Selective Iron(III) ion uptake using CuO-TiO₂ nanostructure by inductively coupled plasma-optical emission spectrometry

• Main Authors: Rahman Mohammed M, Khan Sher Bahadar, Marwani Hadi M, Asiri Abdullah M, Alamry Khalid A
• Format: Article
• Language: English
• Published: BMC 2012-12-01
• Series: Chemistry Central Journal
• Subjects: CuO-TiO₂ nanosheets; Wet-chemical process; Optical property; Structural property; Adsorption isotherm; Iron(III) ion detection
• Online Access: http://journal.chemistrycentral.com/content/6/1/158

<p>Abstract</p> <p>Background</p> <p>CuO-TiO₂ nanosheets (NSs), a kind of nanomaterials is one of the most attracting class of transition doped semiconductor materials due to its interesting and important optical, electrical, and structural properties and has many technical applications, such as in metal ions detection, photocatalysis, Chemi-sensors, bio-sensors, solar cells and so on. In this paper the synthesis of CuO-TiO₂ nanosheets by the wet-chemically technique is reported.</p> <p>Methods</p> <p>CuO-TiO₂ NSs were prepared by a wet-chemical process using reducing agents in alkaline medium and characterized by UV/vis., FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), and field-emission scanning electron microscopy (FE-SEM) etc.</p> <p>Results</p> <p>The structural and optical evaluation of synthesized NSs were measured by XRD pattern, Fourier transform infrared (FT-IR) and UV–vis spectroscopy, respectively which confirmed that the obtained NSs are well-crystalline CuO-TiO₂ and possessing good optical properties. The morphological analysis of CuO-TiO₂ NSs was executed by FE-SEM, which confirmed that the doped products were sheet-shaped and growth in large quantity. Here, the analytical efficiency of the NSs was applied for a selective adsorption of iron(III) ion prior to detection by inductively coupled plasma-optical emission spectrometry (ICP-OES). The selectivity of NSs towards various metal ions, including Au(III), Cd(II), Co(II), Cr(III), Fe(III), Pd(II), and Zn(II) was analyzed.</p> <p>Conclusions</p> <p>Based on the selectivity study, it was confirmed that the selectivity of doped NSs phase was the most towards Fe(III) ion. The static adsorption capacity for Fe(III) was calculated to be 110.06 mgg⁻¹. Results from adsorption isotherm also verified that the adsorption process was mainly monolayer-adsorption onto a surface containing a finite number of CuO-TiO₂ NSs adsorption sites.</p>