Highly-controlled grafting of mono and dicationic 4,4′-bipyridine derivatives on SBA-15 for potential application as adsorbent of CuCl2 from ethanol solution

► Highly controlled grafting of 4,4′-bipyridine alkoxysilane derivatives inside the SBA-15 channels. ► Copper adsorption from ethanol. ► Efficient adsorption of anionic copper complexes in the chemically modified SBA-15.