1篇
您的检索式：作者名="M.L.Valenzuela"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Solid-state synthesis of LnOCl/Ln_2O_3(Ln=Eu, Nd) by using chitosan and PS-co-P4VP as polymeric supports显示文摘A series of lanthanide materials of type LnOCl or Ln_2 O_3(Ln = Eu, Nd) were successfully prepared via a convenient and straightforward two-step procedure. Firstly, and by using chitosan and PS-co-P4 VP as polymeric supports, macromolecular complexes of type chitosan ·LnCl_3 and PS-co-P4 VP·LnCl3 were prepared. These macro molecular complexes were treated in solid state at 800 ℃ under air, leading to the corresponding LnOCl or Ln_2 O_3 materials(Ln = Eu, Nd) with moderate to good yields. The nature of the asprepared lanthanide materials(LnOCl and/or Ln_2 O_3) is strongly influenced by the polymeric template(i.e.,chitosan or PS-co-P4 VP), the lanthanide salt precursor, and the polymer/lanthanide molar ratio. Thus, when chitosan · EuCl_3 and PS-co-P4 VP·EuCl_3 are used as macromolecular precursors, a mixture of crystalline phases of both EuOCl and Eu_2 O_3 are obtained. However, when chitosan· NdCl_3 and PS-co-P4 VP· NdCl_3 are used, a sole pure crystalline phase of NdOCl is obtained. The nano structured lanthanide materials were characterized by means of XRD(X-ray diffraction of powder), SEM, EDS, TEM, and HRTEM. The luminescent spectra of the asprepared EuOCI/Eu_2 O_3 mixture materials show an emission pattern whose intensity is strongly influenced by the nature of the polymeric precursor, as well as on the metal/polymer molar ratios. | C.Diaz D.Carrillo R.de la Campa A.Presa Soto M.L.Valenzuela | 2018 | Journal of Rare Earths2018，36，12： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员