Fig. 3From: High Photocatalytic Performance of Two Types of Graphene Modified TiO2 Composite PhotocatalystsCharacterizations of various composite photocatalysts. a IR curves and b PL patterns of various photocatalyst, EPR spectra of radical adduct trapped by 5,5-dimethyl-1-pyrroline-N-oxide under c UV-light and d visible-light irradiationBack to article page