Synthesis, Characterization Of Novel Organic-Inorganic Intercalation Compounds And Their Photocatalytic Performace

Layered inorganic materials have been extensively studied due to their ability to intercalate different guest molecules. On the basis of this function, many novel assembly structures can be tailored at the molecular level through the design of the host and the guest species. These organic-inorganic intercalation compounds have been utilized widely in various fields such as catalysts, optical, electric and magnetic materials. In this thesis, layered vanadium pentoxide and V₃O₈ were investigated as host, alkylviologen dications were selected as guest, respectively. In the system of two phases of the liquid and the solid, two novel series of inorganic-organic intercalation compounds were prepared, which were abbreviated RV₂(R=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, nonyl, dodecyl) and RV₃ (R=methyl, ethyl, propyl, butyl, pentyl). These intercalation compounds were characterized by element analysis, XRD, FTIR, XPS, UV-vis DRS and so on. The photocatalytic performance of prepared intercalation materials were evaluated by the dye degradation, oxygenation of α-methylstyrene and Photo-Fries rearrangement of phenyl acetate.The analytical results confirmed that the molecular formula of the intercalation compounds were presented as (RV)_0.25V₂O₅ and (RV)V₃O₈. The interlayer spacing of the organic-inorganic intercalation compounds increases with the increase of the alkyl chain in the alkylviologen cations and the structural regularity of the intercalation compounds is decreased with the increase of the alkyl chain in the alkylviologen cations. The phase of vanadium oxides in the intercalation compounds is composed of mixed-valence vanadium oxides, oxygen atoms are in three different chemical environments, nitrogen atoms are in two different chemical environments. The introduction of alkylviologen cations has little effect on the framework of the layered V₂O₅ or V₃O₈, and the lamellar structure of hosts is basically intact. The synergic effect of the guest and the host can lead to the stabilization of the excited state of organic guest, which is testified by the intensity change of characteristic bands in aromatic rings in FT-IR spectra. The analysis of UV-Vis DRS shows that the...