Nickel/Copper nanoparticles modified TiO2 nanotubes for non-enzymatic glucose biosensors
Nickel/Copper nanoparticles modified TiO2 nanotubes for non-enzymatic glucose biosensors
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DOI：
10.1016/j.snb.2013.02.035
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发表时间：
2013-05-01
影响因子：
8.4
通讯作者：
Zhang, Yunhuai
中科院分区：
文献类型：
--
作者：
Li, Xiaoling;Yao, Jianyu;Zhang, Yunhuai
采用电位阶跃法成功制备了Ni-Cu纳米粒子均匀修饰的高度有序TiO 2纳米管阵列。采用场发射扫描电镜（FESEM）、X射线衍射仪（XRD）和能谱仪（EDS）对合金的形貌、结构和成分进行了表征。将制备的Ni-Cu/TiO 2 NTs电极用于碱性电解液中的非酶葡萄糖检测，与Ni/TiO 2 NTs和Cu/TiO 2 NTs电极相比，Ni-Cu/TiO 2 NTs电极表现出更好的电催化活性。对影响电极电催化性能的因素进行了考察和优化。在0.6V（vs. Ag/AgCl）下，该电极具有高灵敏度（1590.9 μ A·mM ~（-1）cm ~（-2））、低检测限（5 μ M）和宽线性范围（10 μ M ~ 3.2mM）（R ~（-2）= 0.993）。抗坏血酸、尿酸等可氧化物对葡萄糖测定无明显干扰。实验结果表明，所制备的Ni-Cu/TiO 2 NTs电极具有很好的重现性和稳定性。(C)2013爱思唯尔有限公司版权所有。
Highly ordered TiO2 nanotube arrays (TiO2NTs) evenly modified by Ni-Cu nanoparticles were successfully prepared by potential step method. Their morphologies, structures, and alloy composition were characterized by FESEM, XRD and EDS, respectively. The as-prepared Ni-Cu/TiO2NTs electrodes were employed for non-enzymatic glucose detection in alkaline electrolyte and showed better electro-catalytic activity compared with Ni/TiO2NTs and Cu/TiO2NTs electrodes. Factors that affected the electrocatalysis of the electrodes were examined and optimized. Consequently, a sensitive amperometric electrode of glucose was achieved under 0.6V vs. Ag/AgCl with a high sensitivity (1590.9 mu A mM(-1) cm(-2)), low detection limit (5 mu M) and wide linear range from 10 mu M to 3.2 mM (R-2 = 0.993). Furthermore, the oxidable species such as ascorbic acid and uric acid showed no significant interference in determination of glucose. The experiment results revealed a very good reproducibility and high stability for the proposed Ni-Cu/TiO2NTs electrodes. (C) 2013 Elsevier B.V. All rights reserved.