Metal–organic framework-derived Co3O4/CoFe2O4 double-shelled nanocubes for selective detection of sub-ppm-level formaldehyde

Constructing complex interior nanostructures by metal-organic framework (MOF)-assisted strategy have attracted tremendous attention in the field of material science. Herein, the Co3O4/CoFe2O4 double-shell nanocubes (CCFO DSNCs) were synthesized by a metal–organic framework (MOF) route. The approach included the formation of a zeolite imidazolate framework-67 (ZIF-67)/Co–Fe Prussian blue analogue (PBA) core–shell nanocubes (CSNCs) precursor and...