Morphology-controlled preparation of iron-based oxides using a paper template

Morphology-controlled iron-based oxides, including Fe2O3, LaFeO3, NiFe2O4, ZnFe2O4, and CoFe2O4, were obtained using filter paper as a template. A thimble filter paper was soaked in ethylene glycol solution of metal nitrates, and the thimble filter paper–metal nitrate composite was calcined to form the desired iron-based oxides with morphology of thimble filter paper. Choice of ethylene glycol as a solvent and slow heating for removal of the paper template are crucial for maintaining the morphology of paper.

Graphical abstractProcedure for production of iron-based oxides with thimble filter paper morphology was reported.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► An easy preparation method of iron-based oxides with thimble filter paper morphology. ► Their structural characterization. ► Key factors for maintaining the morphology.