title: Solvent-free fabrication of rare LaCO3OH luminescent superstructures.
abstract: Lanthanum hydroxycarbonate (LaCO(3)OH) superstructures [LHS] decorated with carbon spheres are synthesized by a solvent-free, one-pot Reactions under Autogenic Pressure at Elevated Temperature (RAPET) process, dissociating a single lanthanum acetate hydrate (LAH) precursor. The structure of the as-synthesized LHS are studied by powder X-ray diffraction, high-resolution transmission electron microscopy, morphology by field-emission scanning electron microscopy, and the composition by energy dispersive X-ray analysis, elemental mapping, as well as FT-IR spectroscopy. The photoluminescence results showed an emission band centered at 465 nm (lambda = exc. 360 nm) for the hexagonal phase of LHS. The mechanistic elucidation for the fabrication of LaCO(3)OH decorated with carbon spheres is developed on the basis of obtained thermal [TGA and DTA] data on initial LAH reactant.
authors.affiliation: IPNS, Argonne National Laboratory, Argonne, Illinois 60439, USA. vilaspol@gmail.com
authors.forename: Vilas G
authors.initials: VG
authors.lastname: Pol
authors.forename: P
authors.initials: P
authors.lastname: Thiyagarajan
authors.forename: Jose M
authors.initials: JM
authors.lastname: Calderon Moreno
authors.forename: Monica
authors.initials: M
authors.lastname: Popa
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis* / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D010777:Photochemistry; D033362:Powder Diffraction; D014961:X-Ray Diffraction
chemical_list: D002254:Carbonates; D049408:Luminescent Agents; D007811:Lanthanum; D002244:Carbon