SrSnO3:N - Nitridation and evaluation of photocatalytic activity

JOURNAL OF ALLOYS AND COMPOUNDS

卷:649

Article

Lobo, Tatiane Martins^1,2  Lebullenger, Ronan²  Bouquet, Valerie²  Guilloux-Viry, Maryline²  Garcia Santos, Ieda Maria³  Weber, Ingrid Tavora^1,4 

[1] Univ Brasilia UnB, Inst Quim, Brasilia, DF, Brazil

[2] Univ Rennes 1, CNRS, UMR6226, ISCR, F-35042 Rennes, France

[3] Univ Fed Paraiba, Dept Quim, LACOM, Joao Pessoa, PB, Brazil

[4] Univ Fed Pernambuco, PGMTR, Recife, PE, Brazil

关键词: Strontium stannate;    Oxynitride;    Nitridation;    Visible range;    Photocatalysis;    Methylene blue;   

DOI  :  10.1016/j.jallcom.2015.05.203

来源: Elsevier

【 摘 要 】

The SrSnO3 was prepared in powders form by a conventional method of solid state reaction and submitted to thermal treatment under NH3 in order to obtain the oxynitride and then promote photocatalytic activity at the visible region. Three different nitridation conditions were tested. The results showed that when the SrSnO3 is subjected to nitridation at moderate conditions (600 degrees C and 650 degrees C) oxynitide is formed preserving the perovskite structure. On the other hand, when the nitridation occurs at more severe conditions (750 degrees C), it is possible to observe the decomposition of the structure instead of the incorporation of N. Samples in which oxynitride is formed, SrSnO3: N, showed high potential photocatalysis under visible light, showing to be about 4 times more active than SrSnO3 or TiO2 at the same conditions. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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