Bismuth sulfide nanorod with CT (computed tomography) angiography function, nano-composite material and preparation thereof

Abstract

The invention discloses a bismuth sulfide nanorod with a CT (computed tomography) angiography function, a nano-composite material and preparation thereof. The preparation method of the bismuth sulfide nanorod comprises the following steps of: (1) dissolving bismuth chloride in a solvent in an ultrasonic manner to get a solution A; (2) dissolving sulfur powder or thiacetamide in the solvent in the ultrasonic manner to get a solution B; and (3) increasing the temperature of the solvent to 80-180 DEG C under the protection of argon, sequentially adding the solution A and the solution B, stirring to realize complete reaction, cooling, and then adding ethanol for centrifugation so as to get the bismuth sulfide nanorod, wherein the solvent is selected from oleyl amine, ethylene glycol and glycerin. The oleyl amine and a metal salt type compound are added into a toluene solution of the bismuth sulfide nanorod, stirring is performed at room temperature, and the ethanol is added for centrifugation so as to get the nano-composite material. The method disclosed by the invention is fast, simple and convenient, and the prepared bismuth sulfide nanorod and the nano-composite material thereof have the advantages of controllable appearance, uniform size and low cost and have excellent CT signals.

Description

technical field [0001] The invention relates to a synthesis of nanomaterials and its application in CT imaging, in particular to a bismuth sulfide nanorod, a nanocomposite material and a preparation method thereof. Background technique [0002] Bismuth sulfide (Bi 2 S 3 ) as A 2 V B 3 VI (A = Sb, Bi, As; B = S, Se, Te) is an important semiconductor material, which has potential application value in thermoelectric, electronic and optoelectronic devices, as well as electrochemical hydrogen storage and hydrogen sensors. Photosensitive materials, nonlinear optical materials, photocatalytic materials, bioimaging materials, coating materials, etc. have broad application prospects. In recent years, Bi 2 S 3 The research of nanomaterials mainly focuses on obtaining nanostructures with different shapes and sizes, including: nanowires, nanotubes, nanorods, nanofibers, nanosheets, nanospheres, nanoflowers, and quantum dots. These novel nanostructures They often have their own...

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Problems solved by technology

However, from the perspective of the preparation process, the reaction conditions are relatively harsh and the reaction time is relatively long; from the perspective of the preparation effect, there are some defects in the morphology and monodispersity

For example, the Weissleder, R research group (Nat. Mater. 2006, 5, 118–122) showed that bismuth sulfide has excellent performance as a CT contrast agent, but due to the uncontrollable morphology of the synthesized bismuth sulfide nanoparticles, the size is not uniform , which largely limits the application of bismuth sulfide as a contrast agent in CT

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