The inner surface of HNTs is positively charged in the aqueous solution to attract MO anions, so MO that enters the nanotubes may be adsorbed in the tube in this way.
The inner surface of HNTs, which is positively charged in aqueous solution, has an attractive effect on MO anions, so mo entering the nanotube may thus be adsorbed into the tube.
The inner surface of HNTs is positively charged in aqueous solution and attracts Mo anions, so Mo entering the nanotubes may be adsorbed in the tubes.<br>