Roles of TiO2 in the highly robust Au nanoparticles-TiO2 modified polyaniline electrode towards non-enzymatic sensing of glucose
Roles of TiO2 in the highly robust Au nanoparticles-TiO2 modified polyaniline electrode towards non-enzymatic sensing of glucose
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DOI：
10.1016/j.talanta.2020.120780
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发表时间：
2020-05-15
期刊：
影响因子：
6.1
通讯作者：
Toshiyoshi, Hiroshi
中科院分区：
文献类型：
--
作者：
Chiu, Wan-Ting;Chang, Tso-Fu Mark;Toshiyoshi, Hiroshi
沿着糖尿病问题的兴起，葡萄糖传感器已经成为医疗保健的必要工具。葡萄糖传感器电极材料的研究已经得到了广泛的开展，据报道，纳米尺寸的金属纳米颗粒和/或氧化物颗粒在非酶葡萄糖传感器中表现出显着的电催化活性。然而，已知金属纳米颗粒或纳米尺寸氧化物的装饰过程是繁琐且耗时的。此外，这些过程通常导致大量的废液排放。因此，在这项研究中，一个Au纳米粒子（NPs）-TiO 2改性聚苯胺（PANI）复合材料的实践对非酶葡萄糖传感器的应用，通过使用一个方便和节省时间的热还原和低废液排放的电沉积技术。结果表明，在碱性溶液中，经优化量的TiO 2纳米粒子修饰的Au NPs对葡萄糖的氧化具有最高的电催化活性。Au NPs-TiO 2/PANI的稳定性上级大多数报道的结果超过70天。灵敏度为379.8 μ A·mM ~（-1）·cm ~（-2），检出限为0.15 μ M。干扰试验也证实了Au NPs-TiO 2/PANI的高选择性。OH-在Au NPs和TiO 2之间的溢出效应是提高催化活性的主要原因。
Along with the rise of diabetes mellitus issue, glucose sensor has become an imperative tool for healthcare. Studies have been widely conducted on electrode materials for glucose sensors; metal nanoparticles and/or oxide particles in its nano-size are reported to exhibit remarkable electrocatalytic activities in the non-enzymatic glucose sensors. However, the decoration processes of metal nanoparticles or nano-sized oxides are known to be tedious and time-consuming. In addition, the processes usually result in great amount of waste solution emission. In this study, therefore, an Au nanoparticles (NPs)-TiO2 modified polyaniline (PANI) composite is practiced towards the applications of non-enzymatic glucose sensors, by using a facile and time-saving thermal reduction and by electrodeposition techniques with low waste solution emission. Au NPs, which is modified with TiO2 nanoparticles in its optimized amount, performs the highest electrocatalytic activity to the oxidation of glucose in alkaline solution. The stability of Au NPs-TiO2/PANI is superior to those of most reported results over 70 days. The sensitivity and detection limit are 379.8 mu A mM(-1) cm(-2) and 0.15 mu M, respectively. High selectivity of Au NPs-TiO2/PANI is also confirmed by the interference test. Spill-over effect of OH- between Au NPs and TiO2, which is the main reason for the improved catalytic activity, is described in this study.