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<p>A facile solvothermal approach was employed to synthesize novel titanium-based MOF (Ti-MOF) precursors from titanium (IV) butoxide and 2-amino terephthalic acid. The material was amicably characterized by Ti-MOF. The highly porous Ti-MOF was shown to exhibit the monoclinic cubic structure of TiO<sub>2</sub>. The solid was found to be thermally stable below 600&#xa0;°C, with an average particle size and surface roughness of 6.36&#xa0;nm and 8.03&#xa0;nm, respectively. A thin film glassy carbon electrode (GCE) was fabricated using Ti-MOF, demonstrating a two-fold increase in electroactive surface area and fivefold lower charge transfer resistance than the bare GCE. Efficient detection of As(III) was achieved by the Ti-MOF, with a limit of detection of 1.0 × 10<sup>−5</sup>&#xa0;mg&#xa0;L<sup>−1</sup>. The electrode was observed to have fair stability and an extended shelf life. Furthermore, Ti-MOF was selective and effective for As(III) detection in real applications, as demonstrated using a river water sample.</p> Graphical Abstract <p></p>

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Novel titanium-based metal organic framework (MOF) in efficient and ultra-trace electrochemical detection of arsenic (III)

  • 期刊论文

  • 发表日期：

    2025年5月10日

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  • Ricky Lalawmpuia,
  • Melody Lalhruaitluangi,
  • Lalhmunsiama,
  • Suk Soon Choi,
  • Diwakar Tiwari

摘要

A facile solvothermal approach was employed to synthesize novel titanium-based MOF (Ti-MOF) precursors from titanium (IV) butoxide and 2-amino terephthalic acid. The material was amicably characterized by Ti-MOF. The highly porous Ti-MOF was shown to exhibit the monoclinic cubic structure of TiO2. The solid was found to be thermally stable below 600 °C, with an average particle size and surface roughness of 6.36 nm and 8.03 nm, respectively. A thin film glassy carbon electrode (GCE) was fabricated using Ti-MOF, demonstrating a two-fold increase in electroactive surface area and fivefold lower charge transfer resistance than the bare GCE. Efficient detection of As(III) was achieved by the Ti-MOF, with a limit of detection of 1.0 × 10−5 mg L−1. The electrode was observed to have fair stability and an extended shelf life. Furthermore, Ti-MOF was selective and effective for As(III) detection in real applications, as demonstrated using a river water sample.

Graphical Abstract