Abstract
ThexTiO2-(1−x)α-Fe2O3ceramic nanoparticles system has been obtained by mechanochemical activation forx= 0.1 and 0.5 and for ball milling times ranging from 2 to 12 hours. Structural and morphological characteristics of the anatase-doped hematite system were investigated by X-ray diffraction (XRD), Mössbauer spectroscopy, and transmission electron microscopy (TEM) combined with electron diffraction (ED). In the XRD patterns, we could evidence the dissolution of anatase in hematite, more pronounced forx= 0.1. The Rietveld structure of the XRD patterns yielded the dependence of the particle size and lattice constants on the amountxof Ti substitutions and as function of the ball milling time. Forx= 0.1, we observed line broadening of the Mössbauer resonances and corresponding fit with several subspectra. Forx= 0.5, it can be observed that the central doublet corresponding to superparamagnetic particles becomes more prominent. The ball milling route allowed us to reach nanometric particle dimensions, which would make the materials very promising for catalytic and gas sensing applications.
Highlights
During the past several years considerable research effort has been directed towards the synthesis and investigations of ceramic oxides due to their interesting properties [1,2,3,4]
The aim of the present paper was to obtain mixed oxides and nanometric solid solutions based on TiO2 and α-Fe2O3, such that we could follow the enhancement of the solubility limits of this system [5, 6]
We report for the first time on the successful synthesis of ceramic nanoparticles based on anatase-doped hematite and their characterization using complementary techniques
Summary
During the past several years considerable research effort has been directed towards the synthesis and investigations of ceramic oxides due to their interesting properties [1,2,3,4]. The aim of the present paper was to obtain mixed oxides and nanometric solid solutions based on TiO2 and α-Fe2O3, such that we could follow the enhancement of the solubility limits of this system [5, 6] For this purpose, we synthesized xTiO2-(1 − x)α-Fe2O3 ceramic nanoparticles system (anatase-doped hematite) using the ball milling method and characterized its structural and magnetic properties using XRD, Mossbauer spectroscopy, and TEM-ED. We synthesized xTiO2-(1 − x)α-Fe2O3 ceramic nanoparticles system (anatase-doped hematite) using the ball milling method and characterized its structural and magnetic properties using XRD, Mossbauer spectroscopy, and TEM-ED One success of this route is the occurrence of particles at the nanoscale. Applications of the anatase-doped hematite nanoparticles are expected in gas sensing and catalysis
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
