Filmes de tetratungstato de sódio/óxido de tungstênio preparados com cloreto de dodeciltrimetilamônio como agente estruturante

• Autor(a) principal: Soares de Moura, Diego
• Data de Publicação: 2022
• Outros Autores: Santos Garcia, Irene Teresinha
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Eletrônica Científica da Uergs
• Texto Completo: https://revista.uergs.edu.br/index.php/revuergs/article/view/3422
• topic: Colloidal synthesis; sol-gel; photocatalysis

The multiple forms of structuring transition metal anions in solution are important aspects to be taken into account in obtaining oxides of these metals by the sol-gel method. The formation of polyanions in aqueous media can produce a variety of structures in the solid state. Films were obtained through sol-gel method with sodium tungstate as precursor and dodecyltrimethylammonium chloride (DTAC) as structuring agent, after calcined at 700 °C in air. The films, structured as nanospheres, were composed mainly of triclinic sodium tetratungstate and monoclinic tungsten oxide. The cationic surfactant interacts in aqueous media with the precursor, affecting the obtained films' final morphology, without affecting their crystal structure. Their photocatalytic properties were also evaluated.