CN105289192A - Room-temperature formaldehyde decomposing agent suitable for air purifier and preparation method thereof - Google Patents
Room-temperature formaldehyde decomposing agent suitable for air purifier and preparation method thereof Download PDFInfo
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- CN105289192A CN105289192A CN201510659000.7A CN201510659000A CN105289192A CN 105289192 A CN105289192 A CN 105289192A CN 201510659000 A CN201510659000 A CN 201510659000A CN 105289192 A CN105289192 A CN 105289192A
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Abstract
The invention discloses a room-temperature formaldehyde decomposing agent suitable for an air purifier. Diatomite powder particles are used as nucleuses, ultrafine TiO2 nanobelts grow on the surfaces of the nucleuses, and nano Pt particles are loaded on the TiO2 nanobelts, so as to prepare the room-temperature formaldehyde decomposing agent. The room-temperature formaldehyde decomposing agent is characterized in that the room-temperature formaldehyde decomposing agent is a composite material which is prepared by using the diatomite powder particles as carriers and loading the ultrafine TiO2 nanobelts, wherein the ultrafine TiO2 nanobelts and the nano Pt particles form Pt/TiO2 heterostructures, and the loading capacity of the nano Pt particles is 1% to 5% of the total mass of the Pt/TiO2 heterostructures. The formaldehyde decomposing agent can be used for integrating various types of formaldehyde pollution treatment, i.e. the diatomite powder particles with strong adsorbability are used as the nuclei, so as to efficiently capture formaldehyde molecules, the ultrafine TiO2 nanobelts grow on the surfaces of the nucleuses, so that the formaldehyde decomposing agent has a photocatalyst formaldehyde degradation function, and the tiny Pt particles are loaded on the TiO2 nanobelts, so that the formaldehyde molecules are catalyzed at room temperature, and the stable efficient long-term purification of indoor formaldehyde air is really realized.
Description
Technical field
The present invention relates to a kind of air purifying preparation for Formaldehyde Pollution of Indoor Air and preparation method thereof, particularly relate to a kind of room temperature methanal disintegrant being applicable to air cleaner and preparation method thereof.
Background technology
Formaldehyde (chemical molecular formula is HCHO) is liquid colourless and soluble in water, and volatility is very strong, irritant smell.All kinds of artificial board and furniture thereof on the make adopt Lauxite as adhesive usually, are commonly referred to be the maximum emission source of indoor formaldehyde.Newly-decorated room content of formaldehyde is higher, is the inducement of numerous disease.The mucous membrane of formaldehyde to eye, nose, larynx has strong impulse effect, and the most general symptom is exactly eyes irriate and headache, serious caused allergic dermatitis and asthma.The protein coagulating sex change in cell is made, thus function capable of inhibiting cell because formaldehyde can generate nitrogen methylidyne compound with proteins react.In addition, formaldehyde can also generate dichlormetbylether with the ionic chloride reaction in air, and the latter is a kind of carcinogen.Formaldehyde by the high-ratio surface materials adsorption enrichment of indoor, can discharge when indoor temperature raises, thus makes the reset procedure of formaldehyde very long and complicated again, aggravation polluting effect.The limit value of China's " Indoor Air Quality standards " regulation formaldehyde in indoor air is 0.10mg/m
3but new clothes house mean concentration is greater than 0.2mg/m in daily life
3, corresponding to the increasing indoor activity of modern, formaldehyde pollution has more significantly affected the life health of people.
The processing method of traditional reduction indoor formaldehyde concentration has three kinds: 1. strengthen ventilation, liquidate indoor formaldehyde concentration; 2. physics or chemisorbed, reduces indoor free formaldehyde molecule concentration; 3. apply photocatalyst material (as TiO
2) realize under the effect of light, utilize its decomposition through the formaldehyde molecule of photocatalyst catalyst surface.But for Formaldehyde Pollution of Indoor Air, although above three kinds of methods can reduce pollution level to a certain extent, but lower by the mode efficiency strengthening ventilation and physical and chemical adsorption, easily because the adsorption and desorption of indoor object PARA FORMALDEHYDE PRILLS(91,95) molecule causes new pollution.Current photocatalyst material is mainly based on the TiO of ultraviolet light response
2sill, has certain advantage in formaldehyde molecule degraded, but the ultra violet applications of heavy dose also been proposed strict restriction and requirement to the energy and light pollution restriction aspect.
In recent years, along with increasing the weight of of room air pollution, utilize the domestic air purification means that air purifier process room air pollution has become commonplace.Purify air in process at it, main that adopt or above physical and chemical adsorption and photocatalyst method.Physical absorption is as active carbon class, diatom earthen materia, and adsorbance is limited, needs often to change, and along with the change of temperature and humidity, also can form new release; The formaldehyde amount that chemisorbed can process is comparatively large, but most compound for containing certain toxicity, the pollution of New raxa can be caused; TiO
2base photocatalyst has requirement to UV flux, which limit TiO
2the thickness of base catalysis material, limits its mechanical volume catalytic efficiency.
Summary of the invention
For the deficiency of above formaldehyde treated method, the invention provides a kind of room temperature methanal disintegrant being applicable to air cleaner and preparation method thereof.
For obtaining the above-mentioned room temperature methanal disintegrant being applicable to air cleaner, the technical solution used in the present invention and reaction mechanism are: to have the diatomite particle of very strong adsorption capacity for core, realize the efficient capture of its PARA FORMALDEHYDE PRILLS(91,95) molecule, by its superficial growth TiO
2superfine nano band, makes it have photocatalyst Degradation Formaldehyde function, then passes through at TiO
2loaded with nano Pt particle on nanobelt, being formed with diatomite powder granule is carrier loaded superfine Ti O
2nanobelt and the granuloplastic Pt/TiO of Pt nano particle
2heterojunction structure, realizes the constant temperature catalyzing of its PARA FORMALDEHYDE PRILLS(91,95) molecule.
Concrete, the room temperature methanal disintegrant being applicable to air cleaner of the present invention is with diatomite powder granule for core, at its superficial growth superfine Ti O
2nanobelt, then pass through at TiO
2on nanobelt, loaded with nano Pt particle obtains, and it is characterized in that: described room temperature methanal disintegrant is carrier loaded superfine Ti O with diatomite powder granule
2the sandwich of nanobelt, wherein superfine Ti O
2nanobelt and Pt nano particle particle form Pt/TiO
2heterojunction structure, the load capacity of Pt nano particle particle accounts for Pt/TiO
21% ~ 5% of heterojunction structure gross mass; Described diatomite powder particle diameter is 0.5 ~ 8 μm, described superfine Ti O
2nanobelt is the structure of matte, and its width is 10 ~ 40nm, and length is 0.5 ~ 2 μm, and thickness is 1 ~ 6nm, described Pt nano particle particle and TiO
2the heterojunction structure size formed is between 2 ~ 5nm.
The preparation method being applicable to the room temperature methanal disintegrant of air cleaner of the present invention, step is:
(1) isopropyl titanate is taken, according to isopropyl titanate: the amount of concentrated hydrochloric acid mass ratio 2:100 ~ 5:100 joins in concentrated hydrochloric acid, is uniformly mixed 10 ~ 20 minutes, obtained isopropyl titanate hydrochloric acid solution; Take diatomite, according to isopropyl titanate: the amount of diatomite mass ratio 10:100 ~ 50:100, be mixed into by diatomite in obtained isopropyl titanate hydrochloric acid solution, abundant dispersed with stirring is even, obtains mixed solution called after mixed solution 1;
(2) according to isopropyl titanate: softex kw mass ratio is the amount of 110:100, take softex kw, be made into the aqueous solution of 0.8wt%, then be added dropwise in mixed solution 1, obtain solution A, then according to isopropyl titanate: urea quality is than the amount for 1:100, take urea, add in solution A, stir 20 ~ 30 minutes, obtain mixed solution called after mixed solution 2;
(3) according to mixed solution 2: ethylene glycol volume ratio is 1:(3 ± 0.1) amount, get ethylene glycol and mixed solution 2 mix and blend 10 ~ 20 minutes, obtain mixed solution called after precursor solution 3;
(4) gained precursor solution 3 is transferred in hydrothermal reaction kettle, 150 ~ 165 DEG C are incubated 10 ~ 20 hours, after Temperature fall, take out product, utilize alcohol and water respectively to wash 3 ~ 5 times, namely obtaining with diatomite powder granule after drying is carrier loaded superfine Ti O
2the sandwich of nanobelt, called after TiO
2/ diatomite;
(5) by gained TiO
2/ diatomite prepares its ethylene glycol suspension according to the concentration of 5g/L, and stir after 30 minutes under 110 ± 5 DEG C of oil baths, the concentration adding 25% suspension volume is the polyvinylpyrrolidone of the K=30 of 22.5g/L, and accounts for Pt/TiO by the load capacity of Pt
2final gross mass be 1% ~ 5% proportional quantities add the chloroplatinic acid ethylene glycol solution that concentration is 10g/L, continue stirring reaction 6 ~ 10 hours under 110 ± 5 DEG C of oil baths, take out product after cooling, washing is dry, namely obtains the room temperature methanal disintegrant being applicable to air cleaner.
The application of room temperature methanal disintegrant in decomposition formaldehyde in air being applicable to air cleaner of the present invention.
Experiment confirms: room temperature methanal disintegrant of the present invention is put into gas catalysis analytical system, take argon gas as carrier gas, concentration of formaldehyde is that the mist of 600ppm is according to the volume ratio of 4:1 and oxygen mix, pass through methanal disintegrant according to the flow velocity of 50ml/min, utilize infrared spectrum analysis to find: distintegrant PARA FORMALDEHYDE PRILLS(91,95) of the present invention can realize the decomposition of 65% ~ 100%.
It is integrated that the room temperature methanal disintegrant being applicable to air cleaner provided by the invention achieves multiple formaldehyde pollution treatment mechanism, namely pass through there is the diatomite particle of very strong adsorption capacity for core, realize the efficient capture of its PARA FORMALDEHYDE PRILLS(91,95) molecule, by its superficial growth TiO
2superfine nano band, makes it have photocatalyst Degradation Formaldehyde function, then passes through at TiO
2the Pt of upper load extra granular, realizes the constant temperature catalyzing of formaldehyde molecule.And methanal disintegrant ingredient asepsis environment-protecting of the present invention, the defect of existing single purifying and catalyzing formaldehyde gas material can be overcome, efficient solution Formaldehyde Pollution of Indoor Air, overcome the restriction of the mechanical volume catalytic efficiency that existing air purifier exists, realize indoor formaldehyde class purification of air efficiently steady in a long-term.
Accompanying drawing explanation
Fig. 1: be the room temperature methanal disintegrant (Pt/TiO that the embodiment of the present invention 1 gained is applicable to air cleaner
2/ diatomite composite material) electron scanning micrograph, showing described room temperature methanal disintegrant is be carrier loaded superfine Ti O with diatomite powder granule
2the sandwich of nanobelt, wherein superfine Ti O
2nanobelt and Pt nano particle particle form Pt/TiO
2heterojunction structure.
Fig. 2: be the room temperature methanal disintegrant (Pt/TiO that the embodiment of the present invention 1 gained is applicable to air cleaner
2/ diatomite composite material) middle superfine Ti O
2nanobelt and the granuloplastic Pt/TiO of Pt nano particle
2the transmission electron microscope photo of heterojunction structure.
Detailed description of the invention
Embodiment 1
(1) take 0.28g isopropyl titanate, be dispersed in 13.8g concentrated hydrochloric acid, be uniformly mixed 10 minutes, obtained isopropyl titanate hydrochloric acid solution; Taking 1g diatomite is mixed in aforementioned isopropyl titanate hydrochloric acid solution, and abundant dispersed with stirring is even, obtains mixed solution called after mixed solution 1;
(2) take 0.22g softex kw to be dissolved in 27.3ml deionized water, be made into the aqueous solution of 0.8wt%, be then added dropwise in mixed solution 1, obtain solution A; Taking urea 1.96g again joins in solution A, and stir 20 minutes, obtain mixed solution called after mixed solution 2, its cumulative volume is 40ml;
(3) measure 120ml ethylene glycol, with mixed solution 2 mix and blend 10 minutes, obtain mixed solution called after precursor solution 3;
(4) gained precursor solution 3 is transferred in hydrothermal reaction kettle, 150 DEG C are incubated 20 hours, after Temperature fall, take out product, utilize alcohol and water respectively to wash 3 times, namely obtaining with porous diatomite powder granule after namely obtaining drying after drying is carrier loaded superfine Ti O
2the sandwich of nanobelt, called after TiO
2/ diatomite;
(5) 0.3g gained TiO is taken
2/ diatomite is dispersed in 60ml ethylene glycol, makes the TiO that concentration is 5g/L
2/ diatomite suspension, stir after 30 minutes under 110 DEG C of oil baths, the concentration adding 15ml is the polyvinylpyrrolidone (PVP, K=30) of 22.5g/L, the concentration adding 3.95ml is again the chloroplatinic acid ethylene glycol solution of 10g/L, and the load capacity realizing Pt accounts for Pt/TiO
2final gross mass is 5%, to continue under 110 DEG C of oil baths stirring reaction 10 hours, takes out product after cooling, and washing is dry, namely obtains the room temperature methanal disintegrant being applicable to air cleaner.
The above-mentioned room temperature methanal disintegrant (Pt/TiO being applicable to air cleaner
2/ diatomite composite material) electron scanning micrograph see Fig. 1, superfine Ti O in methanal disintegrant
2nanobelt and the granuloplastic Pt/TiO of Pt nano particle
2fig. 2 is shown in by the transmission electron microscope photo of heterojunction structure.
Application: arrived methanal disintegrant 100mg is put into gas catalysis analytical system, take argon gas as carrier gas, concentration of formaldehyde is that the mist of 600ppm is according to the volume ratio of 4:1 and oxygen mix, pass through methanal disintegrant according to the flow velocity of 50ml/min, utilize infrared spectrum analysis to find: distintegrant PARA FORMALDEHYDE PRILLS(91,95) of the present invention can realize the decomposition of 100%.
Embodiment 2
(1) take 0.42g isopropyl titanate, be dispersed in 13.8g concentrated hydrochloric acid, be uniformly mixed 10 minutes, obtained isopropyl titanate hydrochloric acid solution; Taking 1g diatomite is mixed in aforementioned isopropyl titanate hydrochloric acid solution, and abundant dispersed with stirring is even, obtains mixed solution called after mixed solution 1;
(2) take 0.22g softex kw to be dissolved in 27.3ml deionized water, be made into the aqueous solution of 0.8wt%, be then added dropwise in mixed solution 1, obtain solution A; Taking urea 1.96g again joins in solution A, and stir 20 minutes, obtain mixed solution called after mixed solution 2, its cumulative volume is 40ml;
(3) measure 120ml ethylene glycol, with mixed solution 2 mix and blend 10 minutes, obtain mixed solution called after precursor solution 3;
(4) gained precursor solution 3 is transferred in hydrothermal reaction kettle, 165 DEG C are incubated 10 hours, after Temperature fall, take out product, utilize alcohol and water respectively to wash 4 times, namely obtaining with porous diatomite powder granule after namely obtaining drying after drying is carrier loaded superfine Ti O
2the sandwich of nanobelt, called after TiO
2/ diatomite;
(5) 0.3g gained TiO is taken
2/ diatomite is dispersed in 60ml ethylene glycol, makes the TiO that concentration is 5g/L
2/ diatomite suspension, stir after 30 minutes under 110 DEG C of oil baths, the concentration adding 15ml is the polyvinylpyrrolidone (PVP, K=30) of 22.5g/L, the concentration adding 1.58ml is again the chloroplatinic acid ethylene glycol solution of 10g/L, and the load capacity realizing Pt accounts for Pt/TiO
2final gross mass is 2%, to continue under 110 DEG C of oil baths stirring reaction 10 hours, takes out product after cooling, and washing is dry, namely obtains the room temperature methanal disintegrant being applicable to air cleaner.
Application: arrived methanal disintegrant 100mg is put into gas catalysis analytical system, take argon gas as carrier gas, concentration of formaldehyde is that the mist of 600ppm is according to the volume ratio of 4:1 and oxygen mix, pass through methanal disintegrant according to the flow velocity of 50ml/min, utilize infrared spectrum analysis to find: distintegrant PARA FORMALDEHYDE PRILLS(91,95) of the present invention can realize the decomposition of 85-92%.
Embodiment 3
(1) take 0.28g isopropyl titanate, be dispersed in 13.8g concentrated hydrochloric acid, be uniformly mixed 20 minutes, obtained isopropyl titanate hydrochloric acid solution; Taking 0.5g diatomite is mixed in aforementioned isopropyl titanate hydrochloric acid solution, and abundant dispersed with stirring is even, obtains mixed solution called after mixed solution 1;
(2) take 0.22g softex kw to be dissolved in 27.3ml deionized water, be made into the aqueous solution of 0.8wt%, be then added dropwise in mixed solution 1, obtain solution A; Taking urea 1.96g again joins in solution A, and stir 20 minutes, obtain mixed solution called after mixed solution 2, its cumulative volume is 40ml;
(3) measure 120ml ethylene glycol, with mixed solution 2 mix and blend 20 minutes, obtain mixed solution called after precursor solution 3;
(4) gained precursor solution 3 is transferred in hydrothermal reaction kettle, 160 DEG C are incubated 20 hours, after Temperature fall, take out product, utilize alcohol and water respectively to wash 5 times, namely obtaining with porous diatomite powder granule after namely obtaining drying after drying is carrier loaded superfine Ti O
2the sandwich of nanobelt, called after TiO
2/ diatomite;
(5) 0.3g gained TiO is taken
2/ diatomite is dispersed in 60ml ethylene glycol, makes the TiO that concentration is 5g/L
2/ diatomite suspension, stir after 30 minutes under 110 DEG C of oil baths, the concentration adding 15ml is the polyvinylpyrrolidone (PVP, K=30) of 22.5g/L, the concentration adding 1.58ml is again the chloroplatinic acid ethylene glycol solution of 10g/L, and the load capacity realizing Pt accounts for Pt/TiO
2final gross mass is 1%, to continue under 110 DEG C of oil baths stirring reaction 8 hours, takes out product after cooling, and washing is dry, namely obtains the room temperature methanal disintegrant being applicable to air cleaner.
Application: arrived methanal disintegrant 100mg is put into gas catalysis analytical system, take argon gas as carrier gas, concentration of formaldehyde is that the mist of 600ppm is according to the volume ratio of 4:1 and oxygen mix, pass through methanal disintegrant according to the flow velocity of 50ml/min, utilize infrared spectrum analysis to find: distintegrant PARA FORMALDEHYDE PRILLS(91,95) of the present invention can realize the decomposition of 65-76%.
Claims (3)
1. being applicable to a room temperature methanal disintegrant for air cleaner, is with diatomite powder granule for core, at its superficial growth superfine Ti O
2nanobelt, then pass through at TiO
2on nanobelt, loaded with nano Pt particle obtains, and it is characterized in that: described room temperature methanal disintegrant is carrier loaded superfine Ti O with diatomite powder granule
2the sandwich of nanobelt, wherein superfine Ti O
2nanobelt and Pt nano particle particle form Pt/TiO
2heterojunction structure, the load capacity of Pt nano particle particle accounts for Pt/TiO
21% ~ 5% of heterojunction structure gross mass; Described diatomite powder particle diameter is 0.5 ~ 8 μm, described superfine Ti O
2nanobelt is the structure of matte, and its width is 10 ~ 40nm, and length is 0.5 ~ 2 μm, and thickness is 1 ~ 6nm, described Pt nano particle particle and TiO
2the heterojunction structure size formed is between 2 ~ 5nm.
2. be applicable to the preparation method of the room temperature methanal disintegrant of air cleaner described in claim 1, step is:
(1) isopropyl titanate is taken, according to isopropyl titanate: the amount of concentrated hydrochloric acid mass ratio 2:100 ~ 5:100 joins in concentrated hydrochloric acid, is uniformly mixed 10 ~ 20 minutes, obtained isopropyl titanate hydrochloric acid solution; Take diatomite, according to isopropyl titanate: the amount of diatomite mass ratio 10:100 ~ 50:100, be mixed into by diatomite in obtained isopropyl titanate hydrochloric acid solution, abundant dispersed with stirring is even, obtains mixed solution called after mixed solution 1;
(2) according to isopropyl titanate: softex kw mass ratio is the amount of 110:100, takes softex kw, be made into the aqueous solution of 0.8wt%, be then added dropwise in mixed solution 1, obtain solution A; Again according to isopropyl titanate: urea quality, than the amount for 1:100, takes urea, adds in solution A, stir 20 ~ 30 minutes, obtain mixed solution called after mixed solution 2;
(3) according to mixed solution 2: ethylene glycol volume ratio is 1:(3 ± 0.1) amount, get ethylene glycol and mixed solution 2 mix and blend 10 ~ 20 minutes, obtain mixed solution called after precursor solution 3;
(4) gained precursor solution 3 is transferred in hydrothermal reaction kettle, 150 ~ 165 DEG C are incubated 10 ~ 20 hours, after Temperature fall, take out product, utilize alcohol and water respectively to wash 3 ~ 5 times, namely obtaining with diatomite powder granule after drying is carrier loaded superfine Ti O
2the sandwich of nanobelt, called after TiO
2/ diatomite;
(5) by gained TiO
2/ diatomite prepares its ethylene glycol suspension according to the concentration of 5g/L, and stir after 30 minutes under 110 ± 5 DEG C of oil baths, the concentration adding 25% suspension volume is the polyvinylpyrrolidone of the K=30 of 22.5g/L, and accounts for Pt/TiO by the load capacity of Pt
2final gross mass be 1% ~ 5% proportional quantities add the chloroplatinic acid ethylene glycol solution that concentration is 10g/L, continue stirring reaction 6 ~ 10 hours under 110 ± 5 DEG C of oil baths, take out product after cooling, washing is dry, namely obtains the room temperature methanal disintegrant being applicable to air cleaner.
3. be applicable to the room temperature methanal disintegrant of air cleaner described in claim 1 in the application of decomposing formaldehyde in air.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345403A (en) * | 2016-09-26 | 2017-01-25 | 长沙学院 | Kieselguhr-based composite material for catalyzing formaldehyde, and preparation method and application thereof |
| CN106807451A (en) * | 2017-01-18 | 2017-06-09 | 湖北工业大学 | A kind of flexible platinum formaldehyde room temperature oxidation catalyst and preparation method thereof |
| CN107349684A (en) * | 2017-08-23 | 2017-11-17 | 北京大督硅藻新材料技术股份有限公司 | A kind of compound nonwoven cloth and its preparation method and application |
| CN111974156A (en) * | 2019-05-24 | 2020-11-24 | 宁夏大学 | Preparation method of scavenger for efficiently degrading gaseous pollutants |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345403A (en) * | 2016-09-26 | 2017-01-25 | 长沙学院 | Kieselguhr-based composite material for catalyzing formaldehyde, and preparation method and application thereof |
| CN106807451A (en) * | 2017-01-18 | 2017-06-09 | 湖北工业大学 | A kind of flexible platinum formaldehyde room temperature oxidation catalyst and preparation method thereof |
| CN106807451B (en) * | 2017-01-18 | 2019-11-12 | 湖北工业大学 | A kind of flexibility platinum formaldehyde room temperature oxidation catalyst and preparation method thereof |
| CN107349684A (en) * | 2017-08-23 | 2017-11-17 | 北京大督硅藻新材料技术股份有限公司 | A kind of compound nonwoven cloth and its preparation method and application |
| CN111974156A (en) * | 2019-05-24 | 2020-11-24 | 宁夏大学 | Preparation method of scavenger for efficiently degrading gaseous pollutants |
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