Efficient 1O2 production from H2O2 over lattice distortion controlled spinel ferrites

Iron-based materials are difficult to produce single oxygen (O-1(2)) efficiently from H2O2. Herein, we demonstrate that O-1(2) production from H2O2 can be manipulated by regulating the lattice distortion degrees of spinel ferrite through controlling the contents of Co and Ni in Co1-xNixFe2O4. Typically, NiFe2O4, which owns the lowest lattice distortion degree, can produce O-1(2) as the dominated reactive oxygen species with center dot O-2(-) as the intermediate. Due to the production of O-1(2), the NiFe2O4/H2O2 system removes bisphenol A (BPA) completely within 180 min but removes only -4% of benzoic acid. In addition, the system demonstrates significant resistance to water matrix interference, as 50 mM of Cl-, NO3-, H2PO4-, and humic acid inhibited the BPA degradation by only similar to 0%,similar to 2%,similar to 40%, and similar to 3%, respectively. Our work may shed light for regulating the formation of O-1(2) from H2O2 through the rational design of iron-based catalysts for Fenton-like reactions.

Automated summary

By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.