Nanorod array thin-film type photocatalyst and use thereof

Abstract

The invention discloses a nanorod array thin-film type photocatalyst. Preparation of the nanorod array thin-film type photocatalyst includes the following steps that first, fluorine-doped tin dioxide(FTO) conductive glass is used as a substrate and put into a polytetrafluoroethylene inner container of a high-pressure reactor, reaction precursor liquid formed by mixing deionized water and butyl titanate is added to the inner container, and the inner container is put into an oven at the temperature raised to 150 DEG C of the high-pressure reactor for a reaction, and then a product is taken out,cooled, rinsed, and dried at the room temperature; and second, a mixed solution of Fe(NO3)3, NiNO3 and Zn(NO3)2 is prepared with the stoichiometric ratio being 2 to 0.5 to 0.5, a prepared TiO2NRAs film is dipped in the mixed solution, taken out, dried and calcined through a muffle furnace, and the catalyst TiO2NRAs / Ni0.5Zn0.5Fe2O4 is obtained. The invention further discloses application of the catalyst to the treatment of wastewater containing unsymmetrical dimethylhydrazine. The catalyst has the advantages of high efficiency, energy saving, recycling and reusing, low operating cost and the like.

Description

technical field [0001] The invention relates to the field of waste water pollutant treatment, in particular to a nanorod array thin-film photocatalyst and its application. Background technique [0002] Unsymmetrical dimethylhydrazine (UDMH) has the characteristics of high specific impulse, and is widely used as liquid propellant for missile weapons and satellite launch vehicles. With the rapid development of my country's military field and civil aerospace industry, a large amount of unsymmetrical dimethylhydrazine has inevitably caused serious environmental pollution problems, especially the wastewater containing unsymmetrical dimethylhydrazine, which poses an unavoidable threat to the environment and human health. Underestimated, the treatment of unsymmetrical dimethylhydrazine sewage has attracted great attention from relevant departments. [0003] At present, the treatment of UDMH-containing wastewater is mainly divided into physical, biological and chemical methods. Amo...

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Problems solved by technology

Among them, physical methods mainly use adsorption and other principles to separate UDMH molecules in water, but there are generally problems of low processing capacity and subsequent secondary treatment; biological methods mainly use active microorganisms or aquatic plants to degrade UDMH molecules in water. , but due to the harsh living conditions of organisms, it is easy to inactivate when treating UDMH-containing wastewater, and research shows that biological methods have low treatment capacity and a long cycle; chemical methods mainly use oxidation or reduction processes to treat UDMH molecules in water, but There are common problems of high energy consumption and high cost, and the added salts such as Cu, Fe, and Co are difficult to recycle, which is likely to cause secondary pollution of water bodies