Description
Tin(IV) Sulfide (SnS₂) – Product Specification
1. Basic Information
| Item | Details |
|---|---|
| Product Code | T896513 |
| Product Name | Tin(IV) Sulfide (Stannic Sulfide) |
| CAS Number | 1315-01-1 |
| Molecular Formula | SnS₂ |
| Molecular Weight | 182.8 g/mol |
| Density | 4.51 g/cm³ |
| Melting Point | 1230°C |
2. Test Items & Technical Requirements
| Test Item | Specification Requirements |
|---|---|
| Appearance | Yellow to tan powder or hexagonal flakes |
| Purity | ≥99.5% |
| ICP Impurities (Total Metal Impurities) | ≤0.5% (based on ≥99.5% purity) |
| X-Ray Diffraction (XRD) | Conforms to the hexagonal crystal structure requirements of SnS₂ |
3. Product Overview
Tin(IV) Sulfide (SnS₂), commonly known as “golden powder”, is an inorganic covalent compound with a typical layered structure. It exists as yellow hexagonal flake crystals with a CdI₂-type (cadmium iodide-type) layered configuration. Within the layers, Sn and S atoms are bonded via covalent bonds, while weak van der Waals forces connect adjacent layers. This unique structure endows SnS₂ with distinctive physicochemical properties and great potential for scientific research and applications.
4. Core Physicochemical Properties
- Crystal Structure: CdI₂-type layered crystal structure (space group P-3m1). The layered stacking characteristic facilitates 2D material exfoliation and interface function regulation.
- Solubility: Insoluble in water and most organic solvents; soluble in aqua regia (3:1 volume mixture of concentrated hydrochloric acid and concentrated nitric acid) and hot concentrated alkali solutions, where dissolution is achieved through coordination or alkaline hydrolysis reactions. Insoluble in dilute acids, dilute alkalis, and common non-polar solvents.
- Appearance: Standard products are uniform yellow to tan hexagonal flake crystals or powder, free of visible impurities with good color consistency.
5. Scientific Research & Application Fields
(1) Photovoltaic Materials Research (Core Research Direction)
With an appropriate bandgap width (~2.2-2.4 eV), high visible light absorption coefficient (>10⁴ cm⁻¹ in the visible light range), and environmental friendliness, SnS₂ has emerged as a key research material for absorber layers in novel thin-film solar cells. Its layered structure and photoelectric conversion properties meet the R&D needs of single-junction/tandem solar cells (e.g., perovskite-SnS₂ tandem cells, all-inorganic Sn-based solar cells). It demonstrates significant potential in improving photoelectric conversion efficiency, reducing costs, and enhancing environmental compatibility, making it one of the research hotspots in the global photovoltaic materials field.
(2) Functional Materials & Industrial Applications
- Gold-Imitating Coatings & Decorative Materials: Leveraging its golden yellow appearance and chemical stability, it is suitable for scenarios such as gold-imitating film preparation and decorative coating synthesis, adapting to research on material surface functional modification.
- High-Performance Pigments: As a core raw material for yellow inorganic pigments, it exhibits light resistance, heat resistance, and acid-alkali corrosion resistance. It can be used in functional pigment synthesis and coloring research of coatings, ceramics, and other materials.
6. Scientific Research Application Tips
The layered structure and physicochemical properties of this product make it widely applicable in scientific research scenarios such as 2D material exfoliation, photovoltaic device fabrication, and functional coating modification. It is recommended that researchers optimize material pretreatment processes (e.g., vacuum drying, surface modification, dispersion system selection) according to specific experimental requirements (e.g., thin-film preparation, composite material synthesis, photoelectric performance testing) before use to ensure the accuracy and reproducibility of experimental data.
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