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首页> 外文期刊>RSC Advances >Synthesis of Ni2+ ion doped ZnO–MWCNTs nanocomposites using an in situ sol–gel method: an ultra sensitive non-enzymatic uric acid sensing electrode material
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Synthesis of Ni2+ ion doped ZnO–MWCNTs nanocomposites using an in situ sol–gel method: an ultra sensitive non-enzymatic uric acid sensing electrode material

机译：使用原位溶胶 - 凝胶法合成Ni2 +离子掺杂的ZnO-MWCNT纳米复合材料：超敏感的非酶促尿酸传感电极材料

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Nickel (Ni ~(2+) ) ion doped zinc oxide-multi-wall carbon nanotubes (NZC) with different composition ratios of MWCNTs (from 0.01 to 0.1 wt%) are synthesized through an in situ sol–gel method. The synthesized NZC nanocomposites (NCs) are used as electrode materials with glassy carbon electrodes (GCEs) for electrochemical detection of uric acid (UA). The cyclic voltammogram of the representative NZC 0.1 modified GCE (NZC 0.1/GCE) revealed the highest electrochemical sensing activity towards the oxidation of UA at 0.37 V in 0.2 M phosphate buffer solution (PBS) having pH 7.4 ± 0.02. The limit of detection (LOD) and limit of quantification (LOQ) for the NZC 0.1/GCE are determined to be 5.72 nM and 19.00 nM (S/N = 3) respectively, which is the lowest compared to the literature values reported for enzymatic and non-enzymatic detection techniques. The synergistic effect of NZC 0.1 NCs is proposed as one of the factors for the enhanced electrochemical oxidation of UA complemented by the phase, lattice parameters, functional groups, morphology, elemental compositions, types of bonding and specific surface area with pore size ascertained using various techniques. The synthesized NZC 0.1 NCs are further proposed as selective electrode materials for the electrochemical detection of UA as authenticated further by performing interference tests with other metabolites such as ascorbic acid (AA), dopamine (DA) and D -glucose. The optimized electrochemical studies are further adopted for sensing of UA from human excretion samples using NZC 0.1 NCs.
机译：通过原位溶胶 - 凝胶法合成镍（Ni〜（2+））离子掺杂的氧化锌 - 多壁碳纳米管（NZC），具有不同组成比的MWCNT（0.01至0.1wt％）。合成的NZC纳米复合材料（NCS）用作具有玻璃碳电极（GCE）的电极材料，用于尿酸（UA）的电化学检测。代表性NZC 0.1改性GCE（NZC 0.1 / GCE）的循环伏安图揭示了在0.2M磷酸盐缓冲溶液（PBS）中的0.37V氧化uA的最高电化学感测活度，其具有pH 7.4±0.02。 NZC 0.1 / GCE的检测极限（LOD）和定量限（LOQ）的限制分别为5.72nm和19.00nm（s / n = 3），与酶促报告的文献值相比是最低的和非酶检测技术。提出了NZC 0.1ncs的协同作用作为通过相位，晶格参数，官能团，形态学，元素组合物，元素组合物，粘合和特异性表面积的增强电化学氧化的因素之一，使用各种孔径技巧。通过对诸如抗坏血酸（AA），多巴胺（DA）和D葡葡糖等其他代谢物进行干涉试验，进一步提出了合成的NZC 0.1NCS作为UA的电化学检测的选择性电极材料，例如通过进行干扰测试。进一步采用优化的电化学研究，用于使用NZC 0.1NCS从人排泄样品中感测UA。

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