Method for preparing N-doped nano flower-shaped TiO2 photocatalysis material by taking carbonized lotus leaf as substrate

Abstract

The invention discloses a method for preparing a N-doped nano flower-shaped TiO2 photocatalysis material by taking carbonized lotus leaf as a substrate. The method is characterized in that tetra-n-butyl titanate is loaded at the carbonized lotus leaf, and an obtained product is subjected to calcining to prepare the TiO2 microcrystal-loaded carbonized lotus leaf substrate; in-situ growth of a TiO2crystal layer is carried out at the TiO2 microcrystal-loaded carbonized lotus leaf substrate, and the nano flower-shaped TiO2 photocatalysis material at the carbonized lotus leaf is prepared; N dopingtreatment is carried out on the nano flower-shaped TiO2 photocatalysis material at the carbonized lotus leaf, and the N-doped nano flower-shaped TiO2 photocatalysis material is obtained. The preparation method has the advantages of simple process, low cost, and easy large-scale production, the prepared catalysis material prevents characteristics of ordered structure and morphology fixing, and hasthe advantages of wide spectrum response scope and high photocatalytic activity.

Description

technical field [0001] The invention relates to a method for preparing TiO 2 The method for photocatalytic materials, specifically, relates to a kind of preparation of N-doped nano-flower-like TiO on the basis of carbonized lotus leaves. 2 A photocatalyst method belongs to the technical field of photocatalysis. Background technique [0002] TiO 2 It is a representative of semiconductor catalysts, with high activity, low cost, environmental protection and good stability, and is currently widely used in the field of photocatalytic degradation technology. The photocatalytic degradation mechanism of semiconductor catalysts is: under light with a given wavelength, semiconductor catalysts can generate photogenerated electrons and holes, and can generate active free radicals containing oxidation or reduction in the solution, and the generated active free radicals can convert organic Dyes or pollutants degrade to carbon dioxide, water and other small molecules. However, TiO 2 I...

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Problems solved by technology

Although the dispersibility of the above-mentioned supported catalyst is improved compared with previous catalysts, the preparation method of the above-mentioned catalyst is relatively complicated and the production cost is high, which is not conducive to large-scale production, and the obtained supported catalyst is generally amorphous. TiO 2 The combination of the catalyst layer and the support is not strong, which limits the TiO 2 Practical use of photocatalysts

[0006] Lotus leaves, also known as lotus stems and lotus stems, are the leaves of the perennial herbaceous emergent lotus lotus of the genus Lily. Carbonized lotus leaves were obtained by leaf carbonization, and then N-doped nanoflower-like TiO was prepared on the basis of carbonized lotus leaves. 2 Related reports on photocatalytic materials

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