Leaf-templated synthesis of 3D hierarchical porous cobalt oxide nanostructure as direct electrochemical biosensing interface with enhanced electrocatalysis
Leaf-templated synthesis of 3D hierarchical porous cobalt oxide nanostructure as direct electrochemical biosensing interface with enhanced electrocatalysis
复制标题
叶模板合成 3D 分层多孔氧化钴纳米结构作为增强电催化的直接电化学生物传感界面
DOI：
10.1016/j.bios.2014.07.031
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发表时间：
2015-01-15
影响因子：
12.6
通讯作者：
Liu, Aihua
中科院分区：
文献类型：
--
作者：
Han, Lei;Yang, Da-Peng;Liu, Aihua
通过一种简单、经济、环境友好的叶片模板法首次合成了一种新型的三维（3D）分级多孔钴氧化物（Co 3 O 4）结构。Co 3 O 4纳米粒子（30-100 nm）具有不规则的形状，相互连接形成三维多层多孔网络结构，具有高的比表面积和大量的电催化活性中心。随后，Co 3 O 4被成功地用作H2 O2和葡萄糖的非酶检测的直接电化学传感接口。在+0.31 V时，传感器的电流响应与H_2O_2浓度在0.4-200 μ M范围内呈线性关系，检测下限为0.24 μ M（S/N=3），灵敏度为389.7 μ A·mM ~（-1）·cm ~（-2）。在+0.59 V下，发现葡萄糖的两个线性范围为1-300 μ M（LOD为0.1 μ M，灵敏度为471.5 μ A mM（-1）cm（-2））和4-12.5 mM。此外，所制备的传感器显示出优异的稳定性和抗干扰性能的可能的干扰物，如抗坏血酸，尿酸，多巴胺，对乙酰氨基酚，特别是0.15 M的氯离子。类似地，其他各种金属氧化物纳米结构也可以使用这种类似的策略制备，用于催化、电化学传感器和燃料电池中的可能应用。(C)2014爱思唯尔有限公司版权所有。
A novel three-dimensional (3D) hierarchical porous cobalt oxide (Co3O4) architecture was first synthesized through a simple, cost-effective and environmentally friendly leaf-templated strategy. The Co3O4 nanoparticles (30-100 nm) with irregular shapes were interconnected with each other to form a 3D multilayer porous network structure, which provided high specific surface area and numerous electrocatalytic active sites. Subsequently, Co3O4 was successfully utilized as direct electrochemical sensing interface for non-enzymatic detection of H2O2 and glucose. By using chronoamperometry, the current response of the sensor at +0.31 V was linear with H2O2 concentration within 0.4-200 mu M with a low limit of detection (LOD) of 0.24 mu M (S/N=3) and a high sensitivity of 389.7 mu A mM(-1) cm(-2). Two linear ranges of 1-300 mu M (with LOD of 0.1 mu M and sensitivity of 471.5 mu A mM(-1) cm(-2)) and 4-12.5 mM were found at +0.59 V for glucose. In addition, the as-prepared sensor showed excellent stability and anti-interference performance for possible interferents such as ascorbic acid, uric acid, dopamine, acetaminophen and especially 0.15 M chloride ions. Similarly, other various metal oxide nanostructures may be also prepared using this similar strategy for possible applications in catalysis, electrochemical sensors, and fuel cells. (C) 2014 Elsevier B.V. All rights reserved.