Structure and preparation method of bismuth sulfide Bi2S3

Overview of bismuth sulfide Bi2S3

Bismuth sulfide, chemical formula Bi2S3. Molecular weight 514.15. Brown-yellow powder or crystals. Specific gravity 7.39. Decomposes at 685℃. It is insoluble in water and ethyl acetate, soluble in nitric acid and hydrochloric acid. It is made of metallic bismuth and sulfur or it is made by transferring hydrogen sulfide to a bismuth salt solution. For the preparation of bismuth compounds. Bismuth sulfide is an important semiconductor material, and its application in optoelectronic components and thermoelectric devices has brought great convenience to mankind. Nano bismuth sulfide makes its various properties more optimized. Since the properties of nanomaterials depend to a large extent on the morphology of nanomaterials, it is of great significance to synthesize more bismuth sulfide nanostructures with special morphologies.

Bi2S3 structure of bismuth sulfide

Bismuth sulfide Bi2S3 has a special layered structure and weak bonds between the layered units, which leads to the anisotropy of Bi2S3 growth in solvothermal and hydrothermal synthesis and the growth of crystal nuclei into tiny flake crystals. Under relatively low temperature conditions, the crystal growth rate of the reactant is faster than the nucleation rate, which is conducive to the growth of Bi2S3 into nanosheets in a solvent with high viscosity and high surface tension. The powder synthesized in the solvent distilled water and distilled water-ethylene glycol (2:1) with high viscosity and high surface tension is conducive to the formation of nano flake structure. The surface tension energy and viscosity between Bi2S3 and solvent DMF are relatively low, which is conducive to strengthening the chemical force between the S-Bi bond in the chain. According to the PBC theory of crystal growth, the growth of Bi2S3 crystal is along the most force. There is the fastest growth rate in the direction of the strong bond chain, which ultimately leads to the formation of Bi2S3 nanorods. In summary, it can be inferred that the surface tension energy between Bi2S3 and solvent distilled water, distilled water-ethylene glycol is higher than that between Bi2S3 and solvent DMF. Solvents with high surface tension and high viscosity are conducive to the formation of nano flakes, while solvents with low viscosity and low surface tension are conducive to the formation of rod-like structures.

Preparation method of bismuth sulfide Bi2S3

Weigh 0.97gBi(NO3)3·5H2O(0.002mol) and dissolve it with 15mL DMF, as solution A. Add 15mL DMF to 0.72gL-cystine (0.003mol), and adjust its pH value to 10-11 with 2mol/L(M)NaOH, as solution B. Add Solution B to Solution A under constant stirring, stir for 10 minutes, put it into a 50mL polytetrafluoroethylene lined autoclave, seal it, keep it at 160°C for 5 days, and cool it naturally to room temperature. The resulting black product was washed several times with absolute ethanol and distilled water, and finally dried in a vacuum drying cabinet at 60° C. for 5 hours. Under the same conditions, the sample was synthesized with a mixed solvent of distilled water, distilled water and ethylene glycol (2:1) instead of DMF solvent. The obtained black powder was determined with a Bruker D8 X-ray diffractometer for its crystal structure (copper target, λ=0.15406 nm). JSM-6700F field emission scanning electron microscope (accelerating voltage of 8kV) and TecnaiG2F20 transmission electron microscope (accelerating voltage of 200kV) were used to characterize the morphology of the obtained samples. Using Bi(NO3)3·5H2O and L-cystine as raw materials, solvothermal reaction in DMF (conditions are 160℃, 5d), the nanorod structure of Bi2S3 can be prepared; L-cystine can be used as sulfur In DMF solvent, adding an appropriate amount of 2mol/L NaOH can prepare Bi2S3 nanorod structures with better morphology.

Uses of bismuth sulfide Bi2S3

Bismuth sulfide Bi2S3 has the advantages of environment, photoconductivity and nonlinear optical response. It is widely used in solar cells, photodiode arrays and infrared spectroscopy. It can also be used in the manufacture of other bismuth compounds, free-cutting steel additives and the microelectronics industry. Bismuth sulfide Bi2S3 powder can be used to prepare bismuth sulfide nanosheets, nanosheets and ultra-thin films.

Bismuth sulfide Bi2S3 powder is suitable for liquid chemical stripping to prepare Bi2S3 nanosheets and nanoparticles, and can form up to multi-layer films.

Bismuth sulfide (Bi2S3) has a good band gap of 1.3 eV (close to infrared light) and a large absorption coefficient. It can be used in solution processing thermoelectric devices, photodetectors, photosensitizers, solar cells and super capacitors. Bi2S3 is also an interesting candidate material for polymer nanoparticle solar cells.

Bismuth sulfide Bi2S3 price

The price of bismuth sulfide Bi2S3 products will vary with random factors such as production costs, transportation costs, international situations, exchange rates, market supply and demand for bismuth sulfide Bi2S3 products. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for bismuth sulfide Bi2S3 products, please feel free to send an inquiry to get the latest bismuth sulfide Bi2S3 product prices.

Suppliers of Bismuth Sulfide Bi2S3

As a global supplier of bismuth sulfide Bi2S3, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (zinc sulfide, two-fluid zinc, bismuth sulfide, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.