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Germanosilicate Precursors of ADORable Zeolites Obtained by Disassembly of ITH, ITR, and IWR Zeolites

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Author(s)

Mariya Shamzhy, Maksym Opanasenko, Yuyang Tian, Kateryna Konysheya, Oleksiy Shyets, Russell E. Morris, Jiri Cejka

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Abstract

Structure transformation of germanosilicate zeolites ITH, ITR, and IWR containing hydrolytically unstable interlayer Ge-O bonds was investigated and is related to the conditions of acidic treatment (i.e., concentration of hydrochloric acid, temperature, duration). The disassembly of ITH (Si/Ge = 2.5), ITR (Si/Ge = 2.4), and IWR (Si/Ge = 6.9) zeolites under appropriate acidic treatment was demonstrated. Low-concentration acid solutions (e.g., 0.01 M HC1) and low temperatures favor the hydrolysis of the zeolites under study. The chemical composition of the parent zeolites strongly influences the efficiency of hydrolysis. For zeolites having sufficient fraction (ca. 50%) of Ge in D4R units (Si/Ge 6 for ITH and IWR, Si/Ge

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Original languageEnglish
Pages (from-to)5789-5798
Number of pages10
JournalChemistry of Materials
Volume26
Issue number19
DOIs
Publication statusPublished - 14 Oct 2014

    Research areas

  • LARGE-PORE ZEOLITE, LAYERED PRECURSOR, FRAMEWORK DENSITY, MOLECULAR-SIEVES, STRUCTURE ITQ-13, GERMANIUM, TRANSFORMATION, PERSPECTIVES, UNITS, GE

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