neither the crystallite size nor the primary particle sizes
indicated any significant changes in sizes. This result is in
contrast with other studies involving changing iron dopant
concentration in SnO2 that have observed a decrease in
particle size as concentrations of iron increases [11, 13,
32, 39]. On the other hand, a similar trend was exhibited
by Liu and coworkers where the increase in dopant concentration
yielded larger crystallite sizes [23]. However, the increase
in size was a result of producing high aspect ratio
Fe-doped SnO2 particles in Liu et al.’s study [23] whereas no
one-dimensional nanoparticles were identified in the current
system.