Utilization of Sn/Nb2O5 composite for the removal of methylene blue

• Main Authors: Fabiane de Oliveira Cantão, Walclée de Carvalho Melo, Luiz Carlos Alves Oliveira, Aline Ribeiro Passos, Adilson Cândido da Silva
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2010-01-01
• Series: Química Nova
• Subjects: niobium oxide; tin; organic dye
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000300007

In this work, the oxidation of methylene blue textile dye in the presence of hydrogen peroxide, using niobium oxide impregnated with different proportions of tin (1, 5 and 10% in mass) as catalyst was studied. The materials were characterized by TPR, XPS, XRD and FTIR. The oxidation tests monitored by ESI-MS showed that the composite containing the higher amount of tin was the most efficient in the removal of the dye. The XRD, XPS, and TPR data presented evidence of the formation of the tin-niobium oxide composite containing Sn0 and supported SnO2.