Preparation of graphene oxide/titanium dioxide nanocomposites and its adsorption for AS(III) ions

摘要

Arsenic is a naturally occurring element, which is found in both in natural waters and industrial waters. Graphene oxide/Titanium dioxide (GO/TiO2) nanocomposites were prepared by using hydrothermal technique, their structure was observed and their adsorption performance for As(III) in water was evaluated. X-ray diffraction and Raman spectroscopy spectra confirmed the anatase structure of the TiO2 nanoparticles. The adsorption system isudmainly depended on the As(III) concentration and follows a pseudo second-order kinetic model. The initial adsorption was rapid and reached equilibrium after 20 min. The overall equilibrium data were well fitted to Langmuir model for the nanocomposites. The adsorption results indicated that the GO/TiO2 nanocomposites can be a good adsorbent material to treat water that contaminated with As(III).