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Chitosan-finishing iron nanowire, method for producing same and application thereof

A technology of iron nanowires and chitosan, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of increased cost of final products, harsh storage, complicated processes, etc. Conducive to industrialized production, less material and convenient process

Inactive Publication Date: 2012-08-29
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, no matter it is iron nanowire / chitosan / antibody bioprobe, or its preparation method, all there is weak point, at first, the iron nanowire in the final product is wrapped in chitosan, this must It will greatly restrict the full play of the performance of iron nanowires; secondly, although the agglomeration has been alleviated, it has not been fundamentally solved; thirdly, the harsher conditions for preserving the final product have increased the cost of its application; finally, the preparation The method needs to use many raw materials, and the process is too complicated

Method used

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  • Chitosan-finishing iron nanowire, method for producing same and application thereof
  • Chitosan-finishing iron nanowire, method for producing same and application thereof
  • Chitosan-finishing iron nanowire, method for producing same and application thereof

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Embodiment 1

[0026] The concrete steps of preparation are:

[0027] Step 1, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.2M, and anodize it at a DC voltage of 35V for 35 minutes; At figure 1 The porous alumina template shown in a.

[0028] In step 2, the porous alumina template is first placed in the iron electrolyte, and electrodeposited at an AC voltage of 7V for 5 minutes to obtain a porous alumina template with iron nanowires placed in the holes. Then place the porous alumina template with iron nanowires in the holes and corrode it in a strong alkali solution for 2min; wherein, the strong alkali solution is a sodium hydroxide solution with a concentration of 5wt% and a temperature of 35°C to obtain iron in the holes A porous alumina template with gaps between the nanowires and the pore walls.

[0029]In step 3, the porous alumina template with a gap between the iron nanowire in the hole and the hole wall is placed in a chitosan solution with a ...

Embodiment 2

[0031] The concrete steps of preparation are:

[0032] Step 1, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.25M, and anodize it at a DC voltage of 38V for 33 minutes; then soak it in a phosphoric acid solution with a temperature of 38°C and a concentration of 4.5wt% for 23 minutes to obtain similar to figure 1 The porous alumina template shown in a.

[0033] In step 2, the porous alumina template is first placed in the iron electrolyte, and electrodeposited at an AC voltage of 7.5V for 4 minutes to obtain a porous alumina template with iron nanowires placed in the pores. Then place the porous alumina template with iron nanowires in the holes and corrode it in a strong alkali solution for 3 minutes; wherein, the strong alkali solution is a sodium hydroxide solution with a concentration of 5wt% and a temperature of 35°C to obtain iron in the holes A porous alumina template with gaps between the nanowires and the pore walls.

[0034] In s...

Embodiment 3

[0036] The concrete steps of preparation are:

[0037] Step 1, first place the aluminum sheet in an oxalic acid solution with a concentration of 0.3M, anodize it at a DC voltage of 40V for 30min; then soak it in a phosphoric acid solution with a temperature of 40°C and a concentration of 5wt% for 22min to obtain figure 1 The porous alumina template shown in a.

[0038] In step 2, the porous alumina template is first placed in the iron electrolyte, and electrodeposited at an AC voltage of 8V for 3 minutes to obtain a porous alumina template with iron nanowires placed in the holes. Then place the porous alumina template with iron nanowires in the holes and corrode it in a strong alkali solution for 3.5min; wherein, the strong alkali solution is a sodium hydroxide solution with a concentration of 5wt% and a temperature of 35°C to obtain the Porous alumina template with gaps between iron nanowires and pore walls.

[0039] In step 3, the porous alumina template with a gap between...

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Abstract

The invention discloses a chitosan-finishing iron nanowire, a method for producing the same and an application thereof. The iron nanowire is externally finished with chitosan, is positioned in a pore of a porous alumina mouldboard, keeps a clearance of 1-5nm with a pore wall, grows along the (110) direction, and has the wire diameter of 50-55nm and the length of 380-420nm, and the porous alumina mouldboard has the pore diameter of 55-60nm, the pore length of 380-420nm and the pore density of 3.5 multiplied by 1014 / m<2>. The method comprises the steps that an anodic oxidation method is firstly used to obtain the porous alumina mouldboard; an electrolytic deposition method is used to treat the porous alumina mouldboard to obtain the porous alumina mouldboard with a pore in which an iron nanowire is arranged; then, the porous alumina mouldboard is firstly put into strong alkali solution to be etched for 2-5 minutes, so the porous alumina mouldboard in the state that the iron nanowire in the pore keeps the clearance with the pore wall is obtained; and the porous alumina mouldboard is then put in chitosan solution with the concentration of 0.05-0.15wt% to be soaked for 10-20 seconds, and then taken out and dried, so the chitosan-finishing iron nanowire is produced. The chitosan-finishing iron nanowire can be used as adsorbent, and is used in the solution which is polluted by hexavalent chromium for adsorption treatment.

Description

technical field [0001] The invention relates to a nanowire, its preparation method and application, in particular to an iron nanowire modified with chitosan, its preparation method and application. Background technique [0002] As we all know, iron nanoparticles have good reduction and adsorption properties, but there are also defects that the surface is easy to oxidize and the particles are easy to agglomerate, which greatly reduces its reduction activity and adsorption capacity. In order to solve this problem, some people change the shape of chitosan and modify the surface of chitosan, as in "Analytical Chemistry Research Bulletin", Volume 37, Issue 2, pages 275-278 published in February 2009 It was introduced in "Preparation and chromatographic detection of iron nanowire / chitosan / antibody bioprobe". It is first to electrochemically polish and clean the aluminum foil, then use the anodic oxidation method to obtain the alumina template, and then use the electrodeposition m...

Claims

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Application Information

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IPC IPC(8): C30B29/52C30B29/62C30B30/02C30B33/00B01J20/24B01J20/28B01J20/30B01D15/08
Inventor 孙利袁志刚张立德田越陈永洲张俊喜
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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