CN109939692A - A kind of manganese oxide catalyst and its preparation method and application - Google Patents
A kind of manganese oxide catalyst and its preparation method and application Download PDFInfo
- Publication number
- CN109939692A CN109939692A CN201910113508.5A CN201910113508A CN109939692A CN 109939692 A CN109939692 A CN 109939692A CN 201910113508 A CN201910113508 A CN 201910113508A CN 109939692 A CN109939692 A CN 109939692A
- Authority
- CN
- China
- Prior art keywords
- manganese oxide
- manganese
- oxide catalyst
- nial
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Catalysts (AREA)
Abstract
Invention describes a kind of manganese oxide catalyst and its preparation method and application, for the manganese oxide catalyst by being using nickel aluminum composite metal oxide as carrier, active component is manganese oxide, and mass percentage is 1~20%.The present invention is to prepare a series of nickel aluminium layered composite metal hydroxides (NiAl-LDHs) materials using hydrothermal synthesis method, it is modified by addition manganese nitrate (50% aqueous solution), then roasting is changed into corresponding metal composite oxide at high temperature, and high activity loading type manganese oxide catalyst is prepared.The catalyst is applied in Degradation Formaldehyde technique, the results showed that, under the conditions of normal temperature and pressure natural light, the degradation removal rate of catalyst PARA FORMALDEHYDE PRILLS(91,95) is up to 90% or more.
Description
Technical field
The present invention relates to a kind of high activity loading type manganese oxide catalyst prepared by lamellar precursor method, the catalyst is main
Applied in Degradation Formaldehyde reaction process.
Background technique
It is stepped up with the rapid development of social economy with living standards of the people, people are to environmental protection and air quality
It is required that being also increasingly stringenter.Wherein the indoor pollution of formaldehyde is the most serious, and the formaldehyde of low concentration can stimulate the eyes of human body and exhale
Mucous membrane is inhaled, the exception of liver system, respiratory system and nervous system is caused；And for a long time contact high concentration formaldehyde be cause it is more
Formaldehyde is defined as a kind of carcinogenic substance by the generation of kind cancer, international cancer research institution.Because how efficient removal first
Aldehyde, the health to environment protection field and the mankind are vital.
The method for removing formaldehyde currently on the market mainly has following three kinds: adsorbent material absorbs, enzymatic and catalysis oxidation.
Adsorbent material is mainly active carbon, and it is very fast to start the rate of adsorption, but after adsorptive value saturation, needs to change active carbon, and adsorb
Formaldehyde is easy to come out, and causes secondary pollution.Enzymatic main component is the plant extract factor, and validity period is short, makes for a long time
It is smelly with being easy.Catalysis oxidation includes photocatalyst catalysis and metal oxide oxidation catalyst, and photocatalyst catalysis refers mainly to nanometer titanium dioxide
Degradation Formaldehyde can be to the carbon dioxide and water of free of air pollution by titanium, and service life is longer, but need under ultraviolet lamp ability
It reacts, energy consumption is larger；Metal oxide oxidation catalyst refers mainly to transiting metal oxidation manganese, mainly loads to manganese oxide powder
Absorbent charcoal carrier shows higher catalytic degradation formaldehyde activity, but carried by active carbon body aperture is blocked, under degradation of formaldehyde rate
Drop.Therefore how by manganese oxide powder efficiently in conjunction with carrier, become research hotspot.
Layered composite metal hydroxides (Layered Double Hydroxides, abbreviation LDHs) are an anionoids
Type clay material, is commonly called as hydrotalcite, and chemical constitution formula is [M2+ 1-xM3+ x(OH)2](An-)x/n·mH2O, wherein M2+Representative is located at
Divalent metal in main layer board, can be Mg2+、Ni2+、Zn2+Or Cu2+Deng it is one or more；M3+For trivalent gold
Belong to cation, is Al3+、Cr3+、In3+Or Fe3+Deng；An-It is Cl-、NO3-Or CO3 2-One of or it is a variety of；X is M2+With M3+Rub
That ratio, 0≤x≤1；M is the mole of interlayer hydrone, 2≤m≤4.5.
Summary of the invention
Based on the above issues, the present invention provides a kind of manganese oxide catalyst, the catalyst be using NiAl-LDHs as precursor,
It is modified by addition manganese nitrate, then the nickel aluminum composite metal oxide of the manganese oxide modification handled through high-temperature roasting；Wherein
The mass content of manganese oxide is 1-20%, and the mass content of nickel oxide is 50-70%, and the mass content of aluminium oxide is 20-30%,
Total amount is 100%；
Further, the manganese oxide catalyst is made of active component and carrier, and wherein active component is manganese oxide, is carried
Body is nickel oxide and aluminium oxide；
Further, the manganese oxide particle size is 5~200nm；
Above-mentioned manganese oxide catalyst is the metal composite oxide obtained through LDHs high-temperature roasting, has relatively high ratio
Surface area, small particle size and good thermal stability.Belong to high activity loading type manganese oxide catalyst, room can be substantially reduced
The formaldehyde that finishing pollution volatilizees in interior air, and it is long using the time, and persistence is more preferable, not will cause secondary pollution.
The present invention also provides the preparation methods of above-mentioned manganese oxide catalyst, include the following steps:
(1) it prepares the modified NiAl-LDHs precursor material of manganese: being 2:1-4:1, nitre according to nickel nitrate and nitric acid al mole ratio
Sour nickel and urea mol ratio are 1:2-1:4, and the molar ratio of manganese nitrate and nickel nitrate is 1:3-1:20 and deionized water, are made into
Mixing salt solution；The mixing salt solution prepared is placed in autoclave, in 100~150 DEG C of baking ovens react 12~for 24 hours,
After reaction, be down to room temperature, centrifuge washing slurries until water phase pH is 7, by sample be placed in 80~150 DEG C of oven dryings 8~
For 24 hours, the modified NiAl-LDHs precursor material of manganese can be obtained；
(2) manganese oxide catalyst is prepared: by the modified NiAl-LDHs precursor material of above-mentioned manganese at a temperature of 400~600 DEG C
4-6h is roasted, so that NiAl-LDHs precursor material is changed into corresponding metal composite oxide, to prepare manganese oxide catalysis
Agent.
The beneficial effects of the present invention are:
1, of the invention, the NiAl-LDHs precursor material prepared by hydrothermal synthesis method, metal cation on LDHs laminate
It being influenced in a highly dispersed state by lattice energy, metal ion is transformed into corresponding oxide after roasting, it is limited by lattice energy,
Active component manganese oxide is uniformly distributed on carrier and high degree of dispersion.
2, of the invention, the catalyst of preparation can be substantially reduced the formaldehyde that finishing pollution volatilizees in room air, and make
Long with the time, persistence is more preferable, not will cause secondary pollution.
Specific embodiment:
The present invention is further explained below with reference to specific embodiment.
Embodiment 1:
The method for preparing the NiAl-LDHs precursor material that the manganese that nickel al mole ratio is 2:1 is modified, comprising the following steps:
It is 2:1 according to nickel nitrate/nitric acid al mole ratio, nickel nitrate/urea mol ratio is 1:3, and it is molten to be made into 70mL salt-mixture
Liquid, is added a small amount of manganese nitrate in mixing salt solution in advance, and manganese nitrate and nickel nitrate molar ratio are 1:10.
The mixing salt solution prepared is placed in 100mL autoclave, reacts for 24 hours in 130 DEG C of baking ovens, then spends
The slurries centrifuge washing that ionized water will be prepared is put in 90 DEG C of oven drying 12h, obtains manganese and change until supernatant liquor pH value is 7
The NiAl-LDHs precursor material of property.
By the modified NiAl-LDHs precursor material of manganese obtained above in 450 DEG C of roasting 4h, heating rate is 5 DEG C/min,
The modified high activity loading type manganese oxide catalyst of manganese oxide can be obtained.
Primary analysis method
The modified manganese oxide catalyst active component particle size of manganese oxide: the JEM-2100 type of JEOL company, Japan is used
Projection electron microscope (HRTEM), the catalyst activity component particle size that the present embodiment 1 is prepared are 20-40nm.
Catalyst formaldehyde removal rate detection method
30g manganese oxide catalyst is weighed, is laid on substrate, 1.5 cubes of aldehyde test cabins are placed in, temperature is in cabin
25.3 DEG C, relative humidity 49.2%, initial concentration of formaldehyde 1.08mg/m3, concentration of formaldehyde is 0.05mg/m in rear deck for 24 hours3,
Formaldehyde removal rate is 95.4%.
Embodiment 2:
The method for preparing the NiAl-LDHs precursor that nickel al mole ratio is 3:1, comprising the following steps:
It is 3:1 according to nickel nitrate/nitric acid al mole ratio, nickel nitrate/urea mol ratio is 1:4, and it is molten to be made into 70mL salt-mixture
Liquid, is added a small amount of manganese nitrate in mixing salt solution in advance, and manganese nitrate and nickel nitrate molar ratio are 1:10.
The mixed solution prepared is placed in 100mL autoclave, is reacted for 24 hours in 130 DEG C of baking ovens, then spend from
The slurries centrifuge washing that sub- water will be prepared is put in 100 DEG C of oven drying 12h, obtains manganese and change until supernatant liquor pH value is 7
Property nickel al mole ratio be 3:1 NiAl-LDHs precursor material.
By the modified NiAl-LDHs precursor of manganese obtained above in 500 DEG C of roasting 4h, heating rate is 5 DEG C/min
Obtain the modified high activity loading type manganese oxide catalyst of manganese oxide.
The structure analysis method of catalyst is identical as 1 method of above-described embodiment, and active component particle size is 30-50nm.
33g manganese oxide catalyst is weighed, is laid on substrate, 1.5 cubes of aldehyde test cabins are placed in, temperature is in cabin
24.8 DEG C, relative humidity 46.8%, initial concentration of formaldehyde 0.98mg/m3, concentration of formaldehyde is 0.07mg/m in rear deck for 24 hours3,
Formaldehyde removal rate is 92.3%.
Embodiment 3:
The method for preparing the NiAl-LDHs precursor that nickel al mole ratio is 4:1, comprising the following steps:
It is 4:1 according to nickel nitrate/nitric acid al mole ratio, nickel nitrate/urea mol ratio is 1:4, and it is molten to be made into 70mL salt-mixture
Liquid, is added a small amount of manganese nitrate in mixing salt solution in advance, and manganese nitrate and nickel nitrate molar ratio are 1:10.
The mixed solution prepared is placed in 100mL autoclave, is reacted for 24 hours in 150 DEG C of baking ovens, then spend from
The slurries centrifuge washing that sub- water will be prepared is put in 120 DEG C of oven drying 12h, obtains manganese and change until supernatant liquor pH value is 7
Property nickel al mole ratio be 4:1 NiAl-LDHs precursor material.
By the modified NiAl-LDHs precursor of manganese obtained above in 550 DEG C of roasting 6h, heating rate is 5 DEG C/min
Obtain the modified high activity loading type manganese oxide catalyst of manganese oxide.
The structure analysis method of catalyst is identical as 1 method of above-described embodiment, and active component particle size is 30-50nm.
31g manganese oxide catalyst is weighed, is laid on substrate, 1.5 cubes of aldehyde test cabins are placed in, temperature is in cabin
25.2 DEG C, relative humidity 47.2%, initial concentration of formaldehyde 1.03mg/m3, concentration of formaldehyde is 0.09mg/m in rear deck for 24 hours3,
Formaldehyde removal rate is 91.3%.
Embodiment 4:
The method for preparing the NiAl-LDHs precursor material that the manganese that nickel al mole ratio is 2:1 is modified, comprising the following steps:
It is 2:1 according to nickel nitrate/nitric acid al mole ratio, nickel nitrate/urea mol ratio is 1:2, and it is molten to be made into 70mL salt-mixture
Liquid, is then added manganese nitrate in mixing salt solution, and manganese nitrate and nickel nitrate molar ratio are 1:3.
The mixing salt solution prepared is placed in 100mL autoclave, reacts for 24 hours in 100 DEG C of baking ovens, then spends
The slurries centrifuge washing that ionized water will be prepared is put in 150 DEG C of oven drying 8h, obtains manganese and change until supernatant liquor pH value is 7
The NiAl-LDHs precursor material of property.
By the modified NiAl-LDHs precursor material of manganese obtained above in 600 DEG C of roasting 4h, heating rate is 5 DEG C/min,
The modified high activity loading type manganese oxide catalyst of manganese oxide can be obtained.
Primary analysis method
The modified manganese oxide catalyst active component particle size of manganese oxide: the JEM-2100 type of JEOL company, Japan is used
Projection electron microscope (HRTEM), the catalyst activity component particle size that the present embodiment 1 is prepared are 40-50nm.
Catalyst formaldehyde removal rate detection method
30g manganese oxide catalyst is weighed, is laid on substrate, 1.5 cubes of aldehyde test cabins are placed in, temperature is in cabin
25.3 DEG C, relative humidity 49.2%, initial concentration of formaldehyde 1.08mg/m3, concentration of formaldehyde is 0.05mg/m in rear deck for 24 hours3,
Formaldehyde removal rate is 97.5%.
Embodiment 5:
The method for preparing the NiAl-LDHs precursor material that the manganese that nickel al mole ratio is 2:1 is modified, comprising the following steps:
It is 2:1 according to nickel nitrate/nitric acid al mole ratio, nickel nitrate/urea mol ratio is 1:2, and it is molten to be made into 70mL salt-mixture
Liquid, is then added manganese nitrate in mixing salt solution, and manganese nitrate and nickel nitrate molar ratio are 1:20.
The mixing salt solution prepared is placed in 100mL autoclave, reacts for 24 hours in 130 DEG C of baking ovens, then spends
The slurries centrifuge washing that ionized water will be prepared is put in 80 DEG C of oven dryings for 24 hours, obtains manganese and change until supernatant liquor pH value is 7
The NiAl-LDHs precursor material of property.
By the modified NiAl-LDHs precursor material of manganese obtained above in 400 DEG C of roasting 6h, heating rate is 5 DEG C/min,
The modified high activity loading type manganese oxide catalyst of manganese oxide can be obtained.
Primary analysis method
The modified manganese oxide catalyst active component particle size of manganese oxide: the JEM-2100 type of JEOL company, Japan is used
Projection electron microscope (HRTEM), the catalyst activity component particle size that the present embodiment 1 is prepared are 10-20nm.
Catalyst formaldehyde removal rate detection method
30g manganese oxide catalyst is weighed, is laid on substrate, 1.5 cubes of aldehyde test cabins are placed in, temperature is in cabin
25.3 DEG C, relative humidity 49.2%, initial concentration of formaldehyde 1.08mg/m3, concentration of formaldehyde is 0.05mg/m in rear deck for 24 hours3,
Formaldehyde removal rate is 90.6%.
The above, preferable specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and invention structure
Think of is subject to equivalent replacement or change, should be covered by the scope of protection of the present invention.
Claims (6)
1. a kind of manganese oxide catalyst, which is characterized in that the manganese oxide catalyst is led to using NiAl-LDHs material as precursor
It crosses addition manganese nitrate to be modified, then is fired to obtain the nickel aluminum composite metal oxide of manganese oxide modification, wherein the quality of manganese oxide
Content is 1-20%, and the mass content of nickel oxide is 50-70%, and the mass content of aluminium oxide is 20-30%, total amount 100%.
2. manganese oxide catalyst according to claim 1, speciality are, the manganese oxide is active component, the oxygen
Change nickel and aluminium oxide is carrier.
3. manganese oxide catalyst according to claim 2, speciality are, the active component is deposited in the form of the oxide
Carrier exists in the form of composite oxides.
4. manganese oxide catalyst according to claim 1 to 3, which is characterized in that the manganese oxide particle partial size
Having a size of 5~200nm.
5. a kind of preparation method of manganese oxide catalyst, which comprises the following steps:
(1) it prepares the modified NiAl-LDHs precursor material of manganese: being 2:1-4:1, nickel nitrate according to nickel nitrate and nitric acid al mole ratio
It is 1:2-1:4 with urea mol ratio, the molar ratio of manganese nitrate and nickel nitrate is 1:3-1:20 and deionized water, is made into mixing
Salting liquid is placed in autoclave, in 100~150 DEG C of baking ovens react 12~for 24 hours, after reaction, be down to room temperature,
Sample is placed in 80~150 DEG C of oven dryings 8~for 24 hours until water phase pH is 7 by centrifuge washing slurries, and it is modified that manganese can be obtained
NiAl-LDHs precursor material；
(2) manganese oxide catalyst is prepared: by the modified NiAl-LDHs precursor material of above-mentioned manganese in 400~600 DEG C of roasting temperatures
4-6h, so that NiAl-LDHs precursor material is changed into corresponding metal composite oxide, to prepare manganese oxide catalyst.
6. the application of manganese oxide catalyst according to claim 1, speciality are, the manganese oxide catalyst is applied to
In Degradation Formaldehyde technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113508.5A CN109939692A (en) | 2019-02-14 | 2019-02-14 | A kind of manganese oxide catalyst and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113508.5A CN109939692A (en) | 2019-02-14 | 2019-02-14 | A kind of manganese oxide catalyst and its preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109939692A true CN109939692A (en) | 2019-06-28 |
Family
ID=67007851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910113508.5A Pending CN109939692A (en) | 2019-02-14 | 2019-02-14 | A kind of manganese oxide catalyst and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109939692A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790396A (en) * | 2020-06-15 | 2020-10-20 | 北京化工大学 | Method for preparing p-n type in-situ symbiotic heterojunction material by pyrolysis of nickel-manganese hydrotalcite topological transformation and application |
| CN112619640A (en) * | 2020-12-14 | 2021-04-09 | 陕西科技大学 | Active manganese formaldehyde degradation material and preparation and application thereof |
| CN113061932A (en) * | 2020-11-20 | 2021-07-02 | 北京大学深圳研究生院 | Catalyst and application thereof |
| CN115739113A (en) * | 2022-11-23 | 2023-03-07 | 大气(广东)科技发展有限公司 | Catalyst for catalyzing formaldehyde at room temperature and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1473810A (en) * | 2003-08-07 | 2004-02-11 | 复旦大学 | Catalyst prepared by using M/Mn/Al hydrotalcite as precursor for producing benzyl formaldehyde by gaseous phase hydrogenation of benzoic acid or methoylbenzoatc |
| CN102172524A (en) * | 2011-03-23 | 2011-09-07 | 北京工业大学 | Preparation method and application of lamellar manganese oxide catalyst used for eliminating VOCs (volatile organic compounds) gases at low temperature |
| CN103599793A (en) * | 2013-11-28 | 2014-02-26 | 天津市环境保护科学研究院 | Supported copper-manganese composite oxide catalyst capable of removing formaldehyde at room temperature and preparation method |
| CN106076320A (en) * | 2016-06-12 | 2016-11-09 | 常州大学 | A kind of preparation method of the manganese oxide nanometer sheet for processing waste gas |
| CN106378211A (en) * | 2016-08-29 | 2017-02-08 | 天津大学 | Preparation, regeneration and application of catalyst for oxidation of volatile organic compounds |
| CN106492809A (en) * | 2016-11-18 | 2017-03-15 | 南京工程学院 | A kind of for removing new catalyst of formaldehyde and preparation method thereof |
-
2019
- 2019-02-14 CN CN201910113508.5A patent/CN109939692A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1473810A (en) * | 2003-08-07 | 2004-02-11 | 复旦大学 | Catalyst prepared by using M/Mn/Al hydrotalcite as precursor for producing benzyl formaldehyde by gaseous phase hydrogenation of benzoic acid or methoylbenzoatc |
| CN102172524A (en) * | 2011-03-23 | 2011-09-07 | 北京工业大学 | Preparation method and application of lamellar manganese oxide catalyst used for eliminating VOCs (volatile organic compounds) gases at low temperature |
| CN103599793A (en) * | 2013-11-28 | 2014-02-26 | 天津市环境保护科学研究院 | Supported copper-manganese composite oxide catalyst capable of removing formaldehyde at room temperature and preparation method |
| CN106076320A (en) * | 2016-06-12 | 2016-11-09 | 常州大学 | A kind of preparation method of the manganese oxide nanometer sheet for processing waste gas |
| CN106378211A (en) * | 2016-08-29 | 2017-02-08 | 天津大学 | Preparation, regeneration and application of catalyst for oxidation of volatile organic compounds |
| CN106492809A (en) * | 2016-11-18 | 2017-03-15 | 南京工程学院 | A kind of for removing new catalyst of formaldehyde and preparation method thereof |
Non-Patent Citations (5)
| Title |
|---|
| JIN, QIU ET AL.: ""Highly selective and stable PdNi catalyst derived from layered double hydroxides for partial hydrogenation of acetylene"", 《APPLIED CATALYSIS A-GENERAL》 * |
| LAMONIER, JF ET AL.: ""Catalytic removal of toluene in air over Co-Mn-Al nano-oxides synthesized by hydrotalcite route"", 《CATALYSIS LETTERS》 * |
| R.DULA ET AL.: ""Mn-containing catalytic materials for the total combustion of toluene:The role of Mn localisation in the structure of LDH precursor"", 《CATALYSIS TODAY》 * |
| 潘国祥等: "层状前驱体法制备Cu-MnO双功能催化剂及其气相耦合加氢合成苯甲醛", 《硅酸盐学报》 * |
| 莫胜鹏: ""含钴锰基水滑石衍生复合氧化物的制备及其催化氧化VOCs性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790396A (en) * | 2020-06-15 | 2020-10-20 | 北京化工大学 | Method for preparing p-n type in-situ symbiotic heterojunction material by pyrolysis of nickel-manganese hydrotalcite topological transformation and application |
| CN111790396B (en) * | 2020-06-15 | 2023-03-21 | 北京化工大学 | Method for preparing p-n type in-situ symbiotic heterojunction material by pyrolysis of nickel-manganese hydrotalcite topological transformation and application |
| CN113061932A (en) * | 2020-11-20 | 2021-07-02 | 北京大学深圳研究生院 | Catalyst and application thereof |
| CN112619640A (en) * | 2020-12-14 | 2021-04-09 | 陕西科技大学 | Active manganese formaldehyde degradation material and preparation and application thereof |
| CN115739113A (en) * | 2022-11-23 | 2023-03-07 | 大气(广东)科技发展有限公司 | Catalyst for catalyzing formaldehyde at room temperature and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109939692A (en) | A kind of manganese oxide catalyst and its preparation method and application | |
| CN107029702B (en) | Manganese oxide-loaded carbon fiber felt catalyst material and preparation method and application thereof | |
| CN108435160B (en) | Cerium-manganese catalyst for decomposing ozone at wide temperature and high airspeed, preparation method and application | |
| CN102600861B (en) | For the manganese base composite oxidate Catalysts and its preparation method of catalytic decomposition ozone | |
| CN104667916B (en) | Method for preparing catalytic wet oxidation catalyst | |
| CN110653004A (en) | Catalyst for trapping and catalyzing VOCs degradation and preparation method and application thereof | |
| CN107697952A (en) | For removing preparation method of manganese bioxide material of low concentration formaldehyde and products thereof and application in air | |
| US11247197B1 (en) | Core-shell structured catalyst, preparation method thereof and method for treating industrial tail gas | |
| CN108855124A (en) | A method of SCR denitration is prepared with manganese ore using steel-making sintering ash | |
| CN109675556A (en) | A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning | |
| CN110665502A (en) | Monoatomic Ag-based catalyst, preparation thereof and application thereof in catalytic oxidation of formaldehyde | |
| CN112473665A (en) | Supported silver-manganese catalyst and preparation method and application thereof | |
| CN109482213A (en) | A kind of Bi/ (BiO)2CO3The preparation method of nanometer flower ball-shaped photochemical catalyst | |
| CN115106086A (en) | Preparation method of double-defect ferronickel hydrotalcite photocatalyst, product and application thereof | |
| CN101279238A (en) | Purificant for adsorbing formaldehyde and method of preparing the same | |
| CN110711579A (en) | Silver-manganese catalyst for decomposing ozone, preparation method and application thereof | |
| CN107413328A (en) | A kind of area load type material for air purification and preparation method thereof | |
| CN115676896B (en) | Amorphous manganese oxide composite material and preparation method and application thereof | |
| CN110124710A (en) | A kind of NEW TYPE OF COMPOSITE metal oxide catalyst and preparation method thereof | |
| CN105709737B (en) | Catalytic wet oxidation catalyst and its preparation method | |
| CN113070081A (en) | Porous zirconium phosphate based monatomic catalyst for removing formaldehyde and preparation method thereof | |
| CN103272612A (en) | Preparation method of room-temperature ozone-removing catalyst | |
| CN114471146B (en) | Green and odorless formaldehyde scavenger and preparation method thereof | |
| CN113731402B (en) | Catalyst and preparation method and application thereof | |
| CN109012161A (en) | A kind of material for air purification and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190628 |
|
| RJ01 | Rejection of invention patent application after publication |