| http://www.w3.org/ns/prov#value | - For the inorganic carrier, preferred are porous oxides concretely including SiO2, Al2O3, MgO, ZrO2, TiO2, B2O3, CaO, ZnO, BaO, ThO2, etc., and their mixtures such as SiO2???MgO, SiO2???Al2O3, SiO2???TiO2, SiO2???V2O5, SiO2???Cr2O3, SiO2???TiO2???MgO, etc.
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