Double-light-path in-situ infrared spectrum pool based on total reflection

Abstract

The invention discloses a dual-optical-path in-situ infrared spectrum pool based on total reflection, belongs to the technical field of instruments and equipment, and can solve the problem that real in-situ detection cannot be realized due to the fact that a signal of a solution and a signal of a target molecule adsorbed by a solid sample cannot be distinguished in an existing total reflection infrared technology. The spectrum pool comprises a cylindrical pool body; two ends of the cylindrical tank body are opened, and a liquid inlet and a liquid outlet are formed in the side wall of the cylindrical tank body; the two infrared crystals are respectively arranged at the bottom end and the top end of the cylindrical cell body and seal a bottom end port and a top end port of the cylindrical cell body; the infrared light beams can be totally reflected in the infrared crystal; the solid sample is positioned on the inner side of the cylindrical cell body and is fixed on the infrared crystal close to the bottom end of the cylindrical cell body; and the reaction solution is used for flowing into the cylindrical tank body from the liquid inlet, and flows out from the liquid outlet after being subjected to in-situ reaction with the solid sample. The method is used for in-situ detection.

Description

technical field [0001] The invention relates to a double optical path in-situ infrared spectral cell based on total reflection, and belongs to the technical field of instruments and equipment. Background technique [0002] In catalytic chemical reactions, a considerable part of the reactions are liquid-solid reactions, such as heterogeneous catalytic hydrogenation, and the reactions occur on the liquid-solid surface; therefore, understanding the reaction behavior of the solid-liquid interface is important for understanding the mechanism of solid-liquid reactions. effect. However, in situ characterization of solid-liquid interfaces has been a difficult problem. Taking transmission infrared technology as an example, because the solvent (liquid part) usually has a relatively strong absorption for infrared light, it cannot be used as an infrared characterization technology for the solid-liquid interface. [0003] The total reflection infrared technology (ATR-IR) developed in r...

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Problems solved by technology

[0004] The present invention provides a dual optical path in-situ infrared spectrum cell based on total reflection, which can solve the problem that the existing total reflection infrared technology cannot achieve real in-situ detection due to the inability to distinguish the signal of the solution and the signal of the target molecule adsorbed by the solid sample The problem

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