Preparation method of copper oxide/titanium dioxide composite nanotube arrays

A nanotube array, titanium dioxide technology, applied in nanotechnology, liquid chemical plating, electrolytic coatings, etc., can solve the problems of troublesome powder catalyst recycling, low catalytic efficiency, low catalytic ability, etc., to improve photocatalysis effect, improve the catalytic effect, and complete the growth of the crystal structure

Inactive Publication Date: 2016-08-31
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, titanium dioxide photocatalysts still have many disadvantages, such as: 1. Common powder catalysts are troublesome to recycle; 2. The catalytic efficiency is not high enough; 3. The catalytic ability of the catalyst decreases after long-term use
The publication number is CN102240550A Chinese invention patent discloses "low-concentration coppe

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  • Preparation method of copper oxide/titanium dioxide composite nanotube arrays
  • Preparation method of copper oxide/titanium dioxide composite nanotube arrays
  • Preparation method of copper oxide/titanium dioxide composite nanotube arrays

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Example Embodiment

[0029] Example 1

[0030] A method for preparing a copper oxide / titanium dioxide composite nanotube array, comprising the following steps:

[0031] (1) Anodization: Cut the titanium sheet into small pieces, clean the surface, and anodize in the electrolyte for a period of time to obtain a titanium dioxide nanotube array, wherein the electrolyte is a solution with a volume ratio of glycerol and water of 5:1, and at the same time Ammonium fluoride with a mass fraction of 0.5% is dissolved in the electrolyte; during anodization, the cleaned titanium sheet is used as the anode, connected to the positive electrode of the power supply; the graphite electrode is used as the cathode, connected to the negative electrode of the power supply, and the temperature of the electrolyte is 20°C. The time is 4h, the electrolysis voltage is 40V;

[0032] (2) Chemical deposition: the prepared nanotube arrays are immersed in soluble copper sulfate solution, and the standing time is 40s, then the ...

Example Embodiment

[0034] Example 2

[0035] A method for preparing a copper oxide / titanium dioxide composite nanotube array, comprising the following steps:

[0036] (1) Anodization: Cut the titanium sheet into small pieces, clean the surface, and anodize in the electrolyte for a period of time to obtain a titanium dioxide nanotube array, wherein the electrolyte is a solution with a volume ratio of ethylene glycol and water of 8:1, and at the same time Sodium fluoride with a mass fraction of 1.0% is dissolved in the electrolyte; during anodization, the cleaned titanium sheet is used as the anode, connected to the positive electrode of the power supply; the graphite electrode is used as the cathode, connected to the negative electrode of the power supply, and the temperature of the electrolyte is 30 ° C. The time is 8h, the electrolytic voltage is 50V;

[0037] (2) chemical deposition: the prepared nanotube arrays are immersed in the cupric chloride solution, the standing time is 60s, then the ...

Example Embodiment

[0039] Example 3

[0040] A method for preparing a copper oxide / titanium dioxide composite nanotube array, comprising the following steps:

[0041] (1) Anodization: Cut the titanium sheet into small pieces, clean the surface, and anodize in the electrolyte for a period of time to obtain a titanium dioxide nanotube array, wherein the electrolyte is a solution with a volume ratio of dihydroxyacetone and water of 6.5:1, At the same time, potassium fluoride with a mass fraction of 0.75% was dissolved in the electrolyte; during anodization, the cleaned titanium sheet was used as the anode, connected to the positive electrode of the power supply; the graphite electrode was used as the cathode, connected to the negative electrode of the power supply, and the temperature of the electrolyte was 25°C. The electrolysis time is 6h, and the electrolysis voltage is 45V;

[0042](2) chemical deposition: the prepared nanotube array is immersed in copper nitrate solution, and the standing tim...

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Abstract

The invention provides a preparation method of copper oxide/titanium dioxide composite nanotube arrays. The copper oxide/titanium dioxide composite nanotube arrays have the methyl orange decomposing capacity in the ultraviolet light. The preparation method of the copper oxide/titanium dioxide composite nanotube arrays includes the following steps that (1) anodizing is conducted, specifically, titanium dioxide nanotube arrays are prepared through an anodic oxidation method; (2) chemical precipitation is carried out, specifically, the nanotube arrays are soaked in copper salt and alkali liquor alternately, and copper oxides are doped; and (3) annealing is carried out, specifically, the nanotubes compounded with the copper oxides after the reaction are subjected to annealing, so that an anatase type titanium dioxide nanotube catalyst is obtained. The nanotube catalyst can be used repeatedly; the preparation method is simple, low in cost and free of pollution, and other preparation processes are better in energy saving; and a cathode of an electrolytic tank is low in cost and can be used repeatedly. According to the preparation method, anatase crystal type titanium dioxide is obtained after the nanotube arrays are subjected to annealing at the proper temperature, the catalytic efficiency is higher, the structure is firmer, and the situations that after long-term use, nanotube arrays adhering to a titanium sheet substrate fall down and the catalytic efficiency is greatly reduced are avoided.

Description

【Technical field】 [0001] The invention relates to the technical field of nanotube preparation, in particular to a method for preparing a copper oxide / titanium dioxide composite nanotube array. 【Background technique】 [0002] The problem of environmental pollution is one of the major problems facing modern society, and the problem of organic matter pollution is a part that cannot be ignored. Using the free radicals with strong oxidation-reduction ability generated by photocatalysts under light can degrade almost all organic matter, so using the present invention to treat organic pollutants is an easy-to-operate and less prone to secondary pollution solution to the problem of organic matter pollution Methods. [0003] As early as 1972, Professor Kenichi Honda of the University of Tokyo published a paper describing the phenomenon that titanium dioxide can decompose water into oxygen and hydrogen under the irradiation of ultraviolet light. Since then, photocatalysts have been ...

Claims

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Application Information

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IPC IPC(8): C25D11/26C23C18/40C23C8/10B82Y40/00
CPCC25D11/26B82Y40/00C23C8/10C23C18/40
Inventor 兰宇卫易其磊刘锦玲黄艳桃
Owner GUANGXI UNIV
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