Vanadosilicate with MWW zeolite structure synthesized from VCl 3 by cooperative assembly of organic templates
作者: Thiago F. ChavesAline R. PassosValérie BrioisLeandro MartinsSandra H. PulcinelliCelso V. SantilliJoaquín Pérez-Pariente
作者单位: 1Instituto de Química, Unesp − Univ. Estadual Paulista, Rua Prof. Francisco Degni 55, 14800-060, Araraquara, SP, Brazil
2Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette, F-91192, France
3Instituto de Catálisis y Petroleoquímica, ICP-CSIC, C/Marie Curie 2, 28049, Madrid, Spain
刊名: Microporous and Mesoporous Materials, 2019, Vol.279 , pp.252-261
来源数据库: Elsevier Journal
DOI: 10.1016/j.micromeso.2018.12.030
关键词: MWWVanadosilicateMixed templatesV 3+ and V 4+
英文摘要: Abstract(#br)Aluminum-free MWW structure containing vanadium was easily prepared from a mixture of suitable templates ( N,N,N -trimethyl-1-adamantamonium hydroxide (TMAdaOH) and hexamethyleneimine (HMI)). Besides, the use of VCl 3 as vanadium source, in which this metal is in low oxidation state (V 3+ ) and the preparation of the synthesis gel under inert atmosphere are crucial to get an efficient incorporation of vanadium into the zeolitic framework. UV–Vis spectrum of the as-synthesized material whose oxidation was prevented by working under inert atmosphere reveals the presence of isolated V 3+ sites isomorphically coordinated. Besides, the 29 Si MAS NMR spectra and the V K-edge X-ray Absorption Spectroscopy (XAS) analysis show that the vanadium was incorporated into the zeolite...
全文获取路径: Elsevier  (合作)
影响因子:3.365 (2012)

  • assembly 组装
  • cooperative 合啄
  • structure 构造
  • organic 有机的
  • zeolite 沸石