Abstract
Nanoflower structured α-Fe2O3 was synthesized by adding hexamine to an aqueous solution of ferrous sulphate followed by drying and annealing at 600 °C for 6 h. X-ray diffraction analysis, Fourier-transformed infrared spectroscopy, Raman and DRS UV–visible absorption spectroscopy showed the formation of α-Fe2O3 with good crystalline nature. Field emission-scanning electron microscopy investigation revealed that the α-Fe2O3 has flower-like morphology, which is composed of nanorods. Cyclic voltammetry and chronoamperometry were used to investigate their electrochemical sensing property towards uric acid (UA). α-Fe2O3 exhibited enhanced sensing behavior with respect to that of bare GCE. Additionally, the α-Fe2O3 nanoflowers exhibit better photocatalytic activity of up to 71.7 % against rhodamine B (RhB) in short time of 60 min under visible light irradiation. It is found that the smaller crystallite size and flower-like morphology play a vital role in allowing an interaction between α-Fe2O3 and UA or RhB dye which enhances both the electrochemical sensing and photocatalytic activity.
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Acknowledgments
R.S. acknowledges the CSIR, New Delhi, India, for the financial assistance in the form of Senior Research Fellowship. The authors acknowledge the FE-SEM facility provided by the National Centre for Nanoscience and Nanotechnology, University of Madras.
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Suresh, R., Giribabu, K., Manigandan, R. et al. α-Fe2O3 nanoflowers: synthesis, characterization, electrochemical sensing and photocatalytic property. J IRAN CHEM SOC 11, 645–652 (2014). https://doi.org/10.1007/s13738-013-0335-0
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DOI: https://doi.org/10.1007/s13738-013-0335-0