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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. To achieve the effect of improving the photoelectric catalytic degradation efficiency, increasing the light source irradiation, and improving the photoelectric catalytic degradation rate

Inactive Publication Date: 2015-04-22
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 Patents(China)
IPC IPC(8): B01J21/06C25D11/26A62D3/115A62D101/28
Inventor 武凯
Owner CHONGQING THREE GORGES UNIV
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