Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/11993
Title: Solar photocatalytic detoxification of cyanide with bacterial disinfection by oxide ceramics
Authors: Karunakaran, C
Gomathisankar, P
Manikandan, G
Keywords: Photocatalysis
Semiconductor
Charge-transfer resistance
Capacitance
Bactericidal activity
Issue Date: May-2011
Publisher: NISCAIR-CSIR, India
Abstract: Under natural sunlight (975±25 Wm-2), CeO2 catalyzes the oxidation of cyanide to cyanate in alkaline medium and the photokinetic behaviour of the reaction is similar to those on TiO2 and ZnO surfaces; the oxidation follows the Langmuir-Hinshelwood kinetics on cyanide ion, and depends on the area of the catalyst bed and dissolved oxygen. However, the adsorption of cyanide on the oxides in dark is too small to be measured analytically and detected spectroscopically. Although the photocatalytic efficiencies under identical solar irradiance are of the order: CeO2 < ZnO < TiO2, which is in accordance with the charge-transfer resistance and capacitance of the oxides, CeO2 and ZnO show bactericidal activity as well. At a loading of 0.8 gL-1 they inactivate 40 and 44% of 2.5 × 1012 CFU mL-1 E. coli in 30 min even without direct light.
Description: 169-176
URI: http://hdl.handle.net/123456789/11993
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.18(3) [May 2011]

Files in This Item:
File Description SizeFormat 
IJCT 18(3) 169-176.pdf170.08 kBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.