Gamze BOZKURT

Synthesis and Characterization of α-Fe2O3 Nanoparticles by Microemulsion Method

Bu çalışmada α-Fe2O3 nanopartiküller mikroemülsiyon yöntemi ile sentezlenmiştir. Sentezlenen nanopartiküller X-ışını difraksiyonu (XRD), Termogravimetrik Analiz (TGA), Taramalı Elektron Mikroskobu (SEM), Fourier Dönüşümü Kızılötesi (FTIR) spektrumu ve UV-Görünür Bölge teknikleri ile karakterize edilmiştir. SEM görüntülerine göre, homojen dispersiyonlu α-Fe2O3 nanopartiküllerde plaka benzeri yapı oluşumu gözlenmiştir. Nanopartiküllerin kristalit boyutu, Scherrer denklemi kullanılarak XRD verilerinden hesaplanmıştır. Kristal boyutlarının yaklaşık 13,1 nm olduğu bulunmuştur. UV-Görünür bölge spektrumuna göre, NP’lerin yaklaşık olarak 420 nm dalga boyunda optik absorpsiyon özelliği sergilediği belirlenmiştir. Ek olarak, α-Fe2O3 NP'lerin optik bant aralığı 3,2 eV olarak hesaplanmıştır.

Anahtar Kelimeler:

α-Fe2O3, microemulsion method, nanoparticle

Synthesis and Characterization of α-Fe2O3 Nanoparticles by Microemulsion Method

In this study, α-Fe2O3 nanoparticles (NPs) were synthesized by microemulsion method. Synthesized NPs were characterized by X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Differential Thermal Analysis (DTA), Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR) spectra, and UV-Visible techniques. According to TGA analysis, it has been observed that a complete formation of Fe2O3 at around 400 °C. According to SEM images, plate like structure formation was observed in α-Fe2O3 NPs with homogeneous dispersion. Approximately 13.1 nm particle size was calculated from the XRD data by using the Scherrer equation. Fe-O vibrations in octahedral and tetrahedral regions were obtained in the FTIR spectrum. According to UV-Vis spectrum, it was determined that NPs showed optical absorption feature at wavelength of around 420 nm. In addition, optical band gap of the α-Fe2O3 NPs was calculated 3.2 eV.

Keywords:

α-Fe2O3 microemulsion method, , nanoparticle,

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