Fig. 3

a TGA of nano-silica/4-(2-Aminoethyl)-morpholine, b XRD nano-silica/4-(2-Aminoethyl)-morpholine, BET of nano-silica/4-(2-Aminoethyl)-morpholine including, c Langmuir-plot, d BET-Plot, e t-Plot, f) BJH-Plot, j Adsorption/desorption isotherm diagram