Fig. 9From: Flexible Photocatalytic Paper with Cu2O and Ag Nanoparticle-Decorated ZnO Nanorods for Visible Light Photodegradation of Organic DyeThe energy band diagrams of ZnO and Cu2O and the standard reduction potentials for Eqs. (1) and (2). The reduction potential is relative to SHE, which is 4.44 eV below the vacuum levelBack to article page