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<p>This work presents a novel hybrid nanocomposite strategy integrating inorganic TiO₂–Ag and biopolymeric chitosan–Ag (CHI–Ag) frameworks for the development of efficient humidity sensing materials suitable for pharmaceutical, agricultural, and industrial applications. The engineered nanocomposites exhibit biphasic hybrid architectures in which inorganic and biopolymeric components coexist and interact synergistically, resulting in enhanced surface activity and improved sensing performance. Structural and optical characterization confirmed the successful incorporation of Ag nanoparticles, evidenced by a characteristic surface plasmon resonance peak at 430&#xa0;nm. The TiO₂–Ag nanocomposite displayed an exceptionally high specific surface area of 972.0 m<sup>2</sup>/g with a mesoporous structure in the 4–7&#xa0;nm range, greatly surpassing that of the CHI–Ag counterpart (188.5 m<sup>2</sup>/g). These pronounced differences in textural properties translated directly into sensor performance. The TiO₂–Ag-based humidity sensor demonstrated superior sensitivity (30.4 ΔR/%RH), fast dynamic response, and enhanced signal stability, significantly outperforming the CHI–Ag sensor (7.8 ΔR/%RH). The improved sensing behavior is attributed to the synergistic interaction between TiO₂ and Ag nanoparticles, which promotes efficient moisture adsorption, charge transport, and interfacial conductivity. Overall, this study underscores the functional advantages of inorganic–biopolymer hybrid nanostructures and provides a cost-effective and sustainable pathway for the local fabrication of high-performance humidity sensors adaptable to diverse industrial environments.</p>

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Development and morphostructural evaluation of highly functionalized nanohybridized TiO2-AgNCPs and CHI-AgNCPs sensors for high humidity sensing

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月24日

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  • Olayinka J. Olaniyan,
  • Akinola K. Akinlabi,
  • Kolawole O. Akiode,
  • Gboyega A. Adebayo,
  • Fatai O. Oladoyinbo,
  • Enoch O. Dare

摘要

This work presents a novel hybrid nanocomposite strategy integrating inorganic TiO₂–Ag and biopolymeric chitosan–Ag (CHI–Ag) frameworks for the development of efficient humidity sensing materials suitable for pharmaceutical, agricultural, and industrial applications. The engineered nanocomposites exhibit biphasic hybrid architectures in which inorganic and biopolymeric components coexist and interact synergistically, resulting in enhanced surface activity and improved sensing performance. Structural and optical characterization confirmed the successful incorporation of Ag nanoparticles, evidenced by a characteristic surface plasmon resonance peak at 430 nm. The TiO₂–Ag nanocomposite displayed an exceptionally high specific surface area of 972.0 m2/g with a mesoporous structure in the 4–7 nm range, greatly surpassing that of the CHI–Ag counterpart (188.5 m2/g). These pronounced differences in textural properties translated directly into sensor performance. The TiO₂–Ag-based humidity sensor demonstrated superior sensitivity (30.4 ΔR/%RH), fast dynamic response, and enhanced signal stability, significantly outperforming the CHI–Ag sensor (7.8 ΔR/%RH). The improved sensing behavior is attributed to the synergistic interaction between TiO₂ and Ag nanoparticles, which promotes efficient moisture adsorption, charge transport, and interfacial conductivity. Overall, this study underscores the functional advantages of inorganic–biopolymer hybrid nanostructures and provides a cost-effective and sustainable pathway for the local fabrication of high-performance humidity sensors adaptable to diverse industrial environments.