Novel Al2O3–SiO2composite aerogels with high specific surface area at elevated temperatures with different alumina/silica molar ratios prepared by a non-alkoxide sol–gel method

We have developed a new sol–gel route to synthesise Al₂O₃–SiO₂composite aerogels with different alumina/silica (Al/Si) molar ratios using an inexpensive inorganic salt.