Calcium-doped ceria/titanate tabular functional nanocomposite by layer-by-layer coating method

• Published in: Journal of solid state chemistry Vol. 183; no. 7; pp. 1545 - 1549
• Main Authors: W. Liu, Xiang, Devaraju, M.K., Yin, Shu, Sato, Tsugio
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.07.2010; Elsevier
• Subjects: ALKALI METAL COMPOUNDS; ALKALINE EARTH METALS; Applied sciences; CALCIUM; CERIUM COMPOUNDS; CERIUM OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; Coating; COHERENT SCATTERING; COMPOSITE MATERIALS; Cross-disciplinary physics: materials science; rheology; DEPOSITION; DIFFRACTION; DOPED MATERIALS; ELECTRON MICROSCOPY; ELEMENTS; Exact sciences and technology; Ionization properties; Layer by layer; LAYERS; LITHIUM COMPOUNDS; MATERIALS; MATERIALS SCIENCE; METALS; MICROSCOPY; MORPHOLOGY; Nanocomposite; Nanoscale materials and structures: fabrication and characterization; NANOSTRUCTURES; Organic polymers; Other topics in nanoscale materials and structures; OXIDATION; OXIDES; OXYGEN COMPOUNDS; Physicochemistry of polymers; Physics; POTASSIUM COMPOUNDS; Properties and characterization; RARE EARTH COMPOUNDS; SCANNING ELECTRON MICROSCOPY; SCATTERING; SPECTRA; SURFACE COATING; Tabular titanate; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ULTRAVIOLET SPECTRA; UV shielding; VISIBLE SPECTRA; X-RAY DIFFRACTION; Tabular titanate; Nanocomposite; Coating; UV shielding; Layer by layer; Nanoparticle; Cerium oxide; Coatings; Lamellar structure; Calcium addition; Chlorides; Lepidocrocite; Oxidation; Friction test; Scanning electron microscopy; Calcium Titanates; Titanates; X ray diffraction; Polyelectrolyte; Ultraviolet radiation; Morphology; Ultraviolet visible spectrum; Microstructure; Catalyst activity; Nanostructured materials; Energy-dispersive X-ray analysis
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2010.04.040

Ca-doped ceria (CDC)/tabular titanate (K 0.8Li 0.27Ti 1.73O 4, TT) UV-shielding functional nanocomposite with fairly uniform CDC coating layers was prepared through a polyelectrolyte-associated layer-by-layer (LbL) coating method. TT with lepidocrocite-like layered structure was used as the substrate, poly (diallyldimethylammonium chloride) (PDDA) was used as a coupling agent, CDC nanoparticles were used as the main UV-shielding component. CDC/TT nanocomposites with various coating layers of CDC were obtained through a multistep coating process. The phases were studied by X-ray diffraction. The morphology and coating quality were studied by scanning electron microscopy and element mapping of energy dispersive X-ray analysis. The oxidation catalytic activity, UV-shielding ability and using comfort were characterized by Rancimat test, UV-vis spectra and dynamic friction test, respectively. CDC/TT nanocomposites with low oxidation catalytic activity, high UV-shielding ability and good using comfort were finally obtained. Through the control of surface charge of particles calcium-doped ceria/titanate composites with low oxidation catalytic activity, higher UV-shielding ability and excellent comfort was obtained by a facile layer-by-layer coating method.