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Gel-assisted synthesis of anatase TiO2 nanoparticles and application for electrochemical determination of L-tryptophan

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Abstract

Anatase titanium dioxide nanoparticles (TiO2-NPs) were synthesized with and without gelatin via the sol-gel method. The TiO2-NPs were characterized by a number of techniques, such as thermogravimetric analysis (TGA), X-ray diffraction analysis (XRD), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FT-IR) and ultraviolet visible spectroscopy (UV-Vis). The particle sizes of the TiO2-NPs prepared with and without gelatin were ∼13 and ∼17 nm, respectively. The main advantage of using gelatin as a stabilizing agent is that it provides long-term stability for nanoparticles by preventing particles agglomeration. The results indicated that gelatin was a reliable green stabilizer, which can be used as a polymerization agent in the sol-gel method for synthesis of tiny size TiO2-NPs. Moreover, the composite film was prepared by synthesized TiO2-NPs nanoparticles and multi wall carbon nanotube (MWNT) on glassy carbon electrode (TiO2-MWNT/GCE). The TiO2-MWNT/GCE responded linearly to L-tryptophan (L-Trp) in the concentration of 1.0 × 10−6 to 1.5 × 10−4 M with detection limit of 5.2 × 10−7 M at 3 using amperometry. The studied sensor exhibited good reproducibility and long-term stability.

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Authors and Affiliations

  1. Centre for Research in Nanotechnology & Catalysis (NANOCEN), University of Malaya, IPS Building, 50603, Kuala Lumpur, Malaysia

    Samira Bagheri & Sharifah Bee Abd Hamid

  2. Department of Chemistry, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

    Fereshteh Chekin

Authors
  1. Samira Bagheri
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  2. Fereshteh Chekin
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  3. Sharifah Bee Abd Hamid
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Correspondence to Fereshteh Chekin.

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Published in Russian in Elektrokhimiya, 2014, Vol. 50, No. 10, pp. 1053–1059.

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Bagheri, S., Chekin, F. & Hamid, S.B.A. Gel-assisted synthesis of anatase TiO2 nanoparticles and application for electrochemical determination of L-tryptophan. Russ J Electrochem 50, 947–952 (2014). https://doi.org/10.1134/S1023193514100024

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  • DOI: https://doi.org/10.1134/S1023193514100024

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