Li, G.; Fu, K.; Xu, F.; Li, T.; Wang, Y.; Wang, J. Approaching High-Performance TS-1 Zeolites in the Presence of Alkali Metal Ions via Combination of Adjusting pH Value and Modulating Crystal Size. Nanomaterials2023, 13, 2296.
Li, G.; Fu, K.; Xu, F.; Li, T.; Wang, Y.; Wang, J. Approaching High-Performance TS-1 Zeolites in the Presence of Alkali Metal Ions via Combination of Adjusting pH Value and Modulating Crystal Size. Nanomaterials 2023, 13, 2296.
Li, G.; Fu, K.; Xu, F.; Li, T.; Wang, Y.; Wang, J. Approaching High-Performance TS-1 Zeolites in the Presence of Alkali Metal Ions via Combination of Adjusting pH Value and Modulating Crystal Size. Nanomaterials2023, 13, 2296.
Li, G.; Fu, K.; Xu, F.; Li, T.; Wang, Y.; Wang, J. Approaching High-Performance TS-1 Zeolites in the Presence of Alkali Metal Ions via Combination of Adjusting pH Value and Modulating Crystal Size. Nanomaterials 2023, 13, 2296.
Abstract
Lewis acid zeolites play an important role in industrially important green reactions closely related to fine chemicals and biomass conversion. Titanium-doped TS-1 zeolite is a milestone Lewis acid zeolite, which widely uses in industrially significant green oxidation processes with hydrogen peroxide as an oxidant under mild conditions. TS-1 Zeolites are normally synthesized in basic condition under hydrothermal treatment. Up to now, it is still not successful to synthesize active TS-1 Lewis acid zeolite by using inorganic alkali, e.g. NaOH or KOH as base, which are cheaper and more stable compared with quaternary ammonium hydroxide or organic amines used in the traditional synthesis. Here, inorganic base of NaOH was firstly employed in synthesizing active TS-1 zeolites. The crucial factor was the control of adverse effects of sodium cations on the incorporation of active titanium cations. A higher catalytic activity could be achieved by further reducing the size of the TS-1 crystal by seed-added strategy, which could approach the catalytic activity of commercial catalyst while the production cost was much lower than the commercial TS-1 catalysts, indicating great commercial potential and the possibility of preparing other cheap Lewis acid catalysts by using inorganic alkali.
Keywords
Zeolites; TS-1; Inorganic alkali; Titanium; Lewis acid; Oxidation
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
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