Uniform ordered mesoporous ZnCo2O4 nanospheres for super-sensitive enzyme-free H2O2 biosensing and glucose biofuel cell applications  

作　　者：Shiqiang Cui Li Li Yaping Ding Jiangjiang Zhang QingshengWu Zongqian Hu 

机构地区：[1]School of Materials Science and Engineering College of Sciences, Shanghai University, Shanghai 200444, China [2]State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200444, China [3]Beijing Institute of Radiation Medicine, Beijing 100850, China

出　　处：《Nano Research》2017年第7期2482-2494,共13页纳米研究（英文版）

基　　金：Thank the National Natural Science Foundation of China （Nos. 21671132 and 81301345） for the supports. Thank Analysis and Determination Center, Shanghai University for the support.

摘　　要：Uniform, ordered mesoporous ZnCo2O4 （meso-ZnCo2O4） nanospheres were successfully synthesized using a sacrificing template method. The meso-ZnCo2O4 nanospheres were used for the first time for H2O2 biosensing and in glucose biofuel cells （GBFCs） as an enzyme mimic. The meso-ZnCo2O4 nanospheres not only exhibited excellent catalytic performance in the H2O2 sensor, achieving a high sensitivity （658.92 μA.mM-1.cm-2） and low detection limit （0.3 nM at signal-to-noise ratio （S/N） = 3）, but also performed as an excellent cathode material in GBFCs, resulting in an open circuit voltage of 0.83 V, maximum power density of 0.32 mW.cm-2, and limiting current density of 1.32 mA.cm-2. The preeminent catalytic abilities to H2O2 and glucose may be associated with the large specific surface area of the mesoporous structure in addition to the intrinsic catalytic activity of ZnCo2O4. These significant findings provide a successful basis for developing methods for the supersensitive detection of H2O2 and enriching catalytic materials for biofuel cells.Uniform, ordered mesoporous ZnCo2O4 （meso-ZnCo2O4） nanospheres were successfully synthesized using a sacrificing template method. The meso-ZnCo2O4 nanospheres were used for the first time for H2O2 biosensing and in glucose biofuel cells （GBFCs） as an enzyme mimic. The meso-ZnCo2O4 nanospheres not only exhibited excellent catalytic performance in the H2O2 sensor, achieving a high sensitivity （658.92 μA.mM-1.cm-2） and low detection limit （0.3 nM at signal-to-noise ratio （S/N） = 3）, but also performed as an excellent cathode material in GBFCs, resulting in an open circuit voltage of 0.83 V, maximum power density of 0.32 mW.cm-2, and limiting current density of 1.32 mA.cm-2. The preeminent catalytic abilities to H2O2 and glucose may be associated with the large specific surface area of the mesoporous structure in addition to the intrinsic catalytic activity of ZnCo2O4. These significant findings provide a successful basis for developing methods for the supersensitive detection of H2O2 and enriching catalytic materials for biofuel cells.

关 键 词：mesoporous ZnCo2O4 H2O2 biosensing glucose biofuel cells 

分 类 号：TQ127.2[化学工程—无机化工] TP212.3[自动化与计算机技术—检测技术与自动化装置]