Apparatus and method for preparing nanomaterials by supercritical-solvothermal combination

Abstract

The invention discloses a supercritical-solvent heat combined device and a method for preparing a nanometer material. The device comprises a carbon dioxide steel bottle, a carbon dioxide cooler, a carbon dioxide pump, an entrainer accommodator, an entrainer pump, a first valve, a second valve, a third valve, a secondary reactor, a fourth valve, a main reactor, a fifth valve and a separator. The device can realize a plurality of supercritical-solvent heat combined preparation methods, and can satisfy the preparation of the nanometer material and the demands of controlling such crystal growth behaviors as crystal transfer, grain size and morphology evolution of an inorganic nanometer material through splicing pipelines and modules and adjusting such conditions or parameters as valve switch combinations, raw material placing mode and entrainer entering mode. The device has such advantages as simplicity and convenience for operation, wide adjusting range of experimental parameters, strong stability and high productivity, has huge application potential in the research, preparation and application fields of the nanometer material, and has wider industrialization foreground.

Description

technical field [0001] The general idea and design of the present invention relate to a supercritical device and technology, and more specifically, relate to a device and method for preparing nanomaterials by combining supercritical and solvothermal. Background technique [0002] In recent decades, nanomaterials have attracted extensive attention from researchers from various countries. This is because it has been found that when the size of the material reaches the nanometer level, it will have surface interface effects, small size effects, and quantum dimensions that traditional materials do not have. effect, macroscopic quantum tunneling effect and other nano-effects. These nanomaterials exhibit strange or abnormal photoelectric, physical, chemical and even biological properties that are different from atoms or molecules, and different from macroscopic materials, so they have extremely high potential application value. [0003] In the field of nanomaterial preparation te...

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Problems solved by technology

[0004] However, the solvothermal method is a preparation reaction in an ordinary liquid phase environment, which is limited by conditions such as reaction pressure and solvent solubility. Although the process is relatively mature, various organic solvents are used in some preparation processes, and the post-treatment process is relatively complex. cumbersome, reaction aids (such as surfactants, etc.) are difficult to remove, and it is difficult to obtain pure products, so researchers are still working hard to find more favorable preparation methods

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