Show simple item record

AuthorBa-Abbad, Muneer M.
AuthorTakriff, Mohd S.
AuthorBenamor, Abdelbaki
AuthorMohammad, Abdul Wahab
Available date2020-12-03T11:24:56Z
Publication Date2017
Publication NameJournal of Sol-Gel Science and Technology
ResourceScopus
URIhttp://dx.doi.org/10.1007/s10971-016-4228-4
URIhttp://hdl.handle.net/10576/17188
AbstractAbstract: Haematite (?-Fe2O3) nanoparticles (NPs) of different sizes and morphologies were prepared from two different iron precursors (iron acetate (A) and iron nitrate (N)) using the sol�gel technique, through a reaction with oxalic acid. A pure ?-Fe2O3 phase (rhombohedral) that contained particles of different sizes and shapes were obtained from both iron precursors. Transmission electron microscope measurements showed average sizes of 23 � 2 and 30 � 2 nm for ?-Fe2O3 (A) and ?-Fe2O3 (N) formed NPs, respectively. The observed uniform spherical shape for the ?-Fe2O3 (A) formed NPs is due to the presence of carboxylic acid (acetic acid) used to control the nucleation and growth process of ?-Fe2O3 NPs. However, quasi-spherical particle shapes for ?-Fe2O3 (N) were produced in the presence of a mineral acid (nitric acid), which caused the particles to be constrained during their growth step. However, the optical analysis showed that the band gaps of ?-Fe2O3 (A) and ?-Fe2O3 (N) as 2.63 and 2.60 eV were found, respectively. The surface area results exhibited that both ?-Fe2O3 NPs were a porous material with a higher area for ?-Fe2O3 (A), which resulted from the uniform shape and smaller size of particles. The magnetic properties were observed to be slightly different for both ?-Fe2O3 NPs, which were also attributed to the different particle size of the NPs. Higher photocatalytic activity for congo red dye and 4-chlorophenol degradation under sunlight was achieved by ?-Fe2O3 (A), which was attributed to the smaller size and higher surface area compared to ?-Fe2O3 (N) NPs. Graphical Abstract: [Figure not available: see fulltext.]
Languageen
PublisherSpringer New York LLC
SubjectNanoparticles
Photocatalytic activity
Sol�gel
Sunlight
?-Fe2O3
TypeArticle
Pagination880-893
Issue Number3
Volume Number81
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record