Evaluation method for nano powder material light catalysis property

Abstract

A photocatalysis performance estimating method for nano powder material, belonging to the estimating technical field of material chemical properties, includes seven steps in operation as setting up aphotocatalysis device, preparing a photocatalysis degradation solution, degradation reaction of photocatalysis, centrifugal ization, taking the solution, determining the unabsorbance Ar, and estimating the grade of photocatlaysis performance of the nano powder material. Through making the estimated standard of photocatalysis, the quality grade for photocatalyst of the nano powder material can be determined and it provides the direct basis for the use of nanopowder material. The method only uses very simple instrument, but also is quick in detection so that it has a very good prospect for the application to environmental protection and food freshness-keeping field of nano powder material.

Description

Technical field [0001] The invention relates to a method for evaluating the photocatalytic performance of a nano-powder material, which belongs to the technical field of material chemical property evaluation. Background technique [0002] Nanotechnology is a high-tech that was born in the late 1980s and is developing vigorously. As one of its products, nanopowder materials embody modern technologies such as small size, complex structure, high integration, strong interaction and high specific surface area. specialty. At the nanometer size, the material has many specific properties that conventional materials do not have, such as: quantum effect, surface effect, volume effect, etc., and its optical, thermal, electrical, magnetic, mechanical and especially some chemical properties have also occurred. These changes have contributed to the research and application of nano-powder materials in many fields. In order to identify and inspect nanopowder materials ...

AI Technical Summary

Problems solved by technology

In order to identify and inspect nanopowder materials and observe their surface properties, a series of nanopowder material characterization methods have been developed, but the instruments used in these methods are very expensive, such as scanning tunneling microscope, atomic force microscope, laser detection atomic force microscope, cryogenic scanning Microscopes, vacuum scanning tunneling microscopes, ballistic electron emission microscopes, etc., the price of a stand-alone machine is hundreds of thousands or even millions of yuan, which greatly limits the application of these methods

In addition, these methods can only provide limited structural information such as material size, surface morphology, and crystal form, while properties such as chemical properties that are closely related to the practical application of nanopowder materials cannot be determined.

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