Preparation of superhydrophilic mesoporous SiO2 thin films

► Mesoporous SiO2 thin films are prepared with a simple method. ► Films are colorless and transparent. ► Films perform the superhydrophilicity without UV light irradiation. ► Increasing thickness of films will improve the superhydrophilicity. ► Films can keep superhydrophilic after exposed to air for 3 months.