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CdO nanowires and nanotubes have been synthesized by the two-step temperature-controlled thermal evaporation process without any catalyst. The results demonstrate that CdO nanowires synthesized by vapor–solid mechanism grow along the [1 1 1] direction and their surface is surrounded by polyhedron-shaped CdO nanocrystals. The formation of nanocrystals should be attributed to the existence of dangling bonds in the sidewall of nanowires. We also successfully synthesized CdO nanotubes and deduced their formation mechanism. The difference of growth orientation for nanotubes and nanowires should be most likely linked to processes of nucleation and growth. Furthermore, energy-dispersive X-ray spectrum and X-ray diffraction analysis also testify that the synthesized nanowires and nanotubes have face-centered cubic CdO structures and possess good crystallinity.

Rare earth complex Eu(phen)2Cl3·2H2O synthesized by precipitation method was incorporated into MCM-41 mesoporous molecular sieves which were synthesized via a hydrothermal method. Hybrid inorganic/organic mesoporous luminescent material Eu(phen)2/MCM-41 has been characterized by XRD, TEM, IR, UV-visible spectra and fluorescence spectra. Results indicated that the hybrid mesoporous material has typical structure of MCM-41 and retains the same pore structure as MCM-41 after the assembly process. The fluorescence spectra of these materials present a series of narrow lines assigned to 5D0 → 7F0,1,2,3,4 transitions. The high emission intensity observed is a promising property for application of the rare earth complex in technological luminescent devices.