Tailored construction of one-dimensional TiO2/Au nanofibers: Validation of an analytical assay for detection of diphenylamine in food samples

Thangavelu Kokulnathan; Ramakrishnan Vishnuraj; Shen-Ming Chen; Biji Pullithadathil; Faheem Ahmed; P M Z Hasan; Anwar L Bilgrami; Shalendra Kumar

doi:10.1016/j.foodchem.2022.132052

Tailored construction of one-dimensional TiO₂/Au nanofibers: Validation of an analytical assay for detection of diphenylamine in food samples

Food Chem. 2022 Jun 30:380:132052. doi: 10.1016/j.foodchem.2022.132052. Epub 2022 Jan 5.

Authors

Thangavelu Kokulnathan¹, Ramakrishnan Vishnuraj², Shen-Ming Chen³, Biji Pullithadathil², Faheem Ahmed⁴, P M Z Hasan⁵, Anwar L Bilgrami⁶, Shalendra Kumar⁷

Affiliations

¹ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan; Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan.
² Nanosensor Laboratory, PSG Institute of Advanced Studies, Coimbatore 641 004, India.
³ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan. Electronic address: smchen78@ms15.hinet.net.
⁴ Department of Physics, College of Science, King Faisal University, P.O. Box 400, Hofuf, Al-Ahsa 31982, Saudi Arabia.
⁵ Center of Nanotechnology, King Abdulaziz University, Jeddah, Saudi Arabia.
⁶ Deanship of Scientific Research, King Abdulaziz University, Jeddah, Saudi Arabia.
⁷ Department of Physics, College of Science, King Faisal University, P.O. Box 400, Hofuf, Al-Ahsa 31982, Saudi Arabia; Department of Physics, School of Engineering, University of Petroleum & Energy Studies, Dehradun 248007, India.

PMID: 35105505
DOI: 10.1016/j.foodchem.2022.132052

Abstract

We report a one-dimensional titanium dioxide encapsulated with gold heterojunction nanofibers (TiO₂/Au NFs) as robust electrocatalysts for electrochemical detection of diphenylamine (DPA). A TiO₂/Au NFs were successfully synthesized by a coaxial electrospinning method. The formation of TiO₂/Au NFs was confirmed by various analytical and spectroscopic approaches. The fabricated TiO₂/Au NFs modified screen-printed carbon electrodes (SPCE) exhibit a well-enhanced detection activity towards DPA sensing as compared to other electrodes. Under the experimental conditions, the proposed electrode leading to the sensing range from 0.05 to 60 µM with a detection limit of 0.009 µM was obtained for the DPA detection. Moreover, the TiO₂/Au NFs/SPCE showed good selectivity towards the electrochemical oxidation of DPA. Interestingly, the TiO₂/Au NFs modified electrode was then applied to detect the effect of DPA on spiked content in the food samples.

Keywords: Antioxidant; Environmental hazardous; Metal nanoparticles; Metal oxides; Organic compound.

MeSH terms

Diphenylamine
Electrochemical Techniques
Electrodes
Gold
Metal Nanoparticles*
Nanofibers*
Titanium

Substances

titanium dioxide
Gold
Diphenylamine
Titanium