fig3

Figure 3. (A) 27Al MAS NMR spectra and (B) IR spectra in the hydroxyl-stretching region of PLS-3 zeolites with different Al contents. MAS NMR: Magic angle spinning nuclear magnetic resonance; IR: infrared.
Figure 3. (A) 27Al MAS NMR spectra and (B) IR spectra in the hydroxyl-stretching region of PLS-3 zeolites with different Al contents. MAS NMR: Magic angle spinning nuclear magnetic resonance; IR: infrared.
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