CN103977811B - A kind of preparation method of the catalysis material utilizing LED light source degraded air pollutants - Google Patents
A kind of preparation method of the catalysis material utilizing LED light source degraded air pollutants Download PDFInfo
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Abstract
The invention discloses the preparation method of a kind of catalysis material utilizing LED light source degraded air pollutants, the method is by tourmaline micropowder, mischmetal rare earth oxide or nitrate, one or more mixing and doping modified load catalysis materials in foam metal of magnesium-yttrium-transition metal compound, obtains photocatalysis film through uniform temperature sintering certain time；It is assembled into photocatalytic degradation air pollutants module with specific wavelength light emitting diode (LED) planar light source.The advantages such as the present invention is simple, equipment and materials is few, expense is low.Through test, using products obtained therefrom of the present invention can efficiently remove air pollutants, the cycle of removing is short, and wherein formaldehyde clearance reaches 97.6%, can be widely applied to poison and cleaning harmful gas field, has boundless application prospect.
Description
Technical field
The present invention relates to toxic and harmful and administer field, the preparation method of a kind of catalysis material utilizing LED light source degraded air pollutants.
Background technology
Room air pollution has become the outstanding problem jeopardizing human health safety.China Beijing, Shanghai, big city, Tianjin three formaldehyde in indoor air exceeding standard rate are respectively 79%, 82%, 81%, and have even exceeds standard tens times.Room air pollution produces harmful effect, or carcinogenic, mutagenesis to systems such as nerve, immunity, endocrine, reproductions.According to statistics, the disease of the mankind 68% is caused by air pollution, and air pollution 4,000,000 person/year is died from the whole world, and wherein, China is 11.1 ten thousand person/year, and therefore, room air pollution has been classified as one of the most dangerous factor by the World Health Organization (WHO).Wherein, formaldehyde is one of typical pollutant of room air pollution, and concentration is high, harm is big.
Photocatalysis oxidation technique is owing to can be decomposed into CO by indoor air pollutants at normal temperatures and pressures2、H2O, inorganic substances etc., have course of reaction rapidly and efficiently, the feature such as non-secondary pollution, wherein, TiO2Due to have higher oxidation activity, stable to light, nontoxic, inexpensive, invest the advantage such as low and become a kind of catalysis material important, that have application prospect.But, current TiO2Photocatalysis technology is with uviol lamp as light source, with high costs, limits its industrial applications, although can applied solar energy as light source, but TiO2Only with the ultraviolet portion of 5% in solar energy, efficiency is the lowest, and light source has become TiO2The biggest obstacle of photocatalysis technology industrial applications.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of catalysis material that can utilize LED light source degraded air pollutants, by rare earth, magnesium-yttrium-transition metal, tourmaline etc. to TiO2The composite doping modification of catalysis material, can utilize have stabilized intensity, volume is little, luminous voltage is low, the light emitting diode (LED) of life-span length, the advantage such as safe and efficient as light source efficient degradation air pollutants, the method also has simple, low cost and other advantages.
The technical scheme realizing the object of the invention is:
The preparation method of a kind of catalysis material utilizing LED light source degraded air pollutants, comprises the following steps:
(1) a certain amount of tourmaline micropowder is added in dehydrated alcohol, under being stirred continuously effect, add butyl titanate, acetylacetone,2,4-pentanedione, continue to be mixing uniformly to form solution A；
(2) take a certain amount of rare earth to mix with dehydrated alcohol, after stirring, sequentially add distilled water, glacial acetic acid formation B solution；
(3) a certain amount of magnesium-yttrium-transition metal is mixed with dehydrated alcohol, after stirring, sequentially add distilled water, glacial acetic acid formation C solution；
(4) under being stirred continuously effect, B solution is added dropwise in solution A, continues stirring and make its mix homogeneously；
(5) under being stirred continuously effect, C solution is added dropwise in the mixed solution that step (4) obtains, continues stirring 0.2 ~ 8h, be then aged 0.2 ~ 100h and form stable colloidal sol；
(6) being placed in by ready foam metal in the colloidal sol that step (5) obtains, dip time is 0.1 ~ 5h；
(7) use lifting plated film instrument at the uniform velocity to lift with the speed of 0.1 ~ 20cm/min, dry at a temperature of 50 ~ 180 DEG C in being placed in baking oven；
(8) by step (6) ~ (7) repeatable operation 1 ~ 10 time；
(9) sintering certain time i.e. can obtain the photocatalysis film being carried on foam metal at a set temperature；
(10) light emitting diode (LED) taking the certain wavelength of some is assembled into planar light source, and separated by a distance with photocatalysis film, i.e. can obtain the photocatalysis module of degraded air pollutants.
The granularity of step (1) described tourmaline micropowder is 2000 ~ 9000 mesh, and its doping is 0.01 ~ 8 wt%.
Step (2) described rare earth is mischmetal, or the oxide of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium or nitrate is two or more, is mixed by identical weight ratio, and its doping is 0.01 ~ 9.6 wt%.
Step (3) described magnesium-yttrium-transition metal be nitric hydrate chromium, nitric hydrate copper, Ammonium Molybdate Tetrahydrate, Ferrous ammonium sulfate one or more, be mixed by identical weight ratio, its doping is 0.01 ~ 7.8wt%.
Foam metal described in step (6) is nickel foam, foam copper, foamed aluminium, foamed iron, foamed alloy etc., and its aperture is 0.1mm ~ 15mm, through-hole rate >=80%.
Step (9) described sintering temperature is 300 ~ 900 DEG C, sintering time is 0.1 ~ 9h.
Step (10) described light emitting diode wave-length coverage is 365 ~ 395nm, and planar light source is 0.1 ~ 30cm with the distance of photocatalysis film, and intensity of illumination is 0.1 ~ 25mw/cm2。
The positive effect of the present invention is: by rare earth, magnesium-yttrium-transition metal, tourmaline composite doping modification, make catalysis material that stabilized intensity, life-span length, safely and efficiently light emitting diode can be utilized to degrade air pollutants as light source, remove that the 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 applied to poison and cleaning harmful gas field, has boundless application prospect.
Detailed description of the invention
Below in conjunction with embodiment, present invention is further described, but is not limitation of the invention.
Embodiment 1
Being added in 20mL dehydrated alcohol by the tourmaline micropowder that granularity is 3000 mesh, its doping is 0.2 wt%, under being stirred continuously effect, adds 10mL butyl titanate, 1mL acetylacetone,2,4-pentanedione, is mixing uniformly to form solution A；0.8 wt% Lanthanum (III) nitrate is mixed with 20mL dehydrated alcohol, uniformly after sequentially add 2mL distilled water, 2.5mL glacial acetic acid forms B solution；The nitric hydrate chromium of 0.5 wt% is mixed with 20mL dehydrated alcohol, uniformly after sequentially add 2mL distilled water, 2.5mL glacial acetic acid forms C solution；Under being stirred continuously effect, B solution is added dropwise in solution A so that it is mix homogeneously, then is added dropwise over C solution, continue stirring 0.5h, ageing 20h and form stable colloidal sol；The nickel foam being cut into a size of 145mm × 80mm is placed in colloidal sol dipping 0.2h；Use lifting plated film instrument at the uniform velocity to lift with the speed of 2cm/min, put into baking oven in 120 DEG C of drying；Impregnate, lift, dry repeatable operation 2 times；The photocatalysis film that 2h i.e. can obtain being carried on foam metal is sintered at a temperature of 400 DEG C；Taking the light emitting diode (LED) that wavelength is 375nm 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/cm2。
Drawing through 3 parallel tests, the formaldehyde clearance of photocatalysis film is 87.6%.
Embodiment 2
Being added in 20mL dehydrated alcohol by the tourmaline micropowder that granularity is 4000 mesh, its doping is 0.4 wt%, under being stirred continuously effect, adds 10mL butyl titanate, 1mL acetylacetone,2,4-pentanedione, is mixing uniformly to form solution A；1.0 wt% Lanthanum (III) nitrates, cerous nitrate mixture (weight ratio is 1:1) are mixed with 20mL dehydrated alcohol, uniformly after sequentially add 2mL distilled water, 2.5mL glacial acetic acid forms B solution；The nitric hydrate chromium of 0.7 wt%, nitric hydrate copper (1:1) mixture are mixed with 20mL dehydrated alcohol, uniformly after sequentially add 2mL distilled water, 2.5mL glacial acetic acid forms C solution；Under being stirred continuously effect, B solution is added dropwise in solution A so that it is mix homogeneously, then is added dropwise over C solution, continue stirring 1h, ageing 20h and form stable colloidal sol；The foam copper being cut into a size of 145mm × 80mm is placed in colloidal sol dipping 0.3h；Use lifting plated film instrument at the uniform velocity to lift with the speed of 1.5cm/min, put into baking oven in 120 DEG C of drying；Impregnate, lift, dry repeatable operation 3 times；The photocatalysis film that 1.5h i.e. can obtain being carried on foam metal is sintered at a temperature of 500 DEG C；Taking the light emitting diode (LED) that wavelength is 385nm 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/cm2。
Drawing through 3 parallel tests, the formaldehyde clearance of photocatalysis film is 91.6%.
Embodiment 3
Being added in 20mL dehydrated alcohol by the tourmaline micropowder that granularity is 5000 mesh, its doping is 0.6 wt%, under being stirred continuously effect, adds 10mL butyl titanate, 1mL acetylacetone,2,4-pentanedione, is mixing uniformly to form solution A；1.2 wt% Lanthanum (III) nitrates, neodymium nitrate mixture (weight ratio is 1:1) are mixed with 20mL dehydrated alcohol, uniformly after sequentially add 2mL distilled water, 2.5mL glacial acetic acid forms B solution；The nitric hydrate chromium of 0.9 wt%, Ammonium Molybdate Tetrahydrate (1:1) mixture are mixed with 20mL dehydrated alcohol, uniformly after sequentially add 2mL distilled water, 2.5mL glacial acetic acid forms C solution；Under being stirred continuously effect, B solution is added dropwise in solution A so that it is mix homogeneously, then is added dropwise over C solution, continue stirring 2h, ageing 24h and form stable colloidal sol；The nickel foam being cut into a size of 145mm × 80mm is placed in colloidal sol dipping 0.5h；Use lifting plated film instrument at the uniform velocity to lift with the speed of 1cm/min, put into baking oven in 180 DEG C of drying；Impregnate, lift, dry repeatable operation 4 times；The photocatalysis film that 1h i.e. can obtain being carried on foam metal is sintered at a temperature of 600 DEG C；Taking the light emitting diode (LED) that wavelength is 395nm 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/cm2。
Drawing through 3 parallel tests, the formaldehyde clearance of photocatalysis film is 97.6%.
Claims (8)
1. utilize a preparation method for the catalysis material of LED light source degraded air pollutants, it is characterized in that: comprise the following steps:
(1) a certain amount of tourmaline micropowder is added in dehydrated alcohol, under being stirred continuously effect, add butyl titanate, acetylacetone,2,4-pentanedione, continue to be mixing uniformly to form solution A；
(2) take a certain amount of rare earth to mix with dehydrated alcohol, after stirring, sequentially add distilled water, glacial acetic acid formation B solution；
(3) a certain amount of magnesium-yttrium-transition metal is mixed with dehydrated alcohol, after stirring, sequentially add distilled water, glacial acetic acid formation C solution；
(4) under being stirred continuously effect, B solution is added dropwise in solution A, continues stirring and make its mix homogeneously；
(5) under being stirred continuously effect, C solution is added dropwise in the mixed solution that step (4) obtains, continues stirring 0.2 ~ 8h, be then aged 0.2 ~ 100h and form stable colloidal sol；
(6) being placed in by ready foam metal in the colloidal sol that step (5) obtains, dip time is 0.1 ~ 5h；
(7) use lifting plated film instrument at the uniform velocity to lift with the speed of 0.1 ~ 20cm/min, dry at a temperature of 50 ~ 180 DEG C in being placed in baking oven；
(8) by step (6) ~ (7) repeatable operation 1 ~ 10 time；
(9) sintering certain time i.e. can obtain the photocatalysis film being carried on foam metal at a set temperature；
(10) light emitting diode (LED) taking the certain wavelength of some is assembled into planar light source, and separated by a distance with photocatalysis film, i.e. can obtain the photocatalysis module of degraded air pollutants；
The granularity of described tourmaline micropowder is 2000 ~ 9000 mesh；
Described rare earth is mischmetal, or the oxide of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium or nitrate is two or more, is mixed by identical weight ratio；
Described magnesium-yttrium-transition metal be nitric hydrate chromium, nitric hydrate copper, Ammonium Molybdate Tetrahydrate, Ferrous ammonium sulfate one or more, be mixed by identical weight ratio；
Described foam metal is nickel foam, foam copper, foamed aluminium, foamed iron, foamed alloy.
Preparation method the most according to claim 1, is characterized in that: the doping of step (1) described tourmaline micropowder is 0.01 ~ 8 wt%.
Preparation method the most according to claim 1, is characterized in that: the described rear-earth-doped amount of step (2) is 0.01 ~ 9.6 wt%.
Preparation method the most according to claim 1, is characterized in that: the doping of step (3) described magnesium-yttrium-transition metal is 0.01 ~ 7.8 wt%.
Preparation method the most according to claim 1, is characterized in that: the aperture of the foam described in step (6) is 0.1mm ~ 15mm, through-hole rate >=80%.
Preparation method the most according to claim 1, is characterized in that: step (9) described sintering temperature is 300 ~ 900 DEG C, sintering time is 0.1 ~ 9h.
Preparation method the most according to claim 1, is characterized in that: step (10) described light emitting diode wave-length coverage is 365 ~ 395nm, and planar light source is 0.1 ~ 30cm with the distance of photocatalysis film, and intensity of illumination is 0.1 ~ 25mw/cm2。
8. the catalysis material utilizing LED light source degraded air pollutants prepared by the preparation method one of claim 1-7 Suo Shu.
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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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| 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 |
Non-Patent Citations (3)
| Title |
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| 电气石/La/TiO2光催化材料的合成与表征;赵永明，等;《化工新型材料》;20120630;第40卷(第6期);第69页右栏第2-3段、第70页左栏第1-2段、图1及表1 * |
| 电气石复合Nd/TiO2材料光催化活性研究;袁昌来，等;《矿物学报》;20060630;第26卷(第2期);全文 * |
| 稀土-过渡金属共掺杂TiO2纳米材料：结构和光催化性能;李强，等;《化工新型材料》;20100131;第38卷(第1期);全文 * |
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