NDLI: Insight into the Photocatalytical Activity of TiO$_{2}$ Nanoparticles Through the Electrochemical Characterization of Carbon Paste Electrodes

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Insight into the Photocatalytical Activity of TiO$_{2}$ Nanoparticles Through the Electrochemical Characterization of Carbon Paste Electrodes

Content Provider	Springer Nature Link
Author	Soares, Gabriela Byzynski Vaz, Carlos M. P. Ribeiro, Caue Hermans, Ive
Copyright Year	2014
Abstract	We propose a methodology to study the behavior of semiconductor nanoparticles—especially TiO$_{2}$ nanoparticles—in photoactivated processes via electrochemical studies, using solid electrodes instead of thin-film electrodes. This strategy allows the comparison of properties probed from freestanding nanoparticles with the results of electrochemical characterization, without grain growth or texturization effects, frequently observed in thin-film electrodes. In this study, solid electrodes prepared with homogenized carbon paste and TiO$_{2}$ were characterized. The TiO$_{2}$/carbon paste electrode showed lower currents than the carbon paste electrode under UVC illumination. The electrode containing 15 % TiO$_{2}$/carbon paste showed better results for electroanalytical characterization. However, for electrolysis, the carbon paste electrode with 60 % TiO$_{2}$ was used, as 15 to 45 % (w/w) TiO$_{2}$ content was deemed insufficient for this purpose. In order to compare the electrochemical characterization with photocatalytical properties, the degradation of rhodamine B (Rhod-B) dye was used. The reaction order for the Rhod-B degradation was between first and second order, which suggests that the products of the reaction may interfere with the decomposition itself. The results will enhance the establishment of a valuable characterization route to support future research regarding the influence of different materials in photodegradation processes.
Starting Page	92
Ending Page	101
Page Count	10
File Format	PDF
ISSN	18682529
Journal	Electrocatalysis
Volume Number	6
Issue Number	1
e-ISSN	18685994
Language	English
Publisher	Springer US
Publisher Date	2014-08-28
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	TiO$_{2}$ nanoparticles Carbon paste solid electrode Photoelectrocatalysis Electrochemistry Physical Chemistry Catalysis Energy Technology
Content Type	Text
Resource Type	Article
Subject	Electrochemistry

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