Azul de metileno imobilizado na celulose/TiO2 e SiO2/TiO2 : propriedades eletroquímica e planejamento fatorial

• Autor(a) principal: Scotti, Rodrigo
• Data de Publicação: 2006
• Outros Autores: Lima, Éder Cláudio, Benvenutti, Edilson Valmir, Piatnicki, Clarisse Maria Sartori, Dias, Silvio Luis Pereira, Gushikem, Yoshitaka, Kubota, Lauro Tatsuo
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/72850
• topic: Azul de metileno; Voltametria ciclica; Planejamento fatorial; Factorial design; Cyclic voltammetry; Methylene blue

The electrochemical properties of methylene blue immobilized on cellulose/TiO2 and mixed oxide SiO2/TiO2 matrices were investigated by means of cyclic voltammetry. The electron mediator property of the methylene blue was optimized using a factorial design, consisting of four factors in two levels. The experimental observations and data analyses on the system indicate that the lowest peak separation occurs for Sil/TiOAM, 1.0 mol L-1 KCl solution and 20 mV s-1 scan rate, while values of current ratio closest to unity were found for Cel/TiOAM independent of electrolyte concentration, 0.2 or 1.0 mol L-1, and scan rate, 20 mV s-1 or 60 mV s-1.