10.1007/s40089-015-0143-x

Lanthanum cerate (La2Ce2O7): hydrothermal synthesis, characterization and optical properties

HTML PDF
  • Shahin Khademinia1,
  • Mahdi Behzad*1,
  1. Department of Chemistry, Semnan University, Semnan, 35351-19111, IR
Cover Image

Published in Issue 2015-03-03

How to Cite

Khademinia, S., & Behzad, M. (2015). Lanthanum cerate (La2Ce2O7): hydrothermal synthesis, characterization and optical properties. International Nano Letters, 5(2 (June 2015). https://doi.org/10.1007/s40089-015-0143-x
Crossref
Scopus
Google Scholar
Europe PMC

HTML views: 49

PDF views: 128

Abstract

Abstract La 2 Ce 2 O 7 nano-powders were synthesized via a hydrothermal reaction in a deionized water ( S 1 ) and in a 2 M NaOH aqueous solution ( S 2 ) at 180 °C for 48 h. La(NO 3 ) 3 ·H 2 O and (NH 4 ) 2 Ce(NO 3 ) 6 were used in the stoichiometric 1:1 La:Ce molar ratio as raw materials. The obtained materials were crystallized in a cubic crystal structure with space group. The synthesized materials were characterized by powder X-ray diffraction technique and Fourier-transform infrared spectroscopy. To investigate the effect of the basic solution on the morphology of the obtained materials, the morphologies of the synthesized materials were studied by field emission scanning electron microscopy technique. The technique showed that the morphology of La 2 Ce 2 O 7 samples changed from grain to rod-like structure in presence of the basic solution. Cell parameter refinements showed that these parameters were larger for S 2 than those for S 1 . Photoluminescence and ultraviolet visible spectra of the synthesized nanomaterials were also investigated.

Keywords

  • La2Ce2O7,
  • Hydrothermal,
  • Nano materials,
  • PXRD
HTML PDF

References

  1. Thomson et al. (1999) An oxygen-rich pyrochlore with fluorite composition (pp. 56-62) https://doi.org/10.1006/jssc.1999.8347
  2. Kishimoto, H., Omata, T., Otsuka-Yao-Matsuo, S., Ueda, K., Hosono, H., Kawazoe, H.: Crystal structure of metastable κ-CeZrO
  3. 4
  4. phase possessing an ordered arrangement of Ce and Zr ions. J. Alloys Compd. 312, 94–10 (32000)
  5. Haynes et al. (2008) Catalytic partial oxidation of n-tetradecane using pyrochlores: effect of Rh and Sr substitution (pp. 206-213) https://doi.org/10.1016/j.cattod.2008.02.012
  6. Kieffer et al. (1997) Hydrogenation of CO and CO2 toward methanol, alcohols and hydrocarbons on promoted copper-rare earth oxides catalysts (pp. 15-24) https://doi.org/10.1016/S0920-5861(96)00191-5
  7. Matsuhira, K., Wakeshima, M., Hinatsu, Y., Takagi, S.: J. Phys. Soc. Jap. 80 (2011)
  8. Brik et al. (2011) Enhanced phytoremediation potential of polychlorinated biphenyl contaminated soil from e-waste recycling area in the presence of randomly methylated-[beta]-cyclodextrins (pp. 1671-1676) https://doi.org/10.1016/j.optmat.2011.05.008
  9. Ross et al. (2011) Dimensional evolution of spin correlations in the magnetic pyrochlore Yb2Ti2O7 https://doi.org/10.1103/PhysRevB.84.174442
  10. Gill et al. (2011) Ionic conductivity, structural and thermal properties of pure and Sr2+ doped Y2Ti2O7 pyrochlores for SOFC (pp. 1960-1966) https://doi.org/10.1016/j.solidstatesciences.2011.08.025
  11. Yamamura et al. (2003) Crystal phase and electrical conductivity in the pyrochlore-type composition systems, Ln2Ce2O7 (Ln=La, Nd, Sm, Eu, Gd, Y and Yb) (pp. 902-906) https://doi.org/10.2109/jcersj.111.902
  12. Lin et al. (2009) Stable proton-conducting Ca-doped LaNbO4 thin electrolyte-based protonic ceramic membrane fuel cells by in situ screen printing https://doi.org/10.1016/j.jallcom.2008.11.058
  13. Yan et al. (2010) Effect of Sm-doping on the hydrogen permeation of Ni–La2Ce2O7 mixed protonic–electronic conductor https://doi.org/10.1016/j.ijhydene.2010.02.134
  14. Lopes et al. (2009) Determination of RE2Ce2O7 pyrochlore phases from monazite–allanite ores (pp. 167-172) https://doi.org/10.1016/j.hydromet.2009.02.007
  15. Fang et al. (2010) CO2-resistant hydrogen permeation membranes based on doped ceria and nickel (pp. 10986-10991) https://doi.org/10.1021/jp102271v
  16. Tao et al. (2010) A stable La1.95Ca0.05Ce2O7−δ as the electrolyte for intermediate-temperature solid oxide fuel cells (pp. 3481-3484) https://doi.org/10.1016/j.jpowsour.2009.12.047
  17. Zhu et al. (2012) A mixed electronic and protonic conducting hydrogen separation membrane with asymmetric structure (pp. 12708-12713) https://doi.org/10.1016/j.ijhydene.2012.06.033
  18. Weng et al. (2013) Autothermal steam reforming of ethanol over La2Ce2−xRuxO7 (x = 0–0.35) catalyst for hydrogen production (pp. 359-366) https://doi.org/10.1016/j.apcatb.2013.01.025
  19. Besikiotis et al. (2012) Crystal structure, hydration and ionic conductivity of the inherently oxygen-deficient La2Ce2O7 (pp. 1-7) https://doi.org/10.1016/j.ssi.2012.08.023
  20. Wang et al. (2014) Influence of different surfactants on crystal growth behavior and sinterability of La2Ce2O7 solid solution (pp. 4305-4310) https://doi.org/10.1016/j.ceramint.2013.08.096
  21. Song, Z.H., Ge, C.X., Gang, L., Li, W.X., dan, D.X.: Influence of Gd
  22. 2
  23. O
  24. 3
  25. addition on thermophysical properties of La
  26. 2
  27. Ce
  28. 2
  29. O
  30. 7
  31. ceramics for thermal barrier coatings. J. Eur. Ceram. Soc. 32, 3693–3700 (2012)
  32. Song et al. (2012) Investigation about thermal conductivities of La2Ce2O7 doped with calcium or magnesium for thermal barrier coatings (pp. 141-146) https://doi.org/10.1016/j.jallcom.2012.05.036
  33. Ma et al. (2010) Thermal cycling behavior of La2Ce2O7/8YSZ double-ceramic-layer thermal barrier coatings prepared by atmospheric plasma spraying (pp. 3366-3370) https://doi.org/10.1016/j.surfcoat.2010.03.053
  34. Ling et al. (2010) A cobalt free SrFe0.9Sb0.1O3-d cathode material for proton-conducting solid oxide fuel cells with stable BaZr0.1Ce0.7Y0.1Yb0.1O3-d electrolyte (pp. 7042-7045) https://doi.org/10.1016/j.jpowsour.2010.05.015
  35. Ma et al. (2008) Novel thermal barrier coatings based on La2Ce2O7/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition (pp. 2704-2708) https://doi.org/10.1016/j.surfcoat.2007.09.047
  36. Wang et al. (2012) Synthesis of monodispersed La2Ce2O7 nanocrystals via hydrothermal method: a study of crystal growth and sintering behavior (pp. 242-246) https://doi.org/10.1016/j.ijrmhm.2011.12.002
  37. Bae et al. (2004) The crystal structure of ionic conductor LaxCe1−xO2-x/2 (pp. 1291-1294) https://doi.org/10.1016/S0955-2219(03)00499-0
  38. Ma et al. (2007) Thermal cycling behavior of lanthanum-cerium oxide thermal barrier coatings prepared by air plasma spraying. High-performance ceramics IV, PTS 1-3 (pp. 1759-1761) https://doi.org/10.4028/www.scientific.net/KEM.336-338.1759
  39. Méndez et al. (2010) Sol–gel Pechini synthesis and optical spectroscopy of nanocrystalline La2O3 doped with Eu3+ (pp. 1686-1692) https://doi.org/10.1016/j.optmat.2010.02.018
  40. Liu et al. (2010) Tunable cathodoluminescence properties of Tb3+-doped La2O3 nanocrystalline phosphors (pp. P1-P6) https://doi.org/10.1149/1.3262007
  41. Hu et al. (2007) La(OH)3 and La2O3 nanobelts—synthesis and physical properties (pp. 470-474) https://doi.org/10.1002/adma.200601300
  42. Li and Bing (2009) CeO2–Bi2O3 nanocomposite: two step synthesis, microstructure and photocatalytic activity (pp. 776-779) https://doi.org/10.1016/j.jnoncrysol.2009.04.003
  43. Ansari, A.A., Singh, S.P., Malhotra, B.D: Optical and structural properties of nanostructured CeO
  44. 2
  45. :Tb
  46. 3+
  47. film. J. Alloy Compd. 509, 262–265 (2011)