CN107159262B - Room temperature removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst - Google Patents
Room temperature removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst Download PDFInfo
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Abstract
The invention discloses a kind of room temperatures to remove formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst, copper salt solution and GO solution are mixed and to form solution A；Palladium salt solution, solvable alkali and reducing solution are sequentially added in solution A, form B solution；C solution is obtained after B solution is carried out hydro-thermal reaction, the solid in C solution obtains Pd/Cu through centrifuge washing, drying, grindingxO@GO composite catalyst.Using one step hydro thermal method by Pd in-situ deposition in CuxOn O@GO carrier, be conducive to close contact of each component on nanoscale, enhance Pd/CuxThe reactivity of O@GO composite catalyst, without high-temperature calcination or roasting, step is few, it is easy to operate, the upper Surface oxygen-containing groups abundant of GO can improve the absorption property of catalyst PARA FORMALDEHYDE PRILLS(91,95), the further oxidation for being conducive to oxidation of formaldehyde intermediate product converts the formaldehyde of high concentration comparatively fast within a short period of time and decomposes, and concentration quickly reduces.
Description
Technical field
The invention belongs to nanocatalyst preparation technical field, specifically a kind of room temperature removes formaldehyde gas Pd/CuxO@
The preparation method of GO composite catalyst.
Background technique
Indoor concentration of formaldehyde is high after house decoration, and harm to the human body is serious.The method of existing removal formaldehyde has physics
Absorption method, chemiadsorption, photocatalytic degradation method and plasma method etc., room temperature catalytic oxidation method are not necessarily to extra means and energy
Carbon dioxide and water can be oxidized the formaldehyde into, environmental protection and energy saving are high-efficient.Effective catalyst is then in room temperature catalytic oxidation method
New and effective carried noble metal catalysis can be made by changing carrier person's character, micro-structure and surface chemical property in key
Agent.
In the prior art have room temperature catalytic oxidation method removal formaldehyde catalyst be made, such as application No. is
200710121423.9 Chinese patent provides " a kind of catalyst of complete oxidation of formaldehyde at room temperature ", by porosity without
Machine oxide carrier, noble metal component and adjuvant component three parts composition；Porous inorganic oxide carrier is ceria, two
Zirconium oxide, titanium dioxide, aluminum oxide, stannic oxide, silica, lanthanum sesquioxide, magnesia, zinc oxide therein one
Kind or more than one mixtures or its composite oxides, zeolite, sepiolite, porosity Carbon Materials；Catalyst noble metal group is divided into
At least one of platinum, rhodium, palladium, gold, silver, adjuvant component are at least one of alkali metal lithium, sodium, potassium, rubidium, caesium, wherein catalyst
Used in noble metal component by metal element wt conversion based on load capacity be 0.1-10%, preferably 0.3-2%, the invention
Catalyst roasted in the preparation, maturing temperature be 200~700 DEG C, surface holes abundant can be just obtained after roasting
The composite catalyst of structure.
Summary of the invention
The object of the present invention is to provide a kind of room temperatures to remove formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst,
Preparation method is simple, it is only necessary to the preparation of one step hydro thermal method then achievable composite catalyst；The Pd/Cu of preparationxO@GO is compound to be urged
Agent activity is high, can be by the formaldehyde of high concentration fast decoupled in a short time.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of room temperature removes formaldehyde gas Pd/CuxO@GO
The preparation method of composite catalyst, comprising the following steps:
1) copper salt solution and GO solution are mixed and forms solution A；Sequentially added in solution A palladium salt solution, solvable alkali and
Reducing solution forms B solution；
2) C solution is obtained after B solution being carried out hydro-thermal reaction, the solid in C solution is obtained through centrifuge washing, drying, grinding
Obtain Pd/CuxO@GO composite catalyst.
Further, in step 1) copper salt solution and GO solution with mass concentration ratio for 6.67~33.33:2.9, volume ratio
It mixes to form solution A for 30:7.
Specifically, mantoquita is one of copper acetate, copper chloride or copper sulphate, and palladium salt is palladium chloride or palladium acetate, solvable
Alkali is NaOH or KOH, reducing solution NaBH4Solution or KBH4Solution.
Further, the mass concentration of palladium salt solution is 8~10g/L, the molar concentration of reducing solution is 0.1~
The mass ratio of 0.5mol/L, solvable alkali and mantoquita is 1:1.
Still further, mantoquita and the mass ratio of palladium salt are 0.20~1.0:0.024.
Further, the time of hydro-thermal reaction is 8~12h in step 2), and temperature is 120~200 DEG C.
Further, temperature dry in step 2) is 75~95 DEG C, and the dry time is 8~12h.
1) present invention uses one step hydro thermal method by Pd in-situ deposition in CuxOn O@GO (graphene oxide) carrier, without height
Temperature calcining or roasting, step is few, easy to operate；2) Pd in-situ deposition is in CuxOn O@GO carrier, be conducive to each component in nanoscale
On close contact, enhance Pd/CuxThe reactivity of O@GO composite catalyst；3) GO Surface oxygen-containing groups rich in, this
A little oxygen-containing functional groups can not only improve the absorption property of catalyst PARA FORMALDEHYDE PRILLS(91,95), also help the further of oxidation of formaldehyde intermediate product
Oxidation converts the formaldehyde of high concentration comparatively fast within a certain period of time and decomposes, and concentration quickly reduces.
Detailed description of the invention
Fig. 1 is Pd/Cu prepared by the present inventionxThe XRD spectra of O@GO composite catalyst.
Fig. 2 is Pd/Cu prepared by the present inventionxThe SEM figure (Fig. 2 (a)) and EDS spectrogram (Fig. 2 of O@GO composite catalyst
(b))。
Fig. 3 is to use Pd/Cu prepared by the present invention at room temperaturexThe Pd/ Cu of O@GO composite catalyst and two-step method preparationxO@
The effect picture of GO composite catalyst PARA FORMALDEHYDE PRILLS(91,95) catalysis.
Fig. 4 is Pd/Cu prepared by the present inventionxO@GO composite catalyst is reused many times pair of room temperature removal formaldehyde efficiency
Than figure.
Specific embodiment
Below with reference to preferred embodiment, invention is further described in detail, convenient for more clearly understanding this
Invention, but the present invention is not limited to following specific embodiments.
The selection of reactant: the present invention uses CuxO is as Pd/CuxOne of the component of O@GO composite catalyst, CuxIn O
Cu element be+1 or+divalent, the Cu of+1 valence2O has oxidation and reduction characteristic simultaneously, which can make CuxO carrier and your gold
Belonging between Pd has strong interaction, to be conducive to enhance composite catalyst activity.The surface layered graphite oxide alkene (GO)
Containing a large amount of oxygen-containing functional groups, such as hydroxyl, carboxyl, epoxy group, these oxygen-containing groups pass through hydrogen bond action formaldehyde adsorption molecule,
To be conducive to the enrichment of formaldehyde molecule on a catalyst.
The invention belongs to one-step method, the one-step method refers to that mixed solution can directly be made by one step hydro thermal method and urges
Agent.
A kind of room temperature of the present invention removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst, including following step
It is rapid:
1) by copper salt solution and GO solution with mass concentration ratio for 6.67~33.33:2.9, volume ratio is that 30:7 mixes shape
At solution A；The reproducibility that the palladium salt solution of 8~10g/L, solvable alkali and 0.1~0.5 mol/L are sequentially added in solution A is molten
Liquid forms B solution；Mantoquita can be one of for copper acetate, copper chloride or copper sulphate, and palladium salt is palladium chloride or palladium acetate, can
Molten alkali is NaOH or KOH, reducing solution NaBH4Solution or KBH4Solution；The mass ratio of solvable alkali and mantoquita is 1:1, mantoquita
Mass ratio with palladium salt is 0.20~1.0:0.024；
2) B solution is obtained into C solution after temperature is 120~200 DEG C of 8~12h of progress hydro-thermal reaction, consolidating in C solution
Body obtains Pd/Cu through 8~12h dry at centrifuge washing, 75~95 DEG C, grindingxO@GO composite catalyst.
In following preferred embodiments, mantoquita selects copper acetate, and copper chloride, copper sulphate have comparable effect to imitate
Fruit repeats no more in the description；Palladium salt selects palladium chloride, and palladium acetate has comparable function and effect, no longer superfluous in the description
It states；Solvable alkali selects NaOH, KOH to have comparable effect, repeat no more in the description；Reducing solution is NaBH4Solution,
KBH4Solution has comparable function and effect, repeats no more in the description.
Embodiment 1
By 0.25g Cu (Ac)2It is dissolved in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added, fills it
It is uniformly dispersed to form solution A；The PdCl that 3mL concentration is 8g/L is added in solution A2Solution adds 0.25g NaOH, so
The NaBH that 5mL concentration is 0.1mol/L is added afterwards4Solution continues to stir evenly to form B solution；B solution is transferred to water heating kettle
In, 12h, which is reacted, at 180 DEG C obtains C solution；Solid in C solution is through centrifuge washing, and dry 8h is to drying at 80 DEG C, grinding
After obtain Pd/CuxO@GO composite catalyst.
The Pd/Cu for taking above-described embodiment 1 to preparexO@GO composite catalyst 0.10g is placed in surface plate, extremely by the surface plate
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, will be certain density dense
Formalin is injected in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 244.2ppm, by glass
Glass lid is removed, at this time Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, the concentration variation of formaldehyde
It is monitored on-line by Multi-Component Gas Analyzing instrument (INNOVA air Tech Instruments Model 1412), reaction
After 111min, concentration of formaldehyde 70.2ppm, formaldehyde removal rate is 71.3%.
Embodiment 2
By 0.20g Cu (Ac)2It is dissolved in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added, fills it
It is uniformly dispersed to form solution A；The PdCl that 2.4mL concentration is 10g/L is added in solution A2Solution adds 0.20g
Then the NaBH that 10mL concentration is 0.1mol/L is added in NaOH4Solution continues to stir evenly to form B solution；B solution is shifted
Into water heating kettle, 12h is reacted at 120 DEG C and obtains C solution；Dry 9h is extremely through centrifuge washing, at 80 DEG C for solid in C solution
Drying, obtains Pd/Cu after grindingxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 2xO@GO composite catalyst 0.10g is placed in surface plate, extremely by the surface plate
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, will be certain density dense
Formalin is injected in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 243.5ppm, by glass
Glass lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through
Multi-Component Gas Analyzing instrument (INNOVA air Tech Instruments Model 1412) on-line monitoring, reacts 111min
Afterwards, concentration of formaldehyde 75.6ppm, formaldehyde removal rate are 69.0%.
Embodiment 3
By 0.5g Cu (Ac)2It is dissolved in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added, make it sufficiently
It is uniformly dispersed to form solution A；The PdCl that 3mL concentration is 8g/L is added in solution A2Solution adds 0.5g NaOH, then
The NaBH that 1mL concentration is 0.5mol/L is added4Solution continues to stir evenly to form B solution；B solution is transferred in water heating kettle,
12h is reacted at 180 DEG C obtains C solution；Solid in C solution is through centrifuge washing, and dry 10h is to drying at 80 DEG C, after grinding
Obtain Pd/CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 3xO@GO composite catalyst 0.10g is placed in surface plate, extremely by the surface plate
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, will be certain density dense
Formalin is injected in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 247ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through more
Component gas analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring, after reacting 111min,
Concentration of formaldehyde is 165.7ppm, and formaldehyde removal rate is 32.9%.
Embodiment 4
By 0.75g Cu (Ac)2It is dissolved in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added, fills it
It is uniformly dispersed to form solution A；The PdCl that 3mL concentration is 8g/L is added in solution A2Solution adds 0.75g NaOH, so
The NaBH that 5mL concentration is 0.1mol/L is added afterwards4Solution continues to stir evenly to form B solution；B solution is transferred to water heating kettle
In, 12h, which is reacted, at 200 DEG C obtains C solution；Solid in C solution is through centrifuge washing, and dry 8h is to drying at 95 DEG C, grinding
After obtain Pd/CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 4xO@GO composite catalyst 0.10g is placed in surface plate, extremely by the surface plate
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, will be certain density dense
Formalin is injected in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 234.5ppm, by glass
Glass lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through
Multi-Component Gas Analyzing instrument (INNOVA air Tech Instruments Model 1412) on-line monitoring, reacts 111min
Afterwards, concentration of formaldehyde 148.2ppm, formaldehyde removal rate are 36.8%.
Embodiment 5
By 1.0g Cu (Ac)2It is dissolved in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added, make it sufficiently
It is uniformly dispersed to form solution A；The PdCl that 3mL concentration is 8g/L is added in solution A2Solution adds 1.0g NaOH, then
The NaBH that 5mL concentration is 0.1mol/L is added4Solution continues to stir evenly to form B solution；B solution is transferred in water heating kettle,
12h is reacted at 180 DEG C obtains C solution；Through centrifuge washing, dry 8h at 80 DEG C obtains Pd/ after grinding for solid in C solution
CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 5xO@GO composite catalyst 0.10g is placed in surface plate, extremely by the surface plate
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, will be certain density dense
Formalin is injected in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 230ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through more
Component gas analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring, after reacting 111min,
Concentration of formaldehyde is 150ppm, and formaldehyde removal rate is 34.8%.
Embodiment 6
By 0.25g Cu (Ac)2It is dissolved in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added, fills it
It is uniformly dispersed to form solution A；The PdCl that 3mL concentration is 8g/L is added in solution A2Solution adds 0.25g NaOH, so
The NaBH that 3mL concentration is 0.5mol/L is added afterwards4Solution continues to stir evenly to form B solution；B solution is transferred to water heating kettle
In, 8h, which is reacted, at 200 DEG C obtains C solution；Through centrifuge washing, dry 12h at 75 DEG C is obtained after grinding for solid in C solution
Pd/CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 6xO@GO composite catalyst 0.10g is placed in surface plate, extremely by the surface plate
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, will be certain density dense
Formalin is injected in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 241ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through more
Component gas analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring, after reacting 111min,
Concentration of formaldehyde is 86.5ppm, and formaldehyde removal rate is 64.1%.
Comparative example 1
0.25g copper acetate and 0.78g CTAB is taken to be dissolved in 40mL water, after completely dissolution, 4mL concentration, which is added, is
The NaOH solution of 0.5mol/L, the hydro-thermal process 12h at 120 DEG C are centrifuged, washing, after alcohol is washed, 80 DEG C of drying at least 8h, and grinding
And obtain CuO solid；It takes 0.3g CuO solid to be dispersed in 30mL water, the GO solution that 7mL concentration is 2.9g/L is then added,
3mL concentration is the PdCl of 8g/L2Solution continues to stir evenly；It is 0.1mol/L NaBH that 5mL concentration is added in the solution later4+
0.1mol/L NaOH mixed solution is evaporated in 80 DEG C of stirrings, obtains Pd/CuxO@GO composite catalyst.This method is two-step method, is
Hydro-thermal method+chemical reduction method.
Pd/Cu prepared by above-mentioned comparison 1xO@GO composite catalyst 0.10g is placed in surface plate, by the surface plate as
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, by certain density dense first
Aldehyde solution injects in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 227.8ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through more
Component gas analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring, after reacting 111min,
Concentration of formaldehyde is 168.9ppm, and formaldehyde removal rate is 25.9%.
Comparative example 2
By 0.25g Cu (Ac)2It is dissolved in 30mL water, the PdCl that 3mL concentration is 8g/L is then added2Solution fills it
It is uniformly dispersed；0.25g NaOH is added later, adds the NaBH that 5mL concentration is 0.1mol/L4It is equal to continue stirring for solution
It is even；The solution of mixing is transferred in water heating kettle, reacts 12h at 180 DEG C, centrifuge washing, dry 8h at 80 DEG C, after grinding
Obtain Pd/CuxO composite catalyst.
Pd/Cu prepared by above-mentioned comparison 2xO@GO composite catalyst 0.10g is placed in surface plate, by the surface plate as
In the organic glass reactor of 5.9L, glass cover is covered.Reactor bottom places the fan of a 5W, by certain density dense first
Aldehyde solution injects in reactor, and formaldehyde volatilization is until concentration balance, and the initial concentration after formaldehyde balances is 228.2ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalyst contacts with each other with formaldehyde gas and is reacted, and the concentration variation of formaldehyde passes through more
Component gas analyzer (INNOVA air Tech Instruments Model 1412) on-line monitoring, after reacting 111min,
Concentration of formaldehyde is 174.6ppm, and formaldehyde removal rate is 23.5%.
It can be obtained by Examples 1 to 6 and comparative example 1~2, using Pd/Cu prepared by the present inventionxO@GO composite catalyst is short
In the case where time 111min and high concentration of formaldehyde, formaldehyde removal efficiency is above the Pd/Cu of 1 two-step method of comparative example preparationxO@
The Pd/Cu of GO composite catalyst and one step hydro thermal method preparationxO composite catalyst.Simultaneously in the preparation when the amount of the mantoquita used
It is less when being 0.2~0.25g, under equal conditions test, 0.10g Pd/CuxO@GO composite catalyst is in 111min to height
The removal efficiency of concentration formaldehyde (230~245ppm) is high.Specific preparation method is copper salt solution and GO solution with mass concentration ratio
For 6.67~8.33:2.9, volume ratio is that 30:7 mixes to form solution A；The palladium salt that 8~10g/L is sequentially added in solution A is molten
The reducing solution of liquid, solvable alkali and 0.1~0.5mol/L forms B solution；Mantoquita can be copper acetate, copper chloride or sulfuric acid
One of copper, palladium salt are palladium chloride or palladium acetate, and solvable alkali is NaOH or KOH, reducing solution NaBH4Solution or KBH4
Solution；The mass ratio of solvable alkali and mantoquita is 1:1, and the mass ratio of mantoquita and palladium salt is 0.20~0.25:0.024；By B solution
Temperature be 120~200 DEG C of 8~12h of progress hydro-thermal reaction after obtain C solution, the solid in C solution through centrifuge washing, 75~
Dry 8~12h, grinding obtain Pd/Cu at 95 DEG CxO@GO composite catalyst, under equal conditions test, 0.10g Pd/CuxO@
GO composite catalyst is 64% or more to the removal efficiency of high-concentration formaldehyde (230~245ppm) in 111min, increases reaction
Time is completely removed to 160min formaldehyde.
The Pd/Cu prepared with embodiment 1xO@GO composite catalyst is tested and is characterized, as follows:
Pd/Cu as shown in Figure 1xThe XRD diagram of O@GO composite catalyst is it is found that Pd/CuxO@GO composite catalyst mainly by
Cu2O and CuO phase composition, does not observe the XRD diffraction maximum of GO and Pd, mainly they content is less or high degree of dispersion.
The Pd/Cu as shown in Fig. 2 (a)xThe SEM of O@GO composite catalyst schemes it is found that the Cu to reunitexO is supported on the GO of fold
Surface, CuxThe size of O particle is nanoscale；The Pd/Cu shown in Fig. 2 (b)xIt, can be in the EDS figure of O GO composite catalyst
The presence for observing Pd, shows Pd/CuxO@GO composite catalyst is successfully prepared.
Pd/Cu prepared by embodiment 1 as shown in Figure 3xThe Pd/ of O@GO composite catalyst and the preparation of 1 two-step method of comparative example
CuxO@GO composite catalyst room temperature be catalyzed formaldehyde performance map it is found that by 160min formaldehyde catalysis reaction after, Pd/CuxO@GO
Catalyst can be at room temperature by the HCHO exhaustive oxidation of high concentration at CO2And water, compared with comparative example 1, prepared by embodiment 1
Pd/CuxThe catalytic performance of O@GO composite catalyst PARA FORMALDEHYDE PRILLS(91,95) is much better than Pd/Cu prepared by comparative example 1xO@GO composite catalyst.
Pd/Cu prepared by embodiment 1 as shown in Figure 4xThe multiple room temperature of O@GO composite catalyst removes high-concentration formaldehyde
Effect picture, as can be seen from Figure 4 prepared Pd/CuxO@GO composite catalyst be reused many times after at 111min pairs
The removal efficiency of high-concentration formaldehyde remains unchanged.
Unspecified content is the prior art known to a person of ordinary skill in the art in this specification.
Above-described specific embodiment is only schematical, and used technical term is limited in the present invention
For qualifier only for convenience of description of the invention, those skilled in the art remove formaldehyde gas Pd/ in room temperature of the present invention
CuxUnder the enlightenment of the preparation method of O@GO composite catalyst, present inventive concept and scope of the claimed protection are not being departed from
In the case of, many forms can be also derived, these are within the scope of the present invention.
Claims (4)
1. a kind of room temperature removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst, which is characterized in that including following step
It is rapid:
1) by copper salt solution and GO solution with mass concentration ratio for 6.67~33.33:2.9, volume ratio is that 30:7 mixes that form A molten
Liquid；Palladium salt solution, solvable alkali and reducing solution are sequentially added in solution A, form B solution；Wherein, the solvable alkali is
NaOH or KOH, reducing solution NaBH4Solution or KBH4Solution；The mass ratio of the solvable alkali and mantoquita be 1:1, mantoquita with
The mass ratio of palladium salt is 0.20~0.25:0.024；
2) C solution is obtained after B solution being carried out hydro-thermal reaction, the solid in C solution obtains Pd/ through centrifuge washing, drying, grinding
CuxO@GO composite catalyst；The time of hydro-thermal reaction is 8~12h, and temperature is 120~200 DEG C.
2. room temperature according to claim 1 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst, feature
Be: mantoquita is one of copper acetate, copper chloride or copper sulphate, and palladium salt is palladium chloride or palladium acetate.
3. room temperature according to claim 1 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst, feature
Be: the mass concentration of palladium salt solution is 8~10g/L, and the molar concentration of reducing solution is 0.1~0.5mol/L.
4. room temperature according to claim 1 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalyst, feature
Be: dry temperature is 75~95 DEG C in step 2), and the dry time is 8~12h.
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| CN112023937B (en) * | 2019-11-26 | 2022-10-21 | 天津大学 | Nano copper oxide coated palladium nanowire heterogeneous catalyst, preparation method thereof and application thereof in methanol electrocatalytic oxidation |
| CN112588299A (en) * | 2020-12-29 | 2021-04-02 | 苏州美吉科环保科技有限公司 | Method for treating polluted air based on composite catalyst |
| CN112588298A (en) * | 2020-12-29 | 2021-04-02 | 苏州美吉科环保科技有限公司 | Composite catalyst for air purification and preparation method and application thereof |
| CN112774691B (en) * | 2021-01-27 | 2022-04-19 | 宁波方太厨具有限公司 | Preparation method of aldehyde-removing catalyst |
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