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. 2022 Apr 15;27(8):2557. doi: 10.3390/molecules27082557

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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XRD test and BET test of NMGM catalyst with Na₂O/SiO₂ of 0.8 at hydrothermal time of 0 d, 1 d, 2 d, 3 d: (a) XRD (*: characteristic peaks of NaA molecular sieves), (b) pore-size distribution, (c) specific surface area.