Interaction of Sodium Titanate Nanotubes with Organic Acids and Base: Chemical, Structural and Morphological Stabilities

نویسندگان

  • Carolina M. Rodrigues
  • Odair P. Ferreira
  • Oswaldo L. Alves
چکیده

Este trabalho relata a interação de nanotubos de titanato de sódio (Na-TiNT) com soluções aquosas de ácido benzóico, ácido fenilfosfônico e anilina. Os Na-TiNT foram obtidos através do tratamento hidrotérmico de TiO 2 em solução aquosa de NaOH. Os resultados obtidos através de FTIR, XRD, TEM e análise elementar mostraram que a estabilidade química, estrutural e morfológica dos nanotubos está relacionada à natureza química do meio (básico ou ácido) e às condições de tratamento (temperatura e tempo de contato). A fase α-fenilfosfonato de titânio(IV) foi formada a partir da interação dos Na-TiNT com ácido fenilfosfônico; a quantidade da nova fase foi dependente do tempo de contato e sua cristalinidade da temperatura. Porém, TiO 2 ou nanotubo de titanato contendo H foram obtidos, em função das condições de tratamento, a partir da interação dos Na-TiNT com ácido benzóico. Quando os Na-TiNT interagiram com a anilina nenhuma mudança estrutural, morfológica ou composicional foi observada.

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تاریخ انتشار 2010