Synthesis, Characterization, and Photoluminescence Property of LaCO₃OH Microspheres

Abstract

Novel LaCO3OH microspheres with the hexagonal phase were synthesized by a hydrothermal method using La(NO3)(3).6H2O and urea CO(NH2)2 as the starting materials. Various experimental parameters were examined, such as the reaction temperature, the reaction time, and the molar ratios of the starting reagents. The as-synthesized products were characterized by powder X-ray diffraction, transmission electron microscopy, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and photoluminescence (PL). The PL result showed one broad emission band centered at 438 nm (lambdaex=365 nm) of the pure LaCO3OH microspheres. In addition, a possible formation mechanism of LaCO3OH microspheres and the PL property of pure LaCO3OH microspheres were discussed.

Hydrothermal Synthesis of LaCO3OH and Ln3+-doped LaCO3OH Powders under Ambient Pressure and Their Transformation to La2O2CO3and La2O3

“…11 LaCO 3 OH powders have been also prepared by a hydrothermal reaction in an autoclave using the following reagents: LaCl 3 and thiourea, 12,13 La(NO 3 ) 3 and urea, 4,14 La(NO 3 ) 3 , glucose, and acrylamide, 15 La 2 O 3 and glycine, 16 LaCl 3 and gelatin, 17 La(oleate) 3 and aqueous tertbutylamine, 18 La…”

Influence of preparation methods of microwave, sol–gel, and hydrothermal on structural and optical properties of lanthania nanoparticles

“…For example, almost all catalysts used in industrial gas sensors, and protective and optical coatings [11]. Many methods have been used for preparing La 2 O 3 including sol-gel [12], laser deposition [13], chemical vapor deposition [14], solvothermal [15], hydrothermal [16], hydrothermal microemulsion [17], sonochemical method [18], high energy ball milling [19], spray deposition method [20], deposition method [21], and reveres micelles [22].…”

Synthesis of Monodisperse Lanthanum Hydroxide Nanoparticles and Nanorods by Sonochemical Method

“…Although many methods have been developed for the synthesis of lanthanum nanostructures including hydrothermal [25], solvothermal [26], micro emulsion or reverse micelles [27], sol gel [28], laser deposition [29] and other chemical and physical methods; some of these methods are affected by long reaction time, high temperature, high pressure, expensive surface materials (surfactant) and so on.…”