cl-TiO2The catalyst had a sterilization rate of 100％。
Example 7
FIG. 8 is a picture of the high efficiency toluene scavenger of the present invention and the effect of spraying on glass. And cleaning 2.5X 2.5cm glass sheets by using a cleaning agent, and drying the glass sheets for later use. 0.5g of halogen-modified TiO2Adding into 100mL of pure water, and performing ultrasonic treatment for 20min to obtain 0.5% high-efficiency toluene scavenger. 10mL of 0.5 percent high-efficiency toluene scavenger is sprayed on a transparent glass sheet and naturally dried to form a transparent film.
The above examples are merely illustrative of the technical solutions of the present invention and not restrictive, and it will be understood by those of ordinary skill in the art that various changes in the details or forms thereof may be made without departing from the spirit and scope of the present invention as defined by the claims.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The preparation method of the environment-friendly high-efficiency toluene scavenger is characterized by comprising the following steps:
(1) adding an inorganic titanium source into an organic solvent, stirring at the water bath temperature to uniformly mix the precursors, and fully reacting to form sol;
(2) adding the sol obtained in the step (1) into a reaction kettle lining, and putting the reaction kettle lining into a drying oven to prepare the halogen modified TiO2A powdered catalyst;
(3) and (3) repeatedly washing the catalyst prepared in the step (2) by using the same organic solvent in the step (1), and then, drying the catalyst in a vacuum drying oven.
(4) Fully grinding the dried catalyst in the step (3) to destroy the soft agglomeration of the nano material to obtain the halogen modified TiO with uniform particle size2Catalyst and process for preparing same(ii) a Weighing halogen modified TiO with uniform particle size2The catalyst is placed in pure water, mixed evenly and dispersed by using dispersing equipment to prepare the environment-friendly high-efficiency toluene scavenging agent taking the pure water as the solvent.
2. The method according to claim 1, wherein in the step (1), the inorganic titanium source comprises one or more of titanium tetrafluoride, titanium tetrachloride and titanium tetrabromide; the mass concentration of the inorganic titanium source is 0-9 mol/L.
3. The method according to claim 1, wherein in the step (1), the organic solvent is an alcohol including methanol, ethanol, ethylene glycol, diethylene glycol, isopropanol, 1-butanol, isobutanol, 1-pentanol, 2-pentanol, 3-pentanol, benzyl alcohol, glycerol, and sorbitol.
4. The method according to claim 1, wherein the preparation process in step (1) is carried out in a water bath, and the temperature is controlled to be 0-20 ℃.
5. The preparation method according to claim 1, wherein in the step (1), the speed of adding the inorganic titanium source is 1d/s-2d/s, so as to avoid over-high local concentration; the stirring speed is 500-800rpm while the splashing of the reaction precursor liquid is avoided, so that the reactants are ensured to be fully contacted; and after the precursors are uniformly mixed, continuously stirring for 10-30min to obtain viscous sol.
6. The preparation method according to claim 1, wherein in the step (2), the added sol accounts for 10-25% of the volume of the inner lining of the reaction kettle; putting the reaction kettle into an oven for hydrothermal crystallization reaction, and keeping the temperature of the oven at 100 ℃ and 180 ℃; the hydrothermal reaction time is kept for 4-16 h.
7. The preparation method according to claim 1, wherein in the step (3), the temperature of the vacuum drying oven is 60-100 ℃ and the drying time is 6-12 h.
8. The preparation method according to claim 1, wherein in the step (4), the grinding manner is one of a planetary ball mill, a laboratory roller ball mill, a laboratory stirred ball mill, a laboratory light horizontal ball mill, an agate mortar, an alumina mortar and a ceramic mortar.
9. The method according to claim 1, wherein the halogen modification catalyst in the step (4) is F-modified TiO2Cl-modified TiO2Br modified TiO2The mass of the halogen modified catalyst is 0-10g, the addition amount of the halogen modified catalyst is not 0, and the halogen modified catalyst is dispersed in 100mL of pure water; the used dispersion mode is selected from one of ultrasonic dispersion, magnetic stirring and mechanical stirring, and the dispersion time is 20-80 min.
10. The application of the environment-friendly high-efficiency toluene remover obtained by the preparation method of any one of claims 1-9 is characterized by being used for removing indoor toluene and purifying air in living spaces.
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