Method for doping magnetic particles of ferroferric oxide in titanium dioxide nanotube

A technology of triiron tetroxide and titanium dioxide, used in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of toxic solvents, complex preparation processes, and high reaction temperatures, and achieve shortened reaction time and chemical properties. Stable, easy-to-use effects

Inactive Publication Date: 2010-12-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods often have many deficiencies, such as (1) high reaction temperature; (2) long reaction time; (3) complex preparation process; (4) the solvent required for the preparation is toxic and expensive

Method used

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  • Method for doping magnetic particles of ferroferric oxide in titanium dioxide nanotube
  • Method for doping magnetic particles of ferroferric oxide in titanium dioxide nanotube
  • Method for doping magnetic particles of ferroferric oxide in titanium dioxide nanotube

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Effect test

Embodiment 1

[0024] (1) A two-electrode system (titanium sheet for the anode and platinum sheet for the cathode), electrolyte concentration: glycerol: water volume ratio 1:1, NH 4 The concentration of F is 0.27mol / L, the voltage is 35V, and the time is 3h, the self-assembled TiO 2 nanotube.

[0025] (2) A three-electrode system is adopted (the cathode is prepared with TiO 2 Titanium sheets of nanotubes, the anode is a platinum sheet, and the reference electrode uses a calomel electrode), the concentration of the electrolyte: the volume ratio of glycerol: water is 1:1, FeCl 3 The concentration is 0.02mol / L, the voltage is -3V, and the time is 15min, that is, in TiO 2 Nano ferromagnetic particles uniformly distributed on the surface of the nanotube.

Embodiment 2

[0027] (1) A two-electrode system is used (the anode is Ti-Zr-Nb alloy, wherein the atomic molar ratio of Ti, Zr and Nb is 73:2:25, and the cathode is platinum sheet), the electrolyte concentration: the volume ratio of glycerol: water 1:1, NH 4 The concentration of F is 0.27mol / L, the voltage is 35V, and the time is 3h, the self-assembled TiO 2 nanotube.

[0028] (2) A three-electrode system is adopted (the cathode is prepared with TiO 2 Titanium alloy sheets of nanotubes, the anode is a platinum sheet, and the reference electrode uses a calomel electrode), the concentration of the electrolyte: the volume ratio of glycerol: water is 1:1, FeCl 3 The concentration is 0.02mol / L, the voltage is -3V, and the time is 30min, that is, in TiO 2 Nano ferromagnetic particles uniformly distributed on the surface of the nanotube.

Embodiment 3

[0030] (1) A two-electrode system (titanium sheet for the anode and platinum sheet for the cathode), electrolyte concentration: glycerol: water volume ratio 1:1, NH 4 The concentration of F is 0.3mol / L, the voltage is 30V, and the time is 3h, the self-assembled TiO 2 nanotube.

[0031] (2) A three-electrode system is adopted (the cathode is prepared with TiO 2 Titanium sheets of nanotubes, the anode is a platinum sheet, and the reference electrode uses a calomel electrode), the concentration of the electrolyte: the volume ratio of glycerol: water is 1:1, FeCl 3 The concentration is 0.02mol / L, the voltage is -3V, and the time is 45min, that is, in TiO 2 Nano ferromagnetic particles are evenly distributed on the surface of the nanotube.

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Abstract

The invention discloses a method for doping magnetic particles in a titanium dioxide nanotube with an easy preparation process, which is implemented according to the following steps: (1) using a two-electrode system to prepare the titanium dioxide nanotube; and (2) carrying out electrochemical deposition on the magnetic particles by a three-electrode system. Compared with the traditional method for preparing the magnetic particles, the method of the invention mainly has the advantages that: (1) the defect of agglomeration of magnetic particles is overcome to cause the magnetic particles to be evenly distributed on the nanotube; (2) the reaction time is greatly shortened, and the operation is simple; (3) the size of the diameter of the magnetic particles can be effectively controlled; and (4) the magnetic particles can be firmly adhered on the substrate of a TiO2 nanotube. The magnetic particles have stable chemical property and stronger magnetic filed response, wherein the saturation magnetization intensity Ms, remanence Mr and coercivity Hc can respectively reach 41.8emu/g, 2.66emu/g and 123Oe.

Description

technical field [0001] The invention relates to a method for modifying materials, more specifically, relates to a method for modifying nanometer materials using an electrochemical method. Background technique [0002] In recent years, titanium dioxide nanotubes have gradually become a research hotspot at home and abroad due to their excellent properties such as low preparation cost, large specific surface area, regular surface morphology, good photostability and chemical inertness. One of the important application areas is the use of self-doping method in TiO 2 The surface of the nanotubes is doped with various metals or nonmetals such as N, C, S, and Nb, Cr, Au, etc. to improve the photocatalytic efficiency of the nanotubes. There are also many researchers who have focused the development of drug carriers on nanoscale tubular structures and hollow particle structures, so as to be widely used in magnetic drug delivery systems, medical diagnosis, and AC magnetic field-assist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 梁砚琴杨贤金崔振铎朱胜利
Owner TIANJIN UNIV
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