Preparation method and application of MnTiO3 and F-MnTiO3

Abstract

The invention discloses a preparation method and application of MnTiO3 and F-MnTiO3. According to a hydro-thermal synthesis method which is taken as the preparation method, titanate nanowires are taken as a Ti source, MnCl2 is taken as a Mn source, NaF is taken as an F source; the hydro-thermal synthesis method can be used for preparing the MnTiO3 and the F-MnTiO3 which are uniform in feature and diameter and of sheet-shaped structures on the condition of adding NaOH; and the MnTiO3 and the F-MnTiO3 are catalyzed and degraded to obtain organic dyestuff named rhodamine B under the irradiation of visible light. The MnTiO3 and the F-MnTiO3 both have catalytic degradation performance under visible light, and the F-MnTiO3 has higher catalytic performance than the MnTiO3 since an F element is doped in the F-MnTiO3 material, wherein F is an element with greatest electronegativity and can be combined with photoproduction electrons to restrain the combination of the photoproduction electrons and electron holes and further improve the photocatalytic efficiency of visible light. The preparation method provided by the invention is safe and rapid and is high in stability.

Description

technical field [0001] The invention relates to visible light photocatalytic materials, especially MnTiO 3 and F-MnTiO 3 The preparation method, and MnTiO 3 and F-MnTiO 3 Application of nano visible light photocatalytic material in catalytic degradation of organic dye rhodamine B under visible light. Background technique [0002] In recent years, with the development of industry, environmental problems and energy crisis have become two bottlenecks restricting human development. With the rapid development of global industrialization, the excessive development of energy and the deterioration of the ecological environment, it has become the consensus of the international community to protect the environment, maintain ecological balance and achieve sustainable development. Photocatalytic technology is expected to be a solution to the crisis of fossil energy depletion, and photocatalytic degradation to remove toxic organic pollutants will economically solve environmental prob...

AI Technical Summary

Problems solved by technology

However, after nearly 40 years of extensive and in-depth research, photocatalytic technology is still difficult to achieve efficient and cheap solar energy conversion, the main reason is that TiO 2 The representative semiconductor photocatalyst generally has a large band gap (anatase TiO 2 The band gap of 3.2eV, rutile TiO 2 The forbidden band width is 3.02eV), and can only absorb ultraviolet light in sunlight, while ultraviolet light with a wavelength below 400nm is less than 5% of the total energy of the sun, and visible light, which accounts for about 43% of the total energy of sunlight, is mainly concentrated at 400 nm. -700nm band

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