Preparation method of copper oxide/titanium dioxide composite nanotube arrays

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 ...

AI Technical Summary

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 copper-doped titanium dioxide nanotube photocatalyst and its preparation method". The invention obtains titanium dioxide nanotube catalyst through anodization, electrodeposition and calcination, but it uses electrodeposition Increased energy consumption, in addition, its calcination temperature is above 500 °C, and the catalytic effect is greatly reduced

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