Enhanced photocatalytic activity of Ni-doped BiFeO3 nanoparticles for degradation of bromophenol blue in aqueous solutions

Underlying physics and chemistry of ferroic-photocatalysis: a critical review

“…89 Likewise, Ag doped PbTiO 3 nanoparticles show k = 0.01819 min −1 , 90 BiVO 4 nanoparticles show k = 0.00388 min −1 , 91 and BiFeO 3 nanoparticles show k = 0.0144 min −1 compared to P25 showing only k = 0.00251 min −1 in the degradation of methylene blue (MB). 92,93 The corresponding difference arises from the systematic polarization effect associated with DWs. In positive polarity (H–H CDWs) with downward band bending, the electrons while carrying out reduction at C + produce ˙O 2 − from O 2 , whereas in negative polarity (T–T CDWs) with upward band bending the holes carrying oxidation at C − produce ˙OH − from OH − or H 2 O.…”