Preparation method of multistage sample injection micro-fluidic chip for synthesizing Ag/Ag2S/CdS heterojunction

Abstract

The invention discloses a preparation method of a multistage sample injection micro-fluidic chip for synthesizing a Ag/Ag2S/CdS heterojunction. The multistage sample injection micro-fluidic chip for synthesizing the Ag/Ag2S/CdS heterojunction is disclosed to overcome the defects of existing synthesis technologies of a nanomaterial. A CdS micro-droplet forming area, a CdS nano-particle mixing reaction area, a Ag2S/CdS micro-droplet forming area, a Ag2S/CdS heterojunction mixing reaction area and a Ag/Ag2S/CdS forming area are arranged to realize the effective control effect of the micro-fluidicchip on the synthesis of the nanocomposite material. The multistage sample injection micro-fluidic chip designed by the invention has the advantages of optimized structure, convenience in operation,realization of step-by-step sample injection, and realization of synthesis of the nanocomposite material with a good dispersity and a uniform size. In addition, introduction of samples with differentconcentrations and different proportions can be realized by multistage sample injection, so that successful preparation of the nanocomposite material with different sizes and performances can be achieved.

Description

technical field [0001] The invention relates to a preparation method of a multi-stage sampling microfluidic chip, in particular to a synthetic Ag / Ag 2 The preparation method of the multi-stage sampling microfluidic chip of S / CdS heterojunction realizes the different concentrations of multi-stage sampling for Ag / Ag 2 Research on S / CdS heterojunction materials. Background technique [0002] Due to their unique optical, electrical, thermal, chemical and mechanical properties, nanomaterials are widely used in many fields of analytical chemistry such as electrochemical analysis, spectral analysis, imaging analysis, life analysis, and drug analysis. The vigorous development of nanomaterials provides a good opportunity and space for the development of analytical chemistry, but it also faces great challenges, especially the preparation of high-performance, monodisperse, high-stability nanomaterials is still very difficult, which cannot meet the requirements of modern analysis. app...

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Problems solved by technology

The vigorous development of nanomaterials provides a good opportunity and space for the development of analytical chemistry, but it also faces great challenges, especially the preparation of high-performance, monodisperse, high-stability nanomaterials is still very difficult, which cannot meet the requirements of modern analysis. application requirements

[0003] With the development of nanotechnology, the preparation methods of nanomaterials are divided into physical methods and chemical methods. Among them, physical methods require expensive instruments and equipment, and the yield of prepared nanomaterials is low, easy to oxidize, and agglomerate seriously; chemical methods mostly require higher The reaction temperature limits the use of many solvents and reagents, and it is difficult to precisely control the reaction conditions during the synthesis process. There are still huge challenges in the preparation of complex nanomaterials such as core-shell structures and heterojunction structures.

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