Abstract
Treating titanium silicalite (TS-1) with ammonia solution under hydrothermal conditions proves to be an effective post-synthesis modification method for improving TS-1 catalytic activity in propylene epoxidation. Characterizations indicate that the treated TS-1 did not change TS-1 composition and generate more Ti (IV)-superoxide species (gz = 2.0265, gy = 2.0090, gx = 2.0022) when interacting with aqueous H2O2(30 wt.%) compared with the as-synthesized one.
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