EPR studies of electron and hole trapping in titania photocatalysts

@inproceedings{Macdonald2012EPRSO,
  title={EPR studies of electron and hole trapping in titania photocatalysts},
  author={James Ross Macdonald and Shona Rhydderch and Emily Holt and Neil Grant and John M. D. Storey and Russell Francis Howe},
  year={2012}
}
In situ EPR spectroscopy at cryogenic temperatures is used to observe paramagnetic products formed when titania photocatalysts are irradiated with UV–visible light in the presence of reactant molecules. Irradiation in vacuo, in the absence of reactants, produces weak EPR signals of trapped holes (O−) and trapped electrons (Ti3+). When high photon fluxes are used, the intensities of the trapped electron signals are enhanced dramatically when irradiation is stopped. This process is completely… CONTINUE READING
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