Three-dimensional flowerlike iron oxide nanostructures: Morphology, composition and metal ion removal capability

Journal Article · Thu Jan 14 23:00:00 EST 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.08.008· OSTI ID:22584247

Wang, Dan ^[1]; Yang, Ping ^[1]; Huang, Baibiao ^[2]

---

1. School of Material Science and Engineering, University of Jinan, 250022 Jinan (China)
2. State Key Laboratory of Crystal Materials, Shandong University, 250100 Jinan (China)

Graphical abstract: The iron alkoxide precursors are calcined into α-Fe{sub 2}O{sub 3}, Fe{sub 3}O{sub 4} microstructures with different morphologies by changing calcination atmosphere, reaction time of precursors and calcination temperature simply. The Fe{sub 2}O{sub 3}/Ag hybrid composites prepared through aqueous synthesis and light irradiation. - Highlights: • α-Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} microstructures with different morphologies were created. • Solvents play an important role for the solvothermal treatment of precursors. • The α-Fe{sub 2}O{sub 3} microstructures show excellent adsorption properties. • Fe{sub 2}O{sub 3}/Ag hybrid composites were prepared to improve their properties. - Abstract: The flower-like precursors of Fe alkoxide constructed by the self-assembly of nanoflakes were prepared. Time-dependent experiments confirmed the formation mechanism of flower-like precursors. After calcination, α-Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} nanostructures with different morphologies were created. Fe{sub 3}O{sub 4} nanostructures containing blocks with a truncated octahedron structure were obtained under N{sub 2} protection. α-Fe{sub 2}O{sub 3} nanostructures were prepared in an air atmosphere. The values of maximum adsorption capacity of α-Fe{sub 2}O{sub 3} nanostructures for Cr{sup 6+} ions were much higher than that of commercial bulk α-Fe{sub 2}O{sub 3}. Ag NPs were deposited on α-Fe{sub 2}O{sub 3} nanostructures through an aqueous synthesis and light irradiation using L-cysteine as a linker. Such procedure is utilizable for the preparation of the composites of noble metals and magnetic materials.

• OSTI ID: 22584247
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 73; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
AIR
ALKOXIDES
CALCINATION
CHROMIUM IONS
CRYSTAL GROWTH
CYSTEINE
IRON OXIDES
IRRADIATION
MICROSTRUCTURE
MORPHOLOGY
NANOSTRUCTURES
PRECURSOR
SYNTHESIS
THREE-DIMENSIONAL LATTICES
TIME DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
VISIBLE RADIATION