The visible light degradation activity and the photocatalytic mechanism of tetra(4-carboxyphenyl) porphyrin sensitized TiO2

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO2 nanocomposite for visible light photoactivity improvement

“…In the TGP compound, upon irradiation of light, the TCPP molecule is excited into the singlet state . The photogenerated electron from TCPP transfers to the conduction band of TiO 2 . The collected electrons in the conduction band of TiO 2 are transferred to the FTO through the 2D graphene network in the TGP compound .…”

New insights into the origin of the visible light photocatalytic activity of Fe(iii) porphyrin surface anchored TiO2

“…The peak at 531.9 eV is related to oxygen bonded to Ti metal as Ti-O and the other peak at~529.7 eV can be assigned to the oxygen bonded to carbon as Ti-O-C in the case of H-TiO 2 . 23 The anchoring of Hemin on the TiO 2 surface through chemisorption is further substantiated by the presence of the C 1s (284 eV), N 1s (398.8 eV) and Fe 2p (710.7 eV) bands. In the N 1s spectrum (Fig.…”

Construction of carbon quantum dots/single crystal TiO2 nanosheets with exposed {001} and {101} facets and their visible light driven catalytic activity

“…6,7 However, there are some strategies to make anatase TiO 2 active in the visible light region. Heteroelement structures such as doping, [8][9][10][11] p-n heterojunctions, 12,13 metal/semiconductor Schottky junctions 14,15 and dye sensitization [15][16][17] are proven to be effective ways to extend the absorption range into the visible light region. For example, N-doped TiO 2 creates a hybrid orbital above the VB of TiO 2 by imbedding an N atom into the lattice of TiO 2 (ref.…”