화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.36, 184-193, April, 2016
DOI10.1016/j.jiec.2016.01.042  Export Citation
Enhanced visible light photocatalytic activities of template free mesoporous nitrogen doped reduced graphene oxide/titania composite catalysts
Brindha Appavu, Kathiravan Kannan, and Sivakumar Thiripuranthagan†
  • Catalysis Laboratory, Department of Applied Science and Technology, A.C. Tech, Anna University, Chennai 600025, India
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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).
Keywords:Nitrogen doped TiO2;Reduced graphene oxide;Visible light irradiation;Photocatalyst;Mesoporous catalyst
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