Abstract
To synthesize pure γ-La2S3 at lower temperature, lanthanide complex La(Et2S2CN)3·phen, containing La-S bond, was chosen as the precursors to decompose. The obtained samples were characterized by X-ray power diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) with an energy dispersive spectrometer and UV-Vis diffuse reflectance spectra. The decomposition mechanism of the lanthanide complex was studied by thermogravimetric analyses (TGA). The results show that the obtained samples are cubic phase particles with sizes among 20–50 nm and the band gap is 2.97 eV, which is bigger than that of its bulk crystal. TG/DTG results indicate that La(Et2S2CN)3·phen decomposed to γ-La2S3 via La4(Et2S2CN)3 as an intermediate product.
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This work was financially supported by the National High-Tech Research and Development Program of China (No.2009AA03Z431).
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Li, Ps., Li, Hy. & Jie, Wq. Preparation and characterization of γ-La2S3 nanoparticles from thermal decomposition. Int J Miner Metall Mater 18, 748–752 (2011). https://doi.org/10.1007/s12613-011-0506-x
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DOI: https://doi.org/10.1007/s12613-011-0506-x