Size and morphology control of Y 2 O 3 nanopowders via a sol–gel route

Controlling the morphology of yttrium oxide through different precursors synthesized by hydrothermal method

“…This result shows that pH value is the predominant factor in strong basic media and the morphologies are less dependent on reaction temperature as compared with pH value. This morphology is familiar for hexagonal Y(OH) 3 . Many researches [8][9][10][11]17] have previously reported the synthesis of Y(OH) 3 and corresponding Y 2 O 3 nanotubes under strong basic conditions using NaOH or KOH as base.…”

“…Samples were heated in air with a ramp rate of 5 ºC/min. The content of NO 3 -of the samples heated at different temperatures was measured using a Dionex DX-120 ion-chromatograph analyzer. The samples were dissolved in 5 ml of 1 mol/L H 2 SO 4 and then diluted to 50 ml.…”

“…Industrially, yttrium oxide is produced by solid state decomposition reaction at high temperatures. Gas-phase condensation [1], precipitation [2], sol-gel processing [3], combustion [4], pyrolysis [5], and recently, hydrothermal synthesis [6][7][8][9][10][11][12][13][14][15][16][17] are other physical and chemical techniques for preparation of yttrium oxide include Hydrothermal synthesis is widely accepted as a simple and mild method to prepare high crystalline materials with controlled particle size. Recently, the hydrothermal synthesis of yttrium oxide attracted increasing attention owing to the prospects of producing high-quality, welldispersed crystals as well as the convenience in preparing homogeneous doped materials.…”

Synthesis characterization and luminescence studies of 100MeV Si8+ ion irradiated sol gel derived nanocrystalline Y2O3

“…The ratio of citric acid/Y 3+ consider to be 2 [13]. Stoichiometric amount of yttrium nitrate is dissolved in double distilled water and then the solution is refluxed at room temperature for 3 h and then slowly added citric acid which acts as a chelating agent and again refluxed at 75-80°C for 1 h and then adjusted the pH to 2 by adding 25% aqueous ammonia solution.…”

Preparation of SiO2-CuO-CeO2 Composite Powders and Its Thin Film Templated with Oxalic Acid

“…Organic acid, especially oxalic acid is more effective and eco-friendly because of its acid strength, complex and/or chelating ability as template and iron-contaminate removal reagent. 5) This acid has the ability to increase the pore size and specific surface area generating mesoporous materials with high metallic oxide dispersion or doping at grain boundary of the support. The chelating agent as a template with the role of acid catalyst has used to obtain the mixed oxide composites with having a different size/shape and also to improve the surface area.…”