Graphene hybrid nanostructures based screen-printed sensor employed in the glyphosate electrocatalytic determination in the real sample

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2025-05-01 Epub Date: 2024-12-29 DOI:10.1016/j.materresbull.2024.113290

Daniel Y. Tiba, Thiago C. Canevari

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Abstract

This work describes the synthesis characterization and application of innovative CuONPs/GO/CDot(N) nanostructures obtained by direct reaction between graphene oxide, nitrogen-doped carbon quantum dots (CDot(N)), and copper (II) nitrate. The hybrid nanostructures were characterized by spectroscopies methods such as Raman, ultraviolet-visible (UV-Vis), and X-ray photoelectron spectroscopies (XPS), X-ray diffraction (XRD), High-resolution transmission electron microscopy (HR-TEM), and electrochemical techniques. A sensitive electrochemical sensor to determine glyphosate in the real sample has been constructed by a printed carbon electrode modified with CuONPs/GO/CDot(N) nanostructures. Determination of the pesticide glyphosate (glyph) has been performed in phosphate buffer solution (PBS) at pH 5.5 and in real water samples by differential pulse voltammetry technique (DPV). The printed carbon electrode modified with CuONPs/GO/CDot(N) nanostructures presented a detection limit of 1.97 nmol.L⁻¹ (0.3 µg.L⁻¹). The modified, printed carbon electrode determined glyphosate in real samples, with recovery ranging from 95.2 % to 114%. Other pesticides didn't present significant interference in the glyphosate determination.

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基于石墨烯杂化纳米结构的丝网印刷传感器应用于草甘膦电催化测定中

本文描述了氧化石墨烯、氮掺杂碳量子点（CDot(N)）和硝酸铜（II）之间直接反应获得的新型CuONPs/GO/CDot(N)纳米结构的合成、表征和应用。采用拉曼光谱、紫外可见光谱（UV-Vis）、x射线光电子能谱（XPS）、x射线衍射（XRD）、高分辨率透射电子显微镜（HR-TEM）和电化学等光谱方法对混合纳米结构进行了表征。利用CuONPs/GO/CDot(N)纳米结构修饰的印刷碳电极，构建了一种检测真实样品中草甘膦的灵敏电化学传感器。采用差分脉冲伏安法（DPV）在pH为5.5的磷酸盐缓冲溶液（PBS）和实际水样中测定农药草甘膦（glyph）。用CuONPs/GO/CDot(N)纳米结构修饰的印刷碳电极检测限为1.97 nmol。L−1（0.3µg.L−1）该修饰的印刷碳电极测定实际样品中的草甘膦，回收率为95.2% ~ 114%。其他农药对草甘膦测定无明显干扰。

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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.