Synthesis and morphological control of rare earth oxide nanoparticles by solvothermal reaction

Microwave-assisted solvothermal synthesis and characterization of SnO2:Eu3+ phosphors

“…The result indicates that the crystallite size of SnO 2 :Eu 3+ decreased with increasing ethanol ratio in the solvent. It is considered that low dielectric constant of ethanol tends to reduce the solubility of the solute and the ion diffusion rate [21], thereby restricting the crystallite growth. A similar phenomenon was also observed in the synthesis of Y 2 O 3 and K 2 Ti 4 O 9 using ethanol as the solvent [22,23].…”

Controllable Synthesis of Y2O3 Microstructures for Application in Cataluminescence Gas Sensing

“…[2] Yttrium oxide and its derivatives are attractive materials for their unique optical and electronic qualities and good catalytic properties towards many reactions, and have been used in a broad range of fields, such as optics and optoelectronics, [3] advanced ceramics, [4] chemical sensors, [5] catalysis, [6] and energy conversion and storage devices. [7] In the last decade, various shapes of solid materials, such as nanorods, nanotubes, nanoplates, microspheres, nanopolyhedra, and other polymorphic forms, have been synthesized by a variety of techniques such as solution-based sol-gel processing, [8] combustion, [9] microemulsion techniques, [10] co-precipitation, [11] hydrothermal/solvothermal synthesis, [12] thermolysis, [13] electrochemical methods, [14] solid/liquid-phase chemical routes, [15] and combinations thereof. Among the methods used in nanomaterials synthesis, owing to its great chemical flexibility and synthetic reliability, [16] hydrothermal synthesis has emerged as a powerful technology to prepare high-quality anisotropic architectures, such as nanorods, nanowires, nanobelts, nanotubes, and nanosheets, as well as even more complex fullerene-like Y 2 O 3 .…”

Solvothermal and hydrothermal processes: the main physico-chemical factors involved and new trends

“…OH] improved the crystal growth rate compared to the nucleation rate and, in parallel, induced the formation of oxygen vacancies leading to more free electrons and higher conductivity [94]. The role of the viscosity of the solvent has also been underlined for the morphological control of rare earth oxide nanoparticles by solvothermal reaction [95].…”