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TiO2 nano particle/TiO2 nanotube array and application thereof

A nanotube array and nanoparticle technology, which is applied in chemical/physical processes, surface reaction electrolytic coatings, physical/chemical process catalysts, etc., can solve the problem of low photocatalytic efficiency and electron transmission efficiency, and easy shedding of nanotube arrays, etc. problems, to achieve the effect of improving photocatalytic degradation efficiency, increasing light source irradiation, and improving photocatalytic degradation rate

Inactive Publication Date: 2013-09-11
CHONGQING THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] TiO traditionally prepared on titanium sheets 2 The nanotube array is very easy to fall off, and the photocatalytic efficiency and electron transport efficiency are not high

Method used

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  • TiO2 nano particle/TiO2 nanotube array and application thereof
  • TiO2 nano particle/TiO2 nanotube array and application thereof
  • TiO2 nano particle/TiO2 nanotube array and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1TiO 2 Nanoparticles / TiO 2 Fabrication of nanotube arrays

[0043] (1) Pretreatment of titanium wire

[0044] Take a metal titanium wire with a diameter of 2cm and a length of 30cm. After polishing it smoothly, it is ultrasonicated in acetone, isopropanol, methanol, and distilled water for 10 minutes. After natural drying, it is polished in a polishing solution for 1 minute, and then deionized water. Clean and dry naturally in the air, wherein the polishing liquid is made of HF, HNO 3 and H 2 O is composed of 1:3:4 according to the volume ratio;

[0045] (2) TiO 2 Fabrication of nanotube arrays

[0046] Immerse the titanium wire pretreated in step (1) into the electrolyte as the anode, in which the metal titanium wire is immersed in a length of 20cm, and the stainless steel wire is used as the cathode, and the distance between the anode and the cathode is 2cm; the program boost method is adopted Raise to 70V, anodize for 3 hours; rinse the titanium wire w...

Embodiment 2

[0060] Example 2TiO 2 Nanoparticles / TiO 2 Fabrication of nanotube arrays

[0061] (1) Pretreatment of titanium wire

[0062] Take a metal titanium wire with a diameter of 0.02cm and a length of 25cm. After polishing it smoothly, ultrasonically clean it in acetone, isopropanol, methanol, and distilled water for 10 minutes. After natural drying, polish it in a polishing solution for 2 minutes, and then deionize it. Wash with water and dry naturally in the air, wherein the polishing liquid is made of HF, HNO 3 and H 2 O is composed of 1:3:4 according to the volume ratio;

[0063] (2) TiO 2 Fabrication of nanotube arrays

[0064] Immerse the titanium wire pretreated in step (1) into the electrolyte as the anode, in which the metal titanium wire is immersed in a length of 15cm, and the stainless steel wire is used as the cathode, and the distance between the anode and the cathode is 3cm; the programmed voltage increase method is adopted Raise to 90V, anodize for 2 hours; rin...

Embodiment 3

[0074] Example 3TiO 2 Nanoparticles / TiO 2 Fabrication of nanotube arrays

[0075] (1) Pretreatment of titanium wire

[0076] Take a metal titanium wire with a diameter of 3cm and a length of 25cm. After polishing it smoothly, it is ultrasonicated in acetone, isopropanol, methanol, and distilled water for 10 minutes. After natural drying, it is polished in a polishing solution for 3 minutes, and then deionized water. Clean and dry naturally in the air, wherein the polishing liquid is made of HF, HNO 3 and H 2 O is composed of 1:3:4 according to the volume ratio;

[0077] (2) TiO 2 Fabrication of nanotube arrays

[0078] Immerse the titanium wire pretreated in step (1) into the electrolyte as the anode, in which the metal titanium wire is immersed in a length of 20 cm, and the stainless steel wire is used as the cathode, and the distance between the anode and the cathode is 0.7 cm; the voltage is increased by a program After the reaction, rinse the titanium wire with deio...

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Abstract

The invention aims at providing a TiO2 nano particle / TiO2 nanotube array, which is prepared by the following methods of: firstly, carrying out pretreatment on a metal titanium silk, preparing the TiO2 nanotube array at the surface of the metal titanium silk by adopting an electrochemical anodic oxidation method; dipping the obtained TiO2 nanotube array in TiO2 nano-particle sol once; and finally burning at a high temperature, so as to obtain the TiO2 nano particle / TiO2 nanotube array. The TiO2 nano particle / TiO2 nanotube array disclosed by the invention can be used as a photoelectric catalyst to effectively degrade a methyl orange solution.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalysis, in particular to a TiO 2 Nanoparticles / TiO 2 Nanotube arrays and their applications in the field of photocatalytic degradation of organic matter. Background technique [0002] TiO 2 Under the excitation of ultraviolet light, photogenerated electrons and photogenerated holes can be formed. The photogenerated electrons have a strong reducing ability, and the photogenerated holes have a strong oxidizing ability; the photogenerated electrons and photogenerated holes can be adsorbed on TiO 2 Surface O 2 , H 2 O, OH - etc. to generate highly oxidizing hydroxyl radicals and degrade organic matter[1,2]. While traditional TiO 2 Photocatalysts have disadvantages such as low quantum efficiency, low utilization rate of solar energy, and difficult recovery of powder after utilization [2-4]. But TiO 2 Nanotube arrays with TiO 2 Nano-powders have unique advantages compared to: ① Larger...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C25D11/26A62D3/115A62D101/28
Inventor 武凯
Owner CHONGQING THREE GORGES UNIV
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