SrSnO3:N – nitridation and evaluation of photocatalytic activity

Tatiane Martins Lobo (1, 2) , Ronan Lebullenger (1) , Valérie Bouquet (1) , Maryline Guilloux-Viry (1) , Ieda Maria Garcia Santos (3) , Ingrid Távora Weber (2, 4)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 IQ - Instituto de Química [Brasilia]
3 LACOM
4 UFPE - Universidade Federal de Pernambuco [Recife]

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 °C and 650 °C) oxynitide is formed preserving the perovskite structure. On the other hand, when the nitridation occurs at more severe conditions (750 °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

Mots clés: Methylene Blue; Nitridation; Oxynitride; photocatalysis; Strontium stannate; Visible range

Domaines: Chimie; Matériaux

Tatiane Martins Lobo, Ronan Lebullenger, Valérie Bouquet, Maryline Guilloux-Viry, Ieda Maria Garcia Santos, et al.. SrSnO3:N – nitridation and evaluation of photocatalytic activity. Journal of Alloys and Compounds, 2015, 649, pp.491-494. ⟨10.1016/j.jallcom.2015.05.203⟩. ⟨hal-01169299⟩