CN1724138A - Porous carbon adsorbing agent containing nano zinc oxide micropartical and its preparation process and application - Google Patents
Porous carbon adsorbing agent containing nano zinc oxide micropartical and its preparation process and application Download PDFInfo
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- CN1724138A CN1724138A CN 200510035312 CN200510035312A CN1724138A CN 1724138 A CN1724138 A CN 1724138A CN 200510035312 CN200510035312 CN 200510035312 CN 200510035312 A CN200510035312 A CN 200510035312A CN 1724138 A CN1724138 A CN 1724138A
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- porous carbon
- zine oxide
- nano zine
- carbon adsorbent
- oxide particulate
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 63
- 229910052799 carbon Inorganic materials 0.000 title claims description 59
- 238000002360 preparation method Methods 0.000 title claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title abstract description 57
- 239000011787 zinc oxide Substances 0.000 title abstract description 28
- 239000003795 chemical substances by application Substances 0.000 title 1
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims abstract description 56
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 54
- 239000003463 adsorbent Substances 0.000 claims abstract description 43
- 239000004530 micro-emulsion Substances 0.000 claims abstract description 10
- 230000001699 photocatalysis Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 32
- 239000004094 surface-active agent Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000003575 carbonaceous material Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 11
- 239000005416 organic matter Substances 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 230000008030 elimination Effects 0.000 claims description 8
- 238000003379 elimination reaction Methods 0.000 claims description 8
- 239000008247 solid mixture Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims description 8
- 229940007718 zinc hydroxide Drugs 0.000 claims description 8
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims description 8
- 241000191967 Staphylococcus aureus Species 0.000 claims description 6
- 230000003115 biocidal effect Effects 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 238000007146 photocatalysis Methods 0.000 claims description 6
- 241000588724 Escherichia coli Species 0.000 claims description 5
- 239000003242 anti bacterial agent Substances 0.000 claims description 4
- 229940088710 antibiotic agent Drugs 0.000 claims description 4
- 238000003421 catalytic decomposition reaction Methods 0.000 claims description 4
- 238000000593 microemulsion method Methods 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 244000198134 Agave sisalana Species 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 abstract description 9
- 239000003610 charcoal Substances 0.000 abstract description 6
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 27
- 239000002245 particle Substances 0.000 description 26
- 239000000047 product Substances 0.000 description 19
- 229960001296 zinc oxide Drugs 0.000 description 18
- 239000013078 crystal Substances 0.000 description 16
- 238000004458 analytical method Methods 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 7
- 239000002244 precipitate Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002156 adsorbate Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000003385 bacteriostatic effect Effects 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- -1 are nano-ZnOs Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 239000012905 visible particle Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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Abstract
A porous charcoal adsorbent for cleaning environment is composed of porous charcoal as carrier and zinc oxide nano-particles as active component. Its preparing process includes such steps as reaction between zinc nitrate micro-emulsion and sodium hydroxide to obtain zinc oxide nano-particles, carrying them by porous charcoal and heat treating. Its advantages are high absorptive power and high photo-catalytic and antibacterial activities.
Description
Technical field
The present invention relates to a kind of porous carbon adsorbent that contains the nano zine oxide particulate and preparation method thereof, and this porous carbon adsorbent is used for the purifying volatile organic pollution and as the purposes of anti-biotic material.
Background technology
Nano material has crucial application prospect because of character such as its distinctive particle size and surface characteristic and the distinctive photochemical catalyst character of nano material thereof and antibiotic, deodorizing thereof, sterilizations in the environmental protection field.Nano-ZnO is a kind of novel high function fine inorganic material, and its particle diameter is between 1～100nm.Because the granular of particle size, make nano-ZnO produce the not available skin effect of its body bulk material, small-size effect, quantum effect and macro quanta tunnel effect etc., thereby make nano-ZnO have some special performances at aspects such as magnetic, light, electricity, sensitivities.Nano-ZnO has the effect of catalyst and photochemical catalyst under the irradiation of ultraviolet light, and energy decomposing organic matter matter can be antibiotic, deodorizing and sterilization, protection and environment purification.
Porous carbon material has abundant microporous and high specific area, and its adsorption capacity is higher than other porous adsorbing materials such as polymeric adsorbent, zeolite, silica gel etc. far away; Also more much better than its like product active carbon.Porous carbon adsorbent is bigger several times even tens times than granular activated charcoal to the adsorbance of organic steam; And because NACF and the strong active force of adsorbate, its micropore directly contacts with adsorbate, has reduced the distance of diffusion.The absorption of porous carbon adsorbent and gas can reach balance in tens of seconds to several minutes; NACF has very strong interaction force to organic matter, can adsorb the organic pollution (VOC) of removing ppm, ppb level and even lower concentration.At present, this class material has been applied to the purified treatment to VOC.But, the complexity of technological design and the complexity of use have been increased owing to after the saturated absorption of porous carbon adsorbent, must carry out desorption and regeneration and could continue to use.By the structural change to sorbing material, the realization original position is regenerated in real time, is to improve material to the processing of VOC and the effective way of transformation efficiency.In addition, because carbon surface is easy to breed bacteria, aspect purifying of drinking water, may cause the microorganism secondary pollution especially.
Summary of the invention
The object of the present invention is to provide a kind of porous carbon adsorbent that contains the nano zine oxide particulate and preparation method thereof, and this porous carbon adsorbent is used for the purifying volatile organic pollution and as the purposes of anti-biotic material.
The present invention utilizes the high-specific surface area and the abundant nano-pore structure of porous carbon material, ZnO superfine nano particle is compounded in the surface of porous carbon material by microemulsion method, prepare porous charcoal-nano-ZnO composite---contain the porous carbon adsorbent of nano zine oxide particulate, the good adsorption performance that had both kept porous carbon material has been brought into play the photocatalysis performance and the anti-microbial property of ZnO superfine nano particle again.
The porous carbon adsorbent that contains the nano zine oxide particulate of the present invention is to be formed by nano zine oxide particulate in the porous carbon material load, and wherein nano zine oxide accounts for 5～70% of gross mass.
Described porous carbon material is generally NACF or active carbon.
Described NACF is normally formed through the high temperature cabonization activation by sisal fiber, pitch fibers, phenolic fibre, viscose rayon, PVA fiber or PAN fiber.
Nano zine oxide particulate in the porous carbon adsorbent that contains the nano zine oxide particulate of the present invention can and load on the porous carbon material through the microemulsion method preparation.
The porous carbon adsorbent that contains the nano zine oxide particulate of the present invention can prepare by the following method:
Ethanol, water and zinc nitrate are mixed, add surfactant, be made into microemulsion, add porous carbon material then; Ethanol: water: zinc nitrate: surfactant=(20～30) ml: (60～120) ml: (2～8) g: (15～20) g, the mass ratio of zinc nitrate and porous carbon material are controlled between 0.01: 1～0.5: 1; Stir and to add sodium hydroxide solution down, make to form the zinc hydroxide precipitation, the mol ratio of zinc nitrate and NaOH is 5: 1～1: 3 (mass ratio be about 25: 1～1.5: 1); Elimination solution, washing, drying; The gained solid mixture promptly obtains the required porous carbon adsorbent that contains the nano zine oxide particulate in 300～600 ℃ of calcination 1～2h.Used surfactant is generally dodecyl sodium sulfate, neopelex or softex kw.
The present invention through generating nano zine oxide with the NaOH reaction and being carried on the carrier porous carbon material, makes the porous carbon adsorbent composite of supported nano zinc oxide particulate by the zinc nitrate microemulsion by adopting microemulsion method through heat treatment.Gained porous carbon adsorbent composite has kept porous charcoal to inhale the porous of material, thereby has kept the strong adsorption capacity of material; Simultaneously, the photocatalytic activity and the antibacterial activity of zinc oxide fine particles have superposeed in this material again, make this composite both can be used for catalytic decomposition light-concentration volatile organic pollution, can prevent that again microorganism from the growing of carbon surface, having prevented the secondary pollution of microorganism; Also can be used as the antibacterial bacteriostatic material.Aspect the depollution of environment, has important application prospects.
Test shows:
The porous carbon adsorbent that the present invention contains the nano zine oxide particulate can reach more than the 500mg/g the adsorption capacity of volatile organic contaminant, can reach 20% to the photocatalysis Decomposition rate of volatile organic contaminant.
It is 10 that the porous carbon adsorbent that the present invention contains the nano zine oxide particulate can be killed concentration fully
7The Escherichia coli of cfu/mL or staphylococcus aureus.
Therefore, the porous carbon adsorbent that the present invention contains the nano zine oxide particulate can be used for the material as the airborne low concentration volatile organic matter of photocatalysis Decomposition (VOC), or as anti-biotic material.
When the porous carbon adsorbent that contains the nano zine oxide particulate of the present invention is used to adsorb the decomposing volatile organic pollution, the gas that normally will contain VOC is by the above-described porous carbon adsorbent fixed bed that contains the nano zine oxide particulate, and under ultra violet lamp, the gas that contains VOC is fully contacted with the porous carbon adsorbent that contains the nano zine oxide particulate, can be with the VOC catalytic decomposition.
When the porous carbon adsorbent that contains the nano zine oxide particulate of the present invention is used as the antibacterial bacteriostatic material, the solution that normally will contain Escherichia coli or staphylococcus aureus directly contacts 0.5～2h with the porous carbon adsorbent of above-described supported nano zinc oxide particulate, can kill the bacterium in the solution.
The porous carbon adsorbent of supported nano zinc oxide particulate of the present invention carries out under dynamic condition the adsorption capacity of volatile organic contaminant and the mensuration of photocatalysis Decomposition efficient.The gas that contains volatile organic matter that makes certain humidity according to exit concentration, is estimated adsorption capacity or the decomposition efficiency of porous carbon adsorbent to volatile organic matter by above-mentioned porous carbon adsorbent fixed bed.
Description of drawings
Fig. 1 is the sem photograph that contains the acticarbon sample of nano zine oxide particulate.Show the zinc-oxide nano sized particles of activated carbon surface dense distribution, particle is long column shape, and diameter is about about 30nm, and draw ratio is about 3: 1.
Fig. 2 is the sem photograph that contains the activated carbon fiber adsorbing substance sample of nano zine oxide particulate.Show the equally distributed Zinc oxide nanoparticle in NACF surface, size is about about 10～20nm.
Fig. 3 is the X-ray diffracting spectrum that contains the porous carbon adsorbent of nano zine oxide particulate.With database look into standard diagram contrast, be highly purified hexagonal crystal system zinc oxide.XRD material phase analysis result shows that active carbon or the adsorbate above the charcoal fiber mainly are nano-ZnOs, and particle diameter is hexagonal wurtzite structure between 11～24nm.
The specific embodiment
Embodiment 1
In ethanol: the ratio of water: zinc nitrate: surfactant: NACF=30ml: 100ml: 5g: 15g: 5g, ethanol, water and zinc nitrate are mixed, add the surfactant neopelex again, be made into microemulsion; Add NACF then; Stir and press zinc nitrate down: the mol ratio of NaOH=1: 1 adds sodium hydroxide solution (concentration 1 mol), makes to form zinc hydroxide and precipitate.Elimination solution, washing, drying; The gained solid mixture promptly obtains the NACF that product contains the nano zine oxide particulate in 600 ℃ of calcination 1h.The load capacity of zinc oxide is 40%wt in the product.Product is through scanning electron microscope analysis, and the particle that its area load is intensive, particle are the reunion attitude, about aggregation size 1 μ m.Aggregate is made up of many more tiny nano-scale particles.This particle proves the hexagonal crystal system zincite crystal through the X-ray diffraction analysis.
Embodiment 2
In ethanol: the ratio of water: zinc nitrate: surfactant: NACF=20ml: 120ml: 5g: 20g: 5g, ethanol, water and zinc nitrate are mixed, add the surfactant neopelex again, be made into microemulsion; Add NACF then; Stir and press zinc nitrate down: the mol ratio of NaOH=1: 3 adds sodium hydroxide solution (concentration 2 mol), makes to form zinc hydroxide and precipitate.Elimination solution, washing, drying; The gained solid mixture promptly obtains the NACF that product contains the nano zine oxide particulate in 600 ℃ of calcination 1h.The load capacity of zinc oxide is 20% in the product.Product is through scanning electron microscope analysis, and its area load dispersed particle is about particle particle diameter 10～20nm.This particle proves the hexagonal crystal system zincite crystal through the X-ray diffraction analysis.The size of microcrystal that calculates according to X-ray diffraction is 10nm.
Embodiment 3
In ethanol: the ratio of water: zinc nitrate: surfactant: active carbon=30ml: 100ml: 8g: 20g: 5g, ethanol, water and zinc nitrate are mixed, add the surfactant dodecyl sodium sulfate again, be made into microemulsion; Add active carbon then; Stir and press zinc nitrate down: the mol ratio of NaOH=1: 1 adds sodium hydroxide solution (concentration 1 mol), makes to form zinc hydroxide and precipitate.Elimination solution, washing, drying; The gained solid mixture promptly obtains the active carbon that product contains the nano zine oxide particulate in 600 ℃ of calcination 1h.The load capacity of zinc oxide is 65%wt in the product.Product is through scanning electron microscope analysis, the intensive strip hexagonal columnar of its area load crystal, the about 20nm of crystal diameter, the about 300nm of length.This particle proves the hexagonal crystal system zincite crystal through the X-ray diffraction analysis.
Embodiment 4
In ethanol: the ratio of water: zinc nitrate: surfactant: active carbon=30ml: 120ml: 2g: 10g: 30g, ethanol, water and zinc nitrate are mixed, add the surfactant softex kw again, be made into microemulsion; Add active carbon then; Stir and press zinc nitrate down: the mol ratio of NaOH=1: 0.2 adds sodium hydroxide solution (concentration 1 mol), makes to form zinc hydroxide and precipitate.Elimination solution, washing, drying; The gained solid mixture promptly obtains the active carbon that product contains the nano zine oxide particulate in 600 ℃ of calcination 2h.The load capacity of zinc oxide is 10%wt in the product.Product is through scanning electron microscope analysis, the intensive granular crystal of its area load, the about 20nm of particle diameter.This particle proves the hexagonal crystal system zincite crystal through the X-ray diffraction analysis.
Embodiment 5
In ethanol: the ratio of water: zinc nitrate: surfactant: active carbon=30ml: 100ml: 2g: 10g: 50g, ethanol, water and zinc nitrate are mixed, add the surfactant neopelex again, be made into microemulsion; Add active carbon then; Stir and press zinc nitrate down: the mol ratio of NaOH=1: 3 adds sodium hydroxide solution (concentration 0.1 mol), makes to form zinc hydroxide and precipitate.Elimination solution, washing, drying; The gained solid mixture promptly obtains the active carbon that product contains the nano zine oxide particulate in 600 ℃ of calcination 1h.The load capacity of zinc oxide is 5%wt in the product.Product is through scanning electron microscope analysis, its area load dispersed particle, the about 20nm of particle particle diameter.This particle proves the hexagonal crystal system zincite crystal through the X-ray diffraction analysis.Particle is through transmission electron microscope analysis, and the visible particles size evenly has reunion slightly, and particle diameter is between 10～24nm, and the shape of particle has hexagonal prism type and trend ball-type.
Embodiment 6
In ethanol: the ratio of water: zinc nitrate: surfactant: active carbon=30ml: 100ml: 5g: 10g: 2.5g, ethanol, water and zinc nitrate are mixed, add the surfactant neopelex again, be made into microemulsion; Add active carbon then; Stir and press zinc nitrate down: the mol ratio of NaOH=1: 1 adds sodium hydroxide solution (concentration 1 mol), makes to form zinc hydroxide and precipitate.Elimination solution, washing, drying; The gained solid mixture promptly obtains the NACF that product contains the nano zine oxide particulate in 300 ℃ of calcination 1h.The load capacity of zinc oxide is 70%wt in the product.Product is through scanning electron microscope analysis, the blocky-shaped particle thing that its area load is intensive, and particle is the reunion attitude, about aggregation size 1 μ m.Aggregate is made up of many more tiny nano-scale particles.This particle proves the hexagonal crystal system zincite crystal through the X-ray diffraction analysis.
Embodiment 7
To contain the fixed bed of the gas of VOC toluene vapor by the porous carbon adsorbent of load zinc-oxide nano particulate.Gas flow rate is 300mL/min, and the inlet toluene concentration is 2mg/L, relative humidity 85%.Absorption is carried out at ambient temperature.When exit concentration was identical with entrance concentration, the porous charcoal of computational load zinc-oxide nano particulate was 500mg/g to the absorption total amount of toluene.
To contain the fixed bed of the gas of VOC toluene vapor by the porous carbon adsorbent of load zinc-oxide nano particulate.Gas flow rate is 300mL/min, and the inlet toluene concentration is 2mg/L, relative humidity 85%.Absorption is carried out at ambient temperature.Do not having under the light conditions, the outlet toluene concentration is 0.2mg/L; Under the UV-irradiation situation, the outlet toluene concentration is 0.16mg/L.Show that this material has strong catalytic decomposition ability to toluene, the photocatalysis Decomposition rate of toluene is 20% under this condition.
Embodiment 9
Containing the Escherichia coli counting at 20 milliliters is 4 * 10
6It is 4 * 10 that the solution neutralization of cfu/ml contains the staphylococcus aureus counting
6In the solution of cfu/ml, the NACF that adds 50mg load Zinc oxide nanoparticle respectively, contact after 2 hours, the detection of Escherichia coli in the solution and staphylococcus aureus is shown that it is 4 * 10 that the NACF of load zinc-oxide nano particulate can contain 20ml bacterial concentration
6Escherichia coli or the staphylococcus aureus of cfu/ml are killed fully.
Claims (10)
1. a porous carbon adsorbent that contains the nano zine oxide particulate is characterized in that this porous carbon adsorbent is to be formed by nano zine oxide particulate in the porous carbon material load, and wherein nano zine oxide accounts for 5～70% of gross mass.
2. a porous carbon adsorbent as claimed in claim 1 is characterized in that described porous carbon material is NACF or active carbon.
3. a porous carbon adsorbent as claimed in claim 2 is characterized in that described NACF is formed through the high temperature cabonization activation by sisal fiber, pitch fibers, phenolic fibre, viscose rayon, PVA fiber or PAN fiber.
4. one kind as the described porous carbon adsorbent of claim 1,2 or 3, it is characterized in that described nano zine oxide particulate is through the microemulsion method preparation and load on the porous carbon material.
5. a preparation method who contains the porous carbon adsorbent of nano zine oxide particulate is characterized in that ethanol, water and zinc nitrate are mixed, and adds surfactant, is made into microemulsion, adds porous carbon material then; Ethanol: water: zinc nitrate: surfactant=(20～30) ml: (60～120) ml: (2～8) g: (15～20) g, the mass ratio of zinc nitrate and porous carbon material are controlled between 0.01: 1～0.5: 1; Stir adding sodium hydroxide solution down, make to form the zinc hydroxide precipitation, the mol ratio of zinc nitrate and NaOH is 5: 1～1: 3; Elimination solution, washing, drying; The gained solid mixture promptly obtains the required porous carbon adsorbent that contains the nano zine oxide particulate in 300～600 ℃ of calcination 1～2h.
6. method as claimed in claim 5 is characterized in that described surfactant is dodecyl sodium sulfate, neopelex or softex kw.
7. the described application that contains the porous carbon adsorbent of nano zine oxide particulate as the material of the airborne low concentration volatile organic matter of photocatalysis Decomposition of one of claim 1～4.
8. according to the described application of claim 7, it is characterized in that to contain the gas of low concentration volatile organic matter by the described porous carbon adsorbent fixed bed that contains the nano zine oxide particulate, and under ultra violet lamp, the gas that contains low concentration volatile organic matter is fully contacted with the porous carbon adsorbent that contains the nano zine oxide particulate, can be with the low concentration volatile organic matter catalytic decomposition.
9. the described application that contains the porous carbon adsorbent of nano zine oxide particulate as anti-biotic material of one of claim 1～4.
10. according to the described application of claim 9, it is characterized in that the solution that will contain Escherichia coli or staphylococcus aureus directly contacts 0.5～2h with the described porous carbon adsorbent that contains the nano zine oxide particulate, can kill the bacterium in the solution.
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