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. 2018 Jul 21;8(7):556. doi: 10.3390/nano8070556

Figure 11.

Figure 11

Adsorption capacity for methylene blue (MB) of the as-obtained carbon nanotubes (CNTs): (a) UV-Vis of CNTs obtained at different catalyst contents and (b) removal rate for MB; (c) adsorption isotherms and (d) adsorption kinetics of CNTs obtained with 0.75 wt% Ni catalyst.