Optical and electro-catalytic studies of nanostructured thulium oxide for vitamin C detection

• Published in: Journal of alloys and compounds Vol. 578; pp. 405 - 412
• Main Authors: Singh, Jay, Srivastava, Manish, Roychoudhury, Appan, Lee, Dong Won, Lee, Seung Hee, Malhotra, B.D.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 25.11.2013; Elsevier
• Subjects: Atomic force microscopy; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electro-oxidation; Electrooptical effects; Exact sciences and technology; Fourier transforms; Materials science; Nanopowders; Nanoscale materials and structures: fabrication and characterization; Nanostructure; Optical properties; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Oxides; Photoluminescence; Physics; Rare earth; Scanning electron microscopy; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Thulium; X-ray diffraction; X-ray photoelectron spectroscopy; X-rays; X-ray diffraction; Rare earth; Optical properties; Electro-oxidation; Atomic force microscopy; Fourier transform spectroscopy; Ascorbic acid; Photoluminescence; XRD; Nanostructures; Rare earth compounds; Nanoparticles; Cyclic voltammetry; Template method; Tin oxide; Oxidation; Fourier-transformed infrared spectrometry; Crystal morphology; Crystal structure; Scanning electron microscopy; Bioelectronics; Template reaction; Calibration; Raman spectroscopy; Indium oxide; Heat treatments; Field emission electron microscopy; Ultraviolet radiation; Quantity ratio; Transmission electron microscopy; Hydrothermal synthesis; Electro-optical effects; Electrochemistry; Nanostructured materials; X-ray photoelectron spectra
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.06.026

•Nanostructured thulium oxide has been prepared using the hydrothermal process.•Thulium oxide exhibits excellent electrochemical response towards ascorbic acid.•Thulium oxide is interesting electro-optical material.•Rare earth metal oxide offers potential application biosensing and optoelectronics. In this report, the nanostructured thulium oxide (Tm2O3) has been prepared using the hydrothermal process without using any template and further heat treatment. The crystalline structure and morphology of prepared sample have been determined by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and Fourier transform infrared (FTIR) spectroscopic techniques. The optical properties of prepared sample have been examined by ultra-violet (UV–Vis), photoluminescence (PL), Raman and X-ray photoelectron spectroscopy (XPS) studies. Furthermore, Tm2O3 nanoparticles have been electrophoretically deposited (EPD) onto indium–tin–oxide (ITO) glass substrate and utilized for electro-oxidation of ascorbic acid (AA). The electro-catalytic behavior of Tm2O3/ITO and bare ITO electrodes for AA electro-oxidation has been studied by cyclic voltammetry. Catalytic oxidation peak current shows a linear dependence on the AA concentration and a linear calibration curve is obtained in the concentration range of 0.2–8mM of AA. The obtained results indicate that the nanostructured Tm2O3 based electrode offers an efficient strategy and a new promising platform for application of the rare earth metal oxide material in electrochemistry and bioelectronics.