Transition metal in-situ doped TiO2 catalyst as well as preparation method and application thereof

Abstract

The invention relates to a transition metal in-situ doped TiO2 catalyst as well as a preparation method and application thereof. H2Ti3O7 is used as a raw material, ion exchange is carried out in a transition metal cation aqueous solution to obtain an MxH2-xTi3O7 precursor, H2-xTi3O7 is converted into a TiO2 matrix through high-temperature calcination, exchanged Mn < + > is doped into a TiO2 crystal lattice in situ in a transition metal monatomic or polyatomic form, and the transition metal atom in-situ doped M-TiO2 material on an atomic level is prepared. The preparation method is simple in process route, simple and convenient to operate, high in dispersion degree of doped ions, good in uniformity, simple in required equipment and easy to amplify production, and the prepared transition metal in-situ doped M-TiO2 catalyst material shows better application prospects in the fields of water treatment, catalytic oxidation, energy storage, sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a transition metal in-situ doped TiO 2 Catalyst, preparation method and application. Background technique [0002] TiO 2 The material is a common industrial raw material, not only low in price, non-toxic and pollution-free, high temperature resistance, acid and alkali resistance, stable chemical properties, and strong interaction with metals, it is an ideal catalyst carrier material. [0003] In addition, TiO 2 The material was also found to have good photoelectrochemical properties and can be used as a photocatalyst to exhibit good catalytic activity in multiple chemical reactions. But pure TiO 2 There are still two major shortcomings in photocatalysts, so that they have not been really applied in industrial photocatalytic production: (1) TiO 2 The intrinsic bandgap of is too large (3.2eV), so that it can only be excited by ultraviolet light and cannot respond ...

AI Technical Summary

Problems solved by technology

[0005] Currently, many experimental protocols have been proposed to prepare metal-doped M-TiO 2 However, the existing methods have the following disadvantages to varying degrees: (1) the experimental scheme involves dangerous strong acids (such as concentrated sulfuric acid, concentrated nitric acid, hydrofluoric acid, etc.) or expensive reagents

(2) The drastic preparation method (such as plasma bombardment, laser method, etc.) is used, which is not suitable for large-scale production, and the distribution of metal atoms doped is not uniform. For M-TiO 2 The overall performance of the catalyst is greatly affected

(3) Many prepared M-TiO 2 The key parameters such as the type, doping amount, and existing form of metal elements in the catalyst have little room for regulation, which greatly limits the modulation and application range of its catalytic performance.

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