CN105842288B - A kind of porous gas sensing property nano material and preparation method thereof - Google Patents
A kind of porous gas sensing property nano material and preparation method thereof Download PDFInfo
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- CN105842288B CN105842288B CN201610162739.1A CN201610162739A CN105842288B CN 105842288 B CN105842288 B CN 105842288B CN 201610162739 A CN201610162739 A CN 201610162739A CN 105842288 B CN105842288 B CN 105842288B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The present invention provides a kind of porous gas sensing property nano materials and preparation method thereof.Preparation method is as follows：（1）Ascorbic acid, sodium Diacetate, dehydroactic acid sodium, glucose and distilled water are mixed and dissolved；（2）Heating reaction；（3）It is cooling, it is washed with distilled water and absolute ethyl alcohol after centrifugation；（4）Drying；（5）By dried object and N, the mixing dispersion of N dimethylformamides；（6）Nine water ferric nitrates and N, N dimethylformamide are mixed, are added drop-wise in above-mentioned dispersion liquid；（7）Dodecyl Hydroxypropyl phosphate ester glycine betaine, nano zine oxide, chitosan, water-based acrylic resin and acetic acid are added after ultrasound, continues ultrasound, it is still aging；（8）It centrifuges, is washed with water and ethyl alcohol；（9）Drying；（10）It is put into Muffle furnace and calcines to obtain the final product.The porous gas sensing property nano material of the present invention increases the susceptibility of acetone gas with the increase of its concentration, and gas sensing property is strong, while repeatable usability is good.
Description
Technical field
The present invention relates to gas sensing property Material Fields, and in particular to a kind of porous gas sensing property nano material and preparation method thereof.
Background technology
With the fast development of science and technology, the development of information technology has also obtained very fast raising, and sensor technology is exactly it
In one.In sensor technology, mainly there are semi-conducting material and ceramic material, especially ceramic material, as a kind of novel
Material, has obtained development at full speed in recent years, and very big ratio is occupied in sensitive material.Ceramic material sensitive to heat-humidity has can
By control preparation process come change material property, can with other materials convergent improvement performance, corrosion-resistant, wear-resistant, high temperature resistant,
The advantages that performance is stablized and is of low cost.And materialization of the nano material then with the novel and unique not available for traditional material
Can, such as small-size effect, skin effect, macroscopic quantum effect and quantum size effect.And porous air-sensitive nano material is then tied
The advantages of having closed ceramic material and nano material has wide development meaning and market prospects.
Invention content
Technical problems to be solved：The object of the present invention is to provide a kind of porous gas sensing property nano materials, to acetone gas
Susceptibility increase with the increase of its concentration, gas sensing property is strong, while repeatable usability is good.
Technical solution：A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：Ascorbic acid
0.1-0.3 parts, 10-20 parts of nine water ferric nitrate, 0.1-0.3 parts of sodium Diacetate, 0.1-0.2 parts of dehydroactic acid sodium, dodecyl hydroxyl
0.05-0.1 parts of propyl phosphate glycine betaine, 80-100 parts of N,N-dimethylformamide, 0.2-0.5 parts of nano zine oxide, grape
5-10 parts sugared, 0.1-0.3 parts of chitosan, 0.05-0.1 parts of water-based acrylic resin, 0.2-0.4 parts of acetic acid, absolute ethyl alcohol 80-
100 parts, 80-100 parts of distilled water.
It is further preferred that a kind of porous gas sensing property nano material, is prepared by following component with parts by weight：
0.15-0.25 parts of ascorbic acid, 12-18 parts of nine water ferric nitrate, 0.15-0.25 parts of sodium Diacetate, dehydroactic acid sodium 0.11-0.17
Part, 0.06-0.09 parts of dodecyl Hydroxypropyl phosphate ester glycine betaine, 65-75 parts of N,N-dimethylformamide, nano zine oxide
0.3-0.4 parts, 6-9 parts of glucose, 0.15-0.25 parts of chitosan, 0.06-0.09 parts of water-based acrylic resin, acetic acid 0.25-
0.35 part, 85-95 parts of absolute ethyl alcohol, 85-95 parts of distilled water.
The preparation method of above-mentioned porous gas sensing property nano material includes the following steps：
（1）Ascorbic acid, sodium Diacetate, dehydroactic acid sodium, glucose and distilled water are mixed 20 minutes and dissolved；
（2）It is put into reaction kettle, is reacted 5-6 hours at 150-170 DEG C of temperature；
（3）It is cooled to room temperature, 2-4 is washed with distilled water after being centrifuged at rotating speed 5000-8000rpm with centrifuge
After secondary upper liquid clarification is washed till with absolute ethyl alcohol；
（4）It is put into baking oven, is dried 11-13 hours at 75-90 DEG C of temperature；
（5）Dried object is mixed with 60-80 parts of n,N-Dimethylformamide, ultrasonic disperse 2 hours；
（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, above-mentioned dispersion liquid is slowly added drop-wise to
In；
（7）Remaining ingredient is added after 1-2 hours with Ultrasound Instrument ultrasound, continues ultrasound 1-2 hours, still aging 23-25 is small
When；
（8）It is centrifuged at rotating speed 5000-8000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；
（9）It is put into baking oven, is dried 11-13 hours at 75-90 DEG C of temperature；
（10）It is put into Muffle furnace, calcines 2-3 hours, be cooled to room temperature at 400-500 DEG C of temperature to obtain the final product.
It is further preferred that step（2）Middle temperature is 155-165 DEG C, and the reaction time is 5.5 hours.
It is further preferred that step（3）Middle rotating speed is 6000-7000rpm, and washing times are 3 times.
It is further preferred that step（4）Middle temperature is 80-85 DEG C, and the time is 12 hours.
It is further preferred that step（7）Middle first time ultrasonic time is 1.5 hours, and second of ultrasonic time is 1.5 small
When, digestion time is 24 hours.
It is further preferred that step（8）Middle rotating speed is 6000-7000rpm.
It is further preferred that step（9）Middle temperature is 80-85 DEG C, and the time is 12 hours.
It is further preferred that step（10）Middle temperature is 450 DEG C, and the calcination time is 2.5 hours.
Advantageous effect：The average pore size of the porous gas sensing property nano material of the present invention is in 7nm or so, to the quick of acetone gas
Perception is as follows, it may be seen that the present invention increases the susceptibility of acetone gas with the increase of its concentration, in 100ppm
6.6 are reached as high as to its gas sensitization degree under concentration, when concentration reaches 2000ppm, susceptibility highest can rise to 15.8, gas
Quick property is strong, while repeatable usability is good.
Specific implementation mode
Embodiment 1
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.1 part of ascorbic acid, nine water
10 parts of ferric nitrate, 0.1 part of sodium Diacetate, 0.1 part of dehydroactic acid sodium, 0.05 part of dodecyl Hydroxypropyl phosphate ester glycine betaine, N,
80 parts of dinethylformamide, 0.2 part of nano zine oxide, 5 parts of glucose, 0.1 part of chitosan, water-based acrylic resin 0.05
Part, 0.2 part of acetic acid, 80 parts of absolute ethyl alcohol, 80 parts of distilled water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）By ascorbic acid, sodium Diacetate, dehydroactic acid sodium,
Glucose and distilled water, which are mixed 20 minutes, to be dissolved；（2）It is put into reaction kettle, is reacted 5 hours at 150 DEG C of temperature；（3）It is cold
But to room temperature, upper layer is washed till with absolute ethyl alcohol after being washed with distilled water 2 times after being centrifuged at rotating speed 5000rpm with centrifuge
Liquid is clarified；（4）It is put into baking oven, is dried 11 hours at 75 DEG C of temperature；（5）Dried object and 60 parts of N,N-dimethylformamides are mixed
It closes, ultrasonic disperse 2 hours；（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise to above-mentioned
In dispersion liquid；（7）Remaining ingredient is added after 1-2 hours with Ultrasound Instrument ultrasound, continues ultrasound 1 hour, still aging 23 hours；
（8）It is centrifuged at rotating speed 5000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, in temperature
It is dried 11 hours at 75 DEG C；（10）It is put into Muffle furnace, calcines 2 hours, be cooled to room temperature at 400 DEG C of temperature to obtain the final product.
Embodiment 2
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.15 part of ascorbic acid, nine water
12 parts of ferric nitrate, 0.15 part of sodium Diacetate, 0.11 part of dehydroactic acid sodium, 0.06 part of dodecyl Hydroxypropyl phosphate ester glycine betaine,
65 parts of N,N-dimethylformamide, 0.3 part of nano zine oxide, 6 parts of glucose, 0.15 part of chitosan, water-based acrylic resin
0.06 part, 0.25 part of acetic acid, 85 parts of absolute ethyl alcohol, 85 parts of distilled water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）By ascorbic acid, sodium Diacetate, dehydroactic acid sodium,
Glucose and distilled water, which are mixed 20 minutes, to be dissolved；（2）It is put into reaction kettle, is reacted 5.5 hours at 155 DEG C of temperature；（3）
It is cooled to room temperature, is washed till with absolute ethyl alcohol after being washed with distilled water 3 times after being centrifuged at rotating speed 6000rpm with centrifuge
Layer liquid clarification；（4）It is put into baking oven, is dried 12 hours at 80 DEG C of temperature；（5）By dried object and 65 parts of N,N-dimethylformamides
Mixing, ultrasonic disperse 2 hours；（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise to
It states in dispersion liquid；（7）Remaining ingredient is added after 1.5 hours with Ultrasound Instrument ultrasound, continues ultrasound 1.5 hours, still aging 24 is small
When；（8）It is centrifuged at rotating speed 6000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, in temperature
It is dried 12 hours at 80 DEG C of degree；（10）It is put into Muffle furnace, calcines 2.5 hours, be cooled to room temperature at 450 DEG C of temperature to obtain the final product.
Embodiment 3
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.2 part of ascorbic acid, nine water
15 parts of ferric nitrate, 0.2 part of sodium Diacetate, 0.15 part of dehydroactic acid sodium, 0.75 part of dodecyl Hydroxypropyl phosphate ester glycine betaine, N,
90 parts of dinethylformamide, 0.35 part of nano zine oxide, 7.5 parts of glucose, 0.2 part of chitosan, water-based acrylic resin
0.07 part, 0.3 part of acetic acid, 90 parts of absolute ethyl alcohol, 90 parts of distilled water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）By ascorbic acid, sodium Diacetate, dehydroactic acid sodium,
Glucose and distilled water, which are mixed 20 minutes, to be dissolved；（2）It is put into reaction kettle, is reacted 5.5 hours at 160 DEG C of temperature；（3）
It is cooled to room temperature, is washed till with absolute ethyl alcohol after being washed with distilled water 3 times after being centrifuged at rotating speed 6500rpm with centrifuge
Layer liquid clarification；（4）It is put into baking oven, is dried 12 hours at 87 DEG C of temperature；（5）By dried object and 70 parts of N,N-dimethylformamides
Mixing, ultrasonic disperse 2 hours；（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise to
It states in dispersion liquid；（7）Remaining ingredient is added after 1.5 hours with Ultrasound Instrument ultrasound, continues ultrasound 1.5 hours, still aging 24 is small
When；（8）It is centrifuged at rotating speed 6500rpm with centrifuge, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, in temperature
It is dried 12 hours at 87 DEG C of degree；（10）It is put into Muffle furnace, calcines 2.5 hours, be cooled to room temperature at 450 DEG C of temperature to obtain the final product.
Embodiment 4
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.25 part of ascorbic acid, nine water
18 parts of ferric nitrate, 0.25 part of sodium Diacetate, 0.17 part of dehydroactic acid sodium, 0.09 part of dodecyl Hydroxypropyl phosphate ester glycine betaine,
75 parts of N,N-dimethylformamide, 0.4 part of nano zine oxide, 9 parts of glucose, 0.25 part of chitosan, water-based acrylic resin
0.09 part, 0.35 part of acetic acid, 95 parts of absolute ethyl alcohol, 95 parts of distilled water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）By ascorbic acid, sodium Diacetate, dehydroactic acid sodium,
Glucose and distilled water, which are mixed 20 minutes, to be dissolved；（2）It is put into reaction kettle, is reacted 5.5 hours at 165 DEG C of temperature；（3）
It is cooled to room temperature, is washed till with absolute ethyl alcohol after being washed with distilled water 3 times after being centrifuged at rotating speed 7000rpm with centrifuge
Layer liquid clarification；（4）It is put into baking oven, is dried 12 hours at 85 DEG C of temperature；（5）By dried object and 75 parts of N,N-dimethylformamides
Mixing, ultrasonic disperse 2 hours；（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise to
It states in dispersion liquid；（7）Remaining ingredient is added after 1.5 hours with Ultrasound Instrument ultrasound, continues ultrasound 1.5 hours, still aging 24 is small
When；（8）It is centrifuged at rotating speed 7000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, in temperature
It is dried 12 hours at 85 DEG C of degree；（10）It is put into Muffle furnace, calcines 2.5 hours, be cooled to room temperature at 450 DEG C of temperature to obtain the final product.
Embodiment 5
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.3 part of ascorbic acid, nine water
20 parts of ferric nitrate, 0.3 part of sodium Diacetate, 0.2 part of dehydroactic acid sodium, 0.1 part of dodecyl Hydroxypropyl phosphate ester glycine betaine, N, N-
100 parts of dimethylformamide, 0.5 part of nano zine oxide, 10 parts of glucose, 0.3 part of chitosan, 0.1 part of water-based acrylic resin,
0.4 part of acetic acid, 100 parts of absolute ethyl alcohol, 100 parts of distilled water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）By ascorbic acid, sodium Diacetate, dehydroactic acid sodium,
Glucose and distilled water, which are mixed 20 minutes, to be dissolved；（2）It is put into reaction kettle, is reacted 6 hours at 170 DEG C of temperature；（3）It is cold
But to room temperature, upper layer is washed till with absolute ethyl alcohol after being washed with distilled water 4 times after being centrifuged at rotating speed 8000rpm with centrifuge
Liquid is clarified；（4）It is put into baking oven, is dried 13 hours at 90 DEG C of temperature；（5）Dried object and 80 parts of N,N-dimethylformamides are mixed
It closes, ultrasonic disperse 2 hours；（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise to above-mentioned
In dispersion liquid；（7）Remaining ingredient is added after 2 hours with Ultrasound Instrument ultrasound, continues ultrasound 2 hours, still aging 25 hours；（8）
It is centrifuged at rotating speed 8000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, in 90 DEG C of temperature
It is lower to dry 13 hours；（10）It is put into Muffle furnace, calcines 3 hours, be cooled to room temperature at 500 DEG C of temperature to obtain the final product.
Comparative example 1
Difference lies in without containing sodium Diacetate and dehydroactic acid sodium with embodiment 5 for the present embodiment.Specifically：
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.3 part of ascorbic acid, nine water
20 parts of ferric nitrate, 0.1 part of dodecyl Hydroxypropyl phosphate ester glycine betaine, 100 parts of N,N-dimethylformamide, nano zine oxide
0.5 part, 10 parts of glucose, 0.3 part of chitosan, 0.1 part of water-based acrylic resin, 0.4 part of acetic acid, 100 parts of absolute ethyl alcohol, distillation
100 parts of water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）Ascorbic acid, glucose and distilled water are mixed and stirred
It mixes 20 minutes and dissolves；（2）It is put into reaction kettle, is reacted 6 hours at 170 DEG C of temperature；（3）It is cooled to room temperature, is existed with centrifuge
After being washed with distilled water 4 times after being centrifuged under rotating speed 8000rpm upper liquid clarification is washed till with absolute ethyl alcohol；（4）It is put into baking oven
In, it is dried 13 hours at 90 DEG C of temperature；（5）Dried object is mixed with 80 parts of n,N-Dimethylformamide, ultrasonic disperse 2 hours；
（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise in above-mentioned dispersion liquid；（7）With super
Remaining ingredient is added in sound instrument ultrasound after 2 hours, continue ultrasound 2 hours, still aging 25 hours；（8）With centrifuge in rotating speed
It centrifuges under 8000rpm, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, is dried 13 hours at 90 DEG C of temperature；
（10）It is put into Muffle furnace, calcines 3 hours, be cooled to room temperature at 500 DEG C of temperature to obtain the final product.
Comparative example 2
Difference lies in without containing nano zine oxide and chitosan with embodiment 5 for the present embodiment.Specifically：
A kind of porous gas sensing property nano material, is prepared by following component with parts by weight：0.3 part of ascorbic acid, nine water
20 parts of ferric nitrate, 0.3 part of sodium Diacetate, 0.2 part of dehydroactic acid sodium, 0.1 part of dodecyl Hydroxypropyl phosphate ester glycine betaine, N, N-
100 parts of dimethylformamide, 10 parts of glucose, 0.1 part of water-based acrylic resin, 0.4 part of acetic acid, 100 parts of absolute ethyl alcohol, distillation
100 parts of water.
The preparation method of above-mentioned porous gas sensing property nano material is：（1）By ascorbic acid, sodium Diacetate, dehydroactic acid sodium,
Glucose and distilled water, which are mixed 20 minutes, to be dissolved；（2）It is put into reaction kettle, is reacted 6 hours at 170 DEG C of temperature；（3）It is cold
But to room temperature, upper layer is washed till with absolute ethyl alcohol after being washed with distilled water 4 times after being centrifuged at rotating speed 8000rpm with centrifuge
Liquid is clarified；（4）It is put into baking oven, is dried 13 hours at 90 DEG C of temperature；（5）Dried object and 80 parts of N,N-dimethylformamides are mixed
It closes, ultrasonic disperse 2 hours；（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise to above-mentioned
In dispersion liquid；（7）Remaining ingredient is added after 2 hours with Ultrasound Instrument ultrasound, continues ultrasound 2 hours, still aging 25 hours；（8）
It is centrifuged at rotating speed 8000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；（9）It is put into baking oven, in 90 DEG C of temperature
It is lower to dry 13 hours；（10）It is put into Muffle furnace, calcines 3 hours, be cooled to room temperature at 500 DEG C of temperature to obtain the final product.
The average pore size of material of the present invention is as follows to the sensibility of acetone gas in 7nm or so, it may be seen that this hair
The bright susceptibility to acetone gas increases with the increase of its concentration, can to its gas sensitization degree highest under 100ppm concentration
Up to 6.6, when concentration reaches 2000ppm, susceptibility highest can rise to 15.8, and gas sensing property is strong, while repeatable usability is good.
The aperture of 1 porous gas sensing property nano material of table and the sensibility to acetone gas
Note：The determination sensor operating temperature of gas sensing property is 350 DEG C.
Claims (9)
1. a kind of porous gas sensing property nano material, it is characterised in that：It is prepared with parts by weight by following component：Ascorbic acid
0.1-0.3 parts, 10-20 parts of nine water ferric nitrate, 0.1-0.3 parts of sodium Diacetate, 0.1-0.2 parts of dehydroactic acid sodium, dodecyl hydroxyl
0.05-0.1 parts of propyl phosphate glycine betaine, 80-100 parts of N,N-dimethylformamide, 0.2-0.5 parts of nano zine oxide, grape
5-10 parts sugared, 0.1-0.3 parts of chitosan, 0.05-0.1 parts of water-based acrylic resin, 0.2-0.4 parts of acetic acid, absolute ethyl alcohol 80-
100 parts, 80-100 parts of distilled water, include the following steps：
（1）Ascorbic acid, sodium Diacetate, dehydroactic acid sodium, glucose and distilled water are mixed 20 minutes and dissolved；
（2）It is put into reaction kettle, is reacted 5-6 hours at 150-170 DEG C of temperature；
（3）It is cooled to room temperature, after being washed with distilled water 2-4 times after being centrifuged at rotating speed 5000-8000rpm with centrifuge
It is washed till upper liquid clarification with absolute ethyl alcohol；
（4）It is put into baking oven, is dried 11-13 hours at 75-90 DEG C of temperature；
（5）Dried object is mixed with 60-80 parts of n,N-Dimethylformamide, ultrasonic disperse 2 hours；
（6）Nine water ferric nitrates and remaining n,N-Dimethylformamide are mixed, are slowly added drop-wise in above-mentioned dispersion liquid；
（7）Remaining ingredient is added after 1-2 hours with Ultrasound Instrument ultrasound, continues ultrasound 1-2 hours, it is 23-25 hours still aging；
（8）It is centrifuged at rotating speed 5000-8000rpm with centrifuge, is washed with ethyl alcohol after being washed with water；
（9）It is put into baking oven, is dried 11-13 hours at 75-90 DEG C of temperature；
（10）It is put into Muffle furnace, calcines 2-3 hours, be cooled to room temperature at 400-500 DEG C of temperature to obtain the final product.
2. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：By following component with parts by weight
It is prepared：0.15-0.25 parts of ascorbic acid, 12-18 parts of nine water ferric nitrate, 0.15-0.25 parts of sodium Diacetate, dehydroactic acid sodium
0.11-0.17 parts, 0.06-0.09 parts of dodecyl Hydroxypropyl phosphate ester glycine betaine, 65-75 parts of N,N-dimethylformamide, receive
0.3-0.4 parts of zinc oxide of rice, 6-9 parts of glucose, 0.15-0.25 parts of chitosan, 0.06-0.09 parts of water-based acrylic resin, second
0.25-0.35 parts sour, 85-95 parts of absolute ethyl alcohol, 85-95 parts of distilled water.
3. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（2）Middle temperature
It it is 155-165 DEG C, the reaction time is 5.5 hours.
4. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（3）Middle rotating speed
For 6000-7000rpm, washing times are 3 times.
5. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（4）Middle temperature
It it is 80-85 DEG C, the time is 12 hours.
6. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（7）In first
Secondary ultrasonic time is 1.5 hours, and second of ultrasonic time is 1.5 hours, and digestion time is 24 hours.
7. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（8）Middle rotating speed
For 6000-7000rpm.
8. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（9）Middle temperature
It it is 80-85 DEG C, the time is 12 hours.
9. a kind of porous gas sensing property nano material according to claim 1, it is characterised in that：The step（10）Middle temperature
It it is 450 DEG C, the calcination time is 2.5 hours.
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| JPH09269307A (en) * | 1996-04-01 | 1997-10-14 | Matsushita Electric Ind Co Ltd | Gas sensor |
| CN100467388C (en) * | 2007-01-22 | 2009-03-11 | 华东师范大学 | Method for synthesizing mesoporous ferric oxide using mesoporous carbon as hard template |
| CN101580240B (en) * | 2009-06-11 | 2011-05-04 | 南京理工大学 | Method for preparing iron-carrying ordered mesoporous carbon materials |
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| CN102583319B (en) * | 2012-02-28 | 2014-02-12 | 中国科学院长春应用化学研究所 | Nitrogen-doped porous carbon material and preparation method thereof |
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