Bismuth oxyiodide
Names
Other names
Bismuth oxide iodide
Bismuth iodide oxide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.029.206
  • I[Bi]=O
Properties
BiIO
Molar mass 351.88 g·mol−1
Appearance brick red solid[1]
Density 8.0 g·cm−3[1]
Boiling point 300 °C (573 K) (decomposes)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references


Bismuth oxyiodide is an inorganic compound, an oxyiodide of bismuth, with the chemical formula BiOI.

Preparation

Bismuth oxyiodide can be obtained by reacting bismuth(III) oxide with hydroiodic acid:[1]

It can also be obtained by reacting bismuth nitrate pentahydrate and potassium iodide in ethylene glycol at 160 °C in a reactor.[3] The aqueous solution of bismuth nitrate acidified with nitric acid is adjusted by sodium hydroxide and then added dropwise with potassium iodide to obtain the reaction product, and other proportions of oxyiodides will also be produced according to different adjustments.[4]

Properties

Bismuth oxyiodide forms a brick red crystalline powder or copper-colored crystals. It is insoluble in water and ethanol, is only slightly attacked by water even when heated, and melts with decomposition when red hot.[1] It has a tetragonal crystal structure (isotypical with bismuth oxychloride) with space group P4/nmm (No. 129).[5]

References

  1. 1 2 3 4 Handbuch der präparativen anorganischen Chemie. 1 (3., umgearb. Aufl ed.). Stuttgart: Enke. 1975. ISBN 978-3-432-02328-1.
  2. ↑ Haynes, William M. (2012-06-22). CRC Handbook of Chemistry and Physics, 93rd Edition. CRC Press. ISBN 978-1-4398-8049-4.
  3. ↑ 付大卫, 谢汝义, 张琳萍,等. 空心球状碘氧化铋的制备及其对染料的吸附降解性能 Archived 2019-08-20 at the Wayback Machine[J]. 应用化学, 2017, 34(5):590-596.
  4. ↑ Wenlian William Lee, Chung-Shin Lu, Chung-Wei Chuang, Yen-Ju Chen, Jing-Ya Fu, Ciao-Wei Siao, Chiing-Chang Chen (2015). "Synthesis of bismuth oxyiodides and their composites: characterization, photocatalytic activity, and degradation mechanisms". RSC Advances. 5 (30): 23450–23463. doi:10.1039/c4ra15072d. ISSN 2046-2069. Retrieved 2018-08-20.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ↑ Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN 978-3-540-60035-0.
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