Nehru Raja, Chen Shen-Ming
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology Taipei 10608 Taiwan
RSC Adv. 2018 Aug 3;8(49):27775-27785. doi: 10.1039/c8ra05034a. eCollection 2018 Aug 2.
In this study, a layered olivine-type LiMnPO/functionalized-multiwall carbon nanotube (f-MWCNTs) composite is used as an electrochemically active material for the real-time detection of dopamine. A wet-chemical ultrasonication process is used to combine LiMnPO with f-MWCNTs at room temperature. The composite was subjected to various structural, morphological and electrochemical studies. The blending of olivine-type LiMnPO into the f-MWCNTs is revealed by TEM analysis. The electrochemical activities of the LiMnPO/f-MWCNTs composite are systematically investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) for the real-time detection of dopamine. Furthermore, the applicability of the as prepared LiMnPO/f-MWCNTs composite was extended for the detection of human serum (E48) and rat brain-serum (C7) samples with satisfactory recoveries for the real-time applications. All these studies revealed that the layered olivine-type LiMnPO/f-MWCNTs composite is a potential candidate in the field of electrochemical sensing.
在本研究中，层状橄榄石型LiMnPO/功能化多壁碳纳米管（f-MWCNTs）复合材料被用作实时检测多巴胺的电化学活性材料。采用湿化学超声处理工艺在室温下将LiMnPO与f-MWCNTs结合。对该复合材料进行了各种结构、形态和电化学研究。通过透射电子显微镜（TEM）分析揭示了橄榄石型LiMnPO与f-MWCNTs的混合情况。利用循环伏安法（CV）和差分脉冲伏安法（DPV）对LiMnPO/f-MWCNTs复合材料的电化学活性进行了系统研究，以实时检测多巴胺。此外，所制备的LiMnPO/f-MWCNTs复合材料的适用性扩展到了人血清（E48）和大鼠脑血清（C7）样品的检测，在实时应用中回收率令人满意。所有这些研究表明，层状橄榄石型LiMnPO/f-MWCNTs复合材料是电化学传感领域的一个潜在候选材料。
