Graphene is a two dimensional material consisting of a single layer of carbon atoms arranged in a regular hexagonal pattern similar to graphite, but in a one-atom thick sheet!
Aim of the project
is to develop simple and efficient methods for synthesizing TiO2 catalysts coupled with graphene, and to study their photocatalytic performance under solar radiation for the degradation of various emerging organic pollutants.
WP1: Project Management
Management and coordination of the project
Establishment of a Steering Committee
Monitoring of the technical and economic progress
Preparation of Deliverable reports, Interim and Final Reports
WP2: Dissemination of Results
Creation of project website
Publications in internationally accredited relevant scientific journals
Participation in national-international conferences
Organization of a workshop at national level
Publications of articles to Greek and Cypriot press
WP3: Synthesis of TiO2-Reduced Graphene Oxide (RGO) composite photocatalysts
Synthesis of TiO2-reduced graphene oxide composite photocatalysts and optimization of important preparation conditions.
Application of three different methodologies for the reduction of graphene oxide (GO) and the simultaneous formation of TiO2-RGO composite catalysts:
Photocatalytic method: GO will be reduced photocatalytically by TiO2with the simultaneous formation of TiO2-RGO composites
Hydrothermal method: GO will be reduced hydrothermally in the presence of TiO2
Microwave method: GO will be reduced by microwave irradiation in the presence of TiO2.
WP4: Characterization of the synthesized photocatalysts and toxicity measurements
Characterization of the synthesized photocatalysts in terms of particle and surface properties using various techniques.
Toxicity evaluation of the synthesized photocatalysts using model bacterial species (Enterococcus sp., Staphylococcus sp., Escherichia coli & Klebsiella sp.) and an aquatic organism (Daphnia magna). In particular, the toxicity evaluation will include:
Determination of the concentrations at which the synthesized catalysts are toxic to our test organisms.
Determination whether initial concentration of test organisms plays important role concerning toxicity effects.
Assessment of chronic toxicity based on the acute toxicity results
WP5: Testing photocatalytic efficiency of the TiO2-RGO catalysts for the degradation of emerging organic pollutants
Evaluation of the photocatalytic efficiency of the synthesized TiO2-RGO catalysts under simulated solar light radiation by measuring the degradation of a mixture of 4 emerging organic pollutants in aqueous solutions.
Comparison of the relative photocatalytic activity of the various catalysts synthesized by implementing a two-level factorial design and optimization of the important preparation conditions.
Study of the stability of the synthesized photo-catalysts after repeated use.
WP 6: Design, setup and operation of a bench scale pilot treatment unit
Design, setup and operation of a bench scale pilot treatment unit, operating in a continuous mode, consisting of a photochemical reactor and a cross-flow micro-filtration system for the recovery and reuse of the catalyst.
Screening of various commercially available micro-filtration membrane modules (polymeric ceramic membranes)
Study of the various parameters affecting the performance of the treatment unit and finding the optimum operating conditions.