CN102650077A - Chitosan-finishing iron nanowire, method for producing same and application thereof - Google Patents
Chitosan-finishing iron nanowire, method for producing same and application thereof Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 239000002070 nanowire Substances 0.000 title claims abstract description 77
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title description 3
- 229920001661 Chitosan Polymers 0.000 claims abstract description 64
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 11
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 6
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims abstract 11
- 239000003513 alkali Substances 0.000 claims abstract 3
- 239000003463 adsorbent Substances 0.000 claims abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 16
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 8
- 235000006408 oxalic acid Nutrition 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 4
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 claims 2
- 229960005070 ascorbic acid Drugs 0.000 claims 1
- 235000010323 ascorbic acid Nutrition 0.000 claims 1
- 239000011668 ascorbic acid Substances 0.000 claims 1
- 239000002659 electrodeposit Substances 0.000 claims 1
- 238000004070 electrodeposition Methods 0.000 abstract 1
- 238000009415 formwork Methods 0.000 description 45
- 239000000047 product Substances 0.000 description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000008186 active pharmaceutical agent Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 239000011651 chromium Substances 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000002389 environmental scanning electron microscopy Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002594 sorbent Substances 0.000 description 2
- 235000007926 Craterellus fallax Nutrition 0.000 description 1
- 240000007175 Datura inoxia Species 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 description 1
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical class Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
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Abstract
本发明公开了一种修饰有壳聚糖的铁纳米线及其制备方法和用途。铁纳米线为其外修饰有壳聚糖且位于多孔氧化铝模板的孔中，其与孔壁之间有1～5nm的空隙，铁纳米线是沿(110)方向生长的，其线直径为50～55nm、线长为380～420nm，多孔氧化铝模板的孔直径为55～60nm、孔长为380～420nm、孔密度为3.5×1014/m2。方法为先使用阳极氧化法得到多孔氧化铝模板，再对多孔氧化铝模板使用电沉积法得到孔中置有铁纳米线的多孔氧化铝模板，接着，先将其置于强碱溶液中腐蚀2～5min，得到孔中的铁纳米线与孔壁之间有空隙的多孔氧化铝模板，再将其置于浓度为0.05～0.15wt％的壳聚糖溶液中浸泡10～20s后取出干燥，制得修饰有壳聚糖的铁纳米线。它可作为吸附剂，用于受六价铬污染的溶液中进行吸附处理。
The invention discloses an iron nanowire modified with chitosan, a preparation method and application thereof. The iron nanowires are modified with chitosan and located in the pores of the porous alumina template. There is a gap of 1-5nm between them and the pore wall. The iron nanowires grow along the (110) direction, and the wire diameter is 50-55nm, the line length is 380-420nm, the pore diameter of the porous alumina template is 55-60nm, the pore length is 380-420nm, and the pore density is 3.5×10 14 /m 2 . The method is to first use the anodic oxidation method to obtain a porous alumina template, and then use the electrodeposition method to obtain a porous alumina template with iron nanowires in the pores, and then place it in a strong alkali solution to corrode for 2 ~5min, to obtain a porous alumina template with a gap between the iron nanowires in the hole and the hole wall, then place it in a chitosan solution with a concentration of 0.05~0.15wt%, soak it for 10~20s, and then take it out and dry it. iron nanowires modified with chitosan. It can be used as an adsorbent for adsorption treatment in solutions contaminated with hexavalent chromium.
Description
Technical field
The present invention relates to a kind of nano wire and preparation method and purposes, especially a kind of Fe nanowire that is modified with chitosan.
Background technology
As everyone knows, iron nano-particle has good reduction and absorption property, can also exist the defective that the surface is prone to be prone between oxidation, the particle reunion, thereby has reduced the ability of its reductive activity and absorption widely.For addressing this problem; Have among the people it is carried out the change of pattern and in the finishing chitosan, as just it having been done introduction in " analytical chemistry research notes " the 37th the 2nd phase of volume the 275th～278 page " preparation of Fe nanowire/chitosan/antibody bioprobe and chromatography detection " of publishing in February, 2009.It is earlier with aluminium foil through electrochemical etching, clean after, use anonizing to obtain alumina formwork, re-use electrodip process and in the hole of alumina formwork, deposit Fe nanowire; Then; Use earlier saturated tin chloride solution to remove the template aluminum substrate, again template be dissolved in the sodium hydroxide solution, with deionized water clean repeatedly, magnetic support is settled down to pH value of solution=7.0; Obtain homodisperse Fe nano wire solution after ultrasonic; Afterwards, earlier Fe nano wire, whiteruss and span-80 are added back ultra-sonic dispersion in the chitosan acetic acid soln, again after wherein adding glutaraldehyde solution; With sherwood oil, acetone, deionized water repetitive scrubbing, magnetic support sedimentation, at last the final product that obtains is dispersed in 4 ℃ of preservations in the phosphate buffer soln (pH=7.0).But, no matter be Fe nanowire/chitosan/antibody bioprobe, or its preparation method, all exist weak point, at first, the Fe nanowire in the final product is wrapped in the chitosan, and this will restrict giving full play to of Fe nanowire performance widely; Secondly, alleviate to some extent, so still fail fundamentally to solve though reunite; Once more, the condition of harsh preservation final product has improved the cost of its application; At last, the raw material that the preparation method need use is many, and technology is too numerous and diverse.
Summary of the invention
The technical problem that the present invention will solve provides a kind of rational in infrastructure for overcoming weak point of the prior art, the Fe nanowire that is modified with chitosan easy to use.
Another technical problem that the present invention will solve is that a kind of above-mentioned preparation method who is modified with the Fe nanowire of chitosan is provided.
Technical problem in addition that the present invention will solve is that a kind of above-mentioned purposes that is modified with the Fe nanowire of chitosan is provided.
For solving technical problem of the present invention, the technical scheme that is adopted is: the Fe nanowire that is modified with chitosan comprises the outer chitosan of modifying of Fe nanowire and its, particularly,
Said its outer Fe nanowire that is modified with chitosan is arranged in the hole of porous alumina formwork, and between itself and the hole wall space of 1～5nm is arranged;
Said Fe nanowire is along the growth of (110) direction, and its linear diameter is that 50～55nm, line length are 380～420nm;
The bore dia of said porous alumina formwork is that 55～60nm, Kong Changwei 380～420nm, hole density are 3.5 * 10
14/ m
2
For solving another technical problem of the present invention, another technical scheme that is adopted is: the above-mentioned preparation method who is modified with the Fe nanowire of chitosan comprises anonizing, and particularly completing steps is following:
Step 1; Earlier aluminium flake being placed concentration is the oxalic acid solution of 0.2～0.4M; Anodic oxidation 25～35min under volts DS 35～45V is placed on temperature again and is 35～45 ℃, concentration and be in the phosphoric acid solution of 4～6wt% and soaks 20min at least, obtains porous alumina formwork;
Step 3, earlier the porous alumina formwork that the space is arranged between Fe nanowire in the hole and the hole wall being placed concentration is that the chitosan solution of 0.05～0.15wt% soaks 10～20s, it is taken out dryly again, makes the Fe nanowire that is modified with chitosan.
As the preparing method's of the Fe nanowire that is modified with chitosan further improvement, the purity of described aluminium flake is>=99.9%; Described electrolytic iron liquid is the ferric sulfate (FeSO of 80g/L by concentration
4), the boric acid (H of 30g/L
3BO
3) and the xitix of 15g/L mix; Described strong base solution is a sodium hydroxide solution, or potassium hydroxide solution, or lithium hydroxide solution; The concentration of described sodium hydroxide solution is that 5wt%, temperature are 35 ℃; Described chitosan solution is by being that 1: 5: 1000 ratio is formulated in mass ratio between chitosan, acetate and the water.
For solving the technical problem that also has of the present invention, the technical scheme that also has that is adopted is: the above-mentioned purposes that is modified with the Fe nanowire of chitosan does,
The Fe nanowire that is modified with chitosan as sorbent material, is placed to receive hexavalent chromium polluted solution to carry out adsorption treatment.
Beneficial effect with respect to prior art is; One of which; Use ESEM and X-ray diffractometer to characterize respectively to the title product that makes, can be known by its result, title product is that on end it is modified with thread of chitosan outward in the orderly hole of the arrangement of template.The spacing that 1～5nm wherein, is arranged between thread and the template hole wall; Thread is that its linear diameter is that 50～55nm, line length are 380～420nm along the Fe nanowire of (110) direction growth; Template is a porous alumina formwork, and its bore dia is that 55～60nm, Kong Changwei 380～420nm, hole density are 3.5 * 10
14/ m
2Title product with above-mentioned pattern and size had both been guaranteed that Fe nanowire wherein can be not oxidized, thereby had been influenced effective performance of its original performance, had stopped the generation of reuniting again, also because of the cost of using that reduced widely easy to use.They are two years old; With repeatedly many placing the hexavalent chromium polluted water that receive different amounts to adsorb respectively and reduces the test of processing in batches of title product; Its result shows; Title product also can become nontoxic trivalent chromium with deleterious hexavalent chrome reduction except that concentration being low to moderate sexavalent chrome solution more than the 0.5mg/L all can adsorb effectively.Its three, preparing method's science, effectively, not only materials are few and environmental protection; Also there is technology convenient; Be beneficial to the characteristics of suitability for industrialized production,, thereby do not have influence on the performance of Fe nanowire especially because the chitosan of outside Fe nanowire, modifying is merely the thickness of molecular layer; Make Fe nanowire at the normal lotus of chitosan band, other alumina formwork itself also positively charged, sexavalent chrome group (Cr
2O
7 2-) electronegative, there is stronger electrostatic interaction between the positive electricity of chitosan and oxidation aluminium strip and the sexavalent chrome group and when adsorbing each other, is able to sexavalent chrome is carried out reduction reaction, it is reduced into trivalent chromium.
As the further embodiment of beneficial effect, the one, the purity of aluminium flake is preferably >=and 99.9%, be beneficial to the template that obtains better quality; The 2nd, electrolytic iron liquid is that the ferric sulfate of 80g/L, the boric acid of 30g/L and the xitix of 15g/L mix by concentration preferably, is beneficial to and obtains Fe nanowire; The 3rd, strong base solution is preferably sodium hydroxide solution, or potassium hydroxide solution, or lithium hydroxide solution, except that making the source of raw material than the horn of plenty, also makes preparation technology more be prone to implement and flexibly; The 4th, the concentration of sodium hydroxide solution is preferably 5wt%, temperature is 35 ℃, is easy to control the corrosive degree, obtains the title product of appropriate clearance; The 5th, preferably by being that 1: 5: 1000 ratio is formulated in mass ratio between chitosan, acetate and the water, the chitosan solution of this kind concentration is easy to infiltrate between Fe nanowire and the template hole wall chitosan solution, and on Fe nanowire beautify chitosan.
Description of drawings
Below in conjunction with accompanying drawing optimal way of the present invention is described in further detail.
Fig. 1 uses one of result that ESEM (SEM) and X-ray diffraction (XRD) appearance characterize respectively to the porous alumina formwork that obtains and the title product that makes.Wherein, Fig. 1 a is the SEM photo of porous alumina formwork; Fig. 1 b is the SEM photo of title product; The SEM photo that Fig. 1 c has amplified for the part of title product shown in Fig. 1 b; Section and Fig. 1 c by title product shown in Fig. 1 b can find out; The linear diameter of title product is about 50～55nm, and length is about 400nm, between the nano wire in the title product and the hole wall of template tangible space is arranged; Fig. 1 d is the XRD spectra of title product, and it has shown the Fe nanowire in the title product along (110) direction growth, and does not have oxidation by air, has proved that porous alumina formwork protected the iron in the hole not oxidized.
Fig. 2 uses the ultraviolet-visible sub-ray spectrometer to adsorb one of result of test to the title product that makes.The condition of test does, respectively title product 2.4mg placed the 10mL sexavalent chrome solution of different concns, and absorption is tested behind the 400min.Wherein, Fig. 2 a is that concentration is the absorption curve figure of 59mg/L, and Fig. 2 b is that concentration is the absorption curve figure of 10mg/L, can find out that by Fig. 2 a and Fig. 2 b the adsorption effect of title product is fine.
To be title product that use is made carry out solution after the adsorption treatment to sexavalent chrome solution to Fig. 3 uses one of result that x-ray photoelectron power spectrum (XPS) appearance characterizes.Can be found out that by XPS spectrum figure the sexavalent chrome after the absorption has been transformed into trivalent chromium, its toxicity has been reduced widely.
Embodiment
At first buy or make with ordinary method from market:
The aluminium flake of purity >=99.9%; Oxalic acid solution; Phosphoric acid solution; By concentration the electrolytic iron liquid that the xitix of boric acid and 15g/L of ferric sulfate, the 30g/L of 80g/L mixes; Sodium hydroxide solution or potassium hydroxide solution or lithium hydroxide solution as strong base solution; By the formulated chitosan solution of ratio that between chitosan, acetate and the water is 1: 5: 1000 in mass ratio.Then,
Embodiment 1
The concrete steps of preparation are:
Step 1, earlier aluminium flake being placed concentration is the oxalic acid solution of 0.2M, anodic oxidation 35min under volts DS 35V; Be placed on temperature again and be 35 ℃, concentration and be in the phosphoric acid solution of 4wt% and soak 24min, obtain being similar to the porous alumina formwork shown in Fig. 1 a.
Step 3, earlier the porous alumina formwork that the space is arranged between Fe nanowire in the hole and the hole wall being placed concentration is that the chitosan solution of 0.05wt% soaks 20s.Again it is taken out dryly, make and be similar to shown in Fig. 1 b and Fig. 1 c, and the Fe nanowire that is modified with chitosan shown in the curve among Fig. 1 d.
The concrete steps of preparation are:
Step 1, earlier aluminium flake being placed concentration is the oxalic acid solution of 0.25M, anodic oxidation 33min under volts DS 38V; Be placed on temperature again and be 38 ℃, concentration and be in the phosphoric acid solution of 4.5wt% and soak 23min, obtain being similar to the porous alumina formwork shown in Fig. 1 a.
Step 3, earlier the porous alumina formwork that the space is arranged between Fe nanowire in the hole and the hole wall being placed concentration is that the chitosan solution of 0.08wt% soaks 18s.Again it is taken out dryly, make and be similar to shown in Fig. 1 b and Fig. 1 c, and the Fe nanowire that is modified with chitosan shown in the curve among Fig. 1 d.
Embodiment 3
The concrete steps of preparation are:
Step 1, earlier aluminium flake being placed concentration is the oxalic acid solution of 0.3M, anodic oxidation 30min under volts DS 40V; Be placed on temperature again and be 40 ℃, concentration and be in the phosphoric acid solution of 5wt% and soak 22min, obtain the porous alumina formwork shown in Fig. 1 a.
Step 3, earlier the porous alumina formwork that the space is arranged between Fe nanowire in the hole and the hole wall being placed concentration is that the chitosan solution of 0.1wt% soaks 15s.Again it is taken out drying, make shown in Fig. 1 b and Fig. 1 c, and the Fe nanowire that is modified with chitosan shown in the curve among Fig. 1 d.
Embodiment 4
The concrete steps of preparation are:
Step 1, earlier aluminium flake being placed concentration is the oxalic acid solution of 0.35M, anodic oxidation 28min under volts DS 43V; Be placed on temperature again and be 43 ℃, concentration and be in the phosphoric acid solution of 5.5wt% and soak 21min, obtain being similar to the porous alumina formwork shown in Fig. 1 a.
Step 3, earlier the porous alumina formwork that the space is arranged between Fe nanowire in the hole and the hole wall being placed concentration is that the chitosan solution of 0.13wt% soaks 13s.Again it is taken out dryly, make and be similar to shown in Fig. 1 b and Fig. 1 c, and the Fe nanowire that is modified with chitosan shown in the curve among Fig. 1 d.
Embodiment 5
The concrete steps of preparation are:
Step 1, earlier aluminium flake being placed concentration is the oxalic acid solution of 0.4M, anodic oxidation 25min under volts DS 45V; Be placed on temperature again and be 45 ℃, concentration and be in the phosphoric acid solution of 6wt% and soak 20min, obtain being similar to the porous alumina formwork shown in Fig. 1 a.
Step 3, earlier the porous alumina formwork that the space is arranged between Fe nanowire in the hole and the hole wall being placed concentration is that the chitosan solution of 0.15wt% soaks 10s.Again it is taken out dryly, make and be similar to shown in Fig. 1 b and Fig. 1 c, and the Fe nanowire that is modified with chitosan shown in the curve among Fig. 1 d.
Select potassium hydroxide solution or lithium hydroxide solution more respectively for use, repeat the foregoing description 1～5 as strong base solution, made equally as or be similar to shown in Fig. 1 b and Fig. 1 c and the Fe nanowire that is modified with chitosan shown in the curve among Fig. 1 d.
The purposes that is modified with the Fe nanowire of chitosan does, the Fe nanowire that is modified with chitosan as sorbent material, is placed to receive hexavalent chromium polluted solution to carry out adsorption treatment, obtain as or be similar to absorption shown in the curve among Fig. 2 and Fig. 3 and reduction result.
Obviously, those skilled in the art can to the Fe nanowire that is modified with chitosan of the present invention and its production and use carry out various changes and modification and do not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
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2011
- 2011-02-24 CN CN201110046910XA patent/CN102650077A/en active Pending
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|---|---|---|---|---|
| CN1300713A (en) * | 1999-12-22 | 2001-06-27 | 南京大学 | Process for synthesizing nm carbon tubes containing nm metal wires |
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