A Novel Strong Cyan Luminescence Emission of Tb2O3 Particles

Terbium oxide (Tb2O3) particles (NPs) were synthesized by precipitation method using ammonium carbonate as precipitation agent. Effects of precursor molarity (0.1, 0.15 and 0.2 M) on photoluminescence (PL) behaviour of the NPs were investigated. The presence of the Tb2O3 phase was confirmed by X-Ray Diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR) analyses. Morphological investigations of the produced powders were made by Field Emission Gun-Scanning Electron Microscopy (FEG-SEM). It showed that the morphology of Tb2O3 particles transformed from the nanograin chain to bundles morphology of rod-like as the amount of precursor molarity increased. Emission spectrum were investigated by Photoluminescence (PL) Spectroscopy. All the Tb2O3 particles exhibited the strongest peak at 493 nm ascribed to 5D4-7F6 (magnetic dipole (MD), C2) transition. The increase in the number of C2 sites released from the MD transition with the increase of the precursor molarity caused a negative increase in the b* (yellowness/blueness of the emission) value in the CIE diagram, indicating that the colour shifted to the blue region. The Tb2O3 particles produced by the precipitation method exhibited novel strong cyan colour and the PL emission intensity increased with increasing molarity.

Комбинационное рассеяние света стекловидным тетработатом лития, активированным Tb-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-

Raman spectra of glassy lithium tetraborate activated with terbium oxide of various concentrations were investigated. Most of the observed structure in the Raman spectra of the Li2B4O7: Tb2O3 glass is due to mixed vibrations of complex boron- and terbium-oxygen complexes which are typical to a superposition of tetragonal Li2В4О7 and cubic Tb2О3 structures.

Highly active and durable Pd nanocatalyst promoted by an oxygen-deficient terbium oxide (Tb4O7−x) support for hydrogenation and cross-coupling reactions

Oxygen-deficient Tb4O7−x as an effective promoter and support for Pd nanocatalysts holds great potential in hydrogenation and cross-coupling reactions.

Synthesis of TbMnO3 by Microwave Assisted Method and its Photocatalytic Activity

Using terbium oxide (Tb4O7), manganese acetate (MnC4H6O4·4H2O), citric acid (C6H8O7) and urea (CO(NH2)2) as the main materials, the TbMnO3 was prepared by a facile microwave assisted process. The TbMnO3 samples were characterized by thermogravimetric and differential thermal analysis (TG-DTA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform Infrared (FT-IR) spectroscopy. XRD and SEM demonstrated the successful synthesis of single phase TbMnO3 and an average grain size of 100 nm in diameter. Under UV-light, the photocatalytic activity of TbMnO3 calcination at 800 °C was investigated by decomposition simulation wastewater containing 20 mg/L methyl orange (MO). The degradation rate of methyl orange can arrive to 95% when light irradiation was 180 min in presence of TbMnO3. The results show that TbMnO3 has highly photocatalytic activity for the degradation of methyl orange.