a ta 3 no 5 /cds heterojunction fiber photocatalyst and preparation method thereof

Abstract

The invention belongs to the field of preparation of catalysts containing metals, in particular to a Ta 3 N 5 / CdS heterojunction fiber photocatalyst and its preparation method. The method adopts electrospinning method combined with hydrothermal reaction to prepare Ta 3 N 5 / CdS heterojunction fiber photocatalysts, including Ta 3 N 5 Spinning solution preparation steps, Ta 2 o 5 Fiber preparation steps, Ta 3 N 5 Nanofiber preparation steps, hydrothermal reaction system preparation steps, hydrothermal reaction and subsequent treatment steps. The preparation method of the present invention makes CdS nanoparticles uniformly wrap Ta 3 N 5 Nanofibers, the two are evenly and fully compounded, which is conducive to improving photocatalytic activity, stable properties, and easy recycling; the preparation method is simple, the equipment and other costs are relatively cheap, and the experimental conditions are controllable, which is conducive to large-scale production and preparation.

Description

technical field [0001] The invention belongs to the field of preparation of catalysts containing metals, in particular to a Ta 3 N 5 / CdS heterojunction fiber photocatalyst and its preparation method. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of environment and energy. At present, the core of promoting the development of photocatalytic technology is to research and develop highly efficient, stable and easily recyclable visible light photocatalysts. However, at present, the development of photocatalytic technology mainly faces the following problems. First, the most studied and recognized efficient photocatalyst is TiO 2 , but can only be driven by ultraviolet light, and the utilization rate of solar energy is low; second, the rapid recombination of photogenerated electrons and hole pairs seriously inhibits the photocatalytic activity of semiconductors; Secondary pollution. Therefore, ...

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Problems solved by technology

This method also has the following defects: First, BiTaO 4 It is also a single-component visible light photocatalyst that can utilize visible light with a maximum wavelength of 420nm. Due to its narrow band gap, photogenerated electrons and holes recombine seriously, resulting in unsatisfactory photocatalytic activity.

Ta 3 N 5 It can absorb and utilize visible light with a wavelength of up to 600nm, and can make greater use of sunlight, but its pure Ta 3 N 5 Fibers face serious problems of recombination of photogenerated electrons and holes, therefore, the construction of Ta 3 N 5 It has become an inevitable trend to use heterojunction fibers to promote the separation of photogenerated electrons and holes, and to improve its catalytic activity.

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