Paper Information

Journal:   JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)   JUNE 2014 , Volume 11 , Number 3; Page(s) 645 To 652.
 
Paper:  α-FE2O3 NANOFLOWERS: SYNTHESIS, CHARACTERIZATION, ELECTROCHEMICAL SENSING AND PHOTOCATALYTIC PROPERTY
 
Author(s):  SURESH R., GIRIBABU K., MANIGANDAN R., VIJAYARAJAN A., PRABU G.R., STEPHEN A., NARAYANAN V.*
 
* DEPARTMENT OF INORGANIC CHEMISTRY, SCHOOL OF CHEMICAL SCIENCES, UNIVERSITY OF MADRAS, GUINDY CAMPUS, CHENNAI, 600-025, INDIA
 
Abstract: 

Nanoflower structured a-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 a-Fe2O3 with good crystalline nature. Field emission-scanning electron microscopy investigation revealed that the ?-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). a-Fe2O3 exhibited enhanced sensing behavior with respect to that of bare GCE. Additionally, the a-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 a-Fe2O3 and UA or RhB dye which enhances both the electrochemical sensing and photocatalytic activity.

 
Keyword(s): FE2O3 , NANOFLOWERS, URIC ACID, ELECTROCHEMICAL SENSOR, RHODAMINE B, PHOTOCATALYST
 
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