Enhanced photocatalytic and electrochemical properties of Au nanoparticles supported TiO2 microspheres

Muhammad Hussain, Mashkoor Ahmad, Amjad Nisar, Hongyu Sun, Shafqat Karim, Maaz Khan, Sabih D. Khan, Munawar Iqbal, Syed Zahid Hussain

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Au/TiO2 composites were synthesized by a two-step hydrothermal approach and their photocatalytic and electrochemical properties were investigated. It is found that Au/TiO2 composites with a large specific surface area, stability and catalytic activity of Au nanoparticles (NPs) demonstrate enhanced photocatalytic activity compared to pure TiO2 microspheres. Furthermore, the electrochemical properties of the Au/TiO2 composite electrode demonstrate its ability to electrocatalyze the oxidation of hydrogen peroxide and substantially increase the response current. In addition, this modified electrode also exhibits a very rapid and sensitive response towards glucose detection at the low operating potential. The modified electrode shows a linear response from 1.0 to 15 mM with a reproducible sensitivity of 1350 μA mM-1 cm-2 within a response time of less than 6 s. The photocatalytic and electrochemical activity of Au/TiO2 composites provides a new platform for environmental remediation and biomedical applications. All these results reveal that Au/TiO2 composites exhibit great prospects for developing efficient non-enzymatic biosensors. © 2014 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Original languageEnglish
JournalNew Journal of Chemistry
Volume38
Issue number4
Pages (from-to)1424-1432
Number of pages9
ISSN1144-0546
DOIs
Publication statusPublished - 2014
Externally publishedYes

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