Method for cyclically preparing nano flower-shaped titanium dioxide by using chloride ion liquid

Abstract

The invention discloses a method for cyclically preparing nano flower-shaped titanium dioxide by using chloride ion liquid. According to the preparation method, a chloride ion liquid and an organic solvent are used as hydrolysate of tetrabutyl titanate, the chloride ion liquid and the organic solvent are subsequently recycled through cyclic cleaning and participate in hydrothermal synthesis of titanium dioxide again, so that the purpose of cyclically preparing titanium dioxide is achieved. The prepared titanium dioxide material is in a nanoflower shape and shows good photocatalytic hydrogen production capability.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide preparation and photocatalysis, in particular to a method for preparing nanometer flower-shaped titanium dioxide by utilizing chloride ion liquid circulation. Background technique [0002] Titanium dioxide is the most widely studied photocatalyst, which has the advantages of environmental protection, stable chemical properties, and low cost. In recent years, the development of titanium dioxide in the fields of photocatalyst and sewage purification has gradually matured, but it is still limited by electrons and ions in practical applications. The low conductivity limits, which in turn affects the photocatalytic reaction efficiency. People often use methods such as morphology and structure design, nanometer size regulation, metal doping and material compounding to improve the poor conductivity of titanium dioxide. However, the use of metal doping and material compounding will not only incr...

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Problems solved by technology

[0002] Titanium dioxide is the most widely studied photocatalyst, which has the advantages of environmental protection, stable chemical properties, and low cost. In recent years, the development of titanium dioxide in the fields of photocatalyst and sewage purification has gradually matured, but it is still limited by electrons and ions in practical applications. Low electrical conductivity limits, which in turn affects photocatalytic reaction efficiency

However, the use of metal doping and material compounding will not only increase the production cost of titanium dioxide, but also prone to problems such as particle agglomeration, difficulty in dispersing, and poor interfacial compounding effect, which will reduce the conductivity of the material; Size control treatment often adds a variety of reagents, which is easy to produce by-products, which not only reduces the yield of titanium dioxide, but also may pollute the environment. Therefore, it is still necessary for us to continue to explore the use of a suitable method to prepare titanium dioxide.

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