Preparation method of bismuth quantum dot material growing in mesoporous silica nanoparticles

Abstract

The invention discloses a preparation method of a bismuth quantum dot material growing in mesoporous silica nanoparticles, and belongs to the field of nano material preparation research. According tothe method, mesoporous silica is prepared by using an organic template, and bismuth quantum dots are reduced and grown in situ, so that the particle size of the prepared mesoporous silica is about 150nm, the pore diameter is about 10 nm, and the particle size of the bismuth quantum dots is about 1-2 nm. Mesoporous silica prepared has excellent adsorption performance, has a good protection effecton bismuth, improves the photo-thermal conversion efficiency of bismuth, and has a wide application prospect in the fields of electronic devices, sensors, drug carriers and the like. The bismuth quantum dots (Bi@SiO2) grown in the mesoporous silica nanoparticles have excellent photothermal conversion performance and huge potential in the field of tumor photothermal therapy. The preparation methodprovided by the invention is simple in equipment and has the advantages of easiness in control of process conditions, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanoparticle materials, in particular to a bismuth quantum dot (Bi@SiO2) grown in mesoporous silicon oxide nanoparticles 2 ) The preparation method of the material. Background technique [0002] Porous materials have the advantages of large specific surface area, large pore volume, and low density, and are widely used in the fields of adsorption and separation, catalysis, electrochemistry, biomedicine, optics, and electronic devices. Compared with other porous materials, mesoporous silica has more excellent properties, such as adjustable morphology and size, highly ordered pore structure, uniform distribution of pore size, high porosity and large specific surface area. , surface modification is easy, non-toxic, stable, cheap, etc., making mesoporous silica have good application prospects in the fields of catalysis, sensors, and drug carriers. [0003] When silica is used as a drug carrier, its...

AI Technical Summary

Problems solved by technology

[0004] The organic template method is widely used to prepare mesoporous silica, but it has several disadvantages: (1) The preparation process is complicated (2) It is impossible to prepare nanoparticles with a controllable size smaller than 200nm (3) The pore size is mostly smaller than 5nm

However, bismuth is easily oxidized, and the current preparation method cannot achieve effective protection.

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