Preparation of TiO2 Nanoelectrode and Its Application for Photoelectrochemical Catalytic Degradation of Malachite Green

Dye wastewater is a kind of industrial organic wastewater with large chroma and complex composition, and biochemical treatment is difficult to conduct. The discharge of dye wastewater will cause serious harm to water environment and human health. Electro-photocatalytic technology has received extensive social attention in the degradation of pollutants. Compared with the traditional physical, chemical and biochemical methods, it has the advantages of high efficiency, simple operation, non-selective degradation of environmental pollutants, and simple process equipment. Electrochemical anodic oxidation is a better method for the preparation of nanotube arrays. The electrode structure is stable and firmly bonded with the substrate. Therefore, in this work, TiO2 nanotube arrays with different tube lengths were prepared by electrochemical anodic oxidation, and the effects of NaSO4 solution concentration, voltage, initial pH value and initial concentration on electro-photocatalytic degradation of malachite green were investigated.