CN105327697A - Method for preparing manganese dioxide catalyst for normal-temperature low-concentration NO catalytic purification with ultrasonic assisted alcohol-water solution method - Google Patents
Method for preparing manganese dioxide catalyst for normal-temperature low-concentration NO catalytic purification with ultrasonic assisted alcohol-water solution method Download PDFInfo
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- CN105327697A CN105327697A CN201510797351.4A CN201510797351A CN105327697A CN 105327697 A CN105327697 A CN 105327697A CN 201510797351 A CN201510797351 A CN 201510797351A CN 105327697 A CN105327697 A CN 105327697A
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Abstract
The invention relates to a method for preparing a manganese dioxide catalyst for normal-temperature low-concentration NO catalytic purification with an ultrasonic assisted alcohol-water solution method. According to the method, a mixed solution formed through mixing of a potassium permanganate solution and alcohol is subjected to ultrasonic treatment for 10-60 min, solid-liquid separation is performed, acquired solids are dried, and the nano-manganese dioxide catalyst is prepared. According to the method, the ultrasonic assisted alcohol-water solution oxidation-reduction method is adopted to prepare the nano-manganese dioxide catalyst, the alcohol is taken as a raw material, and the cost is low; the oxidation-reduction method is adopted, and the operation is simple and convenient; by means of the ultrasonic treatment, not only is the NO removal performance remarkably improved, but also the preparation time is greatly shortened; the catalyst prepared with the method has excellent catalytic performance, and 100% NO removal rate can be kept for longer than 5 h under the fixed test condition.
Description
Technical field
The present invention relates to a kind of preparation method of the low concentration nitric oxide catalytic purification catalyst for hemi-closure space, belong to catalysis material technical field.
Background technology
Nitrogen oxide NOx (mainly refers to NO and NO
2) be the extremely strong atmosphere pollution of harmfulness, have a direct impact the formation of photochemical fog, acid rain, heavy damage ecological environment.In addition, nitrogen oxide also can cause the generation of the breathing problems such as lung cancer, threatens human body healthy.
For expanding urban capacity and alleviating traffic pressure, tunnel, underground parking etc. be enlarging constantly, and these hemi-closure space air circulation are poor, and motor-vehicle tail-gas is trapped in the inside becomes pollutant intensively.Its major pollutants nitrogen oxide NOx (NO accounts for more than 90%) concentration is up to several ppm, even tens of ppm, (<0.05ppm is required far above China's ambient air quality, GB3095-2012), cause serious threat to related personnel is healthy, therefore the improvement of normal temperature low concentration of NO x is very urgent.
The catalyst that can be used for NO catalytic oxidation relates to NACF, molecular sieve, perovskite and transition metal oxide, and wherein the room-temperature catalytic oxidation of transition metal oxide to NO is had outstanding performance.The oxide of occurring in nature manganese has 30 kinds of different crystal structures at least, and the oxide structure primitive of manganese is MnO
6octahedron, the difference of the variation of manganese element valence state and structural motif arrangement result in the diversity of the oxide of manganese.Mn oxide is as a kind of functional material, due to its abundance, cheap, advantages of environment protection, in oxidation, catalysis, electrochemistry, absorption and magnetics etc., show much special physics and chemistry character, be thus often used as ion sieve, molecular sieve, catalysis material, battery material and super paramagnetic material etc.Existing bibliographical information Mn oxide has performance in catalytic purification of nitroxide, but there is the problem that the life-span is short, catalytic efficiency is low.And the existing method preparing NO catalytic purification manganese dioxide-catalyst is comparatively complicated, consuming time longer, and obtained catalyst performance is not good, and catalytic life is short.
Summary of the invention
For the problems referred to above, the present invention is intended to solve the technical bottleneck that existing normal temperature low concentration nitric oxide catalyst for catalytic oxidation preparation efficiency is low, catalytic life is short.
The invention provides a kind of preparation method of normal temperature low concentration nitric oxide (NO) catalytic purification nanometer titanium dioxide Mn catalyst, the ultrasonic process of mixed solution liquor potassic permanganate and alcohol mixed is after 10 ~ 60 minutes, Separation of Solid and Liquid, gained solid is dried, i.e. obtained described nanometer titanium dioxide Mn catalyst.Wherein ultrasonic treatment temperature is preferably 20 ~ 40 DEG C.
The present invention adopts ultrasonic wave added alcohol solution oxidation-reduction method to prepare nanocatalyst manganese dioxide, take alcohol as raw material, with low cost; Adopt oxidation-reduction method, easy and simple to handle; Ultrasonic process not only significantly improves NO and removes performance, and greatly shortens preparation time; And the catalyst to be prepared by method of the present invention has superior catalytic performance, under fixing test condition, 100%NO removal efficiency can maintain more than 5h.
Preferably, the concentration of described liquor potassic permanganate is greater than 0.1mol/L and is below 1mol/L, is preferably between 0.5mol/L to 1mol/L.
Preferably, described alcohol is at least one in methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, glycerine, n-butanol.
Preferably, the ratio of the amount of substance of potassium permanganate and alcohol is between 1:5 to 1:15.
Preferably, ultrasonic time, between 10 to 60 minutes, is preferably between 20 to 40 minutes.
Preferably, bake out temperature, between 60 DEG C to 120 DEG C, is preferably between 80 DEG C to 100 DEG C.
Preferably, drying time, between 8 hours to 24 hours, is preferably between 8 hours to 16 hours.
The present invention also provides the normal temperature low concentration nitric oxide catalytic purification nanometer titanium dioxide prepared by above-mentioned preparation method Mn catalyst, and described nanometer titanium dioxide Mn catalyst is weak crystallization petal-shaped, and specific area is 66m
2/ g, aperture is 40 ~ 120nm, and pore volume is 10.3cm
3/ g.
Described nanometer titanium dioxide Mn catalyst can maintain more than 5 hours to 100% catalytic purification of NO at 25 ± 10 DEG C.
Accompanying drawing explanation
Fig. 1: the XRD diffraction pattern of manganese dioxide prepared by ultrasonic wave added alcohol-water dissolving (ultrasonic 20min);
Fig. 2: the SEM photo of manganese dioxide prepared by ultrasonic wave added alcohol-water dissolving (ultrasonic 20min);
Fig. 3: TEM, HR-TEM photo of manganese dioxide prepared by ultrasonic wave added alcohol-water dissolving (ultrasonic 20min);
Fig. 4: the specific area of manganese dioxide prepared by ultrasonic wave added alcohol-water dissolving (ultrasonic 20min) and graph of pore diameter distribution;
Fig. 5: manganese dioxide removing performance test curve and exporting tail gas on-line monitoring curve for normal temperature low concentration of NO prepared by ultrasonic wave added alcohol-water dissolving (ultrasonic 20min), test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, probe temperature is 25 ± 10 DEG C, and wherein the curve of the top represents the removal efficiency of NO over time;
Fig. 6: the NO of the manganese dioxide prepared under the different ultrasonic time condition of ultrasonic wave added alcohol-water dissolving removes performance test curve wherein, and UST-0, UST-20, UST-40, UST-60 represent that ultrasonic time is 0min, 20min respectively, 40min, 60min, test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
- 1h
-1, reaction temperature is 25 ± 10 DEG C;
Fig. 7: the NO of the manganese dioxide prepared under the different potassium permanganate concentration conditions of ultrasonic wave added alcohol-water dissolving removes performance test curve, and test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, reaction temperature is 25 ± 10 DEG C;
Fig. 8: the NO of the manganese dioxide prepared under the different drying time condition of ultrasonic wave added alcohol-water dissolving removes performance test curve, and in figure, dry-8h, dry-14h, dry-24h represent that drying time is respectively 8h respectively, 14h, 24h, test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, reaction temperature is 25 ± 10 DEG C;
Fig. 9: the NO of the manganese dioxide prepared under the different ultrasonic temperature condition of ultrasonic wave added alcohol-water dissolving removes performance test curve, and in figure, T-20, T-30, T-40 represent that ultrasonic temperature is 20 DEG C, 30 DEG C, 40 DEG C respectively, and test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, reaction temperature is 25 ± 10 DEG C;
Figure 10: the NO of the manganese dioxide prepared under the different bake out temperature condition of ultrasonic wave added alcohol-water dissolving removes performance test curve, in figure, dry-80, dry-120, dry-160 represent that bake out temperature is 80 DEG C, 120 DEG C, 160 DEG C respectively, and test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, reaction temperature is 25 ± 10 DEG C;
Figure 11: the NO of the manganese dioxide prepared under the different PH condition of ultrasonic wave added alcohol-water dissolving removes performance test curve, and test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, reaction temperature is 25 ± 10 DEG C.
Detailed description of the invention
Further illustrate the present invention below in conjunction with accompanying drawing and following embodiment, should be understood that accompanying drawing and following embodiment are only for illustration of the present invention, and unrestricted the present invention.
In the preparation method of numerous Mn oxide, the present invention chooses oxidation-reduction method simply and easily, by regulating material composition, technological parameter, introduce ultrasonic process, the quick preparation to Mn oxide can be realized, and the performance that removes of its normal temperature low concentration of NO is significantly increased, the NO removal efficiency of 100% can maintain more than 5h.The invention provides a kind of preparation method-ultrasonic wave added alcohol solution oxidation-reduction method of normal temperature low concentration nitric oxide (NO) catalytic purification nanocatalyst manganese dioxide.Specifically, with potassium permanganate, alcohol for raw material, after ultrasonic process, suction filtration, washing, oven dry obtain manganese dioxide.In one example, certain density liquor potassic permanganate is added drop-wise in alcohol, ultrasonic process certain hour, suction filtration, washing, suitable temperature interval dry certain hour, grinding obtain nano-manganese dioxide powder.
Described liquor potassic permanganate is preferably potassium permanganate solution, and concentration can between 0.1mol/L to 1mol/L.Concentration is not when this scope, and obtained manganese dioxide catalytic performance is more weak.Concentration is too low, and specific yield is less, cost is high, excessive concentration, and during reaction, nucleation rate is too fast, and particle is more uneven, and under amorphous state, stability is poor.The PH of reaction system can be and is greater than 4 and is less than 9, is preferably 6 ~ 8, is more preferably 7.Alkali crossed by peracid can reduce catalyst performance, and gentle PH environment contributes to the realization of catalyst cleaning effect.
Described alcohol includes but not limited at least one in methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, glycerine, n-butanol, is preferably ethanol, because ethanol is cheap, environment friendly and pollution-free.
The ratio of the amount of substance in potassium permanganate and alcohol source between 1:5 to 1:15, can be preferably between 1:8 to 1:10.Too high too low, reactant reaction is incomplete, wastes raw material.
Ultrasonic temperature can be 20 ~ 40 DEG C.Ultrasonic time between 0 to 60 minutes, can be preferably between 10 to 60 minutes, is more preferably between 20 to 40 minutes, like this can with the manganese dioxide of the better catalytic performance of acquisition of shorter reaction time.If ultrasonic time is too short, only play sample dispersion effect, ultrasonic time is long, and tunnel structure may be caused to cave in, and reduces catalytic effect.
Bake out temperature between 60 DEG C to 120 DEG C, can be preferably 80 ~ 100 DEG C.Temperature is too low, and sample drying is insufficient, drying time is long, and temperature is too high, and sample crystallinity increases, and defect reduces, and catalytic reaction site is reduced, and catalytic performance reduces.
Drying time between 8h to 24h, can be preferably between 8h to 16h.Drying time is too short, and sample drying is insufficient, and drying time is long, increases time cost, reduces the hydrone content in duct, tunnel structure may be caused to cave in and reduce catalytic performance.
In addition, it should be understood that in the present invention, the hybrid mode of liquor potassic permanganate and alcohol is not limited to the mode shown in above-mentioned example, also alternate manner can be adopted such as alcohol to be dropped to liquor potassic permanganate medium.
The present invention can prepare the weak crystallization manganese dioxide-catalyst of petal-shaped fast by ultrasonic wave added alcohol-water dissolving.It has larger specific area (66m
2/ g) and less aperture (40 ~ 120nm), be beneficial to makings absorption and transmission, improve catalytic performance.
The nano-manganese dioxide powder of described gained is used for the catalytic oxidation of low concentration of NO, test condition is: NO concentration is 10ppm, O
2content is 21%, and carrier gas is N
2, air speed is 120,000mLg
-1h
-1, reaction temperature is 25 ± 10 DEG C.Test result shows that 100% catalytic purification of catalyst to NO can maintain more than 5h.Show that it has remarkable result to the removal of the low-concentration nitrogen oxide of the city such as underground parking, tunnel hemi-closure space.
The present invention adopts ultrasonic wave added alcohol solution oxidation-reduction method to prepare weak crystallization petal shaped nano manganese dioxide-catalyst fast, for the normal temperature low concentration nitric oxide catalytic purification of hemi-closure space.Preparation the method raw material of the present invention is simple, and with low cost, ultrasonic introducing shortens preparation time greatly, improves production efficiency, has good application, promotional value.
Exemplify embodiment below further to describe the present invention in detail.Should understand equally; following examples are only used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.The technological parameter etc. that following example is concrete is also only an example in OK range, and namely those skilled in the art can be done in suitable scope by explanation herein and select, and do not really want the concrete numerical value being defined in Examples below.
Embodiment one:
Take 1.58gKMnO
4be dissolved in 10mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, puts into 30 DEG C of ultrasonic reaction ponds ultrasonic 20 minutes, use deionized water filtering and washing after a period of time, is placed in 80 DEG C of baking ovens and dries 14h.The XRD diffraction pattern of the catalyst of preparation as shown in Figure 1, can find out that the MO of preparation is weak crystallization state, there is certain peak shape but whether obviously special, therefore kind belonging to it can not be differentiated completely, for this reason, we characterize with XRD after being calcined at a certain temperature by sample again, all consistent with PDF#44-0141 through the peak position of comparison sample, peak shape, show that sample is the MnO of Tetragonal
2.SEM photo as shown in Figure 2, can find out the cluster that the pattern of sample is made up of the petal-like manganese oxide sheet of slices, petal Numerous, provide catalytic reaction site, be conducive to makings transmission and absorption.As shown in Figure 3, can find out that electronic diffraction ring is very weak, surface sample is mainly unbodied for TEM, HRTEM photo, still has some lattice fringes in red block line show sample, and this shows that sample is weak crystallization shape, consistent with XRD result.The sample that unbodied sample is high relative to degree of crystallization has more defect, for catalytic reaction provides more avtive spot, thus improves catalytic activity.Specific area and pore size distribution curve as shown in Figure 4, specific area and pore-size distribution parameter as shown in table 1, the specific area of MO is 66m
2/ g.From figure, the N of sample
2adsorption/desorption isotherms is not the LangmuirIV type curve typically with hysteresis loop, shows that sample does not possess meso-hole structure.Graph of pore diameter distribution show sample has wider pore-size distribution.Except the most probable radius near 20nm, also there is bulk deposition hole in sample.Three-dimensional through hole structure is extremely conducive to makings transmission and absorption.The NO of catalyst removes performance curve and online tail gas is monitored as shown in Figure 5, can find out that sample has good removal effect to low concentration of NO.More than 80% clearance reaches 18h, and only 100% clearance just maintains 15h.Online tail gas monitoring display, whole test process experienced by absorption, oxidation, desorption three phases.First, in exit gas, can't detect the existence of any NO, show that NO can adsorb by MO completely.The NO exported afterwards
2concentration continues to increase, and outlet still can't detect the existence of any NO, describes MO and can adsorb NO completely and be NO by it catalytic oxidation
2.But MO is to NO
2adsorption capacity weaken gradually, this may be the cause because avtive spot is capped gradually.Finally, can NO be detected in outlet, its concentration increases along with the time and increases gradually, and along with outlet NO
2the successive increase of concentration, shows that MO declines to some extent to the adsorption capacity of NO and catalytic capability;
The specific area of manganese dioxide prepared by table 1 ultrasonic wave added alcohol-water dissolving (ultrasonic 20min) and pore-size distribution parameter
Embodiment two:
Take 1.58gKMnO respectively
4be dissolved in 10mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, and put into 30 DEG C of ultrasonic reaction ponds after a period of time ultrasonic, ultrasonic time is respectively 0min, 20min, 40min, 60min.Then use deionized water filtering and washing, be placed in 80 DEG C of baking ovens and dry 14h.The NO of prepared catalyst removes performance curve as shown in Figure 6, can find out, when ultrasonic time is 20min and 40min, can maintain more than 10 hours to 100% catalytic purification of NO.
Comparative example one:
Take 0.316g respectively, 1.58g, 3.16gKMnO
4be dissolved in 20mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol respectively and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, puts into 30 DEG C of ultrasonic 20min in ultrasonic reaction pond, use deionized water filtering and washing after a period of time, is placed in 80 DEG C of baking ovens and dries 14h.The NO of prepared catalyst removes performance curve as shown in Figure 7.Can find out, when liquor potassic permanganate concentration be 0.5mol/L and the ratio of the amount of substance of potassium permanganate and alcohol is 1:8.5 and liquor potassic permanganate concentration be 1mol/L and the ratio of the amount of substance of potassium permanganate and alcohol is 1:17 time, more than 5 hours can be maintained to 100% catalytic purification of NO, but when liquor potassic permanganate concentration is 0.1mol/L and the ratio of the amount of substance of potassium permanganate and alcohol is 1:1.7, obtained catalyst does not almost act on removing of NO.
Comparative example two:
Take 1.58gKMnO respectively
4be dissolved in 10mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, puts into 30 DEG C of ultrasonic 20min in ultrasonic reaction pond, use deionized water filtering and washing after a period of time, be placed in 80 DEG C of baking ovens to dry, drying time is respectively 8h, 14h, 24h, the NO of prepared catalyst removes performance curve as shown in Figure 8.Can find out, when drying time is 8h and 14h, compared with 24h, longer to holding time of 100% catalytic purification of NO.In addition, when experiment finds that drying time is 6h, sample drying is insufficient, does not have catalytic effect completely.
Comparative example three
Take 1.58gKMnO respectively
4be dissolved in 10mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, put into 20 DEG C, 30 DEG C, the 40 DEG C ultrasonic 20min in ultrasonic reaction pond after a period of time respectively, use deionized water filtering and washing, be placed in 80 DEG C of baking ovens and dry, drying time is 8h, and the NO of prepared catalyst removes performance curve as shown in Figure 9.Can find out that the purifying property impact of ultrasonic temperature on catalyst is little.
Comparative example four
Take 1.58gKMnO respectively
4be dissolved in 10mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, put into 30 DEG C of ultrasonic 20min in ultrasonic reaction pond after a period of time, use deionized water filtering and washing, bake out temperature is respectively 80 DEG C, 120 DEG C, 160 DEG C, drying time is 8h, and the NO of prepared catalyst removes performance curve as shown in Figure 10.As can be seen from the figure, the purifying property of sample 80 DEG C time is best.
Comparative example five
Take 1.58gKMnO respectively
4be dissolved in 10mlH
2in O, be placed in 40 DEG C of water-bath stirring and dissolving.Measure 10ml ethanol and put into wide-mouth bottle.By KMnO on magnetic stirring apparatus
4solution is added drop-wise in ethanol, drips after terminating, the nitric acid of one bottle of dropping 0.5ml1mol/L, and the potassium hydroxide of one bottle of dropping 0.5ml1mol/L, one bottle unchanged.Put into 30 DEG C of ultrasonic 20min in ultrasonic reaction pond after a period of time, use deionized water filtering and washing, bake out temperature is 80 DEG C, and drying time is 8h, and the NO of prepared catalyst removes performance curve as shown in Figure 11.As shown in the figure, regulated by pH value, the purifying property of catalyst has significant change, and alkali crossed by peracid can reduce catalyst performance, and gentle PH environment contributes to the realization of catalyst cleaning effect.
Method of testing: the NO normal temperature of manganese dioxide-catalyst removes performance to carry out in continuous flow reactor of fixed bed, the quartz ampoule of internal diameter 8mm is used as reactor, and material loading level is 0.1g, and reaction air inlet is: NO concentration ~ 10ppm, O
2concentration ~ 21%, carrier gas N
2, reaction temperature is room temperature, and air speed is 120,000mLh-1g-1, and reaction air inlet and the NO concentration in giving vent to anger are detected by ThermoFisher42i-LS type nitrogen-oxide analyzer, consistently online.
Claims (10)
1. the normal temperature low concentration nitric oxide catalytic purification preparation method of nanometer titanium dioxide Mn catalyst, it is characterized in that, the ultrasonic process of mixed solution liquor potassic permanganate and alcohol mixed is after 10 ~ 60 minutes, Separation of Solid and Liquid, gained solid is dried, i.e. obtained described nanometer titanium dioxide Mn catalyst.
2. preparation method according to claim 1, is characterized in that, the temperature of ultrasonic process is 20 ~ 40 DEG C.
3. preparation method according to claim 1 and 2, is characterized in that, the concentration of described liquor potassic permanganate is greater than 0.1mol/L and is below 1mol/L, is preferably between 0.5mol/L to 1mol/L.
4. preparation method according to any one of claim 1 to 3, is characterized in that, described alcohol is at least one in methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, glycerine, n-butanol.
5. preparation method according to any one of claim 1 to 4, is characterized in that, the ratio of the amount of substance of potassium permanganate and alcohol is between 1:5 to 1:15.
6. preparation method according to any one of claim 1 to 5, is characterized in that, ultrasonic time, between 0 to 60 minutes, is preferably between 10 to 60 minutes, is more preferably between 20 to 40 minutes.
7. preparation method according to any one of claim 1 to 6, is characterized in that, bake out temperature, between 60 DEG C to 120 DEG C, is preferably between 80 DEG C to 100 DEG C.
8. preparation method according to any one of claim 1 to 7, is characterized in that, drying time, between 8 hours to 24 hours, is preferably between 8 hours to 16 hours.
9. a normal temperature low concentration nitric oxide catalytic purification nanometer titanium dioxide Mn catalyst prepared by the preparation method according to any one of claim 1 to 8, it is characterized in that, described nanometer titanium dioxide Mn catalyst is weak crystallization petal-shaped, and specific area is 66m
2/ g, aperture is 40 ~ 120nm, and pore volume is 10.3cm
3/ g.
10. nanometer titanium dioxide Mn catalyst according to claim 9, is characterized in that, described nanometer titanium dioxide Mn catalyst can maintain more than 5 hours to 100% catalytic purification of NO at 25 ± 10 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867306A (en) * | 2017-12-05 | 2019-06-11 | 中国科学院大连化学物理研究所 | A kind of low temperature preparation method of meso-porous titanium dioxide manganese nanometer sheet |
| CN111020881A (en) * | 2019-12-09 | 2020-04-17 | 南京工业大学 | Preparation method of multifunctional synergistic hierarchical pore air purification membrane |
| CN111054322A (en) * | 2019-10-30 | 2020-04-24 | 齐利华(武汉)资源环境科技有限公司 | Catalyst for VOCs catalytic combustion and preparation method thereof |
| CN112023918A (en) * | 2020-09-22 | 2020-12-04 | 华中科技大学 | Transition metal in-situ doped manganese-based catalyst and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040097738A (en) * | 2003-05-13 | 2004-11-18 | 코아텍주식회사 | Mn oxide catalyst for decomposing ozone and the method therefor |
| CN103212245A (en) * | 2013-04-25 | 2013-07-24 | 福州大学 | Dedusting filter material containing MnO2 catalyst, and preparation method and application thereof |
| CN103803653A (en) * | 2014-02-27 | 2014-05-21 | 广西师范大学 | Porous nano manganese dioxide, porous nano manganese dioxide-based doped material and preparation method thereof |
| CN104258845A (en) * | 2014-09-17 | 2015-01-07 | 中国科学院上海硅酸盐研究所 | Amorphous manganese oxide and preparation method thereof |
-
2015
- 2015-11-18 CN CN201510797351.4A patent/CN105327697A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040097738A (en) * | 2003-05-13 | 2004-11-18 | 코아텍주식회사 | Mn oxide catalyst for decomposing ozone and the method therefor |
| CN103212245A (en) * | 2013-04-25 | 2013-07-24 | 福州大学 | Dedusting filter material containing MnO2 catalyst, and preparation method and application thereof |
| CN103803653A (en) * | 2014-02-27 | 2014-05-21 | 广西师范大学 | Porous nano manganese dioxide, porous nano manganese dioxide-based doped material and preparation method thereof |
| CN104258845A (en) * | 2014-09-17 | 2015-01-07 | 中国科学院上海硅酸盐研究所 | Amorphous manganese oxide and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| MASAKI IWATANI ET AL.: "Sonochemical Reduction of Potssium Permanganate Solution and Preparation of Manganese Dioxide Nanoparticles", 《PROCEEDINGS OF THE ANNUAL MEETING OF THE JAPEN SOCIETY OF SONOCHEMISTRY》 * |
| NILESH R. CHODANKAR ET AL.: "Alcohol mediated growth of a-MnO2 thin films from KMnO4 precursor for high performance supercapacitors", 《RSC ADV.》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867306A (en) * | 2017-12-05 | 2019-06-11 | 中国科学院大连化学物理研究所 | A kind of low temperature preparation method of meso-porous titanium dioxide manganese nanometer sheet |
| CN109867306B (en) * | 2017-12-05 | 2022-02-15 | 中国科学院大连化学物理研究所 | Low-temperature preparation method of mesoporous manganese dioxide nanosheets |
| CN111054322A (en) * | 2019-10-30 | 2020-04-24 | 齐利华(武汉)资源环境科技有限公司 | Catalyst for VOCs catalytic combustion and preparation method thereof |
| CN111020881A (en) * | 2019-12-09 | 2020-04-17 | 南京工业大学 | Preparation method of multifunctional synergistic hierarchical pore air purification membrane |
| CN112023918A (en) * | 2020-09-22 | 2020-12-04 | 华中科技大学 | Transition metal in-situ doped manganese-based catalyst and preparation method and application thereof |
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