Enhanced visible light photocatalytic activities of template free mesoporous nitrogen doped reduced graphene oxide/titania composite catalysts
| Autor: | Brindha Appavu, Kathiravan Kannan, Sivakumar Thiripuranthagan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Graphene General Chemical Engineering Inorganic chemistry Oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis chemistry.chemical_compound X-ray photoelectron spectroscopy Chemical engineering chemistry law Photocatalysis 0210 nano-technology Mesoporous material Photodegradation Visible spectrum |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 36:184-193 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2016.01.042 |
| Popis: | We report a new photocatalytic material to address the twin issues namely recombination of electron/hole pairs and visible light inactivity of the titania based photocatalysts. A template free hydrothermal method was adapted to synthesize mesoporous nitrogen doped reduced graphene oxide/titania composite catalysts (N-[x% rGO-TiO2] where x = 2.5, 5, 7.5 and 10%). The detailed physicochemical studies of the catalysts were done and correlated with their photocatalytic activities. Simultaneous nitrogen doping on both reduced graphene oxide and titania was confirmed by X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of the synthesized composite catalysts were evaluated towards the photodegradation of organic dyes namely methylene blue and congo red under visible light irradiation. Among them, the composite N-[5% rGO/TiO2] showed the highest photocatalytic activity. Doping of nitrogen makes graphene a better charge transporter whereas nitrogen in TiO2 lattice makes it visible light active (red shift). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect