Green Synthesis of Zinc Oxide-Graphene Oxide Composite via <i>Ex Situ</i> and <i>In Situ</i> Methods for the Photoassisted Removal of Congo Red Dye: A Comparative Study.

ABSTRACT: Industrial chemical pollutants, such as Congo red (CR) dye, are released into water in large amounts, posing a serious threat to the ecosystem. To deal with this issue, we aimed to synthesize an environmentally friendly nanocatalyst, especially zinc oxide (ZnO) and in situ ZnO-decorated graphene oxide (I-ZnO@GO), using extract as a reducing agent, graphene oxide (GO) was synthesized by a modified hummer method, while ex situ ZnO-decorated-GO (E-ZnO@GO) was prepared via a simple coprecipitation method. These nanocomposites were then used for the photoassisted removal of Congo red dye from wastewater. The optical properties, chemical composition, morphology, thermal stability, and crystallinity of the synthesized nanocomposites were characterized by employing ultraviolet-visibl

SUBMITTER: Asadullah 

PROVIDER: S-EPMC12223809 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature