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Issue 46, 2018
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Zeolitic intralayer microchannels of magadiite, a natural layered silicate, to boost green organic synthesis

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Abstract

Despite the considerable attention given to the applications of magadiite in previous research, the properties of this natural layered silicate have remained mysterious due to the lack of crystal structure information. On the other hand, no one has doubted the intercalation capability between the layers. Here we succeed in determining the structure of magadiite using X-ray pair distribution functions and synchrotron powder diffractometry. We discover unexpected zeolitic microchannels within the layers. We describe efficient synthesis of 100% pure benzoic acid from toluene by using magadiite as an additive in a TiO2 photocatalytic system oxidizing toluene. Based on the uncovered structure of magadiite, we clarify the mechanism of this unique photocatalytic system: the microchannels of magadiite not only separate/accommodate the desired partially oxidized product formed on TiO2 but also prevent the accumulation of the overoxidized products on the TiO2 surface that deactivates the photocatalytic activity.

Graphical abstract: Zeolitic intralayer microchannels of magadiite, a natural layered silicate, to boost green organic synthesis

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Supplementary files

Article information


Submitted
20 Aug 2018
Accepted
01 Nov 2018
First published
02 Nov 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2018,9, 8637-8643
Article type
Edge Article

Zeolitic intralayer microchannels of magadiite, a natural layered silicate, to boost green organic synthesis

Y. Ide, S. Tominaka, H. Kono, R. Ram, A. Machida and N. Tsunoji, Chem. Sci., 2018, 9, 8637
DOI: 10.1039/C8SC03712D

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