Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea.
Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea.
J Hazard Mater. 2021 Sep 15;418:126269. doi: 10.1016/j.jhazmat.2021.126269. Epub 2021 Jun 1.
Novel ZnS/Au/f-multi-walled carbon nanotube (MWCNT) nanostructures were produced via a pulsed laser-assisted technique followed by a wet chemical process. ZnS nanospheres were synthesized via pulsed laser ablation of a Zn target in DMSO, which was used as a solvent and sulfur source. Notably, no additional sulfur sources, surfactants, or reducing agents were used during the synthesis. The structure and morphology of the prepared materials were characterized by X-ray diffraction, micro-Raman spectroscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. The fabricated electrochemical sensor based on ZnS/Au/f-MWCNT nanocomposites exhibited rapid and highly selective detection of a toxic pollutant, namely 4-nitrophenol (4-NP). Linear sweep voltammetry analysis revealed that the optimized ZnS/Au10/f-MWCNT3 nanocomposite displayed a wide linear dynamic response (10-150 μM) with high sensitivity (0.8084μAμMcm) and low limit of detection (30 nM). The excellent 4-NP sensing performance of the modified electrode was attributed to the availability of numerous active sites (electrochemical surface area=0.00369μFcm) and an enhanced electron transfer rate. Interference and stability studies were also conducted. A 100-fold excess of competing ions (Na, K, Mg, Cl, NO, 4-AP, AA, and 2-NP) did not interfere with the selective detection of 4-NP. The newly fabricated ZnS/Au10/f-MWCNT3 nanocomposite could be an effective sensor for the selective and sensitive detection of toxic organic nitro compounds.
新型 ZnS/Au/f-多壁碳纳米管 (MWCNT) 纳米结构是通过脉冲激光辅助技术和湿法化学过程制备的。ZnS 纳米球是通过在 DMSO 中脉冲激光烧蚀 Zn 靶合成的，DMSO 用作溶剂和硫源。值得注意的是，在合成过程中没有使用额外的硫源、表面活性剂或还原剂。所制备材料的结构和形态通过 X 射线衍射、微拉曼光谱、X 射线光电子能谱、紫外-可见光谱、场发射扫描电子显微镜和高分辨率透射电子显微镜进行了表征。基于 ZnS/Au/f-MWCNT 纳米复合材料制备的电化学传感器对有毒污染物 4-硝基苯酚 (4-NP) 表现出快速和高度选择性的检测。线性扫描伏安法分析表明，优化的 ZnS/Au10/f-MWCNT3 纳米复合材料具有宽线性动态响应（10-150 μM），高灵敏度（0.8084μAμMcm）和低检测限（30 nM）。修饰电极对 4-NP 的优异传感性能归因于大量活性位点（电化学表面积=0.00369μFcm）和增强的电子转移速率。还进行了干扰和稳定性研究。100 倍过量的竞争离子（Na、K、Mg、Cl、NO、4-AP、AA 和 2-NP）不会干扰 4-NP 的选择性检测。新制备的 ZnS/Au10/f-MWCNT3 纳米复合材料可作为一种有效传感器，用于选择性和灵敏地检测有毒有机硝基化合物。
