Nd-doped MoN was prepared by thermal permeation of rare earth Nd in MoN using FeMo6 as the precursor. XRD, DTA, XPS and XRF have been used to characterize the FeMo6 precursor and the thermal treated samples. XRD, XPS and XRF results show that FeMo6 structure is decomposed and Nd-doped MoN is formed during the thremal treatment. XPS results also give the evidence that it is Nd3+ ion that can be permeated into the bulk of MoN. The conductivity of MoN is increased from 0.228 S·cm-1 to 2.649 × 102 S·cm-1 by Nd doping.
Potassium tungsten bronze KxLayWO3 (x>0.5 and y<0.01) was synthesized by rare earth co-permeation method using α-K7[SiMg3(OH2)3W9O37] as the precursor. Binding energies of La, W, O and C were determined by XPS. From the XPS data, a peak at 34.21 eV indicates that some W6+ turned into W5+ by rare earth co- permeation. The binding energies La3d were the same in the surface and inner of the composite, showing that rare earth element La could diffuse into the body of the composite and the compound of KxLayWO3 was formed at the same time. The binding energies of O1s in KxLayWO3 surface were 531.4 eV and 532.0 eV, respectively, while peak at 531.4 eV disappeared through etching process. The result implies that the binding energy of 531.4 eV was due to the adsorbent O. In addition, the binding energies of C1s in the surface were 283.5 eV, 285.0 eV and 286.7 eV respectively, while the inner had only one peak at 285.0 eV due to standard C1s. This proves that there was no C in the core.
