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. 2021 Sep 3;14(17):5060. doi: 10.3390/ma14175060

Figure 1.

Figure 1

FTIR spectra of (a) SBA-15-T, (b) SBA-15-Cal, (c) SBA-15-Ex, (d) SBA-15-NH2, and (e) CB18crown6/SBA-15.