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<p>A systematic approach was developed for synthesizing a copper quantum dot embedded, silica reinforced, and hierarchically ordered, porous biogenic carbonaceous (HPC) material from pre-activated carbon of the <i>Mimosa pudica</i> plant <i>via</i> sol-gel and alcothermal processes. The substantial functional entities on the partially activated carbon enabled an organized interaction with silica, copper oxide and a polymer template, resulting in a Cu-doped silica reinforced ordered mesoporous carbon material (Cu-SOMC) from the crude plant. The meso-phases (2θ values and h, l, k values 22.08<sup>o</sup> and 9.48<sup>o</sup>), crystalline structure and the oxidation state of Cu in Cu-SOMC are characterized by XRD, XPS analysis and TEM-SAED patterns. SEM, TEM and SEM-EDAX analysis revealed the silica reinforcement, a hierarchically ordered arrangement of carbon layers, uniform distribution of Cu<sub>2</sub>O (3–6&#xa0;nm), pore size distribution (0.106 cm<sup>3</sup>/g) and chemical composition of the synthesized material. The modified Cu-SOMC/GC electrode fabricated from Cu-SOMC exhibited good selectivity and sensitivity against the mammalian metabolic biomarker creatinine (CA). The electrode showed a wide range of concentrations (10–100 µM), a broad scan rate range (10–100 mVs<sup>−1</sup>) and a low detection limit at 2&#xa0;nm <i>via</i> the electrochemical method.</p>

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Development of copper embedded silica reinforced ordered mesoporous carbonaceous material for non-enzymatic biomarker sensor

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Sakthivel Elamaran Chandru,
  • Riya Das,
  • Lakshi Saikia,
  • Paneerselvam Yuvaraj,
  • G. Gnana Kumar,
  • Kodirajan Selvakumar

摘要

A systematic approach was developed for synthesizing a copper quantum dot embedded, silica reinforced, and hierarchically ordered, porous biogenic carbonaceous (HPC) material from pre-activated carbon of the Mimosa pudica plant via sol-gel and alcothermal processes. The substantial functional entities on the partially activated carbon enabled an organized interaction with silica, copper oxide and a polymer template, resulting in a Cu-doped silica reinforced ordered mesoporous carbon material (Cu-SOMC) from the crude plant. The meso-phases (2θ values and h, l, k values 22.08o and 9.48o), crystalline structure and the oxidation state of Cu in Cu-SOMC are characterized by XRD, XPS analysis and TEM-SAED patterns. SEM, TEM and SEM-EDAX analysis revealed the silica reinforcement, a hierarchically ordered arrangement of carbon layers, uniform distribution of Cu2O (3–6 nm), pore size distribution (0.106 cm3/g) and chemical composition of the synthesized material. The modified Cu-SOMC/GC electrode fabricated from Cu-SOMC exhibited good selectivity and sensitivity against the mammalian metabolic biomarker creatinine (CA). The electrode showed a wide range of concentrations (10–100 µM), a broad scan rate range (10–100 mVs−1) and a low detection limit at 2 nm via the electrochemical method.