As an important semiconductor material, bismuth sulfide has a high potential application value

Overview of Bismuth sulfide

Bismuth sulfide is a compound of bismuth and sulfur. It exists in nature as the mineral magnesite. Bismuth sulfide (Bi2S3) belongs to group 15 (VA) of transition metal trihalides (TMTC). The orthorhombic bismuth sulfide (Bi2S3) is a non-toxic n-type semiconductor material that contains bismuth and sulfur that are harmless to the environment. The stoichiometric Bi2S3 has a hierarchical structure form of atomic bands, which is constrained by van der Waals forces. The structure of Bi2S3 facilitates the formation of one-dimensional nanostructures such as nanowires, rods, tubes and ribbons.

Ultra-long nanobelts with lengths up to millimeters can be obtained on a large scale by a solvothermal method using NaOH aqueous solution in glycerol. Ultrathin corrugated nanosheets can also be obtained by using a hydrazine salt-based liquid phase exfoliation process. However, sulfur vacancies will occur during the chemical exfoliation process, thereby changing the stoichiometry of the material to the chemical formula of Bi2S2.6. Bi2S3 is a direct band gap semiconductor with a band gap of 1.3 eV and an absorption coefficient of 105 cm-1.

Bismuth sulfide and antimonite Sb2S3 are isomorphic. The bismuth atoms are in two different environments, both of which have 7 coordinate bismuth atoms, 4 of which are in a near-planar rectangle, and the other three distances form irregular 7-coordination groups. It can react with acid to generate odorous hydrogen sulfide gas. The common gastrointestinal drug bismuth subsalicylate reacts with naturally occurring sulfides to produce bismuth sulfide in the body. When the sulfide is in the mouth, this can cause a temporary black tongue, and when the sulfide is in the colon, it can cause melena.

Applications of Bismuth sulfide

As an important semiconductor material, bismuth sulfide (Bi2S3) has potential application value in thermoelectric, electronic and optoelectronic devices and infrared spectroscopy. The bandgap energy of bismuth sulfide at room temperature is 1.33eV, which can be used to make photoelectric converters and is widely used in thermoelectric cooling processes. Nano-scale bismuth sulfide can not only blue shift the ultraviolet-visible absorption wavelength and fluorescence emission wavelength but also produce a Non-linear optical response that enhances the oxidation-reduction ability of nanoparticles and also has an excellent photoelectric catalytic performance. It has a wide range of application prospects in luminescent materials, non-linear optical materials, and photocatalytic materials.

1. Preparation of a bismuth sulfide composite photocatalyst for sewage treatment and preparation method. The prepared bismuth sulfide composite photocatalyst has strong light energy absorption capacity and high light absorption efficiency, and can effectively realize the effective separation of photogenerated electrons and holes, inhibit the occurrence of photo corrosion, has high catalytic activity, and can quickly and efficiently degrade wastewater.

2. Preparation of a bismuth sulfide/carbon nanotube composite material and its preparation method and its application as a lithium-ion battery cathode material. The carbon nanotubes serve as a bridge connecting the rod-shaped Bi2S3 and extend beyond the surface of the Bi2S3. The invention solves the problem of volume expansion of the bismuth sulfide material when Li+ is deintercalated and improves the cycle performance of the battery.

3. Preparation of a bismuth sulfide-zinc protoporphyrin composite material with tumor photodynamic therapy properties under near-infrared light excitation and its preparation method and application, which belong to the field of composite materials. Solve the problem that bismuth sulfide is used in photodynamic therapy to generate electron-hole complexes and the ability of heme oxygenase (HO-1) in cells to resist oxidative stress, resulting in low PDT efficiency. The composite material is a bismuth sulfide nanomaterial modified by synthesizing a poly-isopropyl acrylamide-acrylamide copolymer, and then a bismuth sulfide-zinc protoporphyrin composite material synthesized by the condensation reaction of a carboxyl group and an amino group. The prepared composite material enhances the efficiency of photodynamic therapy by inhibiting heme oxygenase activity and promoting electron-hole separation. At the same time, the above-mentioned materials have good biocompatibility, photostability, CT imaging capabilities and enhanced PDT Efficiency provides ideas for the design of a new integrated nano-diagnosis and treatment system, which is of great significance to the early diagnosis and treatment of cancer.

Bismuth sulfide Price

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 More information about Bismuth sulfide

Bismuth Sulfide Properties(Theoretical)

Bismuth Sulfide Health&Safety Information

 Chemical Identifiers