Visible light responding photocatalyst LiFe3Sn2O9 and preparation method thereof

Abstract

The invention discloses a visible light responding photocatalyst LiFe3Sn2O9 and a preparation method thereof. The chemical formula of the photocatalyst is LiFe3Sn2O9. The invention further discloses a preparation method of the material. The photocatalyst disclosed by the invention has the advantages of being wide in spectral response range, high in light conversion efficiency, good in stability and the like, and has functions of harmful chemical substance decomposition, organic biomass decomposition and sterilization under the radiation of visible light, and in addition, is simple in preparation method, low in synthesis temperature, low in cost and applicable to industrial production and application.

Description

Technical field [0001] The invention relates to a photocatalyst LiFe responsive to visible light 3 Sn 2 O 9 The preparation method thereof belongs to the field of inorganic photocatalytic materials. Background technique [0002] With the development of social economy, people are paying more and more attention to energy and ecological environment. Solving energy shortage and environmental pollution is an urgent need to achieve sustainable development, improve people's quality of life, and ensure national security. [0003] From the late 1970s, people proposed the use of photocatalysts to decompose organics such as pesticides and malodorous substances in the water and the atmosphere, and self-cleaning of solid surfaces coated with photocatalysts. The principle of the photocatalytic reaction is that the photocatalyst generates holes and electrons after absorbing photons higher than its band gap energy. These holes and electrons undergo oxidation and reduction reactions respectively to...

AI Technical Summary

Problems solved by technology

For example, niobate photocatalyst Pb 3 Nb 4 o 13 、BiNbO 4 and Bi 2 MbO 7 (M=Al, Ga, In, Y, rare earth elements and Fe) etc. and niobium potassium composite oxide photocatalysts such as KNbO 3 , KNb 3 o 8 、K 4 Nb 6 o 17 and K 6 Nb 10.6 o 30 have good photocatalytic performance, but their intrinsic photocatalytic effect is weak or inactive in the visible light range.

[0005] Although photocatalysis research has been carried out for several years, most of the exploration and development of visible light-responsive photocatalysts are based on experience summaries obtained through a large number of experiments. Predict its photocatalytic performance in nature, so the types of photocatalysts with visible light response reported are still very limited, and there are problems such as low photoconversion efficiency, difficult synthesis, poor stability and narrow spectral response range, research and development of new preparations High-efficiency photocatalysts with simple methods and broad-band visible light response are difficult problems that scientists in the field have been eager to solve but have always been difficult to achieve, which largely limits the wide application and development of photocatalysts.