Electrospun polyvinyl alcohol/chitosan nanofibers modified with carbon nanotubes and sliver particles for electrochemical sensor application

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2025-01-01 Epub Date: 2024-11-23 DOI:10.1016/j.reactfunctpolym.2024.106110

Jing Chen , Fei Rong , Yibing Xie

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Abstract

Polyvinyl alcohol (PVA)/chitosan (CS) nanofibers modified with carbon nanotubes (CNT) and silver (Ag) particles are electrospun onto a graphite plate (GP) substrate to form the PVA-CS-CNT-Ag/GP electrode for electrochemical sensor application. Microstructure characterization demonstrates that PVA-CS nanofibers exhibit a loose and porous network structure, significantly improving the effective reaction surface area. Electrochemical measurements show the PVA-CS-CNT-Ag/GP electrode exhibits the limit of detection of 23.2 μM, the linear range of 65–176,460 μM and the sensitivity of 3.3945 μA cm⁻² mM⁻¹. Anti-interference test results show that the sensor has high selectivity towards H₂O₂. Stability test results indicate that the sensor exhibits good stability, as evidenced by the response current of 83.94 % after a period of 30 days. Simulation calculations indicate that PVA-CS-CNT-Ag exhibits lower interfacial energy (−2.3293 eV) compared to PVA-CS-CNT (−0.3674 eV) and PVA-CS-Ag (−0.7646 eV), smaller band gap (0.318 eV) compared to PVA-CS (3.640 eV), higher density of states at Fermi level (14.7332 electrons/eV) than others. Experimental measurements and simulation calculations indicate that PVA-CS-CNT-Ag electrospun nanofibers exhibit promising potential as an electroactive material for the electrochemical detection of H₂O₂.

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以碳纳米管和银粒子改性的静电纺聚乙烯醇/壳聚糖纳米纤维用于电化学传感器

将碳纳米管（CNT）和银（Ag）粒子修饰的聚乙烯醇(PVA)/壳聚糖（CS）纳米纤维静电纺丝到石墨板（GP）衬底上，形成用于电化学传感器的PVA-CS-CNT-Ag/GP电极。微观结构表征表明，PVA-CS纳米纤维具有疏松多孔的网状结构，显著提高了有效反应表面积。电化学测试结果表明，PVA-CS-CNT-Ag/GP电极的检出限为23.2 μM，线性范围为65 ~ 176,460 μM，灵敏度为3.3945 μA cm−2 mM−1。抗干扰测试结果表明，该传感器对H2O2具有较高的选择性。稳定性测试结果表明，传感器具有良好的稳定性，30 d后的响应电流为83.94%。模拟计算表明，与PVA-CS- cnt （- 0.3674 eV）和PVA-CS- ag （- 0.7646 eV）相比，PVA-CS- ag具有更低的界面能（- 2.3293 eV），带隙（0.318 eV）比PVA-CS （3.640 eV）更小，费米能级态密度（14.7332电子/eV）更高。实验测量和模拟计算表明，PVA-CS-CNT-Ag静电纺纳米纤维作为电化学检测H2O2的电活性材料具有良好的潜力。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.