Abstract：
BACKGROUND: As persistent organic pollutants (POPs), the accumulation of p-acetylaminophenol (PAT) and p-aminophenol (PAP) in water can seriously damage the health of plants and animals, ultimately leading to threats to human health and safety. Electrochemical sensors have the advantages of being fast, inexpensive, and accurate compared to the complex, expensive, and cumbersome conventional analytical methods. In this study, we designed and synthesized composites with two-dimensional/three-dimensional (2D/3D) porous structures to construct an efficient electrochemical platform for the simultaneous detection of PAT and PAP.
RESULTS: In this work, a novel 3D foamy birnessite Na0.55Mn2O4·1.5H2O@C (SMOH@C) was synthesized, which was composited with 2D ordered mesoporous nanosheets (mNPC) to construct electrochemical sensors detecting PAT and PAP simultaneously. The prepared 2D/3D porous structure of mNPC/SMOH@C increased the exposure of active sites due to its large specific surface area. The introduction of a 3D carbon skeleton altered the charge transfer rate of SMOH@C, and the rich pore structure and oxygen-rich vacancies created favorable conditions for the diffusion and adsorption of PAP and PAT, which enabled the sensitive detection of PAT and PAP. The constructed mNPC/SMOH@C electrochemical sensor could simultaneously detect PAT (1 × 10-7 - 1 × 10-4 M) and PAP (5 × 10-8 - 1 × 10-4 M) with detection limits of 20.4 nM and 30.1 nM, respectively. The sensor has good repeatability (RSD <4 %) and reproducibility (RSD <4 %), and satisfactory recoveries (96.7-102.8 %) were obtained in the analysis of natural water samples.
CONCLUSIONS: In this paper, for the first time, we present the synthesis of 3D foam birnessite and its composite with mNPC for the electrochemical simultaneous detection of PAT and PAP. Our proposed strategy for fabricating 2D/3D porous composites lays the foundation for the design and synthesis of other porous materials. In addition, this study provides new ideas for developing efficient and practical electrochemical sensors for detecting pollutants in aquatic environments.
RESULTS: In this work, a novel 3D foamy birnessite Na0.55Mn2O4·1.5H2O@C (SMOH@C) was synthesized, which was composited with 2D ordered mesoporous nanosheets (mNPC) to construct electrochemical sensors detecting PAT and PAP simultaneously. The prepared 2D/3D porous structure of mNPC/SMOH@C increased the exposure of active sites due to its large specific surface area. The introduction of a 3D carbon skeleton altered the charge transfer rate of SMOH@C, and the rich pore structure and oxygen-rich vacancies created favorable conditions for the diffusion and adsorption of PAP and PAT, which enabled the sensitive detection of PAT and PAP. The constructed mNPC/SMOH@C electrochemical sensor could simultaneously detect PAT (1 × 10-7 - 1 × 10-4 M) and PAP (5 × 10-8 - 1 × 10-4 M) with detection limits of 20.4 nM and 30.1 nM, respectively. The sensor has good repeatability (RSD <4 %) and reproducibility (RSD <4 %), and satisfactory recoveries (96.7-102.8 %) were obtained in the analysis of natural water samples.
CONCLUSIONS: In this paper, for the first time, we present the synthesis of 3D foam birnessite and its composite with mNPC for the electrochemical simultaneous detection of PAT and PAP. Our proposed strategy for fabricating 2D/3D porous composites lays the foundation for the design and synthesis of other porous materials. In addition, this study provides new ideas for developing efficient and practical electrochemical sensors for detecting pollutants in aquatic environments.
摘要：
背景：作为持久性有机污染物（POPs），对乙酰氨基苯酚(PAT)和对氨基苯酚(PAP)在水中的积累会严重损害动植物的健康,最终导致对人类健康和安全的威胁。电化学传感器具有速度快的优点,便宜,与复杂的相比，贵,和繁琐的常规分析方法。在这项研究中,我们设计并合成了具有二维/三维（2D/3D）多孔结构的复合材料，以构建同时检测PAT和PAP的高效电化学平台。
结果：在这项工作中，合成了一种新型的3D泡沫山石Na0.55Mn2O4·1.5H2O@C（SMOH@C），将其与二维有序介孔纳米片（mNPC）复合，构建同时检测PAT和PAP的电化学传感器。制备的mNPC/SMOH@C的2D/3D多孔结构由于其大的比表面积而增加了活性位点的暴露。3D碳骨架的引入改变了SMOH@C的电荷转移速率，富孔结构和富氧空位为PAP和PAT的扩散和吸附创造了有利条件，从而实现了对PAT和PAP的灵敏检测。构建的mNPC/SMOH@C电化学传感器可以同时检测PAT（1×10-7-1×10-4M）和PAP（5×10-8-1×10-4M），检出限为20.4nM和30.1nM。分别。该传感器具有良好的重复性(RSD<4%)和再现性(RSD<4%),在天然水样品的分析中获得了令人满意的回收率（96.7-102.8％）。
结论：在本文中，第一次,我们介绍了3D泡沫水生石的合成及其与mNPC的复合材料，用于电化学同时检测PAT和PAP。我们提出的2D/3D多孔复合材料的制造策略为其他多孔材料的设计和合成奠定了基础。此外,本研究为开发高效实用的水环境污染物电化学传感器提供了新的思路。
结果：在这项工作中，合成了一种新型的3D泡沫山石Na0.55Mn2O4·1.5H2O@C（SMOH@C），将其与二维有序介孔纳米片（mNPC）复合，构建同时检测PAT和PAP的电化学传感器。制备的mNPC/SMOH@C的2D/3D多孔结构由于其大的比表面积而增加了活性位点的暴露。3D碳骨架的引入改变了SMOH@C的电荷转移速率，富孔结构和富氧空位为PAP和PAT的扩散和吸附创造了有利条件，从而实现了对PAT和PAP的灵敏检测。构建的mNPC/SMOH@C电化学传感器可以同时检测PAT（1×10-7-1×10-4M）和PAP（5×10-8-1×10-4M），检出限为20.4nM和30.1nM。分别。该传感器具有良好的重复性(RSD<4%)和再现性(RSD<4%),在天然水样品的分析中获得了令人满意的回收率（96.7-102.8％）。
结论：在本文中，第一次,我们介绍了3D泡沫水生石的合成及其与mNPC的复合材料，用于电化学同时检测PAT和PAP。我们提出的2D/3D多孔复合材料的制造策略为其他多孔材料的设计和合成奠定了基础。此外,本研究为开发高效实用的水环境污染物电化学传感器提供了新的思路。
