Pore-size Tuning of Highly Selective Organic–Inorganic Hybrid Silica Membranes by Solid-phase Post-treatment at Low Temperature

Highly selective organic–inorganic hybrid membranes were prepared at low temperature (less than 100 °C) from 1,2-bis(triethoxysilyl)ethane (BTESE) with HCl-assisted solid-phase post-treatment, which increased pervaporation dehydration selectivity dramatically from 4 to 2900.