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

Iron-based materials are difficult to produce single oxygen (1O 2) efficiently from H 2 O 2. Herein, we demonstrate that 1O 2 production from H 2 O 2 can be manipulated by regulating the lattice distortion degrees of spinel ferrite through controlling the contents of Co and Ni in Co 1−x Ni x Fe 2 O 4. Typically, NiFe 2 O 4 , which owns the lowest lattice distortion degree, can produce 1O 2 as the dominated reactive oxygen species with·O 2 - as the intermediate. Due to the production of 1O 2 , the NiFe 2 O 4 /H 2 O 2 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-, NO 3 -, H 2 PO 4 -, and humic acid inhibited the BPA degradation by only ∼0%, ∼2%, ∼40%, and ∼3%, respectively. Our work may shed light for regulating the formation of 1O 2 from H 2 O 2 through the rational design of iron-based catalysts for Fenton-like reactions. [Display omitted] • Activating H 2 O 2 to produce 1O 2 by adjusting the lattice distortion of spinel ferrite. • The degree of lattice distortion and the yield of 1O 2 showed a negative correlation. • NiFe 2 O 4 /H 2 O 2 system has selectivity, anti-interference and high H 2 O 2 utilization rate. [ABSTRACT FROM AUTHOR]