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Method for preparing semimetallic state conductive titanium black nano-tube array

A technology of nanotube array and conductive titanium oxide, which is applied in the direction of nanotechnology, can solve the problems of difficult electron transfer, harsh conditions, restrictions, etc., and achieve the effect of overcoming difficult control conditions, mild reaction conditions, and changing conductivity

Inactive Publication Date: 2014-09-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that its lattice doping conditions are relatively harsh, and high-temperature heat treatment is likely to cause damage to the ordered structure; in addition, titanium dioxide is a semiconductor, and its electrical conductivity is poor, which also makes it difficult to transfer electrons, which limits its use as a lithium-ion battery. Application and development of materials, photoelectric conversion and other functional materials
[0004] It has been reported in the literature that titanium dioxide nanotube arrays can be used as precursors to obtain conductive titanium dioxide nanotube arrays in a hydrogen atmosphere containing a small amount of acetylene at 800-1000 degrees Celsius. The array collapses and the ordered structure is destroyed

Method used

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  • Method for preparing semimetallic state conductive titanium black nano-tube array
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  • Method for preparing semimetallic state conductive titanium black nano-tube array

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Effect test

Embodiment 1

[0027] The titanium sheet is used as the anode, the platinum electrode is used as the cathode, the electrolyte is an ethylene glycol organic system (0.3%wt ammonium fluoride, 4%vol deionized water and 96%vol ethylene glycol solution), and a DC voltage of 40V is applied. Under stirring conditions, anodize for 4 hours, then ultrasonically peel off the nano-titanium dioxide film from the first anodic oxidation, and then perform the second anodic oxidation according to the process conditions and electrolyte of the first anodic oxidation, and the second oxidation time is 1 hour. Then, the prepared nano-titanium dioxide sample is washed with distilled water and dried in nitrogen to obtain a titanium dioxide nanotube array with uniform distribution, orderly arrangement and uniform tube diameter. Then heat-treat the prepared titanium dioxide nanotube array at 350° C. for 3 hours to obtain anatase titanium dioxide nanotube array with complete crystal form. Measure its resistance with a...

Embodiment 2

[0029] The titanium sheet is used as the anode, the platinum electrode is used as the cathode, the electrolyte is an ethylene glycol organic system (0.3% wt ammonium fluoride, 4% vol deionized water and 96% vol ethylene glycol solution), and a DC voltage of 60V is applied. Under stirring conditions, anodize for 3 hours, then ultrasonically peel off the nano-titanium dioxide film anodized for the first time, and then perform the second anodic oxidation according to the process conditions and electrolyte of the first anodic oxidation, and the second anodic oxidation for 1 hour. Then, the prepared nano-titanium dioxide sample was washed with distilled water and dried in nitrogen to obtain a titanium dioxide nanotube array with uniform distribution, orderly arrangement and uniform tube diameter, and its resistance was measured by a multimeter to be greater than 20 MΩ. Then heat-treat the prepared titanium dioxide nanotube array at 450° C. for 2 hours to obtain anatase titanium diox...

Embodiment 3

[0031] The titanium sheet is used as the anode, the platinum electrode is used as the cathode, the electrolyte is an ethylene glycol organic system (0.3% wt ammonium fluoride, 4% vol deionized water and 96% vol ethylene glycol solution), and a DC voltage of 80V is applied. Under stirring conditions, anodize for 2 hours, then ultrasonically peel off the nano-titanium dioxide film from the first anodic oxidation, and then perform the second anodic oxidation according to the process conditions and electrolyte of the first anodic oxidation, and anodize for 1 hour. Then the prepared nano-titanium dioxide sample was washed with distilled water and dried in nitrogen to obtain a titanium dioxide nanotube array with uniform distribution, orderly arrangement and uniform tube diameter. The resistance was measured by a multimeter to be greater than 21MΩ. Then heat-treat the prepared titanium dioxide nanotube array at 500° C. for 1.5 hours to obtain anatase titanium dioxide nanotube array w...

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Abstract

The invention discloses a method for preparing a semimetallic state conductive titanium black nano-tube array. According to the preparation method, the raw material titanium sheet is oxidized by an electrochemical method to prepare a titanium dioxide nano-tube array firstly, and the semimetallic state conductive titanium black nano-tube array is further prepared by in-situ reduction and doping. The preparation method is mild in reacting condition and simple in process, and the prepared semimetallic state conductive titanium black nano-tube array is orderly and has a complete nonrandom structure and good electrochemical performance.

Description

technical field [0001] The invention relates to a method for preparing a semi-metallic conductive titanium dioxide nanotube array, which belongs to the field of nanomaterial preparation. Background technique [0002] Semi-metallic conductive titanium oxide (general formula Ti n o 2n-1 (4≤n≤10)), has good electrical conductivity at room temperature, especially Ti 4 o 7 , its single crystal conductivity is 1500S cm -1 . In terms of chemical properties, compared with general industrial electrode materials, semi-metallic titanium oxide has high chemical stability and corrosion resistance; and the overpotential of hydrogen evolution and oxygen evolution is high, and it has good electrochemical performance as both cathode and anode. performance. The above attributes endow it with broad application prospects in the fields of chlor-alkali industry, environmental treatment (anodization), chemical power sources (lead-acid batteries, fuel cells, zinc-nickel batteries, etc.). It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B82Y40/00
Inventor 桑商斌刘颖颖伍秋美钟文洁刘文明
Owner CENT SOUTH UNIV
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