Novel nickel oxide photocatalyst loaded on porous anodic aluminum oxide

Abstract

The invention discloses a novel nickel oxide photocatalyst loaded on porous anodic aluminum oxide, and belongs to the technical field of organic dye wastewater degradation. The novel nickel oxide photocatalyst comprises a porous anodic aluminum oxide substrate and a nickel oxide film covered on the surface of the porous anodic aluminum oxide substrate. The preparation process of the porous anodicaluminum oxide substrate is a standard two-step anodic oxidation process, and the nickel oxide film covering the surface is prepared by adopting a self-organizing growth method and a precursor roasting mode. The photocatalyst is applied to photocatalytic degradation of organic dyes and has a good effect on degradation of the organic dyes. The nickel oxide photocatalyst loaded on the porous anodicaluminum oxide substrate is prepared by adopting the self-organization method, the preparation method of the loaded catalyst is economical and simple, and the prepared photocatalyst has the advantagesof being stable, good in dispersity, easy to recycle, capable of being repeatedly used and the like.

Description

technical field [0001] The invention belongs to the technical field of degradation of organic dye wastewater, and in particular relates to the preparation of a nickel oxide photocatalyst loaded on porous anodic aluminum oxide. Background technique [0002] With the rapid development of modern science and technology, in some places, especially in developing countries and poor and backward areas, water pollution has become increasingly serious, which has brought great harm to the natural environment and people's lives. Effective measures to deal with water Pollution is critical and very urgent. Generally speaking, the main water pollutants are: domestic pollutants, agricultural pollutants, industrial pollutants, surface water pollution caused by mining operations, etc. As the main source of pollution, industrial wastewater usually contains a variety of harmful organic compounds and toxic substances, such as aromatic hydrocarbons, pesticides, heavy metal ions, etc. If it is di...

AI Technical Summary

Problems solved by technology

Titanium dioxide, as the most common semiconductor photocatalyst, has been widely studied, but due to its characteristics of easy deactivation, difficult recovery, and low utilization rate of light energy, it is rarely used in actual pollution control.

Some researchers found that when studying the photocatalytic activity of nickel oxide, nickel oxide particles can easily adsorb most pollutant molecules due to their polar surface, and found that nano-nickel / nickel oxide particles can form superoxide radicals under light, It can enhance the efficiency of photocatalytic degradation, but the nickel oxide photocatalyst of micronano size is often difficult to recycle after practical application, and nickel oxide is carcinogenic, which is very easy to cause secondary pollution. In addition, the micronano nickel oxide particles have poor dispersion, Disadvantages such as easy aggregation are not conducive to the treatment of organic dye wastewater

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