Preparation and characterization of Silicalite-1 zeolites with high manganese contents from mechanochemically pretreated reactants

Takayuki Iida, Mitsutaka Sato, Chiya Numako, Atsushi Nakahira, Shinji Kohara, Tatsuya Okubo, Toru Wakihara

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Silicalite-1 zeolites with high manganese contents isomorphously incorporated within the framework were synthesized by using mechanochemical pretreatment. First, manganese and silica sources were mixed in a planetary ball mill to obtain a composite material comprised of Mn, Si, and O. The composite was subsequently hydrothermally treated to crystallize Silicalite-1 zeolites. The synthesis was performed using a condition with a small amount of water to directly convert the composite material into a zeolite crystal while preventing manganese from leaching into water, which may cause manganese oxide/hydroxide species to precipitate. X-ray fluorescence analysis showed that the obtained products displayed a high manganese content of up to 6.3 mol%. The importance of utilizing mechanochemical treatment was confirmed through a number of characterization techniques, such as X-ray diffraction, catalytic activity assessments, diffuse reflectance UV-vis spectroscopy, Raman spectroscopy, and X-ray absorption fine structure analysis. Our findings suggest that this procedure using mechanochemical pretreatment can produce zeolites with various heteroatoms within their framework structures at contents difficult to achieve through conventional methods.

Original languageEnglish
Pages (from-to)6215-6222
Number of pages8
JournalJournal of Materials Chemistry A
Volume3
Issue number11
DOIs
Publication statusPublished - 2015 Mar 21

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Preparation and characterization of Silicalite-1 zeolites with high manganese contents from mechanochemically pretreated reactants'. Together they form a unique fingerprint.

Cite this