Synthesis and characterization of gadolinium molybdate nanostructures using the microemulsion synthetic technique
This thesis paper reports the synthesis and characterization of gadolinium molybdate, Gd2(MoO4)3 nanoparticles and/or nanostructures using the microemulsion synthetic technique. In this research, bis(2-methyhexyl)sulfosuccinate sodium salt (NaAOT), an anionic surfactant, and hexadecyltrimethylamonium bromide (CTAB), a cationic surfactant, two aqueous solutions of gadolinium nitrate and of sodium molybdate, and organic solvents of cyclohexane and hexanol as starting materials. This research was based on a previous work published by Yi et al., titled synthesis and characterization of high-efficiency nanocrystal up-conversion phosphors: ytterbium and erbium codoped lanthanum molybdate to compare and prove our findings. According to the stoichiometric ratio of the reaction and the procedures outlined in the specific aims of the research, two molar ratios of water-to-surfactants with value of w=10 and 20 were used. The effect of content and aqueous concentrations on the crystals size structures and morphology properties were investigated and characterized using powder x-ray diffraction and transmission electron microscopy. The results showed that samples of Gd 2(MoO4)3 nanoparticles with sizes were range from 33 nm-41 nm, and 67 nm-79 nm, for CTAB with value of w=10 and 20, and NaAOT with value of w=10 and 20, respectively, exhibited a irregular and random rectangular and hexagonal shapes. These results may bring opportunity for the development of the other Gd2(MoO 4)3 nanoparticles and/or nanostructures using this microemulsion synthetic technique.
Shikheldin B Mohamed,
"Synthesis and characterization of gadolinium molybdate nanostructures using the microemulsion synthetic technique"
ETD Collection for Tennessee State University.