Method for preparing monodispersion bismuth sulfide nano granule by template method

Abstract

The invention relates to a method for preparing bismuth sulphide nanometer grains, in particular to a method for preparing mono-dispersion bismuth sulphide nanometer grains through a template method, which is characterized in that: the method for preparing bismuth sulphide nanometer grains comprises the following steps of: 1) preparing precursor solution containing bismuth: dissolving the compound containing bismuth into a dispersion medium to form the bismuth compound solution, and then putting the solution into dispersion stabilizer, and stirring for 0.5 to 3 hours, to acquire the bismuth precursor solution; 2) according to a molar ratio of sulfide ions in the sulfur compound solution to the bismuth ions in the bismuth precursor solution between 3: 2 and 1: 2, selecting the sulfur compound solution as well as the bismuth precursor solution; adjusting the pH value of the bismuth precursor solution between 1.0 and 5.0 by a pH regulator, and adding the sulfur compound solution while stirring at a high speed at the normal temperature; controlling the reaction time between 1 and 48 hours; and carrying out centrifugal separation for the acquired suspension liquid and getting rid of the supernatant, to prepare the mono-dispersion bismuth sulphide nanometer grains. The method for preparing mono-dispersion bismuth sulphide nanometer grains has the advantages of low cost, no pollution to the environment, high yield, narrow distribution of nanometer grain diameters and simple and convenient operation.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a preparation method of bismuth sulfide nanoparticles. Background technique [0002] Due to its special structure, shape, and particle size distribution, monodisperse nanoparticles have extremely broad application prospects in medicine, luminescent materials, thermoelectric materials, and solar energy conversion materials. For nanoparticles, the size and distribution of nanoparticles are very important. They directly affect their surface effects, quantum effects, small size effects and macroscopic quantum tunneling effects, etc., which lead to their applications in optics, magnetism, electricity, Thermal and mechanical properties. It can be seen that the particle size scale of nanoparticles is crucial to the performance of materials, and the size of bismuth sulfide nanoparticles and the preparation of monodisperse nanoparticles with a particle size deviation ≤ 5% are particula...

AI Technical Summary

Problems solved by technology

In terms of its preparation effect, the particle size of nanoparticles prepared by metal-organic chemistry can reach below 100 nanometers, but because it mainly uses organic phosphorus with a high boiling point as a surfactant, its price is high and its toxicity is high, and it has strict requirements on operation. , inconvenient to use, not conducive to mass production

In addition, the raw materials used in the sol-gel method are highly toxic, flammable, expensive, and the preparation conditions are very harsh, the operation is difficult, the output is small, and the preparation cost is very high.