Fabrication of SnO2/α-Fe2O3, SnO2/α-Fe2O3–PB Heterostructure Thin Films: Enhanced Photodegradation and Peroxide Sensing

Published on Sep 8, 2014in ACS Applied Materials & Interfaces9.229
· DOI :10.1021/AM5030879
Sumanta Jana11
Estimated H-index: 11
 (Indian Institute of Engineering Science and Technology, Shibpur), Anup Mondal34
Estimated H-index: 34
Sources
Abstract
We report the synthesis of SnO2/α-Fe2O3 heterostructure thin films by employing two-step processes: galvanic and chemical deposition. Fe2O3 is a narrow band gap semiconductor and has short hole diffusion length. Therefore, the photogenerated electrons and holes are not easy to separate in Fe2O3. Combining Fe2O3 to SnO2, a wide-energy-gap semiconductor having suitable valence band and conduction band position is a promising candidate for the photo catalysts. The chemical modification of this heterostructure was achieved by electro-active Prussian blue (PB) molecule. The photocatalytic activities of SnO2, α-Fe2O3, SnO2/α-Fe2O3, and SnO2/α-Fe2O3–PB thin films were investigated for organic dye degradation. It was observed that the coupled and combined modified systems showed better reactivity compared to individual single-component materials. The electrocatalytic activity of the synthesized thin films has also been studied where hydrogen peroxide (H2O2) was taken as a model compound. Amperometric study also r...
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References54
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A novel non-enzymatic peroxide sensor has been constructed by using nickel oxide (NiO) thin films as sensing material, which were prepared by a two-step process: (i) electrodeposition of nickel sulfide (NiS) and (ii) thermal air oxidation of as-deposited NiS to NiO. The resultant material is highly porous and comprises interconnected nanofibers. UV-Vis spectroscopy, FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and field-emission scanning electron microscopy ...
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Jul 25, 2014·Journal of Alloys and Compounds5.32
#1Sumanta Jana (Indian Institute of Engineering Science and Technology, Shibpur)H-Index: 11
#2Bibhas Chandra Mitra (Indian Institute of Engineering Science and Technology, Shibpur)H-Index: 8
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Abstract The study demonstrates an approach to synthesize nanostructure SnO 2 thin films on TCO (transparent conducting oxide) coated glass substrates by galvanic technique. Aqueous solution of hydrated stannic chloride (SnCl 4 ⋅5H 2 O) in potassium nitrate (KNO 3 ) solution was used as the working solution. The process involves no sophisticated reactor or toxic chemicals, and proceeds continuously under ambient condition; it provides an economic way of synthesizing nanostructure SnO 2 semicondu...
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Jun 5, 2013·Journal of Alloys and Compounds5.32
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