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Energy efficient UV-LED source and TiO2nNanotube array-based reactor for photocatalytic application / Thillai Sivakumar Natarajan in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7753-7762 Titre : Energy efficient UV-LED source and TiO2nNanotube array-based reactor for photocatalytic application Type de document : texte imprimé Auteurs : Thillai Sivakumar Natarajan, Auteur ; Kalithasan Natarajan, Auteur ; Hari C. Bajaj, Auteur Année de publication : 2011 Article en page(s) : pp. 7753-7762 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Photocatalysis  Reactor  Titanium  oxide  Ultraviolet  radiation Résumé : The present study focuses on the development and feasibility of ultraviolet light emitting diode (UV-LED) source and TiO2 nanotube array (TNA)-based photocatalytic reactor for Congo red (CR) dye degradation. Highly ordered TNA was synthesized by the anodization method. The synthesized highly ordered TNA was characterized by X- ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscope (AFM), and electronic impedance spectroscopy (EIS) techniques. The percentage degradation was determined using a UV-visible spectrophotometer, while the mineralization of CR dye was further confirmed by chemical oxygen demand (COD) and kinetic analysis. The effect of operational parameters such as initial concentration of dye and pH on the degradation of CR dye has been studied to determine the optimum conditions. A possible degradation mechanism based on the electrospray ionization mass spectrometry (ESI-MS) has been suggested. The results demonstrated that CR dye was completely degraded in 5 h using the designed photocatalytic reactor. The electrical energy per order (EEo) was calculated for estimating the electrical energy efficiency. The result demonstrated that highly adhered nanotube array can effectively be used for photocatalytic degradation of CR dye in the presence of UV-LED light irradiation. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332097 [article] Energy efficient UV-LED source and TiO2nNanotube array-based reactor for photocatalytic application [texte imprimé] / Thillai Sivakumar Natarajan, Auteur ; Kalithasan Natarajan, Auteur ; Hari C. Bajaj, Auteur . - 2011 . - pp. 7753-7762. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7753-7762 Mots-clés : Photocatalysis  Reactor  Titanium  oxide  Ultraviolet  radiation Résumé : The present study focuses on the development and feasibility of ultraviolet light emitting diode (UV-LED) source and TiO2 nanotube array (TNA)-based photocatalytic reactor for Congo red (CR) dye degradation. Highly ordered TNA was synthesized by the anodization method. The synthesized highly ordered TNA was characterized by X- ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscope (AFM), and electronic impedance spectroscopy (EIS) techniques. The percentage degradation was determined using a UV-visible spectrophotometer, while the mineralization of CR dye was further confirmed by chemical oxygen demand (COD) and kinetic analysis. The effect of operational parameters such as initial concentration of dye and pH on the degradation of CR dye has been studied to determine the optimum conditions. A possible degradation mechanism based on the electrospray ionization mass spectrometry (ESI-MS) has been suggested. The results demonstrated that CR dye was completely degraded in 5 h using the designed photocatalytic reactor. The electrical energy per order (EEo) was calculated for estimating the electrical energy efficiency. The result demonstrated that highly adhered nanotube array can effectively be used for photocatalytic degradation of CR dye in the presence of UV-LED light irradiation. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332097

Photocatalytic degradation of methylene blue dye using ultraviolet light emitting diodes / Rajesh J. Tayade in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10262–10267 Titre : Photocatalytic degradation of methylene blue dye using ultraviolet light emitting diodes Type de document : texte imprimé Auteurs : Rajesh J. Tayade, Auteur ; Thillai Sivakumar Natarajan, Auteur ; Hari C. Bajaj, Auteur Année de publication : 2010 Article en page(s) : pp. 10262–10267 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Photocatalytic--Degradation--Methylene--Blue  Dye--Using--Ultraviolet--Emitting  Diodes Résumé : This study was focused on the application of ultraviolet light emitting diodes (UV-LED) as an alternate source for the photocatalytic degradation of methylene blue (MB), which was used as a model compound. A simple reactor arrangement was made to carry out the photocatalytic degradation of methylene blue dye. The photocatalytic activity of P-25 Degussa TiO2 was evaluated using UV-LED reactor. The decomposition of MB dye in aqueous solution by TiO2 photocatalytic process with the UV-LED was found to be technically feasible. The effects of various parameters such as catalyst loading, initial dye concentration, pH, and addition of H2O2 on decolorization and degradation have been investigated to find the optimum conditions. The complete mineralization of MB dye (3.12 × 10−5 M) was confirmed by chemical oxygen demand analysis. Results demonstrated that the UV-LED/TiO2 process can effectively degrade methylene blue dye with optimum conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9012437 [article] Photocatalytic degradation of methylene blue dye using ultraviolet light emitting diodes [texte imprimé] / Rajesh J. Tayade, Auteur ; Thillai Sivakumar Natarajan, Auteur ; Hari C. Bajaj, Auteur . - 2010 . - pp. 10262–10267. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10262–10267 Mots-clés : Photocatalytic--Degradation--Methylene--Blue  Dye--Using--Ultraviolet--Emitting  Diodes Résumé : This study was focused on the application of ultraviolet light emitting diodes (UV-LED) as an alternate source for the photocatalytic degradation of methylene blue (MB), which was used as a model compound. A simple reactor arrangement was made to carry out the photocatalytic degradation of methylene blue dye. The photocatalytic activity of P-25 Degussa TiO2 was evaluated using UV-LED reactor. The decomposition of MB dye in aqueous solution by TiO2 photocatalytic process with the UV-LED was found to be technically feasible. The effects of various parameters such as catalyst loading, initial dye concentration, pH, and addition of H2O2 on decolorization and degradation have been investigated to find the optimum conditions. The complete mineralization of MB dye (3.12 × 10−5 M) was confirmed by chemical oxygen demand analysis. Results demonstrated that the UV-LED/TiO2 process can effectively degrade methylene blue dye with optimum conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9012437