Fig. 5.
Nitrogen sorption isotherms for a raw and acid-treated MWCNTs, b SBA-15 and mesoporous titania, c the 10–30 wt% SBA-15 on MWCNT samples, and d 10 wt% TiO2 on MWCNTs, SBA-15 and 30 wt% SBA-15 coated on MWCNT
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