Kim Eun-Bi, Akhtar M Shaheer, Kong Ing, Ameen Sadia
Advanced Materials and Devices Laboratory, Department of Bio-Convergence Science, Jeonbuk National University, Jeongeup Campus, 56212, Republic of Korea.
New & Renewable Energy Material Development Center (NewREC), Jeonbuk National University, Jeonbuk, Republic of Korea; Graduate School of Integrated Energy-AI, Jeonbuk National University, Jeonju, 54896, Republic of Korea; Department of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonju, 54896, Republic of Korea; Department of Engineering, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3550, Australia.
Chemosphere. 2024 Dec;369:143796. doi: 10.1016/j.chemosphere.2024.143796. Epub 2024 Dec 3.
Globally, the hidden contaminants like microplastics (MPs) combined with other harmful substances have agglomerated in rivers and oceans that pose a threat to human health. Thus, evaluating the toxicity of MPs separately and in combination with other pollutants must be done quickly and precisely. This work reports the synthesis of porous NiMoO nanotubes (NTs) from the transformation of MoO nanorods (NRs) via two steps hydrothermal methods for the effective detection of polyvinyl chloride (PVC) MPs. Transformation of MoO NRs to porous NiMoO NTs was comprehensively deduced by evaluating the crystalline, structural, compositional and morphological properties. The hydrophobic nature of MoO NRs and porous NiMoO NTs was proven experimentally and also by DFT calculations. The electrochemical detection of PVC MPs by NiMoO NTs was investigated by the CV and EIS measurements. Porous NiMoO NTs based electrode expressed the good detection towards PVC MPs with a reasonable sensitivity of ∼1.43 × 10 μA/ppm.cm, a low LOD of ∼18 ppm and R = ∼0.9781. EIS results revealed that porous NiMoO NTs electrode enabled to deliver sensing response at very low concentration of PVC MPs. Due to their easy interaction with hydrophobic PVC MPs, the hydrophobic NiMoO NTs controlled the sensing nature of the material and improved the electrochemical detection at the MP-NiMiO NTs interface.
在全球范围内，像微塑料（MPs）这样的隐藏污染物与其他有害物质一起在河流和海洋中聚集，对人类健康构成威胁。因此，必须快速且精确地评估微塑料单独以及与其他污染物结合时的毒性。这项工作报道了通过两步水热法将MoO纳米棒（NRs）转变为多孔NiMoO纳米管（NTs）以有效检测聚氯乙烯（PVC）微塑料的合成过程。通过评估晶体、结构、成分和形态特性，全面推导了MoO纳米棒向多孔NiMoO纳米管的转变。通过实验以及密度泛函理论（DFT）计算证明了MoO纳米棒和多孔NiMoO纳米管的疏水性。通过循环伏安法（CV）和电化学阻抗谱（EIS）测量研究了NiMoO纳米管对PVC微塑料的电化学检测。基于多孔NiMoO纳米管的电极对PVC微塑料表现出良好的检测性能，灵敏度约为1.43×10 μA/ppm·cm，检测限低至约18 ppm，相关系数R约为0.9781。EIS结果表明，多孔NiMoO纳米管电极能够在极低浓度的PVC微塑料下产生传感响应。由于它们与疏水性PVC微塑料易于相互作用，疏水性NiMoO纳米管控制了材料的传感特性，并改善了在微塑料 - NiMoO纳米管界面处的电化学检测。
