Author/Authors :
Sifontes، نويسنده , , ءngela B. and Gonzلlez، نويسنده , , Gema and Tovar، نويسنده , , Leidy M. and Méndez، نويسنده , , Franklin J. and Gomes، نويسنده , , Maria E. and Caٌizales، نويسنده , , Edgar and Niٌo-Vega، نويسنده , , Gustavo and Villalobos، نويسنده , , Hector and Brito، نويسنده , , Joaquin L. Gonzalez III، نويسنده ,
Abstract :
In this study aluminophosphates have been synthesized from aluminum isopropoxide and phosphoric acid solutions using yeast cells as template. The physicochemical characterization was carried out by thermogravimetric analysis; X-ray diffraction; Fourier transform infrared; N2 adsorption–desorption isotherms; scanning electron microscopy; transmission electron microscopy and potentiometric titration with N-butylamine for determination of: thermal stability; crystalline structure; textural properties; morphology and surface acidity, respectively. The calcined powders consisted of an intimate mixture of amorphous and crystallized AlPO particles with sizes between 23 and 30 nm. The average pore size observed is 13–16 nm and the specific surface area after calcinations (at 650 °C) ranged between 176 and 214 m2 g−1.
Keywords :
B. Chemical synthesis , C. Electron microscopy , A. Inorganic compounds , D. Surface properties
