CN111495358B - Formaldehyde remover with normal-temperature catalytic activity and preparation method thereof - Google Patents
Formaldehyde remover with normal-temperature catalytic activity and preparation method thereof Download PDFInfo
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 210
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 69
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000000084 colloidal system Substances 0.000 claims abstract description 52
- 239000000243 solution Substances 0.000 claims abstract description 52
- 239000002243 precursor Substances 0.000 claims abstract description 45
- 239000011148 porous material Substances 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 23
- 239000007864 aqueous solution Substances 0.000 claims abstract description 23
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000002808 molecular sieve Substances 0.000 claims description 20
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 239000000741 silica gel Substances 0.000 claims description 13
- 229910002027 silica gel Inorganic materials 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000001354 calcination Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 239000002516 radical scavenger Substances 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 8
- 239000001569 carbon dioxide Substances 0.000 abstract description 7
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 18
- 238000012360 testing method Methods 0.000 description 15
- 238000007254 oxidation reaction Methods 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 7
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- 238000006243 chemical reaction Methods 0.000 description 6
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- 230000010718 Oxidation Activity Effects 0.000 description 4
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- 239000012298 atmosphere Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012700 ceramic precursor Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 239000003344 environmental pollutant Substances 0.000 description 2
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
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- 238000003917 TEM image Methods 0.000 description 1
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- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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Abstract
A formaldehyde remover with normal temperature catalytic activity and a preparation method thereof are disclosed, wherein under the stirring, a glycol solution of sodium hydroxide is added into an aqueous solution of chloroplatinic acid to be mixed to form a precursor solution; heating the precursor solution to obtain Pt colloid; adding the Pt colloid into the porous material, stirring, filtering, washing and drying to obtain a Pt-loaded porous material precursor; and roasting the Pt-loaded porous material precursor to obtain the formaldehyde remover with catalytic activity at normal temperature. The synergistic effect of the porous material and Pt in the formaldehyde remover can ensure that the removal rate of formaldehyde and the selectivity of carbon dioxide are both more than 90% at room temperature, and the complete decomposition of formaldehyde is realized.
Description
Technical Field
The invention relates to a formaldehyde remover and a preparation method thereof, in particular to a formaldehyde remover with normal-temperature catalytic activity and a preparation method thereof, and belongs to the technical field of normal-temperature catalysts.
Background
Formaldehyde is a main indoor volatile pollutant in the present stage of China and is determined as a teratogenic and carcinogenic substance by the world health organization. Therefore, formaldehyde treatment is one of the current research hotspots. Currently, the most common formaldehyde tail end treatment technology is mainly an activated carbon adsorption and absorption technology, but the traditional adsorption and absorption control technology only transfers pollutants from a gas phase to a solid phase, and does not realize removal in a real sense, and an adsorption material has limited adsorption capacity, needs to be regenerated or replaced regularly, and is easy to generate secondary pollution, so that the indoor air quality standard specified by the state is often difficult to achieve in practical application. Different from the traditional adsorption/absorption formaldehyde removal technology, the formaldehyde normal-temperature catalytic oxidation technology starts catalytic reaction by utilizing self-lattice oxygen or activated adsorbed oxygen of a catalyst, realizes harmless treatment of complete decomposition of formaldehyde at room temperature (T is less than or equal to 40 ℃), has the characteristics of high efficiency, environmental protection and the like, and has wide application prospect. However, the catalytic oxidation aldehyde removal technique has a greatest problem in that the reaction rate is relatively slow, and the reaction is incomplete when the residence time of formaldehyde on the surface of the catalytic material is short, compared to the rapid aldehyde removal by the adsorption/absorption technique.
Disclosure of Invention
The invention aims to provide a preparation method of a formaldehyde remover with normal-temperature catalytic activity.
In order to achieve the above object, the present invention adopts the following technical solutions:
a preparation method of a formaldehyde remover with normal-temperature catalytic activity comprises the following steps:
step 1: adding a glycol solution of sodium hydroxide into an aqueous solution of chloroplatinic acid under stirring to form a precursor solution;
step 2: heating the precursor solution obtained in the step 1 to obtain Pt colloid;
and step 3: adding the Pt colloid obtained in the step (2) into a porous material, stirring, filtering, washing and drying to obtain a Pt-loaded porous material precursor;
and 4, step 4: and (4) roasting the Pt-loaded porous material precursor obtained in the step (3) to obtain the formaldehyde remover with catalytic activity at normal temperature.
The invention has the further improvement that in the step 1, the concentration of the glycol solution of the sodium hydroxide is 3-5.5 mg/mL,
the concentration of the chloroplatinic acid aqueous solution is 2.5-5.5 mg/mL,
the volume ratio of the ethylene glycol solution of sodium hydroxide to the chloroplatinic acid aqueous solution is (7-9): 1.
the further improvement of the invention is that in the step 2, the heating temperature is 130-150 ℃ and the time is 0.5-2 h.
The further improvement of the invention is that in the step 3, the porous material is one or more of molecular sieve, alumina, honeycomb ceramic and silica gel.
The invention is further improved in that in the step 3, the stirring time is 6-12 h.
The invention is further improved in that in the step 3, the mass ratio of the Pt colloid to the porous material is (5-10): 1.
The further improvement of the invention is that in the step 4, the roasting temperature is 150-.
A formaldehyde remover with normal-temperature catalytic activity, which is prepared by the method.
Compared with the prior artCompared with the prior art, the invention has the following beneficial effects: according to the invention, water is introduced into the ethylene glycol solution to form the precursor solution, and the precursor solution is insulated in the air to prepare the Pt colloid, so that the operation of insulating the precursor solution and quickly adding the Pt raw material in the preparation of the Pt colloid by a hot injection method is avoided, and the process of protecting the Pt raw material by inert atmosphere or dispersing a protective agent in the traditional Pt colloid preparation process for preventing agglomeration is required, so that the operation steps are simplified, and the yield is improved. The Pt colloid formaldehyde remover is mixed with a porous material and calcined in an air atmosphere to obtain the Pt colloid formaldehyde remover with normal-temperature catalytic activity. The method is favorable for enhancing the binding force of Pt particles and a porous material under the condition of air atmosphere calcination, and activates the Pt colloid formaldehyde remover. Therefore, the synergistic effect of the porous material and Pt in the Pt colloid formaldehyde remover can ensure that the formaldehyde removal rate and the carbon dioxide selectivity are both more than 90% at room temperature, and the complete decomposition of formaldehyde is realized. Based on the characteristics of low indoor formaldehyde concentration, long release period and the like, the invention firstly absorbs formaldehyde by the porous material and then decomposes the formaldehyde into CO by catalytic oxidation of the catalytic material through the combination of the traditional adsorption technology and the normal-temperature catalytic oxidation technology2And H2O, is more beneficial to completely removing formaldehyde, thereby realizing the virtuous circle of indoor air quality.
Drawings
FIG. 1 is a TEM image of a Pt colloid/molecular sieve formaldehyde remover prepared in example 1;
FIG. 2 is a graph showing the removal rate of HCHO at room temperature by the room-temperature catalytically active formaldehyde removers prepared in examples 1-4;
FIG. 3 is a diagram showing CO removal at room temperature from HCHO by the room temperature catalytically active formaldehyde removers prepared in examples 1 to 42And (4) a selectivity graph.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
The invention discloses a preparation method of a Pt colloid formaldehyde remover with normal-temperature catalytic activity, which comprises the following steps: adding a glycol solution of sodium hydroxide into an aqueous solution of chloroplatinic acid under stirring at room temperature, and mixing to form a precursor solution; keeping the temperature of the precursor solution in the air at a certain temperature to obtain Pt colloid; adding Pt colloid with a certain mass ratio into a porous material, stirring, filtering, washing and drying to obtain a Pt-loaded porous material precursor; and roasting the Pt-loaded porous material precursor for 2 hours at a certain temperature to obtain the Pt colloid formaldehyde remover with catalytic activity at normal temperature.
Wherein the concentration of the ethylene glycol solution of the sodium hydroxide is 3-5.5 mg/mL; the concentration of the chloroplatinic acid aqueous solution is 2.5-5.5 mg/mL; the sodium hydroxide in ethylene glycol solution: the volume ratio of the chloroplatinic acid aqueous solution is 9: 1-7: 1; the heat preservation temperature is 130-150 ℃, and the heat preservation time is 0.5-2 h; the porous material is one or more of a molecular sieve, alumina, honeycomb ceramic and silica gel, and the stirring time is 6-12 h; the certain mass ratio is 10: 1-5: 1; the roasting temperature range is 150-300 ℃.
The formaldehyde remover with normal-temperature catalytic activity is applied to the complete catalytic oxidation of formaldehyde at room temperature. And (4) evaluating the formaldehyde removal performance by adopting a filter material online dynamic detection system. Regulating and controlling the concentration of formaldehyde inlet to be 100ppm by a formaldehyde distribution system, controlling the catalytic oxidation reaction of the formaldehyde remover filter material to formaldehyde at room temperature of 25 ℃ by a temperature control reaction system, detecting the concentrations of formaldehyde and carbon dioxide on line in real time by an infrared spectrum gas monitor, and respectively detecting the concentration change of formaldehyde and CO2Evaluation of Formaldehyde removal Rate and CO of Filter Material by amount of production2And (4) selectivity.
Example 1
Step 1: adding a glycol solution (3mg/mL, 112mL) of sodium hydroxide into a chloroplatinic acid aqueous solution (2.5mg/mL, 16mL) to form a precursor solution under stirring at room temperature;
step 2: preserving the heat of the precursor solution obtained in the step 1 in the air at 130 ℃ for 2h to obtain a Pt colloid;
and step 3: adding 5mL of the Pt colloid obtained in the step 2 into 1g of molecular sieve, stirring for 6h, filtering, washing and drying to obtain a Pt-loaded molecular sieve precursor;
and 4, step 4: and (4) roasting the Pt-loaded molecular sieve precursor obtained in the step (3) at 260 ℃ for 2h to obtain the Pt colloidal catalyst with normal-temperature catalytic activity.
TEM tests were performed on the Pt colloid/molecular sieve catalyst as shown in figure 1.
As can be seen from FIG. 1, the Pt particles are about 2 to 3nm and are uniformly dispersed on the surface of the substrate.
HCHO normal temperature catalytic oxidation activity test is respectively carried out on the molecular sieve and the Pt colloid/molecular sieve catalyst, and a blank system, namely a catalyst-free system, is used as background elimination:
FIG. 2 is a diagram of the normal temperature removal rate of HCHO by molecular sieve and Pt colloid/molecular sieve catalysts. As can be seen from FIG. 2, the prepared Pt colloid/molecular sieve catalyst shows good removal performance on HCHO, and the formaldehyde removal rate can reach 96% after 1 hour of test; and the formaldehyde removal performance of the pure molecular sieve is lower, namely only 40%.
FIG. 3 shows the CO removal of HCHO at normal temperature by molecular sieve, Pt colloid/molecular sieve catalyst2Generating the graph. As can be seen from FIG. 3, the prepared Pt colloid/molecular sieve catalyst shows very good CO performance on HCHO2Conversion Performance, CO after 1 hour of testing2The selectivity is greater than 90%.
Example 2
Step 1: adding a glycol solution (3.8mg/mL, 120mL) of sodium hydroxide into a chloroplatinic acid aqueous solution (3.5mg/mL, 16mL) to form a precursor solution under stirring at room temperature;
step 2: preserving the heat of the precursor solution obtained in the step (1) in the air at 140 ℃ for 1h to obtain a Pt colloid;
and step 3: adding 6.8mL of the Pt colloid obtained in the step 2 into 1g of alumina, stirring for 8h, filtering, washing and drying to obtain a Pt-loaded alumina precursor;
and 4, step 4: and (4) roasting the Pt-loaded alumina precursor obtained in the step (3) at 220 ℃ for 2h to obtain the Pt colloidal catalyst with normal-temperature catalytic activity.
The HCHO normal temperature catalytic oxidation activity test was carried out on alumina and Pt colloid/alumina catalysts in the same manner as used in example 1. The test results are shown in FIGS. 2 to 3. The result shows that the prepared Pt colloid/alumina catalyst has good removal performance on HCHO, the formaldehyde removal rate can reach 97% after 1 hour of test, and the carbon dioxide selectivity reaches 93%; while the formaldehyde removal rate of alumina is only-19%.
Example 3
Step 1: adding a glycol solution (4mg/mL, 130mL) of sodium hydroxide into a glycol solution (32mL) of a chloroplatinic acid aqueous solution (4.3mg/mL, 8mL) to form a precursor solution under stirring at room temperature;
step 2: preserving the heat of the precursor solution obtained in the step (1) in the air at 150 ℃ for 1h to obtain a Pt colloid;
and step 3: adding 8.1mL of the Pt colloid obtained in the step 2 into 1g of honeycomb ceramic, stirring for 11.3h, filtering, washing, and drying at 80 ℃ to obtain a Pt-loaded honeycomb ceramic precursor;
and 4, step 4: and (4) roasting the Pt-loaded honeycomb ceramic precursor obtained in the step (3) at 300 ℃ for 2h to obtain the Pt colloidal catalyst with normal-temperature catalytic activity.
The HCHO normal temperature catalytic oxidation activity test was performed on the honeycomb ceramic and Pt colloid/honeycomb ceramic catalysts in the same manner as used in example 1. The test results are shown in FIGS. 2 to 3. The result shows that the prepared Pt colloid/honeycomb ceramic catalyst has good removal performance on HCHO, the formaldehyde removal rate is more than 90% after 1 hour of test, and about 93% of the removed formaldehyde is converted into carbon dioxide; the formaldehyde removal performance of the honeycomb ceramic is low, and the removal rate is only 23 percent after 1 hour of test.
Example 4
Step 1: adding a glycol solution (5.5mg/mL, 144mL) of sodium hydroxide into a chloroplatinic acid aqueous solution (5.5mg/mL, 16mL) to form a precursor solution under stirring at room temperature;
step 2: preserving the heat of the precursor solution obtained in the step (1) in the air at 150 ℃ for 0.5h to obtain a Pt colloid;
and step 3: adding 10mL of the Pt colloid obtained in the step 2 into 1g of silica gel, stirring for 12h, filtering, washing and drying to obtain a Pt-loaded silica gel precursor;
and 4, step 4: and (4) roasting the Pt-loaded silica gel precursor obtained in the step (3) at 150 ℃ for 2h to obtain the Pt colloidal catalyst with normal-temperature catalytic activity.
The HCHO normal temperature catalytic oxidation activity test was carried out on silica gel and Pt colloid/silica gel catalysts in the same manner as used in example 1. The test results are shown in FIGS. 2 to 3. The result shows that the prepared Pt colloid/silica gel catalyst has good removal performance on HCHO, the formaldehyde removal rate is more than 90% and the carbon dioxide selectivity is more than 90% after 1 hour of test; the formaldehyde removal performance of the silica gel is low, and the removal rate is reduced to 10 percent after 20 minutes of test.
As can be seen from fig. 2 and fig. 3, the porous material without supporting Pt colloid has a certain absorption and removal effect on formaldehyde, but does not have the ability to catalytically mineralize formaldehyde to achieve complete conversion; according to the embodiment provided by the invention, after the porous material loaded with the Pt colloid is tested for 1 hour, the conversion rates of formaldehyde at normal temperature are all more than 90%, the stable trend is kept, and the selectivity of carbon dioxide is also more than 90%.
Therefore, the Pt colloid formaldehyde remover obtained by the invention greatly improves the formaldehyde removing effect by crosslinking the traditional absorption technology and the catalytic oxidation technology, and realizes the complete mineralization of formaldehyde at normal temperature.
Example 5
Step 1: adding a glycol solution of sodium hydroxide into an aqueous solution of chloroplatinic acid under stirring to form a precursor solution; wherein the concentration of the ethylene glycol solution of sodium hydroxide is 3mg/mL, the concentration of the chloroplatinic acid aqueous solution is 3.5mg/mL, and the volume ratio of the ethylene glycol solution of sodium hydroxide to the chloroplatinic acid aqueous solution is 7: 1.
step 2: heating the precursor solution obtained in the step 1 at 150 ℃ for 0.5h to obtain a Pt colloid;
and step 3: adding the Pt colloid obtained in the step (2) into a porous material, stirring for 6h, filtering, washing and drying to obtain a Pt-loaded porous material precursor; wherein, the porous material is one or more of molecular sieve, alumina, honeycomb ceramics and silica gel. The mass ratio of the Pt colloid to the porous material is 10: 1.
And 4, step 4: and (4) roasting the Pt-loaded porous material precursor obtained in the step (3) at 150 ℃ for 2h to obtain the formaldehyde remover with catalytic activity at normal temperature.
Example 6
Step 1: adding a glycol solution of sodium hydroxide into an aqueous solution of chloroplatinic acid under stirring to form a precursor solution; wherein the concentration of the ethylene glycol solution of sodium hydroxide is 5.5mg/mL, the concentration of the chloroplatinic acid aqueous solution is 2.5mg/mL, and the volume ratio of the ethylene glycol solution of sodium hydroxide to the chloroplatinic acid aqueous solution is 8: 1.
step 2: heating the precursor solution obtained in the step 1 at 140 ℃ for 1h to obtain Pt colloid;
and step 3: adding the Pt colloid obtained in the step (2) into a porous material, stirring for 10h, filtering, washing and drying to obtain a Pt-loaded porous material precursor; wherein, the porous material is one or more of molecular sieve, alumina, honeycomb ceramics and silica gel. The mass ratio of the Pt colloid to the porous material is 7: 1.
And 4, step 4: and (4) roasting the Pt-loaded porous material precursor obtained in the step (3) at the temperature of 200 ℃ for 2h to obtain the formaldehyde remover with normal-temperature catalytic activity.
Example 7
Step 1: adding a glycol solution of sodium hydroxide into an aqueous solution of chloroplatinic acid under stirring to form a precursor solution; wherein the concentration of the ethylene glycol solution of sodium hydroxide is 4mg/mL, the concentration of the chloroplatinic acid aqueous solution is 5.5mg/mL, and the volume ratio of the ethylene glycol solution of sodium hydroxide to the chloroplatinic acid aqueous solution is 9: 1.
step 2: heating the precursor solution obtained in the step 1 at 130 ℃ for 2h to obtain Pt colloid;
and step 3: adding the Pt colloid obtained in the step (2) into a porous material, stirring for 12h, filtering, washing and drying to obtain a Pt-loaded porous material precursor; wherein, the porous material is one or more of molecular sieve, alumina, honeycomb ceramics and silica gel. The mass ratio of the Pt colloid to the porous material is 5: 1.
And 4, step 4: and (4) roasting the Pt-loaded porous material precursor obtained in the step (3) at 300 ℃ for 2h to obtain the formaldehyde remover with normal-temperature catalytic activity.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the protection scope of the present invention.
Claims (6)
1. A preparation method of a formaldehyde remover with normal-temperature catalytic activity is characterized by comprising the following steps:
step 1: adding a glycol solution of sodium hydroxide into an aqueous solution of chloroplatinic acid under stirring to form a precursor solution; wherein the concentration of the ethylene glycol solution of sodium hydroxide is 3-5.5 mg/mL, the concentration of the chloroplatinic acid aqueous solution is 2.5-5.5 mg/mL, and the volume ratio of the ethylene glycol solution of sodium hydroxide to the chloroplatinic acid aqueous solution is (7-9): 1;
step 2: heating the precursor solution obtained in the step 1 to obtain Pt colloid;
and step 3: adding the Pt colloid obtained in the step (2) into the porous material, stirring for 6-12h, filtering, washing and drying to obtain a Pt-loaded porous material precursor;
and 4, step 4: and (4) roasting the Pt-loaded porous material precursor obtained in the step (3) to obtain the formaldehyde remover with catalytic activity at normal temperature.
2. The method as claimed in claim 1, wherein the heating temperature in step 2 is 130-150 ℃ and the time is 0.5-2 h.
3. The method for preparing the formaldehyde remover with normal-temperature catalytic activity according to claim 1, wherein in the step 3, the porous material is one or more of molecular sieve, alumina, honeycomb ceramic and silica gel.
4. The preparation method of the formaldehyde remover with catalytic activity at normal temperature according to claim 1, wherein in the step 3, the mass ratio of Pt colloid to porous material is (5-10): 1.
5. The method as claimed in claim 1, wherein the calcination temperature in step 4 is 150-300 ℃ and the calcination time is 2 h.
6. An ambient catalytically active formaldehyde scavenger prepared by the process of any one of claims 1 to 5.
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| CN106391007B (en) * | 2016-09-12 | 2019-03-22 | 吉林大学 | It is a kind of for catalytic removal carbon monoxide and the catalyst of formaldehyde and preparation method thereof under the conditions of ambient temperature and moisture |
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| JPH07100380A (en) * | 1993-03-25 | 1995-04-18 | Yukong Ltd | Production of catalyst body for removing particulate substance from diesel vehicle and removal of said particulate substance using said catalyst body |
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| CN103848708A (en) * | 2014-03-21 | 2014-06-11 | 青岛科技大学 | Method for preparing cyclohexane through catalytic dechlorination on chlorobenzene and preparation method of catalyst used in method |
| CN106391007B (en) * | 2016-09-12 | 2019-03-22 | 吉林大学 | It is a kind of for catalytic removal carbon monoxide and the catalyst of formaldehyde and preparation method thereof under the conditions of ambient temperature and moisture |
| CN109794160A (en) * | 2017-11-16 | 2019-05-24 | 浙江盾安人工环境股份有限公司 | A kind of catalyst and preparation method thereof for decomposing formaldehyde |
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