Abstract
The work in this paper was devoted to investigating some nanosized iron oxide pigments prepared by microemulsion technique. The role of concentration of iron salt and surfactant (cetyltrimethylammonium bromide) on the produced iron oxide was studied. The techniques employed to characterize the samples were thermogravimetric analysis, X-ray diffractometry, transmission electron microscope, infrared spectroscopy, and diffuse reflectance spectroscopy. The results revealed that the particle size of the prepared sample using 0.2 M iron sulfate and 3.2 wt% of surfactant was in the range 7–9 nm. Increasing the concentration of either iron salt or the surfactant increased the particle size of the obtained ferric oxide. The diffuse reflectance measurements showed that the charge transfer/electron pair transition absorption peak, which is closely related to the reddish color of the oxide, was shifted to a longer wavelength (blue shift) by decreasing the dimension of the particles. The samples were tested as pigments. They showed different tints of red color and were found to be promising for applications as pigments in the field of paint manufacturing.
Highlights
Nanostructured iron oxides are of a great interest when compared with their bulk counterpart due to their large surface area, high rate of reactivity, and due to the possibility of enhancing environmental friendly reactions
The outstanding dispersion, small particle size distribution, and shape control imparted by the microemulsion synthesis technique make it a very attractive method for synthesis of nanooxides
In this technique, nanosized water droplets are dispersed in a continuous oil medium and stabilized by surfactant molecules accumulated at the oil/water interface
Summary
Nanostructured iron oxides are of a great interest when compared with their bulk counterpart due to their large surface area, high rate of reactivity, and due to the possibility of enhancing environmental friendly reactions. They have superior characters in nontoxicity, chemical stability, durability, and low costs [1]. The outstanding dispersion, small particle size distribution, and shape control imparted by the microemulsion synthesis technique make it a very attractive method for synthesis of nanooxides In this technique, nanosized water droplets are dispersed in a continuous oil medium and stabilized by surfactant molecules accumulated at the oil/water interface. The study was directed to evaluate some of these samples as pigments and to demonstrate the effect of particle size variation on the tinting strength, hiding power, International Journal of Inorganic Chemistry and other physical and chemical properties of the prepared red paints
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
