CN107159262A - Room temperature removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts - Google Patents
Room temperature removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts Download PDFInfo
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- CN107159262A CN107159262A CN201710486313.6A CN201710486313A CN107159262A CN 107159262 A CN107159262 A CN 107159262A CN 201710486313 A CN201710486313 A CN 201710486313A CN 107159262 A CN107159262 A CN 107159262A
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Abstract
Formaldehyde gas Pd/Cu is removed the invention discloses a kind of room temperaturexThe preparation method of O@GO composite catalysts, 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, B solution is formed；The solid obtained after B solution progress hydro-thermal reaction in C solution, C solution is obtained into Pd/Cu through centrifuge washing, drying, grindingxO@GO composite catalysts.Using one step hydro thermal method by Pd in-situ depositions in CuxOn O@GO carriers, be conducive to close contact of each component on nanoscale, strengthen Pd/CuxThe reactivity of O@GO composite catalysts, without high-temperature calcination or roasting, step is few, it is easy to operate, the Surface oxygen-containing groups enriched on GO can improve the absorption property of catalyst PARA FORMALDEHYDE PRILLS(91,95), be conducive to the further oxidation of oxidation of formaldehyde intermediate product, make the formaldehyde comparatively fast conversion decomposition within a short period of time of high concentration, concentration is quickly reduced.
Description
Technical field
The invention belongs to nanocatalyst preparing technical field, specifically a kind of room temperature removes formaldehyde gas Pd/CuxO@GO
The preparation method of composite catalyst.
Background technology
Concentration of formaldehyde in house decoration rear chamber is high, and harm to the human body is serious.The existing method for removing formaldehyde has physics
Absorption method, chemiadsorption, photocatalytic degradation method and plasma method etc., room temperature catalytic oxidation method is without extra means and energy
Carbon dioxide and water, environmental protection and energy saving efficiency high can be oxidized the formaldehyde into.During effective catalyst is then room temperature catalytic oxidation method
Key, by changing carrier person's character, micro-structural and surface chemical property, can be made new and effective carried noble metal catalysis
Agent.
The catalyst for having room temperature catalytic oxidation method removal formaldehyde in the prior art is made, such as Application No.
200710121423.9 Chinese patent provide " a kind of catalyst of complete oxidation of formaldehyde at room temperature ", its by porous without
Machine oxide carrier, noble metal component and the part of adjuvant component three composition；Porous inorganic oxide carrier is ceria, two
Zirconium oxide, titanium dioxide, alundum (Al2O3), tin ash, silica, lanthanum sesquioxide, magnesia, zinc oxide therein one
Plant or more than one mixtures or its composite oxides, zeolite, sepiolite, porous Carbon Materials；Catalyst noble metal component is
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
Load capacity of the middle noble metal component used based on the conversion of metal element wt is 0.1-10%, preferably 0.3-2%, the invention
Catalyst need to be calcined in the preparation, sintering temperature be 200~700 DEG C, abundant surface holes can be just obtained after roasting
The composite catalyst of structure.
The content of the invention
Formaldehyde gas Pd/Cu is removed it is an object of the invention to provide a kind of room temperaturexThe preparation method of O@GO composite catalysts,
Preparation method is simple, it is only necessary to which one step hydro thermal method can then complete the preparation of composite catalyst；The Pd/Cu of preparationxO@GO are 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：A kind of room temperature removes formaldehyde gas Pd/CuxO@GO
The preparation method of composite catalyst, comprises 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) solid in C solution, C solution will be obtained after B solution progress hydro-thermal reaction to obtain through centrifuge washing, drying, grinding
Obtain Pd/CuxO@GO composite catalysts.
Further, step 1) in copper salt solution and GO solution using mass concentration ratio as 6.67~33.33：2.9, volume ratio
For 30：7 mixings form solution A.
Specifically, mantoquita be copper acetate, copper chloride or copper sulphate in one kind, palladium salt be palladium bichloride or palladium, it is solvable
Alkali is NaOH or KOH, and reducing solution is NaBH4Solution or KBH4Solution.
Further, the mass concentration of palladium salt solution is 8~10g/L, the molar concentration of reducing solution for 0.1~
0.5mol/L, the mass ratio of solvable alkali and mantoquita is 1:1.
Yet further, mantoquita and the mass ratio of palladium salt are 0.20~1.0：0.024.
Further, step 2) in hydro-thermal reaction time be 8~12h, temperature be 120~200 DEG C.
Further, step 2) in the temperature dried be 75~95 DEG C, dry time is 8~12h.
1) present invention uses one step hydro thermal method by Pd in-situ depositions in CuxOn O@GO (graphene oxide) carrier, without height
Temperature calcining is calcined, and step is few, easy to operate；2) Pd in-situ depositions are in CuxOn O@GO carriers, be conducive to each component in nanoscale
On close contact, strengthen Pd/CuxThe reactivity of O@GO composite catalysts；3) GO contains abundant Surface oxygen-containing groups, 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, makes the formaldehyde comparatively fast conversion decomposition within a certain period of time of high concentration, and concentration is quickly reduced.
Brief description of the drawings
The Pd/Cu that Fig. 1 is prepared for the present inventionxThe XRD spectra of O@GO composite catalysts.
The Pd/Cu that Fig. 2 is prepared for the present inventionxThe SEM figures (Fig. 2 (a)) and EDS spectrograms (Fig. 2 of O@GO composite catalysts
(b))。
Fig. 3 is at room temperature using the Pd/Cu of the invention preparedxPd/Cu prepared by O@GO composite catalysts and two-step methodxO@
The design sketch of GO composite catalysts PARA FORMALDEHYDE PRILLS(91,95) catalysis.
The Pd/Cu that Fig. 4 is prepared for the present inventionxO@GO composite catalysts are reused many times pair that room temperature removes formaldehyde efficiency
Than figure.
Embodiment
The present invention is described in further detail with reference to preferred embodiment, is easy to more clearly understand this
Invention, but the present invention is not limited to following embodiments.
The selection of reactant：The present invention uses CuxO is used as Pd/CuxOne of component of O@GO composite catalysts, CuxIn O
Cu elements are+1 or+divalent, the Cu of+1 valency2O has oxidation and reduction characteristic simultaneously, and the characteristic can make CuxO carriers and noble metal
There is strong interaction between Pd, so as to be conducive to enhancing composite catalyst activity.Layered graphite oxide alkene (GO) surface contains
Have an a large amount of oxygen-containing functional groups, such as hydroxyl, carboxyl, epoxy radicals, these oxy radicals by hydrogen bond action formaldehyde adsorption molecule, from
And 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 just can directly be made by one step hydro thermal method and urged
Agent.
A kind of room temperature of the present invention removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, including following step
Suddenly：
1) by copper salt solution and GO solution using mass concentration ratio as 6.67~33.33：2.9, volume ratio is 30：7 mix shape
Into solution A；The reproducibility that 8~10g/L palladium salt solution, solvable alkali and 0.1~0.5mol/L are sequentially added in solution A is molten
Liquid, forms B solution；Mantoquita can be copper acetate, copper chloride or copper sulphate in one kind, palladium salt be palladium bichloride or palladium, can
Molten alkali is NaOH or KOH, and reducing solution is 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) the consolidating in C solution, C solution are obtained after temperature is 120~200 DEG C of 8~12h of progress hydro-thermal reaction by B solution
Body obtains Pd/Cu through drying 8~12h, grinding at centrifuge washing, 75~95 DEG CxO@GO composite catalysts.
In following preferred embodiments, mantoquita selects copper acetate, and copper chloride, copper sulphate play the role of suitable effect
Really, repeat no more in the description；Palladium salt selects palladium bichloride, and palladium has suitable action effect, no longer goes to live in the household of one's in-laws on getting married in the description
State；It is suitable that solvable alkali selects NaOH, KOH to play the role of, and repeats no more in the description；Reducing solution is NaBH4Solution,
KBH4Solution has suitable action effect, repeats no more in the description.
Embodiment 1
By 0.25g Cu (Ac)2It is dissolved in 30mL water, then adds the GO solution that 7mL concentration is 2.9g/L, fill 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 to form B solution；B solution is transferred to water heating kettle
In, reaction 12h obtains C solution at 180 DEG C；Solid in C solution dries 8h to drying, grinding through centrifuge washing at 80 DEG C
After obtain Pd/CuxO@GO composite catalysts.
The Pd/Cu for taking above-described embodiment 1 to preparexO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate extremely
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, will be certain density dense
In formalin injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 244.2ppm, by glass
Glass lid is removed, now Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, the change in concentration of formaldehyde
Monitored on-line by Multi-Component Gas Analyzing instrument (INNOVAair Tech Instruments Model 1412), reaction
After 111min, concentration of formaldehyde is 70.2ppm, and formaldehyde clearance is 71.3%.
Embodiment 2
By 0.20g Cu (Ac)2It is dissolved in 30mL water, then adds the GO solution that 7mL concentration is 2.9g/L, fill 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
NaOH, then adds the NaBH that 10mL concentration is 0.1mol/L4Solution, continues to stir to form B solution；B solution is shifted
Into water heating kettle, reaction 12h obtains C solution at 120 DEG C；Solid in C solution dries 9h to drying through centrifuge washing at 80 DEG C
It is dry, Pd/Cu is obtained after grindingxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 2xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate extremely
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, will be certain density dense
In formalin injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 243.5ppm, by glass
Glass lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through
Multi-Component Gas Analyzing instrument (INNOVA air Tech Instruments Model 1412) is monitored on-line, reacts 111min
Afterwards, concentration of formaldehyde is 75.6ppm, and formaldehyde clearance is 69.0%.
Embodiment 3
By 0.5g Cu (Ac)2It is dissolved in 30mL water, then adds the GO solution that 7mL concentration is 2.9g/L, make its abundant
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
Add the NaBH that 1mL concentration is 0.5mol/L4Solution, continues to stir to form B solution；B solution is transferred in water heating kettle,
12h is reacted at 180 DEG C and obtains C solution；Solid in C solution dries 10h to drying, after grinding through centrifuge washing at 80 DEG C
Obtain Pd/CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 3xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate extremely
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, will be certain density dense
In formalin injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 247ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through many
Component gas analyzer (INNOVA air Tech Instruments Model 1412) is monitored on-line, after reaction 111min,
Concentration of formaldehyde is 165.7ppm, and formaldehyde clearance is 32.9%.
Embodiment 4
By 0.75g Cu (Ac)2It is dissolved in 30mL water, then adds the GO solution that 7mL concentration is 2.9g/L, fill 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 to form B solution；B solution is transferred to water heating kettle
In, reaction 12h obtains C solution at 200 DEG C；Solid in C solution dries 8h to drying, grinding through centrifuge washing at 95 DEG C
After obtain Pd/CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 4xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate extremely
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, will be certain density dense
In formalin injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 234.5ppm, by glass
Glass lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through
Multi-Component Gas Analyzing instrument (INNOVA air Tech Instruments Model 1412) is monitored on-line, reacts 111min
Afterwards, concentration of formaldehyde is 148.2ppm, and formaldehyde clearance is 36.8%.
Embodiment 5
By 1.0g Cu (Ac)2It is dissolved in 30mL water, then adds the GO solution that 7mL concentration is 2.9g/L, make its abundant
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
Add the NaBH that 5mL concentration is 0.1mol/L4Solution, continues to stir to form B solution；B solution is transferred in water heating kettle,
12h is reacted at 180 DEG C and obtains C solution；Solid in C solution dries 8h at 80 DEG C, Pd/ is obtained after grinding through centrifuge washing
CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 5xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate extremely
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, will be certain density dense
In formalin injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 230ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through many
Component gas analyzer (INNOVA air Tech Instruments Model 1412) is monitored on-line, after reaction 111min,
Concentration of formaldehyde is 150ppm, and formaldehyde clearance is 34.8%.
Embodiment 6
By 0.25g Cu (Ac)2It is dissolved in 30mL water, then adds the GO solution that 7mL concentration is 2.9g/L, fill 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 to form B solution；B solution is transferred to water heating kettle
In, reaction 8h obtains C solution at 200 DEG C；Solid in C solution is dried 12h at 75 DEG C, obtained after grinding through centrifuge washing
Pd/CuxO@GO catalyst.
Pd/Cu prepared by above-described embodiment 6xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate extremely
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, will be certain density dense
In formalin injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 241ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through many
Component gas analyzer (INNOVA air Tech Instruments Model 1412) is monitored on-line, after reaction 111min,
Concentration of formaldehyde is 86.5ppm, and formaldehyde clearance is 64.1%.
Comparative example 1
0.25g copper acetates and 0.78g CTAB is taken to be dissolved in 40mL water, fully after dissolving, adding 4mL concentration is
0.5mol/L NaOH solution, the hydro-thermal process 12h at 120 DEG C is centrifuged, washing, after alcohol is washed, 80 DEG C of drying at least 8h, grinding
And obtain CuO solids；Take 0.3g CuO solids to be dispersed in 30mL water, then add the GO solution that 7mL concentration is 2.9g/L,
3mL concentration is 8g/L PdCl2Solution, continues to stir；It is 0.1mol/L NaBH to add 5mL concentration in the solution afterwards4+
0.1mol/L NaOH mixed solutions, are evaporated in 80 DEG C of stirrings, obtain Pd/CuxO@GO composite catalysts.This method is two-step method, is
Hydro-thermal method+chemical reduction method.
Pd/Cu prepared by above-mentioned contrast 1xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate as
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, by certain density dense first
In aldehyde solution injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 227.8ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through many
Component gas analyzer (INNOVA air Tech Instruments Model 1412) is monitored on-line, after reaction 111min,
Concentration of formaldehyde is 168.9ppm, and formaldehyde clearance is 25.9%.
Comparative example 2
By 0.25g Cu (Ac)2It is dissolved in 30mL water, then adds the PdCl that 3mL concentration is 8g/L2Solution, fills it
It is uniformly dispersed；0.25g NaOH are added afterwards, add the NaBH that 5mL concentration is 0.1mol/L4Solution, continues to stir equal
It is even；The solution of mixing is transferred in water heating kettle, 12h is reacted at 180 DEG C, centrifuge washing dries 8h at 80 DEG C, after grinding
To Pd/CuxO composite catalysts.
Pd/Cu prepared by above-mentioned contrast 2xO@GO composite catalysts 0.10g is placed in surface plate, by the surface plate as
In 5.9L lucite reactor, glass cover is covered.Reactor bottom places 5W fan, by certain density dense first
In aldehyde solution injection reactor, formaldehyde volatilization is until the initial concentration after concentration balance, formaldehyde balance is 228.2ppm, by glass
Lid is removed, Pd/CuxO@GO composite catalysts contact with each other and reacted with formaldehyde gas, and the change in concentration of formaldehyde passes through many
Component gas analyzer (INNOVA air Tech Instruments Model 1412) is monitored on-line, after reaction 111min,
Concentration of formaldehyde is 174.6ppm, and formaldehyde clearance is 23.5%.
It can be obtained by embodiment 1~6 and comparative example 1~2, the Pd/Cu prepared using the present inventionxO@GO composite catalysts are short
In the case of time 111min and high concentration of formaldehyde, formaldehyde removal efficiency is above the Pd/Cu of the two-step method of comparative example 1 preparationxO@
Pd/Cu prepared by GO composite catalysts and one step hydro thermal methodxO composite catalysts.Simultaneously in the preparation when the amount of the mantoquita used
It is less when being 0.2~0.25g, under equal conditions test, 0.10gPd/CuxO@GO composite catalysts are in 111min to highly concentrated
The removal efficiency for spending formaldehyde (230~245ppm) is high.Specific preparation method be copper salt solution and GO solution using mass concentration ratio as
6.67~8.33：2.9, volume ratio is 30：7 mixings form solution A；Sequentially added in solution A 8~10g/L palladium salt solution,
The reducing solution of solvable alkali and 0.1~0.5mol/L, forms B solution；Mantoquita can be in copper acetate, copper chloride or copper sulphate
One kind, palladium salt be palladium bichloride or palladium, solvable alkali be NaOH or KOH, reducing solution is NaBH4Solution or KBH4Solution；
The mass ratio of solvable alkali and mantoquita is 1:1, the mass ratio of mantoquita and palladium salt is 0.20~0.25：0.024；By B solution in temperature
It is 120~200 DEG C of solids for obtain after hydro-thermal reaction 8~12h in C solution, C solution through at centrifuge washing, 75~95 DEG C
Dry 8~12h, grinding and obtain Pd/CuxO@GO composite catalysts, under equal conditions test, 0.10g Pd/CuxO@GO are combined
Catalyst is more than 64% to the removal efficiency of high-concentration formaldehyde (230~245ppm) in 111min, and the increase reaction time arrives
160min formaldehyde is completely removed.
The Pd/Cu prepared with embodiment 1xO@GO composite catalysts are tested and characterized, as follows：
Pd/Cu as shown in Figure 1xKnowable to the XRD of O@GO composite catalysts, Pd/CuxO@GO composite catalysts it is main by
Cu2O and CuO phase compositions, do not observe GO and Pd XRD diffraction maximums, mainly they content is less or high degree of dispersion.
Pd/Cu as shown in Fig. 2 (a)xKnowable to the SEM figures of O@GO composite catalysts, the Cu of reunionxO is supported on the GO of fold
Surface, CuxThe size of O particles is nanoscale；From the Pd/Cu shown in Fig. 2 (b)xIn the EDS figures of O GO composite catalysts, Ke Yiguan
Pd presence is observed, shows Pd/CuxO@GO composite catalysts are successfully prepared.
Pd/Cu prepared by embodiment 1 as shown in Figure 3xPd/ prepared by O@GO composite catalysts and the two-step method of comparative example 1
CuxO@GO composite catalysts room temperature catalysis formaldehyde performance map is understood, after 160min formaldehyde catalytic reaction, Pd/CuxO@GO
Catalyst can be at room temperature by the HCHO exhaustive oxidations of high concentration into 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)s is much better than the Pd/Cu prepared by comparative example 1xO@GO composite catalysts.
Pd/Cu prepared by embodiment 1 as shown in Figure 4xThe multiple room temperature of O@GO composite catalysts removes high-concentration formaldehyde
Design sketch, as can be seen from Figure 4 prepared Pd/CuxO@GO composite catalysts be reused many times after at 111min pairs
The removal efficiency of high-concentration formaldehyde keeps constant.
Unspecified content is prior art known to a person of ordinary skill in the art in this specification.
Above-described embodiment is only schematical, and used technical term is limited in the present invention
Qualifier is only for convenience of description of the invention, and one of ordinary skill in the art removes formaldehyde gas Pd/ in room temperature of the present invention
CuxUnder the enlightenment of the preparation method of O@GO composite catalysts, 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 protection scope of the present invention.
Claims (7)
1. a kind of room temperature removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, it is characterised in that including following step
Suddenly：
1) copper salt solution and GO solution are mixed and forms solution A；Palladium salt solution, solvable alkali and reduction are sequentially added in solution A
Property solution, formed B solution；
2) solid obtained after B solution progress hydro-thermal reaction in C solution, C solution is obtained into Pd/ through centrifuge washing, drying, grinding
CuxO@GO composite catalysts.
2. room temperature according to claim 1 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, its feature
It is：Step 1) in copper salt solution and GO solution using mass concentration ratio as 6.67~33.33：2.9, volume ratio is 30：7 mix shape
Into solution A.
3. room temperature according to claim 1 or 2 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, its
It is characterised by：Mantoquita is one kind in copper acetate, copper chloride or copper sulphate, and palladium salt is palladium bichloride or palladium, and solvable alkali is
NaOH or KOH, reducing solution is NaBH4Solution or KBH4Solution.
4. room temperature according to claim 3 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, its feature
It is：The mass concentration of palladium salt solution is 8~10g/L, and the molar concentration of reducing solution is 0.1~0.5mol/L, solvable alkali
Mass ratio with mantoquita is 1:1.
5. room temperature according to claim 3 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, its feature
It is：Mantoquita and the mass ratio of palladium salt are 0.20~1.0：0.024.
6. room temperature according to claim 1 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, its feature
It is：Step 2) in hydro-thermal reaction time be 8~12h, temperature be 120~200 DEG C.
7. the room temperature according to claim 1 or 6 removes formaldehyde gas Pd/CuxThe preparation method of O@GO composite catalysts, its
It is characterised by：Step 2) in the temperature dried be 75~95 DEG C, dry time is 8~12h.
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| CN112023937A (en) * | 2019-11-26 | 2020-12-04 | 天津大学 | Nano copper oxide coated palladium nanowire heterogeneous catalyst, preparation method thereof and application thereof in methanol electrocatalytic oxidation |
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| CN112774691A (en) * | 2021-01-27 | 2021-05-11 | 宁波方太厨具有限公司 | Preparation method of aldehyde-removing catalyst |
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