Synthesis of polyaniline/lanthanum niobate nanocomposites by in situ polymerization for the detection of dopamine and uric acid

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-09-06 DOI:10.1016/j.materresbull.2024.113083

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Abstract

A novel 2D layered nanocomposite was synthesized by in situ polymerization by incorporating aniline into the HLaNb₂O₇ host matrix. This innovative nanocomposite uniquely combines the electroactive properties of polyaniline with the structural stability and ion-exchange capabilities of lanthanum niobate, resulting in a material with superior electrochemical performance. Characterization of the composites was performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. Electrochemical assays revealed that the PANI/LaNb₂O₇ nanocomposite modified glassy carbon electrode could concurrently detect dopamine and uric acid, respectively. The detection limits were determined to be 0.04 μM for DA and 0.61 μM for UA. The enhanced sensitivity, selectivity, and stability of this nanocomposite make it a promising candidate for advanced electrochemical sensors, particularly in biomedical applications where precise detection of biomolecules is crucial.

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利用原位聚合法合成用于检测多巴胺和尿酸的聚苯胺/铌酸镧纳米复合材料

通过原位聚合，在 HLaNb2O7 主基质中加入苯胺，合成了一种新型二维层状纳米复合材料。这种创新型纳米复合材料将聚苯胺的电活性特性与铌酸镧的结构稳定性和离子交换能力独特地结合在一起，形成了一种具有优异电化学性能的材料。利用 X 射线衍射、扫描电子显微镜、透射电子显微镜、能量色散光谱、X 射线光电子能谱和傅立叶变换红外光谱对复合材料进行了表征。电化学分析表明，PANI/LaNb2O7 纳米复合材料修饰的玻璃碳电极可同时检测多巴胺和尿酸。DA 的检测限为 0.04 μM，UA 的检测限为 0.61 μM。这种纳米复合材料具有更高的灵敏度、选择性和稳定性，因此有望成为先进电化学传感器的候选材料，尤其是在对生物分子的精确检测至关重要的生物医学应用领域。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.