Ternary nanocomposites (NCs) containing copper oxide (CuO)/poly(methyl methacrylate)/various carbon‐based nanofillers have been successfully prepared as thin films by an ex situ method as a selective Hg⁺² sensor. The structural, morphological, and electrochemical properties of the NCs were identified by all common characterization tools. The FT‐IR curves of these NCs proved the efficiency of CuO mixed with single‐walled CNTs (CuO/SWCNTs), multi‐walled CNTs (CuO/MWCNTs), or graphene (CuO/G) nanoparticles in the PMMA polymer matrix. The mixed nanofillers significantly improved the properties of the PMMA film. The thermal characteristics of the pure PMMA polymer matrix were highly developed by adding nanofillers in the form of NCs. The maximum composite degradation temperature (CDT_max) values were comparable for all the NCs and were in the range of 345 to 406°C. For fabrication, the CuO‐PMMA‐SWCNT, CuO‐PMMA‐MWCNT, and CuO‐PMMA‐GNCs were coated onto a glassy carbon electrode (GCE) to form a tiny layer with orderly thickness using a conductive 5% Nafion chemical binder. During the electrochemical investigation, it was found that CuO‐PMMA‐SWCNT had the maximum response toward Hg²⁺ ions compared to the other nanofillers in a buffer medium (phosphate type). To calibrate the Hg²⁺ ionic sensor, the data were plotted against Hg²⁺ ion concentration and the proposed sensor showed linearity over a wide range of concentrations (0.1‐0.01 mM), which is called the linear dynamic range (LDR). The analytical parameters, such as sensitivity (1.70 × 102 μAμM^‐1 cm⁻²), detection limit (55.76 ± 2.79 pM), and limit of quantification (185.87 pM) were calculated from the calibration curve. Moreover, it showed good reproducibility, fast response time, good linearity, large LDR, and good stability. The CuO‐PMMA‐SWCNT NC‐modified GCE offers a new route to fabricate novel heavy metal ionic sensors, which might be used in green environment and health development applications.

中文翻译：

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选择性的Hg2 +传感器性能将各种碳纳米填料转化为CuO-PMMA纳米复合材料

含有氧化铜（CuO）/聚甲基丙烯酸甲酯/各种碳基纳米填料的三元纳米复合材料（NCs）已通过非原位方法作为选择性Hg ⁺²传感器成功制备为薄膜。所有常见的表征工具均可鉴定出NC的结构，形态和电化学性质。这些NC的FT-IR曲线证明了在PMMA聚合物基质中，CuO与单壁CNT（CuO / SWCNT），多壁CNT（CuO / MWCNT）或石墨烯（CuO / G）纳米颗粒混合的效率。混合的纳米填料显着改善了PMMA膜的性能。通过以NCs形式添加纳米填料，高度开发了纯PMMA聚合物基体的热特性。最高复合材料降解温度（CDT所有NC的_max）值均相当，且范围为345至406°C。在制造过程中，使用5％的Nafion化学粘结剂将CuO-PMMA-SWCNT，CuO-PMMA-MWCNT和CuO-PMMA-GNC涂覆在玻璃碳电极（GCE）上，形成厚度均匀的微小层。在电化学研究过程中，发现在缓冲介质（磷酸盐类型）中，CuO-PMMA-SWCNT与其他纳米填料相比，对Hg ²⁺离子具有最大的响应。为了校准Hg ²⁺离子传感器，针对Hg ²⁺绘制了数据离子浓度和建议的传感器在很宽的浓度范围（0.1-0.01 mM）内表现出线性关系，这称为线性动态范围（LDR）。根据校准曲线计算出分析参数，例如灵敏度（1.70×102μAμM ^-1 cm ^-2），检测限（55.76±2.79 pM）和定量限（185.87 pM）。此外，它显示出良好的重现性，快速的响应时间，良好的线性，大的LDR和稳定性。CuO-PMMA-SWCNT NC改性的GCE为制造新颖的重金属离子传感器提供了一条新途径，该传感器可用于绿色环境和健康发展应用中。