Photocatalytic in-situ characterization system

Abstract

The invention relates to a photocatalytic in-situ characterization system used for researching a catalyst surface reaction process and an organic matter environment photochemical process. The photocatalytic in-situ characterization system comprises an ultrahigh-vacuum cavity, an in-situ mass spectrum module, an in-situ reflection infrared spectrum module, an energy spectrum module, a sample surface etching and cleaning part, a sample control platform, an online sample replacing part, a vacuum pump set, an in-situ lighting component and sample feeding part. By the photocatalytic in-situ characterization system, in-situ etching and cleaning can be performed on the surface of a solid-phase sample, and reaction details, such as reactant absorption modes, molecule feature group change, surface element variety qualitative tests and in-situ quantitative and qualitative detection of intermediates during catalytic reaction or programmed temperature rising, on the surface of the solid-phase catalyst and the gas-liquid and liquid-solid interfaces during the (photo) catalytic reaction can be systematically researched.

Description

technical field [0001] The invention belongs to the technical field of material characterization, in particular to a photocatalytic in-situ characterization system. Background technique [0002] To study and understand the mechanism of pollutant removal process and the interaction mechanism between pollutants and catalysts or particle surfaces / interfaces from the nanoscale and molecular levels, from the transient process and free radical level, is the fundamental solution to toxic and refractory pollutants. One of the prerequisites for control and mitigation. In-depth research on these basic scientific issues not only requires researchers to accurately grasp the frontier direction of the field, but also needs to rely on advanced experimental methods and analytical testing instruments, especially systematic ones that can achieve in-situ, transient or special test conditions Therefore, for typical scientific problems, it is of great significance to develop instruments and equ...

AI Technical Summary

Problems solved by technology

However, during the research process, we found that the independent use of a single test method cannot meet the needs of photocatalytic research. For example, when studying the photocatalytic decomposition process of pollutants on the surface of a certain catalyst, the ideal method requires simultaneous observation of pollutants under light conditions. Changes in the quality and quantity of intermediate products, changes in the surface structure of catalysts, the fate of elements such as H and O, etc., and these test items cannot be completed through multiple experiments and on different instruments, and the data obtained in batches cannot reflect the light. The real situation of the catalytic reaction process, which is also a prominent embodiment of the importance of in-situ reaction and testing

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