Method for chemical reaction in vacuum

Abstract

The invention relates to the field of chemistry, in particular to a method for chemical reaction in vacuum. A vacuum reaction and testing device comprises a reaction cavity, an observation window, a liquid container, a linear driver, a cooling rod, a sample, a sample seat, a sample stage, a metal rod, a gas inlet, a vacuum pump I, a corrugated pipe I, a gate valve, a corrugated pipe II, a testingcavity, a sample holder, a transmission rod, a vacuum pump II and a testing circuit. The cooling rod enables freezing and solidifying of gaseous reagent molecules fed into a vacuum environment. In thevacuum environment, the gaseous reagent molecules are pre-frozen, then a reagent is melted by heating to drip on the sample surface to realize chemical reaction, and accordingly sudden decline of theinternal vacuum degree of the reaction cavity is avoided. Transferring a solid sample out of the vacuum environment or feeding shielding gas into the vacuum cavity in vacuum reaction requiring a liquid-stage reagent is avoided, sudden decline of the vacuum degree around the sample is avoided, and impurities are avoided while chemical reaction operation steps are simple.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a chemical reaction method in vacuum used for chemical reaction of film samples in vacuum. Background technique [0002] Many chemical reactions, such as some gas-phase catalytic reactions, need to be carried out in a vacuum environment, that is, the chemical reactions of the reactants and subsequent characteristic tests are located in a vacuum chamber, and some special reaction processes need to be carried out in an ultra-high vacuum environment. The reagent is directly dropped on the surface of the solid sample. The first defect of the prior art: in the prior art, it is usually necessary to transfer the solid sample to the outside of the vacuum environment or pass a protective gas into the vacuum chamber. The operation process is cumbersome and impurities will be introduced. In addition, In some experiments, there is no permanent electrical connection between the sample and the sample ...

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Problems solved by technology

[0002] Many chemical reactions, such as some gas-phase catalytic reactions, need to be carried out in a vacuum environment, that is, the chemical reactions of the reactants and subsequent characteristic tests are located in a vacuum chamber, and some special reaction processes need to be carried out in an ultra-high vacuum environment. The reagent is directly dropped on the surface of the solid sample. The first defect of the prior art: in the prior art, it is usually necessary to transfer the solid sample to the outside of the vacuum environment or pass a protective gas into the vacuum chamber. The operation process is cumbersome and impurities will be introduced. In addition, In some experiments, there is no permanent electrical connection between the sample and the sample transfer rod and the vacuum cavity, and a simple fixing structure is required to implement the electrical test; defect 2 of the prior art: the connection mode of the sample seat in the prior art is relatively complicated , the chemical reaction method in a vacuum can solve the problem

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