Chemical Analysis of CsPbBr2X (X = Cl, I) Nanocomposites by Total Reflection X-Ray Fluorescence Spectroscopy (TXRF)

Filatova, D.G.; Chizhov, A.S.; Rumyantseva, M.N.

Авторы: Filatova D.G., Chizhov A.S., Rumyantseva M.N.
Журнал: Inorganic Materials
Том: 59
Номер: 14
Год издания: 2023
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1414
Последняя страница: 1417
DOI: 10.1134/S0020168523140054
Аннотация: An approach to TXRF determination of the composition of perovskite nanocomposites of the putative compositions CsPbBr2Cl and CsPbBr2I is proposed. Sample preparation consists in the treatment of hydrophobic samples with dimethylformamide (DMFA) and the subsequent dilution of the obtained solutions with water. When using a copper solution as an internal standard, the reproducibility of the results of TXRF determination of the elements is attained with Sr no more than 0.05. The validity of the determination of Cs, Pb, Br, and I is confirmed by the results of their determination by ICP-MS in solutions after processing samples in DMFA followed by dilution with 2% HNO3 for Cs, Pb, and Br or tetramethylammonium hydroxide (TMAH) for Cs, Pb, Br, and I, whereas the determination of chlorides is confirmed by the method of direct potentiometry in diluted solutions. It is shown that lead does not form insoluble chlorides in the TMAH solution and does not interfere with the determination. The effect of bromides on the determination of chlorides is characterized by a potentiometric coefficient of 10–3. The results obtained provide the determination of the stoichiometry of the synthesized compounds CsPbBr2Cl and CsPbBr2.7I0.3.
Добавил в систему: Филатова Дарья Геннадьевна

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Chemical Analysis of CsPbBr2X (X = Cl, I) Nanocomposites by Total Reflection X-Ray Fluorescence Spectroscopy (TXRF)статья

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