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<p>The advancement of nanomaterials with improved peroxidase (POD)-like activity via rationally designed is of great significance in both biological and artificial catalysis fields. In this work, MXene–NH<sub>2</sub> (Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>-NH<sub>2</sub>) was synthesized by etching and delamination of MAX phase (Ti<sub>3</sub>AlC<sub>2</sub>) using LiF/HCl (form in situ HF) and followed by amination under the hydrothermal approach. Then, the MXene–NH<sub>2</sub>–AgNWs were obtained through the chemical interaction between amine moieties (–NH<sub>2</sub>) on the MXene surface and silver nanowires (AgNWs). Compared to the natural enzyme (horseradish peroxidase), the MXene–NH<sub>2</sub>–AgNWs nanocomposite exhibited improved peroxidase-like catalytic activity toward 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation. The observed result can be attributed to the MXene–NH<sub>2</sub>–AgNWs nanocomposite, which enhanced the affinity for H<sub>2</sub>O<sub>2</sub> and the TMB, suggesting its promising potential alternative for peroxidase mimics studies. The remarkable peroxidase-like activity of MXene–NH<sub>2</sub>–AgNWs is attained due to being closely accompanied by the distinctive-layered structure of MXene and the synergistic effects between the AgNWs and MXene–NH<sub>2</sub> structure which enhances reaction kinetics. As a result, we expect that further research into the application of the synthesized catalyst might bring prospective benefits mimicking enzyme catalysis.</p>

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Evaluation of peroxidase mimicking activity of ultrathin silver nanowire-intercalated 2D-Ti3C2 MXene hybrid

  • 期刊论文

  • 发表日期：

    2025年7月7日

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  • Mallappa Mahanthappa,
  • Pattan-Siddappa Ganesh,
  • Hyun-U. Ko,
  • Mani Duari,
  • Sang-Youn Kim

摘要

The advancement of nanomaterials with improved peroxidase (POD)-like activity via rationally designed is of great significance in both biological and artificial catalysis fields. In this work, MXene–NH2 (Ti3C2Tx-NH2) was synthesized by etching and delamination of MAX phase (Ti3AlC2) using LiF/HCl (form in situ HF) and followed by amination under the hydrothermal approach. Then, the MXene–NH2–AgNWs were obtained through the chemical interaction between amine moieties (–NH2) on the MXene surface and silver nanowires (AgNWs). Compared to the natural enzyme (horseradish peroxidase), the MXene–NH2–AgNWs nanocomposite exhibited improved peroxidase-like catalytic activity toward 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation. The observed result can be attributed to the MXene–NH2–AgNWs nanocomposite, which enhanced the affinity for H2O2 and the TMB, suggesting its promising potential alternative for peroxidase mimics studies. The remarkable peroxidase-like activity of MXene–NH2–AgNWs is attained due to being closely accompanied by the distinctive-layered structure of MXene and the synergistic effects between the AgNWs and MXene–NH2 structure which enhances reaction kinetics. As a result, we expect that further research into the application of the synthesized catalyst might bring prospective benefits mimicking enzyme catalysis.