首页|Highly Synergistic Sensor of Graphene Electrode Functionalized with Rutile TiO_2 Microstructures to Detect L-Tryptophan Compound

Highly Synergistic Sensor of Graphene Electrode Functionalized with Rutile TiO_2 Microstructures to Detect L-Tryptophan Compound

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  • NETL
  • NSTL
  • Japan Oil Chemists Soc
Electrochemical processes are an effective method for detecting dangerous food ingredients. The synergistic between the reduction-oxidation (redox) processes inspired several papers and spurred research towards studying the new materials that can further adapt to optimize the rapid detection of chemical compounds. In this study, we report the eco-synthesis using graphene/TiO_2 rutile (G/TiO_2) electrode microstructures easily prepared through the physical method by mixing graphene and TiO_2 powder and its application for sensing L-tryptophan (Trp) compound. The material characterization results show that the graphene surface is smoother than the G/TiO_2 material. Graphene has been detected using X-ray diffraction (XRD) at a value of 2 thetas 26.39° and TiO_2 forms rutile crystals (110). The FTIR spectrum exhibits the functional groups from graphene of -OH, C-H, C=C, C-O, and TiO_2 identified with Ti-O bonds. The electrochemical test against G/TiO_2 electrode microstructures for Trp compound shows that 0.5 g TiO_2 rutile was the best composition functionalized with graphene material under 0.1M K_3[Fe(CN)_6] + 0.1M NaNO_3 electrolyte with a scan rate of 0.1 V/s. Determination of the detection limit was obtained at 0.005 mg/L with a HorRat value of 1.05%. The stability test was carried out for 25 days, and the addition of Pb(NO_3)_2 as an interference compound had a significant effect on the decrease in electrode performance.

grapheneTiO_2tryptophansensorelectrochemical

Dwiprayogo Wibowo、Riski Hul Akma Malik、Faizal Mustapa、Toshiyuki Nakai、Maulidiyah Maulidiyah、Muhammad Nurdin

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Department of Environmental Engineering, Faculty of Engineering, Universitas Muhammadiyah Kendari, Kendari 93237 - Southeast Sulawesi, INDONESIA

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Kendari 93231 - Southeast Sulawesi, INDONESIA

Doctoral student of Agriculture, Department of Water Resources, Universitas Halu Oleo, Kendari 93231 - Southeast Sulawesi, INDONESIA

Kurita Water and Environment Foundation (KWEF), Nakano-ku, Tokyo, JAPAN

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2022

10.5650/jos.ess21416

日本油化学会誌

日本油化学会誌

SCI
ISSN：1345-8957
年,卷(期)：2022.71(5)
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