LaPO4 and CePO4 nanorods/nanowires with controlled aspect ratios have been successfully synthesized using a hydrothermal microemulsion method under mild conditions. It has been shown that the obtained LaPO4 has a monoclinic structure, while CePO4 exists in the hexagonal structure. Uniform nanorods/nanowires with diameters of 20-60nm and lengths ranging from several hundreds of nanometres to several micrometres were obtained. The aspect ratios of the obtained 1D nanostructures can be fine-tuned by simply changing the [H2O]/[surfactant] molar ratios. The possible growth mechanism of LaPO4 and CePO4 nanorods/nanowires was explored in detail.

The decatungstomolybdoniobogermanic heteropoly acid H5 [GeW10MoNbO40] 20H2O has been prepared for the first time. The optimal proportion of the solutions of the component and the pH of the synthesis reaction are given. The product was characterized by chemical analysis, conductometric and potentiometric titration, IR, UV, XRD, 183W NMR and TG-DTA. The IR, UV, XRD and 183WNMR indicate that H5 [GeW10MoNbO40] 20H2O possesses the Keggin structure. The TG-DTA curve shows the sequence of water loss in the acid, the amount of the loss as well as the thermostability of the acid.

A new solid high-proton conductor decatungstomolybdovanadogermanic heteropoly acid (HPA) H5GeW10- MoVO40 21H2O has been synthesized for the first time by stepwise acidification and stepwise addition of solutions of the component elements. The product was characterized by chemical analysis, potentiometric titration, IR, UV, XRD and TG-DTA. The IR, UVand XRD indicate that H5GeW10MoVO40 21H2O possesses the Keggin structure. The TG-DTA curve shows the sequence of water loss in the acid, the amount of the loss, as well as the thermostability. The results of AC impedance measurement show that its proton conductivity is 3.58×10-4 S cm-1 at 18℃ and the activation energy for proton conduction is 31.82kJ/mol.

Heteropoly acid of Keggin structure tungstovanadogermanic (H5GeW11VO40) has been chemically anchored to the modified SBA-15 surface. The material was characterized by solid-state 29Si MAS NMR, FT-IR spectroscopy, XRD, TG-DTA and N2 adsorption experiments. The preservation of the structure of the HPA and dispersion of the cluster on the support were verified. On the bases of the spectroscopic evidences, HPA clusters were attached firmly to the surface.

Polypyrrole (PPy) hybrid material doped vanadotungstogermanic triheteropoly acid was prepared for the first time. Their SEM, IR and XRD patterns confirm the existence of Keggin anions and form the space reticular structure. The material exhibits excellent proton conduction, its proton conductivity is 1.24×10−2 S cm−1 at room temperature (18℃).