Study the effect of the guiding agent (CTAP) Cetyl tri methyl ammonium bromide on the structural properties of the mixed oxide prepared by hydrothermal treatment at temperatures (70, 100 and 130)

Abstract

    Three samples of Al₂O₃/CdO  the mixed oxide were studied at a single molar ratio of Al/Cd (1-0.25) and the effect of adding the guiding agent Cetyl trim ethyl ammonium bromide (CTAP) with a molar ratio of 0.5 mol were studied by hydrothermal method by placing the samples in an autoclave consisting of a Teflon container inside a sealed chrome container and then placing them in an oven at temperatures (70, 100 and 130 ^oC) for 7 hours, and the symbol was given , where X is the heat treatment temperature and C_0.5 is      the molar ratio of the guiding agent 0.5 mol, the surface area value increased by adding the guiding agent to 288m2/g of the sample .

      The increase in the surface area value is consistent with the changes in the total pore volume Vp, micro pore volume Vo, monolayer capacitance Vm, average pore volume Vmeso and C_BET constant values ​​indicating weak affinity between the adsorbent and the adsorbate while low adsorption energy E_o values ​​indicate that the adsorption is of the physical type.

    The FTIR curves show a peak in the range 450-480 cm^-1, and another broad shoulder-shaped peak in the range 870-600 cm^-1, where the first peak expresses the tetrahedral vibrations while the second peak is attributed to the presence of symmetrical vibrations. The presence of these peaks indicates the contribution of the angles formed between the rings and the presence of oxygen bridges connecting and which characterizes the regular mesoporous structure.