Photocatalytic Hydrogen Peroxide Production by Graphene Oxide under Sunlight

  • 王 怡升

Student thesis: Master's Thesis

Abstract

Hydrogen peroxide (H2O2) is a clean oxidant and fuel that is desirable in many real-world applications Current industrial manufacturing of H2O2 involves expensive noble metal-based catalysts with high energy demand Searching for more environmentally sustainable process for H2O2 production merits greater attention in research In this work the potential of graphene oxide (GO) an emerging two-dimensional carbon-based nanomaterial as a new photocatalyst toward H2O2 photoproduction driven by solar energy was explored The result indicates that > 1 mM of H2O2 can be photoproduced within 6 h of solar irradiation even without organic electron donors present This is particularly attractive considering that photocatalytic H2O2 production processes usually require organic electron donors To our knowledge the H2O2 photoproduction reported here is among the highest values in related work O2 is needed for this process and greater yield is favorable at increased pH The greater yield at increased pH contrasts the more rapid loss of GO’s long-term photocatalytic stability that can be attributed to greater phototransformation of GO at increased pH Two-electron O2 reduction is the likely pathway toward H2O2 formation The apparent quantum yields (AQYs) were also reported The results indicate that GO is a promising photocatalyst toward H2O2 production that can be driven by renewable sunlight energy under organic electron donor-free condition
Date of Award2016 Aug 25
Original languageEnglish
SupervisorWen-Che Hou (Supervisor)

Cite this

'