In this work, reduced graphene oxide/titanium dioxide (rGO/TiO2) composite material was immobilized on shrink thermoplastic film using layer-by-layer (LBL) self-assembly to remove pollutants in water, and the results were compared with immobilized TiO2 on glass and shrink thermoplastic film. The structural and morphological properties of the immobilized photocatalysts were investigated using atomic force microscope and scanning electron microscope. The photocatalytic efficiency was measured by photodegradation of methylene blue under solar light illumination. The immobilized rGO/TiO2 on shrink thermoplastic film showed doubled photocatalytic efficiency than TiO2 on glass substrate, and no decrease of photocatalytic efficiency was shown after 5 h of operation. The use of shrink thermoplastic film and the introduction of graphene material contribute to an increase in catalytic efficiency of 63% and 28%, respectively. These results lead us to believe that the LBL self-assembled rGO/TiO2 composite on shrink thermoplastic film could be used in photocatalytic degradation of other water pollutants.
Bibliographical noteFunding Information:
Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundation through the National Nano Coordinated Infrastructure Network (NNCI) under Award Number ECCS-1542202. This work was partially sponsored by Environment and Natural Resources Trust Fund (ENRTF) funding in Minnesota State.