A kind of immobilized f, n, ag co-doped titanium dioxide photocatalyst and its preparation method and application

Abstract

The invention belongs to the field of photocatalytic materials, and discloses an immobilized F, N and Ag co-doped titanium dioxide photocatalyst and a preparation method and application thereof. The preparation method of the photocatalyst comprises the following steps: (1) soaking the photocatalyst carrier in an acidic solution, then taking out, washing, drying and calcining for use; (2) mixing the titanium dioxide precursor and anhydrous ethanol uniformly, Add hydrolysis inhibitor dropwise under stirring, then add ammonium fluoride solution and silver nitrate solution to obtain a mixed solution; (3) immerse the photocatalyst carrier obtained in step (1) after calcining at high temperature in step (2) After the reaction is completed, the photocatalyst carrier in the hydrothermal reactor is taken out, washed and dried to obtain the immobilized photocatalyst. Compared with pure titanium dioxide, the obtained catalyst has obviously enhanced photocatalytic performance, the catalyst is firmly supported and not easy to fall off; and the preparation process of the invention is simple and the repeatability is good.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to an immobilized F, N, Ag co-doped titanium dioxide photocatalyst, its preparation method and application. Background technique [0002] With the development of modern society, environmental issues have become the focus of people's attention. TiO 2 Because of its non-toxic and harmless, cheap and easy to obtain, stable chemical properties, high catalytic activity, and strong oxidation ability, it has become a hot spot in the research of heterogeneous photocatalysis, and has broad application prospects in environmental pollution control. But TiO 2 There are also defects such as easy loss, easy agglomeration, difficulty in separation, recovery and recycling, and narrow optical response range, which seriously restrict the practical application of its photocatalytic technology. [0003] In response to the above problems, one is to modify and dope titanium dioxide to improve i...

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Problems solved by technology

But TiO 2 There are also defects such as easy loss, easy agglomeration, difficulty in separation, recovery and recycling, and narrow optical response range, which seriously restricts the practical application of its photocatalytic technology.

[0003] In response to the above problems, one is to modify and dope titanium dioxide to improve its spectral response range. There have been a large number of research reports on the single doping of metal elements or non-metal elements, but the co-doping of metal elements and non-metal elements The second is to find an effective method to immobilize titanium dioxide. At present, the immobilization methods of titanium dioxide at home and abroad are mainly concentrated in dip coating method, sol-gel method, electrochemical deposition method and chemical vapor deposition method. method, etc., but there are few reports on the immobilization of titanium dioxide by hydrothermal method.

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