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A Lamellar MWW Zeolite With Silicon and Niobium Oxide Pillars: A Catalyst for the Oxidation of Volatile Organic Compounds
Author(s) -
Schwanke Anderson Joel,
Balzer Rosana,
Wittee Lopes Christian,
Motta Meira Débora,
Díaz Urbano,
Corma Avelino,
Pergher Sibele
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202000862
Subject(s) - niobium oxide , niobium , zeolite , catalysis , lamellar structure , inorganic chemistry , oxide , stacking , materials science , dehydrogenation , silicon , chemical engineering , chemistry , organic chemistry , metallurgy , engineering
In this work, an MWW‐type zeolite with pillars containing silicon and niobium oxide was synthesized to obtain a hierarchical zeolite. The effect of niobium insertion in the pillaring process was determined by combining a controllable acidity and accessibility in the final material. All pillared materials had niobium occupying framework positions in pillars and extra‐framework positions. The pillared material, Pil‐Nb‐4.5 with 4.5 wt % niobium, did not compromise the mesoporosity formed by pillaring, while the increase of niobium in the structure gradually decreased the mesoporosity and ordering of lamellar stacking. The morphology of the pillared zeolites and the niobium content were found to directly affect the catalytic activity. Specifically, we report on the activity of the MWW‐type zeolites with niobium catalyzing the gas‐phase oxidation of volatile organic compounds (VOCs), which is an important reaction for clean environmental. All produced MWW‐type zeolites with niobium were catalytically active, even at low temperatures and low niobium loading, and provided excellent conversion efficiencies.