CN109772384A - A kind of hydroxy phosphorus Calx load platinum catalyst and preparation method thereof - Google Patents
A kind of hydroxy phosphorus Calx load platinum catalyst and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of hydroxy phosphorus Calx load platinum catalysts and preparation method thereof, which comprises is dispersed in water hydroxy phosphorus Calx or the hydroxy phosphorus Calx of modification, obtains dispersion liquid；A small amount of platinum presoma is added into the dispersion liquid, obtains mixed liquor；The reducing agent for restoring the platinum presoma is added into the mixed liquor, obtains mixture；The mixture is purified, the composite catalyst for being 0.2~0.4wt% containing Pt mass accounting is obtained.It is nontoxic carbon dioxide and water that formaldehyde, which can be effectively catalytically decomposed, in the composite catalyst at room temperature.
Description
Technical field
The present invention relates to indoor air purification fields；In particular it relates to a kind of hydroxy phosphorus Calx load platinum catalyst and its
Preparation method.
Background technique
Formaldehyde is typical indoor air pollutants, can stimulate eyes and throat, leads to human skin itch etc., if long
Phase contact, can be carcinogenic or even dead.Formaldehyde Pollution of Indoor Air is effectively removed, ensures that human health is of great significance.
Currently, room temperature removes carbaldehyde Method due to that formaldehyde exhaustive oxidation can be made at titanium dioxide without additional energy and device
Carbon and water cause the broad interest of research worker.Designing and preparing for effective catalyst is the key that room temperature removal formaldehyde
Factor.Efficient room temperature removal formaldehyde catalyst is mainly carried noble metal composite catalyst at present.It is sent out in numerous research
Existing, the person's character of carrier, micro-structure and surface hydroxyl etc. have great influence to carried noble metal type catalyst.The load studied
Body has metal oxide such as TiO2、MnO2、CeO2And some composite oxides, hydroxide such as hydrated iron and nonmetallic oxygen
Compound such as SiO2Deng, these active carriers, there are the disadvantages such as the expensive or compatibility with environment of raw material sources is not so good.After
It is continuous to seek efficient, cheap and environmental-friendly carrier still there is highly important research significance.
Summary of the invention
The purpose of the invention is to overcome the defect of above-mentioned carrier of the existing technology, a kind of hydroxy phosphorus Calx is provided
Hydroxy phosphorus Calx is selected as the carrier of room temperature catalytic decomposition formaldehyde composite catalyst by load platinum catalyst and preparation method thereof,
And low content Pt is loaded, to reduce catalyst cost, there is obtained composite catalyst excellent room temperature to remove formaldehyde activity, from
And achieve the purpose that remove formaldehyde.
To achieve the goals above, in the embodiment on basis, the present invention provides a kind of hydroxy phosphorus Calx Supported Pt Nanoparticles and urges
Agent, the carrier of the catalyst are hydroxy phosphorus Calx, and activated centre is Pt nano particle, wherein the matter of Pt in the catalyst
Measuring accounting is 0.2~0.4%.
Another aspect of the present invention provides the preparation method of above-mentioned hydroxy phosphorus Calx load platinum catalyst, including walks as follows
It is rapid:
(1) hydroxy phosphorus Calx is dispersed in water, obtains dispersion liquid；
(2) platinum presoma is added in Xiang Suoshu dispersion liquid, obtains mixed liquor；
(3) reducing agent for restoring the platinum presoma is added in Xiang Suoshu mixed liquor, obtains mixture；
(4) mixture is purified, obtains being that the described of 0.2wt%~0.4wt% compound is urged containing Pt mass accounting
Agent.
In a preferred embodiment, the platinum presoma is chloroplatinic acid, and the platinum element in the chloroplatinic acid accounts for institute
State the mass percent 0.2~0.4% of composite catalyst.
In a preferred embodiment, the reducing agent is sodium borohydride and sodium hydroxide mixture.
In a preferred embodiment, after hydroxy phosphorus Calx being dispersed in water, magnetic agitation 0.2h-0.3h is obtained
To dispersion liquid.
In a preferred embodiment, the platinum presoma is impregnated into 0.25h~0.5h in the dispersion liquid, obtained
The mixed liquor.
In a preferred embodiment, the purification includes: centrifugation and drying.
In a preferred embodiment, the preparation method of the hydroxy phosphorus Calx includes:
Calcium salt is dispersed in water, dispersion liquid I is obtained；
Phosphate is dissolved in lye, solution II is obtained；
After mixing evenly by dispersion liquid I and solution II, the hydro-thermal process at 150 DEG C -200 DEG C, then again will be before acquisition
It drives body to calcine at 600 DEG C -800 DEG C, obtains hydroxy phosphorous stone putty material；
In a preferred embodiment, the preparation method of the hydroxy phosphorus Calx includes:
Calcium salt and modifying agent are dispersed in water, dispersion liquid I is obtained；
Phosphate is dissolved in lye, solution II is obtained；
After mixing evenly by dispersion liquid I and solution II, the hydro-thermal process at 150 DEG C -200 DEG C, then again will be before acquisition
It drives body to calcine at 600 DEG C -800 DEG C, obtains modified hydroxy phosphorous stone putty material.
In a preferred embodiment, the calcium salt is selected from calcium nitrate, calcium acetate and calcium chloride；The phosphate choosing
From disodium hydrogen phosphate, tertiary sodium phosphate and dipotassium hydrogen phosphate；The lye is selected from NaOH solution, KOH solution and KOH, NaOH's
Mixture solution.
In a preferred embodiment, the modifying agent is selected from sodium citrate and hexamethylenetetramine.
In a preferred embodiment, the calcium salt and phosphatic molar ratio are 4-5:1.
In a preferred embodiment, the weight ratio of the modifying agent and calcium salt is 1:45-50.
In a preferred embodiment, in the calcination process, heating rate is 3-8 DEG C/min.
Through the above technical solutions, preparation method of the present invention utilizes the advantages of hydroxy phosphorus Calx and by regulation hydroxy phosphorous stone
The surface chemical property of grey carrier has designed and prepared load low content of noble metal Pt composite catalyzing material, has made prepared answer
It closes catalyst cost to substantially reduce, and good with environment compatibility, extensive use of the composite catalyst in life can be promoted.This is multiple
Closing catalyst and formaldehyde can effectively be catalytically decomposed at room temperature is nontoxic carbon dioxide and water.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the X-ray diffraction spectrum for the composite catalyst that the embodiment of the present invention one, embodiment two and embodiment three provide
Figure；
Fig. 2 is the scanning electron microscope spectrogram for the composite catalyst that the embodiment of the present invention one provides；
Fig. 3 is the scanning electron microscope spectrogram of composite catalyst provided by Embodiment 2 of the present invention；
Fig. 4 is the scanning electron microscope spectrogram for the composite catalyst that the embodiment of the present invention three provides；
Fig. 5 is the X-ray energy spectrogram of composite catalyst provided by Embodiment 2 of the present invention；
Fig. 6 a-6b is that the composite catalyst that the embodiment of the present invention one, embodiment two and embodiment three provide is urged at room temperature
Changing formaldehyde during aoxidizing formaldehyde reduces the comparative result figure of (6a) and carbon dioxide raising (6b).
Specific embodiment
In order to better understand the above technical scheme, being done below by specific embodiment to technical scheme detailed
Explanation, it should be understood that the specific features in the embodiment of the present application and embodiment be to technical scheme specifically
It is bright, rather than the restriction to technical scheme, in the absence of conflict, the skill in the embodiment of the present application and embodiment
Art feature can be combined with each other.It should be understood that term "and/or" used herein above includes listed by one of them or more
Any and all combinations of associated item out.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
For the defect of above-mentioned carrier of the existing technology, since hydroxy phosphorus Calx has good chemical stability,
Bio-compatibility and activity.The embodiment of the present invention utilizes these above-mentioned advantages of hydroxy phosphorus Calx and its surface rich in
The characteristics such as hydroxyl are chosen as the carrier of room temperature catalytic decomposition formaldehyde composite catalyst.
The main thought of the embodiment of the present invention is: a kind of hydroxy phosphorus Calx load platinum catalyst, the composite catalyst
Carrier is hydroxy phosphorus Calx, and activated centre is Pt nano particle, wherein quality accounting of the Pt in composite catalyst be 0.2~
0.4%.
The preparation method of above-mentioned hydroxy phosphorus Calx load platinum catalyst, includes the following steps:
(1) hydroxy phosphorus Calx is dispersed in water, obtains dispersion liquid；
(2) platinum presoma is added in Xiang Suoshu dispersion liquid, obtains mixed liquor；
(3) reducing agent for restoring the platinum presoma is added in Xiang Suoshu mixed liquor, obtains mixture；
(4) mixture is purified, obtains the composite catalyst for being 0.2~0.4wt% containing Pt mass ratio.
There is above-mentioned hydroxy phosphorus Calx load platinum composite catalyst excellent room temperature to remove formaldehyde activity；In addition, hydroxyl
Modifier modification preparation can be used in phosphorus lime, and the hydroxy phosphorus Calx after modifier modification is added does not load platinum composite catalyst, and not
Modified hydroxyl phosphorus lime load platinum composite catalyst is compared, and activity is remarkably reinforced.
Below with reference to specific embodiment, the present invention will be described in detail.Material used in embodiment can be by commercially available
Channel obtains.
Embodiment one
4.78g four water-calcium nitrate is dissolved in the water of 100mL, solution I is obtained, by 1.58g disodium hydrogen phosphate
It is dissolved in the 2mol/L NaOH solution of 40mL, obtains solution II.Solution I and solution II are stirred into 8h at 40 DEG C, sufficiently divided
After dissipating, which is transferred in reaction kettle, then the hydro-thermal process 12h at 180 DEG C, presoma solid obtained passes through
After centrifugal drying, 2h (heating rate is 5 DEG C/min) is calcined at 700 DEG C, obtains hydroxy phosphorous stone putty material；
It takes 0.4g phosphorus lime to be distributed in 30mL distilled water, through magnetic agitation 0.25h, obtains dispersion liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.5h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.2% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, Pt/ hydroxy phosphorus Calx composite catalyzing is obtained
Agent.
Embodiment two
4.78g four water-calcium nitrate and 0.1g sodium citrate are dissolved in the water of 100mL, solution I is obtained, by 1.58g ten
Phosphate dihydrate disodium hydrogen is dissolved in the 2mol/L NaOH solution of 40mL, obtains solution II.By solution I and solution II at 40 DEG C
After fully dispersed, which is transferred in reaction kettle by lower stirring 8h, and then the hydro-thermal process 12h at 180 DEG C, is obtained
Presoma solid by after centrifugal drying, calcining 2h (heating rate is 5 DEG C/min) at 700 DEG C, obtain sodium citrate and change
The hydroxy phosphorous stone putty material of property；
The phosphorus lime for taking 0.4g sodium citrate modified is distributed in 30mL distilled water, through magnetic agitation 0.25h, is dispersed
Liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.5h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.2% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, the modified hydroxyl phosphorus of Pt/ sodium citrate is obtained
Lime composite catalyst.
Embodiment three
4.78g four water-calcium nitrate and 0.1g hexamethylenetetramine are dissolved in the water of 100mL, solution I is obtained, it will
1.58g disodium hydrogen phosphate is dissolved in the 2mol/L NaOH solution of 40mL, obtains solution II.By solution I and solution II
8h is stirred at 40 DEG C, after fully dispersed, which is transferred in reaction kettle, then the hydro-thermal process 12h at 180 DEG C,
After presoma solid obtained passes through centrifugal drying, 2h (heating rate is 5 DEG C/min) is calcined at 700 DEG C, is obtained six times
The modified hydroxy phosphorous stone putty material of tetramine；
The phosphorus lime for taking 0.4g sodium citrate modified is distributed in 30mL distilled water, through magnetic agitation 0.25h, is dispersed
Liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.5h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.2% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, the modified hydroxyl of Pt/ hexamethylenetetramine is obtained
Base phosphorus lime composite catalyst.
Example IV
4.78g four water-calcium nitrate is dissolved in the water of 100mL, solution I is obtained, by 1.58g disodium hydrogen phosphate
It is dissolved in the 2mol/L NaOH solution of 40mL, obtains solution II.Solution I and solution II are stirred into 8h at 40 DEG C, sufficiently divided
After dissipating, which is transferred in reaction kettle, then the hydro-thermal process 12h at 180 DEG C, presoma solid obtained passes through
After centrifugal drying, 2h (heating rate is 5 DEG C/min) is calcined at 700 DEG C, obtains phosphorus lime material；
It takes 0.4g phosphorus lime to be distributed in 30mL distilled water, through magnetic agitation 0.25h, obtains dispersion liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.5h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.4% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, Pt/ hydroxy phosphorus Calx composite catalyzing is obtained
Agent.
Embodiment five
4.78g four water-calcium nitrate and 0.1g sodium citrate are dissolved in the water of 100mL, solution I is obtained, by 1.58g ten
Phosphate dihydrate disodium hydrogen is dissolved in the 2mol/L NaOH solution of 40mL, obtains solution II.By solution I and solution II at 40 DEG C
After fully dispersed, which is transferred in reaction kettle by lower stirring 8h, and then the hydro-thermal process 12h at 180 DEG C, is obtained
Presoma solid by after centrifugal drying, calcining 2h (heating rate is 5 DEG C/min) at 700 DEG C, obtain sodium citrate and change
The hydroxy phosphorous stone putty material of property；
The phosphorus lime for taking 0.4g sodium citrate modified is distributed in 30mL distilled water, through magnetic agitation 0.25h, is dispersed
Liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.5h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.4% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, the modified hydroxyl phosphorus of Pt/ sodium citrate is obtained
Lime composite catalyst.
Embodiment six
4.78g four water-calcium nitrate and 0.1g hexamethylenetetramine are dissolved in the water of 100mL, solution I is obtained, it will
1.58g disodium hydrogen phosphate is dissolved in the 2mol/L NaOH solution of 40mL, obtains solution II.By solution I and solution II
8h is stirred at 40 DEG C, after fully dispersed, which is transferred in reaction kettle, then the hydro-thermal process 12h at 180 DEG C,
After presoma solid obtained passes through centrifugal drying, 2h (heating rate is 5 DEG C/min) is calcined at 700 DEG C, is obtained six times
The hydroxy phosphorous stone putty material of tetramine；
The phosphorus lime for taking 0.4g hexamethylenetetramine modified is distributed in 30mL distilled water, through magnetic agitation 0.25h, is obtained
Dispersion liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.5h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.4% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, the modified hydroxyl of Pt/ hexamethylenetetramine is obtained
Base phosphorus lime composite catalyst.
Embodiment seven
3.96g calcium acetate and 0.1g sodium citrate are dissolved in the water of 100mL, solution I is obtained, by 12 water of 1.90g
Tertiary sodium phosphate is dissolved in the 2mol/L KOH solution of 40mL, obtains solution II.Solution I and solution II are stirred at 40 DEG C
After fully dispersed, which is transferred in reaction kettle by 8h, then the hydro-thermal process 15h at 150 DEG C, forerunner obtained
After body solid passes through centrifugal drying, 4h (heating rate is 3 DEG C/min) is calcined at 600 DEG C, obtains the modified hydroxyl of sodium citrate
Base phosphorus lime material；
It takes 0.4g phosphorus lime to be distributed in 30mL distilled water, through magnetic agitation 0.2h, obtains dispersion liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.25h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.3% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, the modified phosphorus lime of Pt/ sodium citrate is obtained
Composite catalyst.
Embodiment eight
2.22g calcium chloride is dissolved in the water of 100mL, solution I is obtained, 1.14g dipotassium hydrogen phosphate trihydrate is dissolved
In KOH, NaOH mixture solution of the 2mol/L of 40mL, solution II is obtained.Solution I and solution II are stirred at 40 DEG C
After fully dispersed, which is transferred in reaction kettle by 8h, then the hydro-thermal process 10h at 200 DEG C, forerunner obtained
After body solid passes through centrifugal drying, 1.5h (heating rate is 8 DEG C/min) is calcined at 800 DEG C, obtains hydroxy phosphorous stone putty material；
The phosphorus lime for taking 0.4g sodium citrate modified is distributed in 30mL distilled water, through magnetic agitation 0.3h, is dispersed
Liquid；
Platinum presoma is added into dispersion liquid, which can be chloroplatinic acid, continue to stir 0.3h, be mixed
Liquid, wherein the platinum element in chloroplatinic acid accounts for the mass percent 0.2% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, Pt/ hydroxy phosphorus Calx composite catalyzing is obtained
Agent.
Comparative example
Take the commercially available P25 (TiO of 0.4g2) be distributed in 30mL distilled water, through magnetic agitation 0.3h, obtain dispersion liquid；
Chloroplatinic acid platinum presoma is added into dispersion liquid, continues to stir 0.25h, obtains mixed liquor, wherein in chloroplatinic acid
Platinum element accounts for the mass percent 0.2% of composite catalyst；
5mLNaBH is added into mixed liquor4Platinum precursor is restored with the mixed solution of NaOH；Continue to stir 0.5h, wherein
NaBH4Concentration with NaOH is 0.1M；
Mixture is centrifuged, is then dried in vacuo at 60 DEG C, obtains Pt/TiO2Composite catalyst.
Embodiment one, embodiment two and the resulting composite catalyst of embodiment three are subjected to X-ray diffraction (X-ray respectively
Diffraction, XRD), scanning electron microscope (Field-emission scanning electron microscopy,
SEM it) analyzes, result difference is as shown in Figures 1 to 4, as shown in Figure 1, prepared by embodiment one, embodiment two and embodiment three
Composite catalyst have typical hydroxy phosphorus Calx phase structure (PDF No.09-0432).Fig. 2,3 and 4 shows prepared hydroxyl
Base phosphorus lime sample forms for nanoparticle aggregate.Fig. 5 is that the EDS of two gained composite catalyst of embodiment schemes, can be with from figure
Find out in gained sample containing Ca, P, O, Pt and Na element, further demonstrates that the modified hydroxy phosphorus Calx of sodium citrate is successfully made
It is standby.Fig. 6 a and 6b are pair that embodiment one, embodiment two and the resulting composite catalyst room temperature of embodiment three remove formaldehyde performance
Than figure.By, it is observed that concentration of formaldehyde constantly reduces, gas concentration lwevel constantly rises in figure, show formaldehyde by thorough oxygen
It is melted into carbon dioxide and water.Embodiment two and the resulting modified hydroxyl phosphorus lime composite catalyst of embodiment three remove formaldehyde performance
It is higher than the resulting composite catalyst of embodiment one.It should be the result shows that can be by sodium citrate and hexamethylenetetramine modification
One step improves Pt/ hydroxy phosphorus Calx composite catalyst activity.
Embodiment one to the resulting composite catalyst of embodiment eight and the resulting composite catalyst of comparative example is existed respectively
Carry out formaldehyde Catalysis experiments at room temperature, specifically, the composite catalyst that takes the embodiment one of 0.1g to prepare into embodiment eight or
The resulting composite catalyst of comparative example is dispersed in the surface plate that diameter is 14cm, the surface plate is then placed in containing for 6L
In the machine glass reactor of one 5W fan.Concentrated formaldehyde solution is injected in the organic glass reactor, to formaldehyde volatilization until
When concentration balance, glass cover is removed, composite catalyst is made to contact with each other with formaldehyde, the concentration variation of formaldehyde passes through multicomponent gas
Analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring.Embodiment one to eight is resulting compound
The activity data that catalyst and the resulting composite catalyst of comparative example are catalyzed formaldehyde at room temperature is shown in Table 1.
Table 1 is the activity of composite catalyst at 15 DEG C
As shown in Table 1, at room temperature, the activity of the resulting composite catalyst catalysis formaldehyde of the embodiment of the present invention one to eight is high
In the resulting composite catalyst of comparative example.
The two multiple PARA FORMALDEHYDE PRILLS(91,95) of resulting composite catalyst of embodiment is carried out to repeat catalysis, activity is as shown in table 2.
Table 2 is the activity that the resulting catalyst of the embodiment of the present invention two is repeatedly catalyzed formaldehyde
As shown in Table 2, the resulting low content of noble metal catalyst of embodiment two is after being repeatedly catalyzed formaldehyde, formaldehyde activity
Constantly decaying, but during follow-on test below, still there is more stable activity.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (10)
1. a kind of hydroxy phosphorus Calx load platinum catalyst, it is characterised in that: the carrier of the catalyst is hydroxy phosphorus Calx, activity
Center is Pt nanoparticle, wherein the quality accounting of platinum in the catalyst is 0.2~0.4%.
2. the preparation method of hydroxy phosphorus Calx load platinum catalyst as described in claim 1, it is characterised in that: including walking as follows
It is rapid:
Hydroxy phosphorus Calx is dispersed in water, dispersion liquid is obtained；
Platinum presoma is added into the dispersion liquid, obtains mixed liquor；
The reducing agent for restoring the platinum presoma is added into the mixed liquor, obtains mixture；
The mixture is purified, the catalyst for being 0.2~0.4wt% containing platinum quality accounting is obtained.
3. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 2, it is characterised in that: the platinum forerunner
Body is chloroplatinic acid, and the platinum element in the chloroplatinic acid accounts for the mass percent 0.2~0.4% of the catalyst.
4. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 2, it is characterised in that: the reducing agent
For sodium borohydride and sodium hydroxide mixture.
5. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 2, it is characterised in that: by hydroxy phosphorous stone
After ash is dispersed in water, 0.2h-0.3h is stirred, dispersion liquid is obtained；
The platinum presoma is impregnated into 0.25~0.5h in the dispersion liquid, obtains the mixed liquor.
6. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 2, it is characterised in that: the hydroxyl phosphorus
The preparation method of lime includes:
Calcium salt is dispersed in water, dispersion liquid I is obtained；
Phosphate is dissolved in lye, solution II is obtained；
After mixing evenly by dispersion liquid I and solution II, the hydro-thermal process at 150 DEG C -200 DEG C, then again by the presoma of acquisition
It is calcined at 600 DEG C -800 DEG C, obtains hydroxy phosphorous stone putty material.
7. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 2, it is characterised in that: the hydroxyl phosphorus
The preparation method of lime includes:
Calcium salt and modifying agent are dispersed in water, dispersion liquid I is obtained；
Phosphate is dissolved in lye, solution II is obtained；
After mixing evenly by dispersion liquid I and solution II, the hydro-thermal process at 150 DEG C -200 DEG C, then again by the presoma of acquisition
It is calcined at 600 DEG C -800 DEG C, obtains modified hydroxy phosphorous stone putty material.
8. the preparation method of hydroxy phosphorus Calx load platinum catalyst described according to claim 6 or 7, it is characterised in that: the calcium
Salt is selected from calcium nitrate, calcium acetate and calcium chloride；The phosphate is selected from disodium hydrogen phosphate, tertiary sodium phosphate and dipotassium hydrogen phosphate；Institute
State the mixture solution that lye is selected from NaOH solution, KOH solution and KOH, NaOH.
9. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 7, it is characterised in that: the modifying agent
Selected from sodium citrate and hexamethylenetetramine.
10. the preparation method of hydroxy phosphorus Calx load platinum catalyst according to claim 7, it is characterised in that: the calcium salt
It is 4-5:1 with phosphatic molar ratio；The weight ratio of the modifying agent and calcium salt is 1:45-50.
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| CN110665531A (en) * | 2019-10-23 | 2020-01-10 | 江汉大学 | Pt/g-C3N4/CeO2Composite photocatalyst and preparation method and application thereof |
| CN110876952A (en) * | 2019-11-13 | 2020-03-13 | 江汉大学 | Pt-loaded BMO @ g-C3N4Composite photocatalyst and preparation method and application thereof |
| CN110918101A (en) * | 2019-12-04 | 2020-03-27 | 江汉大学 | Ultralow-content Pt composite catalyst for catalytic decomposition of formaldehyde gas at room temperature and preparation method thereof |
| CN110975898A (en) * | 2019-11-08 | 2020-04-10 | 江汉大学 | Platinum catalyst loaded on hydroxyapatite composite cobaltosic oxide and preparation method thereof |
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| CN110975898A (en) * | 2019-11-08 | 2020-04-10 | 江汉大学 | Platinum catalyst loaded on hydroxyapatite composite cobaltosic oxide and preparation method thereof |
| CN110876952A (en) * | 2019-11-13 | 2020-03-13 | 江汉大学 | Pt-loaded BMO @ g-C3N4Composite photocatalyst and preparation method and application thereof |
| CN110918101A (en) * | 2019-12-04 | 2020-03-27 | 江汉大学 | Ultralow-content Pt composite catalyst for catalytic decomposition of formaldehyde gas at room temperature and preparation method thereof |
| CN110918101B (en) * | 2019-12-04 | 2022-09-16 | 江汉大学 | Ultralow-content Pt composite catalyst for catalytic decomposition of formaldehyde gas at room temperature and preparation method thereof |
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