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A new bismuth potassium nitrate oxide, Bi1.7K0.9O2(NO3)(2): Synthesis, structure, thermal behavior, and photocatalytic propertiesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Shenawi-Khalil S., Uvarov V., Charkin D.O., Goaz A., Popov I., Dolgikh V.A., Sasson Y.
- Журнал: Solid State Sciences
- Том: 14
- Номер: 1
- Год издания: 2012
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 159
- Последняя страница: 165
- DOI: 10.1016/j.solidstatesciences.2011.11.017
- Аннотация: We report here the first observation of a bismuth potassium nitrate Bi1.7K0.9O2(NO3)(2), obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a = 3.8698(7) angstrom. b = 3.8703(7) angstrom. and c = 24.1271(4) angstrom. Its crystal structure was refined from powder X-ray diffraction data by analogy with the mineral beyerite, Bi2O2-Ca(CO3)(2). The morphology and elemental composition of Bi1.7K0.9O2(NO3)(2) were characterized using scanning electron microscopy (SEM) with energy dispersive X-Ray spectroscopy (EDS). Its phase transformations upon heating and products of its thermal decomposition were studied using XRD. TGA and FTIR. At 440 degrees C, Bi1.7K0.9O2(NO3)(2) transforms to another basic bismuth potassium nitrate with demonstrates a very similar XRD pattern but slightly larger cell parameters. At 520 degrees C, the intermediate oxide nitrate decomposes into a mixture of crystalline alpha-Bi2O3 and KNO3. The as prepared Bi1.7K0.9O2(NO3)(2) showed lower than TiO2 (Degussa P25) photocatalytic activity upon decomposition of a widely used model pollutant, Rhodamine B (RhB) and photooxidation of potassium iodide under UV-vis light irradiation. Interaction with potassium iodide in alkaline media resulted in formation of Bi5O7I. (C) 2011 Elsevier Masson SAS. All rights reserved.
- Добавил в систему: Долгих Валерий Афанасьевич