Preparation method of hydroxylation titanium oxide/graphene visible light catalysis material

Abstract

The invention relates to a preparation method of a surface hydroxylation titanium oxide / graphene visible light catalysis material. According to the method, butyl titanate, graphene and nitrate serve as raw materials, organic electrolyte serves as surfactant, and the surface hydroxylation graphene / TiO<2> catalysis material is obtained through the steps of sol application, thermostatic water bath, ultraviolet irradiation, microwave irradiation, washing, drying and the like. The preparation method has the greatest advantage that ultraviolet pre-oxidation and microwave irradiation are utilized for achieving surface hydroxylation, the preparation process is simple, the energy consumption is low, rapid synthesis can be achieved, and large-scale production is easy to achieve; meanwhile, more defects such as oxygen vacancy and Ti<3+> are caused to a composite by surface hydroxylation, surface activity is increased, forbidden bandwidth of the composite is decreased, the spectral response range is widened, the obtained graphene / TiO<2> catalysis material is great in absorption performance and high in activity, durability and antibacterial performance, and the preparation method has a wide application prospect in fields such as sewage treatment, photocatalytic water splitting, air purification, solar cells, antibacterial materials and the like.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and relates to a method for preparing a hydroxylated titanium oxide / graphene visible light catalytic material. Background technique [0002] Photocatalytic technology is a new type of environmental protection technology. Photocatalytic materials can directly use sunlight to degrade organic matter, with low energy consumption, no secondary pollution and complete degradation. It is expected to provide a cheap and feasible way to solve increasingly serious environmental problems. Titanium oxide (TiO 2 ) rich and cheap raw materials, good weather resistance, acid and alkali corrosion resistance, high thermal and chemical stability, semiconductor photosensitivity and other unique properties, can absorb or shield ultraviolet light well, and excite after absorbing light energy The electrons (holes) have strong reducing ability (oxidation), and have broad application prospects in the fields of se...

AI Technical Summary

Problems solved by technology

[0003] Although graphene as a carrier can improve TiO 2 photocatalytic performance, but in the composite system, only the large specific surface area of ​​graphene is used to disperse TiO 2 and good electrical conductivity to promote the separation of photogenerated electrons and holes, which itself does not have photocatalytic activity, so in broadening the TiO 2 are limited in terms of spectral response range and enhanced catalytic activity

In addition, the current preparation of graphene / TiO 2 Most of the methods have harsh reaction conditions, complex processes, long synthesis cycles, and high costs, which are not conducive to large-scale production, which greatly limits the development of graphene / TiO 2 Practical Applications of Catalytic Materials

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