Electroactive MnO2 nanorods-integrated grafted pectic acid nanocomposite for enzyme-free hydrogen peroxide determination in milk and salami samples

IF 10.4 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2026-12-15 Epub Date: 2026-10-07 DOI:10.1016/j.foodchem.2026.151506

M.S. Hashem, Hend S. Magar

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引用次数: 0

Abstract

Grafting pectic acid (PecA) is fueled by free radical copolymerization of acrylic acid (AcA) and acrylamide (AAm), [PecA-g-poly (AAm-co-AcA)], embedded with manganese dioxide-nanorods (MnO₂-NRs) produced an inventive nanocomposite, [PecA-g-poly (AAm-co-AcA)/MnO₂-NRs]. Fourier-transform infrared (FT-IR) spectroscopic analysis, thermal gravimetric (TG) measurement, scanning and transmission electron microscopes (SEM and TEM) analyses, in addition to X-ray diffraction (XRD), alongside cyclic voltametric (CV) measurements with spectroscopic investigation of electrochemical impedance (EIS), were applied for evaluating PecA-g-poly (AAm-co-AcA)/MnO₂-NRs. Based on the TEM images, MnO₂-NRs have a width size extent from 9 to 33 nm, PecA-g-poly (AAm-co-AcA) has cluster nanoporous framework shapes with a particle size close to 45 nm, and observative nanorods covered the nanoparticles for PecA-g-poly (AAm-co-AcA)/MnO₂-NRs with the polymeric particle's diameters between 21 and 50 nm. The MnO₂-based nanocomposite showed significantly higher electrical capacitance than its grafted copolymer, PecA-g-poly (AAm-co-AcA). Screen-printed carbon electrode (SPCE) modification using PecA-g-poly (AAm-co-AcA)/MnO₂-NRs was examined for its ability to detect hydrogen peroxide (H₂O₂) effectively. Across a range of 0.1 to 1000 μM, it showed remarkable stability, reproducibility, rapid, linear sensitivity, and instantaneous electron transmission. Furthermore, the sensor demonstrated good recovery rates while analysing milk and salami samples. This nanocomposite is thus suitable for detecting hydrogen peroxide as one of reactive oxygen species and its decomposition due to the markedly improved electrical properties.

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电活性二氧化锰纳米棒-集成接枝果酸纳米复合材料用于牛奶和腊肠样品中无酶过氧化氢的测定。

接枝果酸（PecA）是由丙烯酸（AcA）和丙烯酰胺（AAm）的自由基共聚而成的，[PecA-g-poly (AAm-co-AcA)]嵌入二氧化锰纳米棒（MnO2-NRs），产生了一种创新的纳米复合材料[PecA-g-poly (AAm-co-AcA)/MnO2-NRs]。采用傅里叶变换红外（FT-IR）光谱分析、热重（TG）测量、扫描电镜（SEM）和透射电镜（TEM）分析、x射线衍射（XRD）、循环伏安（CV）测量和电化学阻抗（EIS）光谱研究，对PecA-g-poly (AAm-co-AcA)/MnO2-NRs进行了评价。TEM图像显示，MnO2-NRs的宽度范围为9 ~ 33 nm， PecA-g-poly （AAm-co-AcA）具有簇状纳米孔骨架形状，粒径接近45 nm，粒径在21 ~ 50 nm之间的PecA-g-poly (AAm-co-AcA)/MnO2-NRs的观察纳米棒覆盖在纳米颗粒上。mno2基纳米复合材料的电容量明显高于接枝共聚物PecA-g-poly （AAm-co-AcA）。研究了用PecA-g-poly (AAm-co-AcA)/MnO2-NRs修饰的丝网印刷碳电极（SPCE）对过氧化氢（H2O2）的检测能力。在0.1 ~ 1000 μM范围内，它表现出了卓越的稳定性、重现性、快速、线性灵敏度和瞬时电子透射性。此外，该传感器在分析牛奶和腊肠样品时显示出良好的回收率。由于电学性能的显著改善，该纳米复合材料适用于检测作为活性氧之一的过氧化氢及其分解。

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.