The flow rates of air and acetylene were set as recommended by
the manufacturer. The FAAS determination of other cations was
performed under the recommended conditions for each metal.
Mesoporous structures were characterized by means of N2
adsorption–desorption isotherm measurements at 77 K with a
BELSORP-mini, BEL Japan, Inc. The TGA measurement was performed
on TA Q50 instrument in the temperature range from ambient to
700 °C. The as-synthesized sample was heated from 25 °C to 700 °C at
a rate of 10 °C/min in a stream of air. The FTIR spectra of materials
were obtained using Bruker EQINOX 50.