CN103977811A - A preparation method of a photocatalytic material capable of degrading air pollutants by utilization of an LED light source - Google Patents
A preparation method of a photocatalytic material capable of degrading air pollutants by utilization of an LED light source Download PDFInfo
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- CN103977811A CN103977811A CN201410202371.8A CN201410202371A CN103977811A CN 103977811 A CN103977811 A CN 103977811A CN 201410202371 A CN201410202371 A CN 201410202371A CN 103977811 A CN103977811 A CN 103977811A
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Abstract
The invention discloses a preparation method of a photocatalysis material capable of degrading air pollutants by utilization of an LED light source. The method includes doping one or a mixture of more than two of tourmaline micro powder, mixed rare earth oxides or nitrates and transition metal compounds into foam metal so as to be modified and supported by the foam metal to obtain a photocatalytic material, sintering the photocatalytic material at a certain temperature for a certain period of time to obtain photocatalytic film, wherein the, and assembling the photocatalytic film and a light emitting diode (LED) plane light source with a certain wavelength to obtain an air pollutant photocatalytic degradation module. The method is advantaged by being simple and feasible, less in equipment material, low in cost, and the like. Tests show that: the product of the method can efficiently remove the air pollutants, the removing cycle is short, and the removing rate of formaldehyde is 97.6%. The method can be widely used in the field of poison gas and harmful gas cleaning, and has a wide application prospect.
Description
Technical field
The present invention relates to toxic and harmful and administer field, specifically a kind of preparation method who utilizes the catalysis material of LED light source degraded air pollutants.
Background technology
Room air pollution has become the outstanding problem that jeopardizes human health safety.China Beijing, Shanghai, Tianjin three big city formaldehyde in indoor air exceeding standard rate are respectively 79%, 82%, 81%, and what have even exceeds standard tens times.Room air pollution produces harmful effect to systems such as nerve, immunity, endocrine, reproductions, or carcinogenic, mutagenesis.According to statistics, the mankind 68% disease is caused by air pollution, and 4,000,000 people/years of air pollution are died from the whole world, and wherein, China was 11.1 ten thousand people/years, and therefore, the World Health Organization (WHO) classifies room air pollution one of as the most dangerous factor.Wherein, formaldehyde is one of typical pollutant of room air pollution, and concentration is high, harm is large.
Photocatalysis oxidation technique is owing at normal temperatures and pressures indoor air pollutants being decomposed into CO
2, H
2o, inorganic substances etc., have course of reaction rapidly and efficiently, the feature such as non-secondary pollution, wherein, TiO
2due to have compared with high oxidation activity, stable, nontoxic, inexpensive to light, invest the advantage such as low and become a kind of catalysis material important, that have application prospect.Yet, current TiO
2photocatalysis technology is to take uviol lamp as light source, with high costs, has limited its industrial applications, although can applied solar energy as light source, TiO
2can only utilize the ultraviolet portion of 5% in solar energy, efficiency is very low, and light source has become TiO
2the biggest obstacle of photocatalysis technology industrial applications.
Summary of the invention
The object of this invention is to provide a kind of preparation method that can utilize the catalysis material of LED light source degraded air pollutants, by rare earth, magnesium-yttrium-transition metal, tourmaline etc. to TiO
2the composite doping modification of catalysis material, can utilize there is stabilized intensity, volume is little, luminous voltage is low, the life-span is long, the light emitting diode (LED) of the advantage such as safe and efficient is as light source efficient degradation air pollutants, the method also has simple, low cost and other advantages.
The technical scheme that realizes the object of the invention is:
A preparation method who utilizes the catalysis material of LED light source degraded air pollutants, comprises the following steps:
(1) a certain amount of tourmaline micro mist is added in absolute ethyl alcohol, under continuous stirring action, add butyl titanate, acetylacetone,2,4-pentanedione, after continuing to stir, form A solution;
(2) get a certain amount of rare earth and mix with absolute ethyl alcohol, after stirring, add successively again distilled water, glacial acetic acid to form B solution;
(3) a certain amount of magnesium-yttrium-transition metal is mixed with absolute ethyl alcohol, after stirring, add successively again distilled water, glacial acetic acid to form C solution;
(4) under continuous stirring action, B solution is dropwise added in A solution, continue stirring it is mixed;
(5) under continuous stirring action, C solution is dropwise added in the mixed solution that step (4) obtains, continue to stir 0.2 ~ 8h, then ageing 0.2 ~ 100h forms stable colloidal sol;
(6) ready foam metal is placed in the colloidal sol that step (5) obtains, dip time is 0.1 ~ 5h;
(7) adopt and to lift plated film instrument and at the uniform velocity lift with the speed of 0.1 ~ 20cm/min, be placed in baking oven and dry at 50 ~ 180 ℃ of temperature;
(8) step (6) ~ (7) are operated 1 ~ 10 time repeatedly;
(9) under design temperature, sintering certain hour can obtain being carried on the photocatalysis film on foam metal;
(10) light emitting diode (LED) of getting the certain wavelength of some is assembled into planar light source, and separated by a distance with photocatalysis film, the photocatalysis module of the air pollutants that can obtain degrading.
The granularity of the described tourmaline micro mist of step (1) is 2000 ~ 9000 orders, and its doping is 0.01 ~ 8
wt%.
The described rare earth of step (2) is mishmetal, or one or more of the oxide of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium or nitrate, by identical weight ratio, is mixed, and its doping is 0.01 ~ 9.6
wt%.
The described magnesium-yttrium-transition metal of step (3) is one or more of nitric hydrate chromium, nitric hydrate copper, Ammonium Molybdate Tetrahydrate, iron ammonium sulfate, by identical weight ratio, is mixed, and its doping is 0.01 ~ 7.8
wt%.
The described foam metal of step (6) is nickel foam, foam copper, foamed aluminium, foam iron, foamed alloy etc., and its aperture is 0.1mm ~ 15mm, through-hole rate >=80%.
The described sintering temperature of step (9) is that 300 ~ 900 ℃, sintering time are 0.1 ~ 9h.
The described light emitting diode wave-length coverage of step (10) is 365 ~ 395nm, and the distance of planar light source and photocatalysis film is 0.1 ~ 30cm, and intensity of illumination is 0.1 ~ 25mw/cm
2.
Good effect of the present invention is: by rare earth, magnesium-yttrium-transition metal, tourmaline composite doping modification, make catalysis material can utilize that stabilized intensity, life-span are long, light emitting diode is as the light source air pollutants of degrading safely and efficiently, the removal cycle is short, removal efficiency is high; The present invention also has the advantages such as simple, equipment and materials is few, expense is low.Product of the present invention can be widely used in poison gas and cleaning harmful gas field, has boundless application prospect.
The specific embodiment
Below in conjunction with embodiment, content of the present invention is further described, but is not limitation of the invention.
Embodiment 1
By granularity, be that 3000 object tourmaline micro mists add in 20mL absolute ethyl alcohol, its doping is 0.2
wt%, under continuous stirring action, adds 10mL butyl titanate, 1mL acetylacetone,2,4-pentanedione, forms A solution after stirring; By 0.8
wt% lanthanum nitrate mixes with 20mL absolute ethyl alcohol, adds successively 2mL distilled water, 2.5mL glacial acetic acid to form B solution after evenly again; By 0.5
wtthe nitric hydrate chromium of % mixes with 20mL absolute ethyl alcohol, adds successively 2mL distilled water, 2.5mL glacial acetic acid to form C solution after evenly again; Under continuous stirring action, B solution is dropwise added in A solution, it is mixed, more dropwise add C solution, continue to stir 0.5h, ageing 20h forms stable colloidal sol; By being cut into the nickel foam that is of a size of 145mm * 80mm, being placed in colloidal sol and flooding 0.2h; Employing lifts plated film instrument and at the uniform velocity lifts with the speed of 2cm/min, puts into baking oven in 120 ℃ of oven dry; Flood, lift, dry and repeatedly operate 2 times; At 400 ℃ of temperature, sintering 2h can obtain being carried on the photocatalysis film on foam metal; Get the light emitting diode that wavelength is 375nm (LED) and be assembled into planar light source, and with photocatalysis film at a distance of 7cm, form photocatalytic degradation air pollutants module, its intensity of illumination is 0.25mw/cm
2.
Through 3 parallel tests, draw, the formaldehyde clearance of photocatalysis film is 87.6%.
Embodiment 2
By granularity, be that 4000 object tourmaline micro mists add in 20mL absolute ethyl alcohol, its doping is 0.4
wt%, under continuous stirring action, adds 10mL butyl titanate, 1mL acetylacetone,2,4-pentanedione, forms A solution after stirring; By 1.0
wt% lanthanum nitrate, cerous nitrate mixture (weight ratio is 1:1) mix with 20mL absolute ethyl alcohol, add successively 2mL distilled water, 2.5mL glacial acetic acid to form B solution after evenly again; By 0.7
wtthe nitric hydrate chromium of %, nitric hydrate copper (1:1) mixture mix with 20mL absolute ethyl alcohol, add successively 2mL distilled water, 2.5mL glacial acetic acid to form C solution after evenly again; Under continuous stirring action, B solution is dropwise added in A solution, it is mixed, more dropwise add C solution, continue to stir 1h, ageing 20h forms stable colloidal sol; By being cut into the foam copper that is of a size of 145mm * 80mm, being placed in and in colloidal sol, flooding 0.3h; Employing lifts plated film instrument and at the uniform velocity lifts with the speed of 1.5cm/min, puts into baking oven in 120 ℃ of oven dry; Flood, lift, dry and repeatedly operate 3 times; At 500 ℃ of temperature, sintering 1.5h can obtain being carried on the photocatalysis film on foam metal; Get the light emitting diode that wavelength is 385nm (LED) and be assembled into planar light source, and with photocatalysis film at a distance of 6cm, form photocatalytic degradation air pollutants module, intensity of illumination is 0.25mw/cm
2.
Through 3 parallel tests, draw, the formaldehyde clearance of photocatalysis film is 91.6%.
Embodiment 3
By granularity, be that 5000 object tourmaline micro mists add in 20mL absolute ethyl alcohol, its doping is 0.6
wt%, under continuous stirring action, adds 10mL butyl titanate, 1mL acetylacetone,2,4-pentanedione, forms A solution after stirring; By 1.2
wt% lanthanum nitrate, neodymium nitrate mixture (weight ratio is 1:1) mix with 20mL absolute ethyl alcohol, add successively 2mL distilled water, 2.5mL glacial acetic acid to form B solution after evenly again; By 0.9
wtthe nitric hydrate chromium of %, Ammonium Molybdate Tetrahydrate (1:1) mixture mix with 20mL absolute ethyl alcohol, add successively 2mL distilled water, 2.5mL glacial acetic acid to form C solution after evenly again; Under continuous stirring action, B solution is dropwise added in A solution, it is mixed, more dropwise add C solution, continue to stir 2h, ageing 24h forms stable colloidal sol; By being cut into the nickel foam that is of a size of 145mm * 80mm, being placed in and in colloidal sol, flooding 0.5h; Employing lifts plated film instrument and at the uniform velocity lifts with the speed of 1cm/min, puts into baking oven in 180 ℃ of oven dry; Flood, lift, dry and repeatedly operate 4 times; At 600 ℃ of temperature, sintering 1h can obtain being carried on the photocatalysis film on foam metal; Get the light emitting diode that wavelength is 395nm (LED) and be assembled into planar light source, and with photocatalysis film at a distance of 5cm, form photocatalytic degradation air pollutants module, its intensity of illumination is 0.3mw/cm
2.
Through 3 parallel tests, draw, the formaldehyde clearance of photocatalysis film is 97.6%.
Claims (8)
1. a preparation method who utilizes the catalysis material of LED light source degraded air pollutants, is characterized in that: comprise the following steps:
(1) a certain amount of tourmaline micro mist is added in absolute ethyl alcohol, under continuous stirring action, add butyl titanate, acetylacetone,2,4-pentanedione, after continuing to stir, form A solution;
(2) get a certain amount of rare earth and mix with absolute ethyl alcohol, after stirring, add successively again distilled water, glacial acetic acid to form B solution;
(3) a certain amount of magnesium-yttrium-transition metal is mixed with absolute ethyl alcohol, after stirring, add successively again distilled water, glacial acetic acid to form C solution;
(4) under continuous stirring action, B solution is dropwise added in A solution, continue stirring it is mixed;
(5) under continuous stirring action, C solution is dropwise added in the mixed solution that step (4) obtains, continue to stir 0.2 ~ 8h, then ageing 0.2 ~ 100h forms stable colloidal sol;
(6) ready foam metal is placed in the colloidal sol that step (5) obtains, dip time is 0.1 ~ 5h;
(7) adopt and to lift plated film instrument and at the uniform velocity lift with the speed of 0.1 ~ 20cm/min, be placed in baking oven and dry at 50 ~ 180 ℃ of temperature;
(8) step (6) ~ (7) are operated 1 ~ 10 time repeatedly;
(9) under design temperature, sintering certain hour can obtain being carried on the photocatalysis film on foam metal;
(10) light emitting diode (LED) of getting the certain wavelength of some is assembled into planar light source, and separated by a distance with photocatalysis film, the photocatalysis module of the air pollutants that can obtain degrading.
2. preparation method according to claim 1, is characterized in that: the granularity of the described tourmaline micro mist of step (1) is 2000 ~ 9000 orders, and its doping is 0.01 ~ 8
wt%.
3. preparation method according to claim 1, it is characterized in that: the described rare earth of step (2) is mishmetal, or one or more of the oxide of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium or nitrate, are mixed by identical weight ratio, and its doping is 0.01 ~ 9.6
wt%.
4. preparation method according to claim 1, it is characterized in that: the described magnesium-yttrium-transition metal of step (3) is one or more of nitric hydrate chromium, nitric hydrate copper, Ammonium Molybdate Tetrahydrate, iron ammonium sulfate, by identical weight ratio, be mixed, its doping is 0.01 ~ 7.8
wt%.
5. preparation method according to claim 1, is characterized in that: the described foam metal of step (6) is nickel foam, foam copper, foamed aluminium, foam iron, foamed alloy etc., and its aperture is 0.1mm ~ 15mm, through-hole rate >=80%.
6. preparation method according to claim 1, is characterized in that: the described sintering temperature of step (9) is that 300 ~ 900 ℃, sintering time are 0.1 ~ 9h.
7. preparation method according to claim 1, is characterized in that: the described light emitting diode wave-length coverage of step (10) is 365 ~ 395nm, and the distance of planar light source and photocatalysis film is 0.1 ~ 30cm, and intensity of illumination is 0.1 ~ 25mw/cm
2.
8. the catalysis material that utilizes LED light source degraded air pollutants of preparing by the preparation method one of claim 1-7 Suo Shu.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482191A (en) * | 2018-12-24 | 2019-03-19 | 哈尔滨商业大学 | A kind of foamed nickel supported zinc titanate/tourmaline catalysis material and preparation method thereof |
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| JP3603961B1 (en) * | 2004-03-08 | 2004-12-22 | 英俊 原木 | Functional coating composition and method for improving flammability of internal combustion engine |
| CN1597091A (en) * | 2004-08-31 | 2005-03-23 | 中国建筑材料科学研究院 | High activity photo catalyzed air purifying powder material and its preparation method and application |
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Patent Citations (2)
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| JP3603961B1 (en) * | 2004-03-08 | 2004-12-22 | 英俊 原木 | Functional coating composition and method for improving flammability of internal combustion engine |
| CN1597091A (en) * | 2004-08-31 | 2005-03-23 | 中国建筑材料科学研究院 | High activity photo catalyzed air purifying powder material and its preparation method and application |
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| 李强，等: "稀土-过渡金属共掺杂TiO2纳米材料：结构和光催化性能", 《化工新型材料》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482191A (en) * | 2018-12-24 | 2019-03-19 | 哈尔滨商业大学 | A kind of foamed nickel supported zinc titanate/tourmaline catalysis material and preparation method thereof |
| CN109482191B (en) * | 2018-12-24 | 2020-12-08 | 哈尔滨商业大学 | Foamed nickel loaded zinc titanate/tourmaline photocatalytic material and preparation method thereof |
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