Selective adsorption and decomposition of pollutants using RGO-TiO₂ with optimized surface functional groups.

ABSTRACT: Reduced graphene oxide (RGO) samples with optimized types of surface functional groups were hybridized with TiO₂ to achieve the selective adsorption and removal of various pollutants. A high ratio of hydroxyl groups was found to be remarkably advantageous for the adsorbtion and decomposition of rhodamine-B (and similar pollutants), while a high ratio of carboxyl groups was found to promote the ability to adsorb and decompose phenol. Moreover, the presence of carboxyl groups on the RGO edge provides a pre-condition to form a close chemical connection with TiO₂, which has been proven by the obtained electron paramagnetic resonance (EPR) curve, infrared spectroscopy (IR) and electron lifetime. The resulting composite photocatalysts display excellent photocatalytic activi

SUBMITTER: Sun Y 

PROVIDER: S-EPMC9085896 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature