CN106732572A - A kind of scavenging material of gaseous contaminant and its preparation method and application - Google Patents

A kind of scavenging material of gaseous contaminant and its preparation method and application Download PDF

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CN106732572A
CN106732572A CN201611008094.2A CN201611008094A CN106732572A CN 106732572 A CN106732572 A CN 106732572A CN 201611008094 A CN201611008094 A CN 201611008094A CN 106732572 A CN106732572 A CN 106732572A
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gaseous contaminant
sorbing material
scavenging material
preparation
reduction
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黄海保
刘高源
叶信国
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Sun Yat Sen University
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Sun Yat Sen University
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    • B01J23/54Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8668Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16Alumino-silicates
    • B01J20/165Natural alumino-silicates, e.g. zeolites
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56Platinum group metals
    • B01J23/64Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/656Manganese, technetium or rhenium
    • B01J23/6562Manganese
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    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/66Silver or gold
    • B01J23/68Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/688Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with manganese, technetium or rhenium
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    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
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Abstract

The invention provides a kind of except the material for air purification of gaseous contaminant, with sorbing material as carrier, supported on carriers has titanium dioxide, Mn oxide and reduction-state noble metal, wherein, the load capacity of titanium dioxide is the 0~60% of sorbing material quality;The load capacity of Mn oxide is the 0.1~10% of sorbing material quality;The load capacity of reduction-state noble metal is the 0.01~1% of sorbing material quality, and the reduction-state noble metal is selected from the one or two kinds of in platinum, palladium, gold, silver, or two or more;Titanium dioxide is modified by the way of modification by ion-doping, with the sorbing material loaded optic catalyst with strong absorption property, efficient, low cost, the composite catalyst of non-secondary pollution is obtained;The composite catalyst can be used to purify the air of a room the VOCs such as middle formaldehyde, benzene, toluene and utilization at room temperature and eliminate O3Gaseous contaminant, the shortcoming for overcoming existing air purifying process removal gaseous contaminant efficiency low.

Description

A kind of scavenging material of gaseous contaminant and its preparation method and application
Technical field
The present invention relates to field of purifier material preparing technology, more particularly, to a kind of scavenging material of gaseous contaminant And its preparation method and application.
Background technology
Room air pollution is also referred to as the special disaster of modern city, has been classified as in the world and the harm public is good for The maximum environmental factor of health.The mankind averagely had more than 80% time to spend in environment indoors daily, and air intake quality accounts for human body More than the 75% of total intake, thus IAQ is of crucial importance to health.Research shows, the pollution of room air 2~10 times more serious than outdoor air of degree, under special circumstances up to 100 times.US Experts detect discovery, indoors air It is middle to there is more than 500 kinds of VOCs(VOC), wherein carcinogen just has kind more than 20, such as benzene, formaldehyde.Meanwhile, China occurs that ozone is exceeded more, and ozone has serious harm to respiratory system of people etc., also as primary after PM2.5 Pollutant.
Air pollution turns into main " killer " for threatening global environment health, is to cause human health not good enough and too early dead The main cause died.The air pollution of the rapid economic developments such as the nations of China and India and densely inhabited district is abnormal serious, and presents Compound features of pollution.Therefore, it is badly in need of high, powerful and simple, the economic purification new product of efficiency of research and development, realizes compound The efficient removal of air pollutants.
Current air purifying process focuses primarily upon the removal of PM2.5 particulate matters, including filtering technique, adsorption technology, low temperature Plasma technique, photocatalysis technology etc., but filtering technique is only effective to particulate matter, and easily form bacterium hotbed;Absorption Technology limited sorption capacity, needs periodic replacement, easily forms secondary pollution;Lower temperature plasma technology high energy consumption, be also easy to produce ozone, The accessory substances such as nitrogen oxides;There are Catalysts Deactivation Problems in traditional photocatalysis technology.Prior art unitary function, limited efficacy, And lack effective purification method for the more serious gas pollutant of harm such as carcinogenic, pathogenic benzene homologues and formaldehyde.
Chinese invention patent CN105457593A discloses a kind of material for air purification, and its preparing raw material includes:Inorganic suction Enclosure material 60~90%, nano titanium oxide 10~30% is obtained by immersion, drying, sintering etc..This material PARA FORMALDEHYDE PRILLS(91,95), ammonia There is certain adsorption effect, but cannot be completely eliminated, be also easy to produce the secondary pollutions such as solid waste.
Chinese invention patent CN105327699A discloses a kind of material for air purification, and its preparing raw material includes inorganic adsorbent Material 60~90%, nano titanium oxide 10~30%, Pt 1~5%.This material PARA FORMALDEHYDE PRILLS(91,95) and ammonia have clearance higher, But it is not good enough to benzene homologues removal effect, and the precious metals pt content for using is high, causes material cost to rise.
The content of the invention
The technical problems to be solved by the invention are the drawbacks described above for overcoming prior art to exist, there is provided a kind of gaseous contamination The scavenging material of thing.
Second object of the present invention is to provide the preparation method of above-mentioned scavenging material.
Third object of the present invention is to provide the application of the scavenging material.
The purpose of the present invention is achieved by the following technical programs:
A kind of scavenging material of gaseous contaminant, with sorbing material as carrier, supported on carriers has titanium dioxide, Mn oxide and Reduction-state noble metal, wherein, the load capacity of titanium dioxide is the 0~60% of sorbing material quality;The load capacity of Mn oxide is suction The 0.1~10% of enclosure material quality;The load capacity of reduction-state noble metal is the 0.01~1% of sorbing material quality, the reduction-state Noble metal is selected from the one or two kinds of in platinum, palladium, gold, silver, or two or more.
Catalyst of the present invention is introducing Mn oxide and noble metal, Mn oxide and precious metal atom energy on carrier Enough adsorb in carrier surface defect, and then form the abundant unit structure in surface, strengthen carrier adsorption.
The preparation method of the scavenging material of gaseous contaminant of the present invention, comprises the following steps:
(1)Soluble manganese oxide is dissolved in first part of absolute ethyl alcohol, adds sorbing material, is sufficiently stirred for;It is subsequently adding metatitanic acid Four butyl esters, inhibitor and soluble precious-metal presoma, are sufficiently stirred for obtaining solution A;
(2)Second part of absolute ethyl alcohol is taken, and water mixes to obtain solution B, and gel is obtained during solution B is instilled into the solution A being stirred vigorously;
(3)Suspension is formed by water is re-dissolved in after gel ageing, drying, roasting;
(4)Liquid reducing agent is added in suspension carries out reduction reaction, and the suspension that will be obtained after reaction carries out separation of solid and liquid, will The scavenging material of gaseous contaminant is obtained final product after solid material drying.
In above-mentioned preparation method, step(1)Middle soluble manganese oxide is dissolved in absolute ethyl alcohol, adds sorbing material, The step ensure that the hydrolysis of Titanium alkoxides below is carried out in the uniform level of molecule, and the effect of inhibitor is mainly use In the hydrolysis rate for alleviating Titanium alkoxides, solution B is instilled in solution A so that Titanium alkoxides occur hydrolysis with water, while also occurring Dehydration and mistake alcohol polycondensation reaction, product are gathered into the particle of 1nm or so and form colloidal sol;Step(3)Ageing can cause Colloidal sol forms three-dimensional network and turns into gel, and drying can remove moisture and organic solvent, and the present invention is mainly additionally added later The reducing agent of liquid, the catalyst that the reduction-state noble metal after reduction is formed can significantly improve catalytic performance and selectivity Energy.
Preferably, step(1)In first part of absolute ethyl alcohol and the volume ratio of butyl titanate be 2~16:1;The metatitanic acid Four butyl esters are 5~150 with the volume ratio of inhibitor:1.
Preferably, step(2)In second part of absolute ethyl alcohol and the volume ratio of water be 1~5:1, second part of ethanol with step Suddenly(1)The volume ratio of middle butyl titanate is 0.1~4:1.
Preferably, step(1)The soluble manganese oxide be selected from manganese acetate, manganese nitrate, manganese sulfate in one kind or Two kinds, or it is two or more.
Preferably, step(1)The soluble precious-metal presoma is soluble villaumite or chlorate, described suppression Preparation is selected from the one or two kinds of in hydrochloric acid, acetic acid, nitric acid, triethanolamine, acetylacetone,2,4-pentanedione, or two or more.
Preferably, step(4)The liquid reducing agent is selected from sodium borohydride, potassium borohydride, hydrazine hydrate, formaldehyde, methyl alcohol One or two kinds of, it is or two or more.
Preferably, step(3)Described in Aging Temperature be normal temperature, the time be more than 10 hours, when being more preferably aged Between be 12~15 hours;Described drying temperature is not less than 100 DEG C, more preferably 100~120 DEG C, the time be 10 hours with On, more preferably 10~12 hours.
Preferably, step(3)Described in sintering temperature be not less than 300 DEG C, more preferably 300~600 DEG C.Time is More than 2 hours, more preferably 3~5 hours.
Preferably, the sorbing material is selected from activated carbon, zeolite, carbon fiber, silica, activated alumina or carbon molecule Sieve, the form of sorbing material is preferably powder, particle, column or cellular.
The present invention also provides application of the scavenging material in the indoor gaseous contaminant of removal;Specifically, the gaseous state Pollutant is ozone and/or formaldehyde and/or benzene and/or toluene and/or VOCs.
Compared with prior art, the invention has the advantages that:
The invention provides a kind of except the material for air purification of gaseous contaminant, with sorbing material as carrier, supported on carriers has Titanium dioxide, Mn oxide and reduction-state noble metal, wherein, the load capacity of titanium dioxide is the 0~60% of sorbing material quality; The load capacity of Mn oxide is the 0.1~10% of sorbing material quality;The load capacity of reduction-state noble metal is sorbing material quality 0.01~1%, the reduction-state noble metal is selected from the one or two kinds of in platinum, palladium, gold, silver, or two or more;Using from The mode of sub- doping vario-property is modified to titanium dioxide, with the sorbing material loaded optic catalyst with strong absorption property, system Efficiently, low cost, the composite catalyst of non-secondary pollution;The composite catalyst removes first in purifying the air of a room at room temperature The gaseous contaminants such as aldehyde, benzene, toluene, the shortcoming for overcoming existing air purifying process removal gaseous contaminant efficiency low, the present invention Advantage be embodied in:
(1)Flexibly, purification function is powerful for occupation mode:Obtained composite catalyst of the invention can individually make at ambient temperature With typical pollutant formaldehyde in Direct Catalytic Oxidation clean room forms room-temperature catalytic oxidation system;Air and room can also be realized The deep purifying and recycling of interior emerging pollutant ozone, by catalytic ozonation and catalytic decomposition purifying VOCs;Or Coordinate uviol lamp to use, form photocatalytic system.
(2)Purification efficiency is high.Composite catalyst of the invention obtained not only can be by physical absorption by gaseous contaminant Enrichment, is then decomposed gaseous contaminant by catalytic action, and room temperature is without high-concentration formaldehyde clearance under the conditions of UV high-speeds> In 95%, UV photocatalytic system, high-speed high concentration benzene and toluene removal rate>90%.
(3)Preparation cost is low.While purification efficiency high is ensured, it is possible to decrease bullion content to 0.01%, catalyst system Standby low cost.
Specific embodiment
Present disclosure is further illustrated below in conjunction with specific embodiment, but be should not be construed as to limit of the invention System.In the case of without departing substantially from spirit of the invention and essence, the modification or replacement made to the inventive method, step, condition belong to In the scope of the present invention.Unless otherwise noted, experimental technique used in embodiment is well known to the skilled person Conventional method and technology, reagent or material are and are obtained by commercial sources.
The 0.1%Pt-0.1%MnO-40%TiO of embodiment 12-AC(T400)
A kind of material for air purification of gaseous contaminant, with activated carbon as carrier, other components account for sorbing material by mass fraction Contain:Titanium dioxide 40%;Manganese oxide 0.1%;Platinum 0.1%.
Specific preparation process is as follows:0.0134g manganese acetates are dissolved in 15mL absolute ethyl alcohols, 3g activated carbons are subsequently adding, It is sufficiently stirred for;Add 2.5mL butyl titanates, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL, 0.01M chloroplatinic acid Solution, is sufficiently stirred for, and is designated as solution A;Take 1mL absolute ethyl alcohols and 0.7mL pure water is mixed and made into B solution;Play is gradually dropped by B is molten The solution A of strong stirring, stirring to gel state;The material of above-mentioned gained is aged 12h at normal temperatures, then in 120 DEG C of drying 11h.The material of drying is put into Muffle furnace, is calcined 3 hours at 400 DEG C.Then material is made suspension, adds sodium borohydride Reduction, after separation of solid and liquid, dries 6 hours in 100 DEG C, obtains -40% titanium dioxide of manganese oxide of 0.1% platinum -0.1%-activated carbon multiple Close catalyst(Catalyst 1, is designated as T400).
The 0.1%Pt-1%MnO-60%TiO of embodiment 22-AC(T600)
It is a kind of except the material for air purification of gaseous contaminant, with activated carbon as carrier, other components account for sorbing material by quality point Number contains:Titanium dioxide 60%;Manganese oxide 1%;Platinum 0.1%.
Specific preparation process is as follows:0.1338g manganese acetates are dissolved in 19mL absolute ethyl alcohols, 3g powder activities are subsequently adding Charcoal, is sufficiently stirred for;Add 7.2mL butyl titanates, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL molar concentrations are 0.01mol/L platinum acid chloride solutions, are sufficiently stirred for, and are designated as solution A;Take 1mL absolute ethyl alcohols and 1mL pure water is mixed and made into B solution;Will The molten gradually drops of B enter the solution A being stirred vigorously, stirring to gel state;The material of above-mentioned gained is aged 14h at normal temperatures, Then 12h is dried at 120 DEG C.The material of drying is put into Muffle furnace, is calcined 3 hours at 600 DEG C.Then material is made suspended Liquid, adds potassium borohydride reduction, after separation of solid and liquid, is dried 8 hours in 100 DEG C, obtains the dioxy of -1% manganese oxide of 0.1% platinum -60% Change titanium-activated carbon composite catalyst(Catalyst 2, is designated as T600).
The 0.5%Pd-0.1%MnO-20%TiO of embodiment 32- zeolite(T500)
It is a kind of except the material for air purification of gaseous contaminant, with zeolite as carrier, other components account for sorbing material by mass fraction Contain:Titanium dioxide 20%;Manganese oxide 0.1%;Palladium 0.5%.
Specific preparation process is as follows:0.0134g manganese acetates are dissolved in 15mL absolute ethyl alcohols, 3g zeolites are subsequently adding, filled Divide stirring;2.6mL butyl titanates are added, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 6.3mL, 0.0242M palladium bichloride is water-soluble Liquid, is sufficiently stirred for, and is designated as solution A;Take 1mL absolute ethyl alcohols and 0.7mL pure water is mixed and made into B solution;By B solution, gradually drop enters The solution A being stirred vigorously, stirring to gel state;The material of above-mentioned gained is aged 12h at normal temperatures, then in 120 DEG C of bakings Dry 10h.The material of drying is put into Muffle furnace, is calcined at 500 DEG C 4 hours, material is then made suspension, add hydrazine hydrate Reduction, after separation of solid and liquid, dries 6 hours in 110 DEG C, obtains -20% titanium dioxide of manganese oxide of 0.5% palladium -0.1%-zeolite and is combined Catalyst(Catalyst 3, is designated as T500).
The 1%Au-2%MnO-30%TiO of embodiment 42- carbon molecular sieve(T300)
It is a kind of except the material for air purification of gaseous contaminant, with carbon molecular sieve as carrier, other components account for sorbing material by quality Fraction contains:Titanium dioxide 30%;Manganese oxide 2%;Gold 1%.
Specific preparation process is as follows:0.2677g manganese acetates are dissolved in 15mL absolute ethyl alcohols, 3g carbon molecules are subsequently adding Sieve, is sufficiently stirred for;Add 3.85mL butyl titanates, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 15.15mL, 0.01M chlorine gold Aqueous acid, is sufficiently stirred for, and is designated as solution A;Take 1mL absolute ethyl alcohols and 1mL pure water is mixed and made into B solution;By the molten gradually drops of B Enter the solution A being stirred vigorously, stirring to gel state;The material of above-mentioned gained is aged 13h at normal temperatures, then at 120 DEG C Drying 11h.The material of drying is put into Muffle furnace, is calcined at 300 DEG C 4 hours, material is then made suspension, add formaldehyde The aqueous solution is reduced, and after separation of solid and liquid, is dried 10 hours in 120 DEG C, obtains -30% titanium dioxide of manganese oxide of 1% gold medal -2%-carbon point Son sieve composite catalyst(Catalyst 4, is designated as T300).
The UV+ photochemical catalysts of embodiment 5
The catalyst that embodiment 1 to embodiment 4 is prepared is used cooperatively with 185nm uviol lamps, constitutes photocatalytic system, is carried The efficiency of height degraded gaseous contaminant.
Comparative example 1
It is a kind of except the material for air purification of gaseous contaminant, with zeolite as carrier, other components account for sorbing material by mass fraction Contain:Manganese oxide 0.1%.
Specific preparation process is as follows:With deionized water dissolving 0.0134g manganese acetate presomas, under stirring, forward 3g zeolites are poured into drive liquid solution, makes it be in slurry condition, and impregnate 12 h under agitation;In 100 DEG C of bar of baking oven Part, is dried, and keeps 12h, and moisture therein is fully evaporated;Dry catalyst is placed in Muffle furnace, is roasted at 550 DEG C Burn 3h.
The catalyst and activated carbon that embodiment 1 to embodiment 5 and comparative example 1 are prepared carry out activity rating.Urge Glass pipe reactor of the performance test of agent in continuous flowing(Caliber 8mm)On carry out, photocatalysis test outside reactor Place two 4W uviol lamps.The catalyst granules for choosing 20~40 mesh 1g carries out performance evaluation.Charge flow rate is 1L/min, indoor Ozone concentration is 90~200ppb, and concentration of formaldehyde is 10ppm, benzene concentration 20ppm, toluene concentration 20ppm in mixed gas.Reaction Device exports concentration of formaldehyde Formaldehyde analyzer(PPM-400, PPM companies of Britain), benzene and toluene concentration gas-chromatography(GC- 9790 plus, Chinese good fortune is stood), ozone concentration detection ozone analyzer(Model49i, the ppb U.S. power & light company).Test Result is as shown in table 1.As can be seen from Table 1, in normal temperature without under the conditions of ultraviolet, the conversion ratio of formaldehyde>85%(Catalysis oxidation is CO2With Water), benzene removal and toluene removal are constantly to decay based on Adsorption.After coordinating uviol lamp use, formaldehyde removal Rate maintains more than 88%, and the clearance long-time stable of benzene maintains more than 80%, and the clearance of toluene is up to more than 85%.Cause This, the catalyst obtained by the present invention has good clean-up effect to gaseous contaminant.
Comparative example 2
The specific preparation process of the catalyst of this comparative example is as follows:0.2677g manganese acetates are dissolved in 15mL absolute ethyl alcohols, then 3g carbon molecular sieves are added, is sufficiently stirred for;Addition 3.85mL butyl titanates, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 15.15mL, 0.01M aqueous solution of chloraurate, are sufficiently stirred for, and are designated as solution A;Take 1mL absolute ethyl alcohols and 1mL pure water is mixed and made into B Solution;The molten gradually drops of B are entered the solution A being stirred vigorously, stirring to gel state;The material of above-mentioned gained is old at normal temperatures Change 13h, then dry 11h at 120 DEG C.The material of drying is put into Muffle furnace, is obtained final product within 4 hours in 300 DEG C of roastings.
The catalyst obtained using this comparative example carries out activity rating, and ibid, its result shows evaluation method:Oxidation state Composite catalyst effect basic to the degradation property of benzene, toluene and catalyst obtained in embodiment 4 maintains an equal level, but formaldehyde goes Except rate drastically declines, as little as 41%.
Comparative example 3
The specific preparation process of the catalyst of this comparative example is as follows:0.1338g manganese acetates are dissolved in 19mL absolute ethyl alcohols, fully Stirring;Add 7.2mL butyl titanates, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL molar concentrations are 0.01mol/L platinum acid chloride solutions, are sufficiently stirred for, and are designated as solution A;Take 1mL absolute ethyl alcohols and 1mL pure water is mixed and made into B solution;Will The molten gradually drops of B enter the solution A being stirred vigorously, stirring to gel state;Then 3g activated carbons are added into colloidal sol.By above-mentioned gained Material be aged 14h at normal temperatures, then 120 DEG C dry 12h.The material of drying is put into Muffle furnace, 3 are calcined at 600 DEG C Hour.Then material is made suspension, adds potassium borohydride reduction, after separation of solid and liquid, dried 8 hours in 100 DEG C, obtained Composite catalyst, as a result finds:Sorbing material is added after forming colloidal sol, causes sorbing material and other components load uneven Even, it is easy to come off, Surface Groups of Active Carbons does not have generation significant change, its absorption property and load type titania catalysis oxidation Synergy can not be formed, therefore its degradation property is greatly reduced.
Comparative example 4
The specific preparation process of the catalyst of this comparative example is as follows:0.1338g manganese acetates are dissolved in 19mL absolute ethyl alcohols, then 3g Powdered Activated Carbons are added, is sufficiently stirred for;Addition 7.2mL butyl titanates, 0.1mL concentrated hydrochloric acids, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL molar concentrations are 0.01mol/L platinum acid chloride solutions, are sufficiently stirred for, and are designated as solution A;Take 1mL absolute ethyl alcohols, 1mL pure Water and the potassium borohydride aqueous solution are mixed and made into B solution;The molten gradually drops of B are entered the solution A being stirred vigorously, stirring to gel State;The material of above-mentioned gained is aged 14h at normal temperatures, then 12h is dried at 120 DEG C.The material of drying is put into Muffle furnace, Composite catalyst is obtained in 600 DEG C of roastings within 3 hours, as a result find:Substantially, particle becomes big to obtained catalyst agglomeration phenomenon, than Surface area diminishes, and causes Catalyst Adsorption performance to be greatly reduced, and the catalysis oxidation ability on composite catalyst surface also declines.

Claims (10)

1. a kind of scavenging material of gaseous contaminant, it is characterised in that with sorbing material as carrier, supported on carriers has titanium dioxide Titanium, Mn oxide and reduction-state noble metal, wherein, the load capacity of titanium dioxide is the 0~60% of sorbing material quality;Manganese is aoxidized The load capacity of thing is the 0.1~10% of sorbing material quality;The load capacity of reduction-state noble metal for sorbing material quality 0.01~ 1%, the reduction-state noble metal is selected from the one or two kinds of in platinum, palladium, gold, silver, or two or more.
2. the preparation method of the scavenging material of gaseous contaminant described in claim 1, it is characterised in that comprise the following steps:
(1)Soluble manganese oxide is dissolved in first part of absolute ethyl alcohol, adds sorbing material, is sufficiently stirred for;It is subsequently adding metatitanic acid Four butyl esters, inhibitor and soluble precious-metal presoma, are sufficiently stirred for obtaining solution A;
(2)Second part of absolute ethyl alcohol is taken, and water mixes to obtain solution B, and gel is obtained during solution B is instilled into the solution A being stirred vigorously;
(3)Suspension is formed by water is re-dissolved in after gel ageing, drying, roasting;
(4)Liquid reducing agent is added in suspension carries out reduction reaction, and the suspension that will be obtained after reaction carries out separation of solid and liquid, will The scavenging material of gaseous contaminant is obtained final product after solid material drying.
3. the preparation method of the scavenging material of gaseous contaminant according to claim 2, it is characterised in that step(1)In A absolute ethyl alcohol is 2~16 with the volume ratio of butyl titanate:1;The volume ratio of the butyl titanate and inhibitor for 5~ 150:1.
4. the preparation method of the scavenging material of gaseous contaminant according to claim 2, it is characterised in that step(2)In Two parts of absolute ethyl alcohols are 1~5 with the volume ratio of water:1, second part of ethanol and step(1)The volume ratio of middle butyl titanate It is 0.1~4:1.
5. according to any one of claim 2 to 4 scavenging material of gaseous contaminant preparation method, it is characterised in that step Suddenly(1)The soluble manganese oxide is selected from the one or two kinds of in manganese acetate, manganese nitrate, manganese sulfate, or two or more.
6. according to any one of claim 2 to 4 scavenging material of gaseous contaminant preparation method, it is characterised in that step Suddenly(1)The soluble precious-metal presoma is soluble villaumite or chlorate, and described inhibitor is selected from hydrochloric acid, vinegar One or two kinds of in acid, nitric acid, triethanolamine, acetylacetone,2,4-pentanedione, or it is two or more.
7. according to any one of claim 2 to 4 scavenging material of gaseous contaminant preparation method, it is characterised in that step Suddenly(4)The liquid reducing agent is selected from the one or two kinds of in sodium borohydride, potassium borohydride, hydrazine hydrate, formaldehyde, methyl alcohol, or Person is two or more.
8. the scavenging material of gaseous contaminant according to claim 1, it is characterised in that the sorbing material is selected from activity Charcoal, zeolite, carbon fiber, silica, activated alumina or carbon molecular sieve.
9. application of the scavenging material described in claim 1 or 8 in the indoor gaseous contaminant of removal.
10. application according to claim 9, it is characterised in that the gaseous contaminant be ozone and/or formaldehyde and/or Benzene and/or toluene and/or VOCs.
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