CN105107494A - Activated carbon based nano TiO2 composite MnO2 catalytic material and preparation method therefor - Google Patents
Activated carbon based nano TiO2 composite MnO2 catalytic material and preparation method therefor Download PDFInfo
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- CN105107494A CN105107494A CN201510459891.1A CN201510459891A CN105107494A CN 105107494 A CN105107494 A CN 105107494A CN 201510459891 A CN201510459891 A CN 201510459891A CN 105107494 A CN105107494 A CN 105107494A
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Abstract
The invention discloses an activated carbon based nano TiO2 composite MnO2 catalytic material. The material comprises honeycomb rectangular blocks, honeycomb circular blocks, honeycomb hexagonal blocks, honeycomb holes, triangular strips, semi-circular strips, Ti/Mn coatings and honeycomb fiber meshes. A preparation method for the catalytic material comprises: substrate activation; nano titanium preparation; titanium spraying; manganese spraying; chemical deposition ; and post-treatment. By taking honeycomb activated carbon as a carrier, manganese dioxide and nano titanium dioxide as a compound catalyst is loaded on the honeycomb activated carbon to prepare a catalytic block or a fiber mesh for air purification and treatment; manganese dioxide is attached to the surfaces of nano TiO2 particles by virtue of a chemical deposition method to form a composite material. The preparation process disclosed by the invention is short in flow and easy to control. The obtained composite catalytic material has high catalytic activity, can be used for treating total volatile organic compounds (TVOC) in low concentration indoor air at normal temperature and can be used for treating high concentration industrial organic waste gas in a temperature range of 70-120 DEG C.
Description
Technical field
The present invention relates to a kind of absorbent charcoal based air catalytic scavenging material technical equipment field, the particularly absorbent charcoal based nano-TiO of one
2compound MnO
2catalysis material and preparation method thereof.
Background technology
The present invention relates to one catalysis material based on nano titanium oxide, manganese dioxide is attached to nano-TiO with the method for chemical deposition
2compound catalyze material of particle surface composition and preparation method thereof, is specially adapted to the catalysis material preparation of indoor and industrial waste gas improvement.
Research shows, in indoor environment, the level of pollution of majority of organic pollutants is outdoor several times, sometimes even up to hundred times of orders of magnitude; And modern the average time spent in indoor accounts for 80%-90% usually, also just due to the pollution concentration exposure level that the mankind are higher in indoor, so IAQ and human body are more closely related, also more purification of air enterprise paid close attention to; All have chemical toxicity as air pollutants great majority, form potential harm to health, therefore research and develop efficient, long-acting material for air purification, removing volatile organic matter in air is very important problem.
In prior art, ventilation, filtration method, absorption method, photocatalytic degradation method are mainly contained to the purification techniques of pollutants in air; First three methods existence office phase property, not to organic pollutant degradation and detoxification function, and Photocatalyst utilizes TiO
2photocatalysis characteristic, degradation-detoxification is carried out to the organic pollution in air; Due to nano-TiO
2particle chemical stability is high, cost is low, as catalysis material, has that oxidisability is strong, degradation efficiency is high, nontoxic and advantages such as non-secondary pollution simultaneously, boundless in the prospect of environmental pollution improvement and new forms of energy application.But, nano-TiO
2photochemical catalyst photon utilization rate in course of reaction is low, electron hole commute compound; Nano particle diameter is little, easily reunite; Specific area is little, poor to contaminant molecule absorption property; In dynamic fluid, difficulty reclaims, easily loses, and causes the problems such as dust pollution.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of absorbent charcoal based nano-TiO
2compound MnO
2catalysis material and preparation method thereof, for deficiency of the prior art, considers from the practical application angle of waste gas pollution control and treatment, adopts cellular activated carbon block or carbon fibre web as base material, by nano-TiO
2particle and MnO
2carry out load and prepare compound catalyze material, improve its catalytic performance, with pure nano-TiO
2particle Phase ratio, catalysis material based on superfine titanic oxide, manganese dioxide is attached to nano-TiO with the method for chemical deposition
2the compound catalyze material catalytic activity of particle surface composition is high, preparation technology's flow process is short, be easy to control, compound catalyze material has that oxidisability is strong, degradation efficiency is high, nontoxic and advantages such as non-secondary pollution, has a extensive future in environmental pollution improvement and new forms of energy application; Solve common nano-TiO
2photochemical catalyst photon utilization rate in course of reaction is low, little, the easy reunion of electron hole commute compound, nano particle diameter, problem that specific area is little, good to organic pollutant molecule absorption property.
For achieving the above object, technical scheme of the present invention is as follows: a kind of absorbent charcoal based nano-TiO
2compound MnO
2catalysis material, comprises honeycomb rectangular block, honeycomb circular block, honeycomb six rib block, honeycomb hole, triangle striped, semicircle striped, Ti/Mn coating, cellular fibronectin net, it is characterized in that:
Described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block, by active carbon powder through press, compressing by rectangular mould, circular die and six rib moulds respectively, described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block cross section are abound with and are provided with equidistant square honeycomb hole, described honeycomb hole is arranged along described honeycomb rectangular block, honeycomb circular block and honeycomb six rib block axially extending bore; The inner side wall of described honeycomb hole is axially provided with triangle striped and semicircle striped, described triangle striped and the interlaced setting of semicircle striped along described honeycomb rectangular block, honeycomb circular block and honeycomb six rib block; The online honeycomb hole inside of described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block and cellular fibronectin is coated with Ti/Mn coating; Described Ti/Mn coating is covered at described triangle striped and semicircle striated surface.
Described cellular fibronectin net is individual layer or MULTILAYER COMPOSITE net.
The size range of the described honeycomb rectangular block length of side, honeycomb circular block diameter, honeycomb six rib block diameter is 30mm-1000mm.
The length range of described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block is 80mm-1000mm.
The size range of described honeycomb hole is 3mm-100mm.
Described triangle striped at least arranges one, and described semicircle striped at least arranges one.
A kind of absorbent charcoal based nano-TiO
2compound MnO
2the preparation method of catalysis material, comprises base material activation, nano-titanium preparation, titanium coating, manganese coating, chemical deposition, post processing, it is characterized in that:
1, base material activation, described base material refer in honeycomb rectangular block or honeycomb circular block or honeycomb six rib block or cellular fibronectin net any one; Choose base material, base material is loaded in container, add industrial alcohol in described container, make industrial alcohol soak described base material completely; Carry out forced circulation by circulating pump to the ethanol in container, the honeycomb hole of described base material is laterally placed, and flowing soak time is 30 minutes-120 minutes; The specific area of base material is greater than 500m
2/ g;
2, nano-titanium preparation, prepares anatase and rutile mixed type nano-titanium dioxide powder; Described titanium source is selected from the one in titanium tetrachloride, butyl titanate and tetraethyl titanate; Described acid is one in hydrochloric acid or nitric acid or its mixture; The weight concentration of hydrochloric acid is 35%-37%; The weight concentration of nitric acid is 60%-65%; In described solution, the volume fraction of each component is: titanium source 1%-5%, absolute ethyl alcohol 5%-45%, acid 35%-50%, and surplus is deionized water;
First be dissolved in hydrochloric acid and absolute ethyl alcohol mixed solvent in titanium source, then add nitric acid, make mixed liquor, carry out heating hydrolysis to mixed liquor, pyrolysis temperature is 80-120 degree; Static or the agitating heating time is 8 hours-16 hours; Thereafter neutrality is washed till by deionized water, then through washes of absolute alcohol, dry, obtain the anatase containing different proportion and rutile ore nano-titanium dioxide powder, the particle diameter≤100nm of described nano titanium oxide; TiO
2particle is anatase and rutile mixing crystal formation percentage by weight is 79:21, for subsequent use.
3, titanium coating, the nano titanium dioxide powder of preparation in optional step 2, adds deionized water for stirring in 20% (wt%) ratio and forms suspension, form unit for uniform suspension; Through the cellular activated carbon base material of industrial alcohol process in optional step 1, its specific area is greater than 500m
2/ g, is placed in suspension dipping and gets and dry after 20 minutes, for subsequent use;
4, manganese coating, according to titanium source and potassium permanganate mass ratio be, titanium source: potassium permanganate=(15-20): the ratio of 1, preparation liquor potassic permanganate, by cellular activated carbon base material obtained in step 3, immerse in liquor potassic permanganate, soak time is 20 minutes, dry after taking-up, for subsequent use;
5, chemical deposition, is loaded in airtight container by base material obtained in step 4, and at 450 DEG C of-550 DEG C of temperature, pass into nitrogen reduction, carry out regulable control to titanium dioxide crystalline phase ratio, in honeycomb hole, coating generates manganese dioxide simultaneously; Sedimentation time is 2 hours; The TiO of described deposited on substrates
2mass ratio is 85%-95%, and described manganese dioxide mass ratio is 5%-15%;
6, post processing, is cooled to room temperature by the base material in step 5, takes out, and adds appropriate amount of deionized water and rinses, to remove accessory substance potassium manganate, again carry out drying to base material, namely obtain required absorbent charcoal based nano-TiO
2compound MnO
2mass of catalytic material or fleece.
The object of this invention is to provide a kind of take cellular activated carbon as carrier, manganese dioxide and nano titanium oxide are prepared catalytic mass or fleece as composite catalyst load on cellular activated carbon be used for purification of air and administer; Preparation technology's flow process of the present invention is short, be easy to control, it is high that gained compound catalyze material has catalytic activity, the volatile organic contaminant (TVOC) in low concentration room air can be processed at normal temperatures, in 70 ~ 120 DEG C of temperature ranges, may be used for the improvement of high-concentration industrial organic exhaust gas.
Pass through technique scheme, the beneficial effect of technical solution of the present invention is: consider from the practical application angle of waste gas pollution control and treatment, adopt cellular activated carbon block or NACF net as base material, play the adsorption capacity of active carbon high-quality, active carbon has high specific area, to low concentration so that trace organic substance contaminant removal capacity is strong; Nano TiO 2 particles and MnO2 are carried out load and prepares compound catalyze material, improve its catalytic performance, compared with pure nano TiO 2 particles, catalysis material based on superfine titanic oxide, the compound catalyze material catalytic activity that manganese dioxide is attached to nano TiO 2 particles surface composition with the method for chemical deposition is high, preparation technology's flow process is short, be easy to control, compound catalyze material has that oxidisability is strong, degradation efficiency is high, nontoxic and advantages such as non-secondary pollution, has a extensive future in environmental pollution improvement and new forms of energy application; Solve that common nano-TiO2 photocatalyst photon utilization rate in course of reaction is low, little, the easy reunion of electron hole commute compound, nano particle diameter, problem that specific area is little, good to organic pollutant molecule absorption property.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the absorbent charcoal based nano-TiO of the one disclosed in the embodiment of the present invention
2compound MnO
2catalysis material rectangular block schematic cross-section;
Fig. 2 is the absorbent charcoal based nano-TiO of the one disclosed in the embodiment of the present invention
2compound MnO
2catalysis material circular block schematic cross-section;
Fig. 3 is the absorbent charcoal based nano-TiO of the one disclosed in the embodiment of the present invention
2compound MnO
2catalysis material six rib block schematic cross-section;
Fig. 4 is the absorbent charcoal based nano-TiO of the one disclosed in the embodiment of the present invention
2compound MnO
2catalysis material honeycomb hole schematic cross-section;
Fig. 5 is the absorbent charcoal based nano-TiO of the one disclosed in the embodiment of the present invention
2compound MnO
2catalysis material cellular material and preparation method thereof embodiment 1 schematic diagram;
Fig. 6 is the absorbent charcoal based nano-TiO of the one disclosed in the embodiment of the present invention
2compound MnO
2catalysis material cellular material and preparation method thereof embodiment 2 schematic diagram.
Numeral and the corresponding component title represented by letter in figure:
1. honeycomb rectangular block 2. honeycomb circular block 3. honeycomb six rib block 4. honeycomb hole
5. triangle striped 6. semicircle striped 7.Ti/Mn coating
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
According to according to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the invention provides a kind of absorbent charcoal based nano-TiO
2compound MnO
2catalysis material, comprises honeycomb rectangular block 1, honeycomb circular block 2, honeycomb six rib block 3, honeycomb hole 4, triangle striped 5, semicircle striped 6, Ti/Mn coating 7, cellular fibronectin; It is characterized in that:
Described honeycomb rectangular block 1, honeycomb circular block 2, honeycomb six rib block 3, by active carbon powder through press, compressing by rectangular mould, circular die and six rib moulds respectively, described honeycomb rectangular block 1, honeycomb circular block 2, honeycomb six rib block 3 cross section are abound with and are provided with equidistant square honeycomb hole 4, described honeycomb hole 4 is arranged along described honeycomb rectangular block 1, honeycomb circular block 2 and honeycomb six rib block 3 axially extending bore; The inner side wall of described honeycomb hole 4 is axially provided with triangle striped 5 and semicircle striped 6, described triangle striped 5 and the interlaced setting of semicircle striped 6 along described honeycomb rectangular block 1, honeycomb circular block 2 and honeycomb six rib block 3; Online honeycomb hole 4 inside of described honeycomb rectangular block 1, honeycomb circular block 2, honeycomb six rib block 3 and cellular fibronectin is coated with Ti/Mn coating; Described Ti/Mn coating is covered on described triangle striped 5 and semicircle striped 6 surface.
Described cellular fibronectin net is monolayer net.
The size range of described honeycomb rectangular block 1 length of side, honeycomb circular block 2 diameter, honeycomb six rib block 3 diameter is 60mm-800mm.
The length range of described honeycomb rectangular block 1, honeycomb circular block 2, honeycomb six rib block 3 is 120mm-800mm.
The size range of described honeycomb hole 4 is 8mm-70mm.
Described triangle striped 5 at least arranges one, and described semicircle striped 6 at least arranges one.
A kind of absorbent charcoal based nano-TiO
2compound MnO
2the preparation method of catalysis material, comprises base material activation, nano-titanium preparation, titanium coating, manganese coating, chemical deposition, post processing, it is characterized in that:
1, base material activation, described base material refer in honeycomb rectangular block 1 or honeycomb circular block 2 or honeycomb six rib block 3 or cellular fibronectin net any one; Choose base material, base material is loaded in container, add industrial alcohol in described container, make industrial alcohol soak described base material completely; Carry out forced circulation by circulating pump to the ethanol in container, the honeycomb hole of described base material is laterally placed, and flowing soak time is 30 minutes-100 minutes; The specific area of base material is greater than 500m
2/ g;
2, nano-titanium preparation, prepares anatase and rutile mixed type nano-titanium dioxide powder; Described titanium source is selected from the one in titanium tetrachloride, butyl titanate and tetraethyl titanate; Described acid is one in hydrochloric acid or nitric acid or its mixture; The weight concentration of hydrochloric acid is 35%-37%; The weight concentration of nitric acid is 60%-65%; In described solution, the volume fraction of each component is: titanium source 1%-5%, absolute ethyl alcohol 5%-45%, acid 35%-50%, and surplus is deionized water;
First be dissolved in hydrochloric acid and absolute ethyl alcohol mixed solvent in titanium source, then add nitric acid, make mixed liquor, carry out heating hydrolysis to mixed liquor, pyrolysis temperature is 80-120 degree; Static or the agitating heating time is 8 hours-14 hours; Thereafter neutrality is washed till by deionized water, then through washes of absolute alcohol, dry, obtain the anatase containing different proportion and rutile ore nano-titanium dioxide powder, the particle diameter≤80nm of described nano titanium oxide; TiO
2particle is anatase and rutile mixing crystal formation percentage by weight is 79:21, for subsequent use.
3, titanium coating, the nano titanium dioxide powder of preparation in optional step 2, adds deionized water for stirring in 20% (wt%) ratio and forms suspension, form unit for uniform suspension; Through the cellular activated carbon base material of industrial alcohol process in optional step 1, its specific area is greater than 500m
2/ g, is placed in suspension dipping and gets and dry after 20 minutes, for subsequent use;
4, manganese coating, according to titanium source and potassium permanganate mass ratio be, titanium source: potassium permanganate=(15-20): the ratio of 1, preparation liquor potassic permanganate, by cellular activated carbon base material obtained in step 3, immerse in liquor potassic permanganate, soak time is 20 minutes, dry after taking-up, for subsequent use;
5, chemical deposition, is loaded in airtight container by base material obtained in step 4, and at 450 DEG C of-550 DEG C of temperature, pass into nitrogen reduction, carry out regulable control to titanium dioxide crystalline phase ratio, in honeycomb hole, coating generates manganese dioxide simultaneously; Sedimentation time is 2 hours; The TiO of described deposited on substrates
2mass ratio is 85%-95%, and described manganese dioxide mass ratio is 5%-15%;
6, post processing, is cooled to room temperature by the base material in step 5, takes out, and adds appropriate amount of deionized water and rinses, to remove accessory substance potassium manganate, again carry out drying to base material, namely obtain required absorbent charcoal based nano-TiO
2compound MnO
2mass of catalytic material or fleece.
Specific embodiment 1: according to Fig. 5
Under normal temperature 25 DEG C of conditions, prepared compound catalyze material is applied to the indoor toluene gas of degraded low concentration, degrades under UV-irradiation.Sample at set intervals once, detect toluene gas concentration.As shown in Figure 5, compound catalyze material provided by the invention can process the indoor toluene gas of low concentration at normal temperatures.Before degraded in 30min, degradation of toluene rate rises rapidly, and after to 60min, degradation of toluene rate reaches more than 90%, 90min, toluene concentration can't detect substantially, and degradation of toluene rate can reach 98%.Compound catalyze material provided by the invention has excellent catalytic effect at normal temperatures thus.
Specific embodiment 2: according to Fig. 6
Under 80 DEG C of temperature conditions, prepared compound catalyze material is applied to and administers high-concentration industrial toluene gas, degrade under UV-irradiation.Sample at set intervals once, detect toluene gas concentration.As shown in Figure 6, can efficient degradation high concentration toluene gas at 80 DEG C of temperature.Before degraded in 60min, degradation of toluene rate rises rapidly, and to 80 ~ 90min, after degradation of toluene rate reaches more than 85%, 90min, degradation of toluene rate remains unchanged substantially, and degradation of toluene rate can reach 90%.Compound catalyze material provided by the invention at high temperature has excellent catalytic degradation effect to high concentration toluene thus.
By above-mentioned specific embodiment, the invention has the beneficial effects as follows: consider from the practical application angle of waste gas pollution control and treatment, adopt cellular activated carbon block or NACF net as base material, play the adsorption capacity of active carbon high-quality, active carbon has high specific area, to low concentration so that trace organic substance contaminant removal capacity is strong; By nano-TiO
2particle and MnO
2carry out load and prepare compound catalyze material, improve its catalytic performance, with pure nano-TiO
2particle Phase ratio, catalysis material based on superfine titanic oxide, manganese dioxide is attached to nano-TiO with the method for chemical deposition
2the compound catalyze material catalytic activity of particle surface composition is high, preparation technology's flow process is short, be easy to control, compound catalyze material has that oxidisability is strong, degradation efficiency is high, nontoxic and advantages such as non-secondary pollution, has a extensive future in environmental pollution improvement and new forms of energy application; Solve common nano-TiO
2photochemical catalyst photon utilization rate in course of reaction is low, little, the easy reunion of electron hole commute compound, nano particle diameter, problem that specific area is little, good to organic pollutant molecule absorption property.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an absorbent charcoal based nano-TiO
2compound MnO
2catalysis material, is characterized in that, comprises honeycomb rectangular block, honeycomb circular block, honeycomb six rib block, honeycomb hole, triangle striped, semicircle striped, Ti/Mn coating, cellular fibronectin net; Described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block, by active carbon powder through press, compressing by rectangular mould, circular die and six rib moulds respectively, described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block cross section are abound with and are provided with equidistant square honeycomb hole, described honeycomb hole is arranged along described honeycomb rectangular block, honeycomb circular block and honeycomb six rib block axially extending bore; The inner side wall of described honeycomb hole is axially provided with triangle striped and semicircle striped, described triangle striped and the interlaced setting of semicircle striped along described honeycomb rectangular block, honeycomb circular block and honeycomb six rib block; The online honeycomb hole inside of described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block and cellular fibronectin is coated with Ti/Mn coating; Described Ti/Mn coating is covered at described triangle striped and semicircle striated surface.
2. the absorbent charcoal based nano-TiO of one according to claim 1
2compound MnO
2catalysis material, is characterized in that, described cellular fibronectin net is individual layer or MULTILAYER COMPOSITE net.
3. the absorbent charcoal based nano-TiO of one according to claim 1
2compound MnO
2catalysis material, is characterized in that, the size range of the described honeycomb rectangular block length of side, honeycomb circular block diameter, honeycomb six rib block diameter is 30mm-1000mm.
4. the absorbent charcoal based nano-TiO of one according to claim 1
2compound MnO
2catalysis material, is characterized in that, the length range of described honeycomb rectangular block, honeycomb circular block, honeycomb six rib block is 80mm-1000mm.
5. the absorbent charcoal based nano-TiO of one according to claim 1
2compound MnO
2catalysis material, is characterized in that, the size range of described honeycomb hole is 3mm-100mm.
6. the absorbent charcoal based nano-TiO of one according to claim 1
2compound MnO
2catalysis material, is characterized in that, described triangle striped at least arranges one, and described semicircle striped at least arranges one.
7. an absorbent charcoal based nano-TiO
2compound MnO
2the preparation method of catalysis material, is characterized in that, comprises base material activation, nano-titanium preparation, titanium coating, manganese coating, chemical deposition, post processing;
7.1, base material activation, described base material refer in honeycomb rectangular block or honeycomb circular block or honeycomb six rib block or cellular fibronectin net any one; Choose base material, base material is loaded in container, add industrial alcohol in described container, make industrial alcohol soak described base material completely; Carry out forced circulation by circulating pump to the ethanol in container, the honeycomb hole of described base material is laterally placed, and flowing soak time is 30 minutes-120 minutes; The specific area of base material is greater than 500m
2/ g;
7.2, nano-titanium preparation, prepares anatase and rutile mixed type nano-titanium dioxide powder; Described titanium source is selected from the one in titanium tetrachloride, butyl titanate and tetraethyl titanate; Described acid is one in hydrochloric acid or nitric acid or its mixture; The weight concentration of hydrochloric acid is 35%-37%; The weight concentration of nitric acid is 60%-65%; In described solution, the volume fraction of each component is: titanium source 1%-5%, absolute ethyl alcohol 5%-45%, acid 35%-50%, and surplus is deionized water;
First be dissolved in hydrochloric acid and absolute ethyl alcohol mixed solvent in titanium source, then add nitric acid, make mixed liquor, carry out heating hydrolysis to mixed liquor, pyrolysis temperature is 80-120 degree; Static or the agitating heating time is 8 hours-16 hours; Thereafter neutrality is washed till by deionized water, then through washes of absolute alcohol, dry, obtain the anatase containing different proportion and rutile ore nano-titanium dioxide powder, the particle diameter≤100nm of described nano titanium oxide; TiO
2particle is anatase and rutile mixing crystal formation percentage by weight is 79:21, for subsequent use;
7.3, titanium coating, the nano titanium dioxide powder of preparation in optional step 2, adds deionized water for stirring in 20% (wt%) ratio and forms suspension, form unit for uniform suspension; Through the cellular activated carbon base material of industrial alcohol process in optional step 1, its specific area is greater than 500m
2/ g, is placed in suspension dipping and gets and dry after 20 minutes, for subsequent use;
7.4, manganese coating, according to titanium source and potassium permanganate mass ratio be, titanium source: potassium permanganate=(15-20): the ratio of 1, preparation liquor potassic permanganate, by cellular activated carbon base material obtained in step 3, immerse in liquor potassic permanganate, soak time is 20 minutes, dry after taking-up, for subsequent use;
7.5, chemical deposition, is loaded in airtight container by base material obtained in step 4, and at 450 DEG C of-550 DEG C of temperature, pass into nitrogen reduction, carry out regulable control to titanium dioxide crystalline phase ratio, in honeycomb hole, coating generates manganese dioxide simultaneously; Sedimentation time is 2 hours; The TiO of described deposited on substrates
2mass ratio is 85%-95%, and described manganese dioxide mass ratio is 5%-15%;
7.6, post processing, is cooled to room temperature by the base material in step 5, takes out, and adds appropriate amount of deionized water and rinses, to remove accessory substance potassium manganate, again carry out drying to base material, namely obtain required absorbent charcoal based nano-TiO
2compound MnO
2mass of catalytic material or fleece.
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| CN106964340A (en) * | 2017-03-03 | 2017-07-21 | 桐乡市恒诺环保工程有限公司 | Catalyst of xylene waste gas and preparation method thereof is handled for electrolysis |
| CN106964340B (en) * | 2017-03-03 | 2020-02-21 | 浙江恒诺环保科技有限公司 | Catalyst for treating xylene waste gas by electrolytic process and preparation method thereof |
| CN108854524A (en) * | 2018-07-04 | 2018-11-23 | 安徽省舒城华竹实业有限公司 | A kind of preparation method of the oxidation modification support type bamboo charcoal of adsorbable degradation of formaldehyde |
| CN111514883A (en) * | 2019-08-30 | 2020-08-11 | 南京林业大学 | Preparation method of carbon-based catalyst for indoor air purification |
| CN112964758A (en) * | 2021-01-29 | 2021-06-15 | 浙江大学 | Manganese dioxide nanosheet/titanium dioxide nanowire array composite resistance type sensor and preparation method and application thereof |
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