二硫化钼纳米片负载纳米银复合材料用于多巴胺的选择性检测。
Molybdenum disulfide nanosheet decorated with silver nanoparticles for selective detection of dopamine.
机构信息
Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
University Malaya Centre for Ionic Liquids, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Nanotechnology and Catalysis Research (NanoCat), University Malaya, Kuala Lumpur 50603, Malaysia.
出版信息
Colloids Surf B Biointerfaces. 2019 Apr 1;176:80-86. doi: 10.1016/j.colsurfb.2018.12.058. Epub 2018 Dec 21.
A metal-inorganic composite, comprises of silver-molybdenum disulfide nanosheets (Ag@MoS) was synthesized at low temperature. The Ag@MoS composite was drop-casted onto a glassy carbon electrode (GCE) for a highly selective dopamine (DA) detection in the presence of interfering compounds such as uric acid (UA) and ascorbic acid (AA). The physicochemical analysis of the nanosheets was carried out with X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The as-prepared Ag@MoS-modified GCE displayed excellent electrocatalytic activity toward DA oxidation, with a 0.2 μM detection limit at a signal-to-noise ratio of 3 and an extensive linear detection range from 1 μM to 500 μM (R = 0.9983). The fabricated non-enzymatic electrochemical sensor demonstrated superior selectivity and stability for the detection of DA with the removal of AA and UA interfering compounds.
一种金属-无机复合材料，由银-二硫化钼纳米片（Ag@MoS）组成，在低温下合成。Ag@MoS 复合材料被滴铸到玻碳电极（GCE）上，用于在存在干扰物如尿酸（UA）和抗坏血酸（AA）的情况下对多巴胺（DA）进行高选择性检测。纳米片的物理化学分析采用 X 射线衍射、透射电子显微镜和 X 射线光电子能谱进行。所制备的 Ag@MoS 修饰的 GCE 对 DA 氧化具有优异的电催化活性，在信噪比为 3 时检测限为 0.2 μM，线性检测范围从 1 μM 到 500 μM（R=0.9983）。所制备的非酶电化学传感器在检测 DA 时表现出优异的选择性和稳定性，可去除 AA 和 UA 干扰物。
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