Sensitive photoelectrochemical sensing of glucose using hematite decorated with NiAl-layered double hydroxides.
Sensitive photoelectrochemical sensing of glucose using hematite decorated with NiAl-layered double hydroxides.
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DOI：
10.1016/j.foodchem.2022.134883
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发表时间：
2022-11
期刊：
影响因子：
8.8
通讯作者：
Ming Fan;Shuai-Kang Zhu;Qinqin Zhang;Xinshou Wang;Ling Zhang;Zhixian Chang;R. Chong
中科院分区：
文献类型：
--
作者：
Ming Fan;Shuai-Kang Zhu;Qinqin Zhang;Xinshou Wang;Ling Zhang;Zhixian Chang;R. Chong
赤铁矿（α-Fe2O3）是一种很有前途的光电化学（PEC）传感器光电极材料。然而，它仍然存在严重的表面电荷重组和缓慢的界面电荷转移动力学。本文采用水热法成功制备了α-Fe2O3修饰的nial层双氢氧化物（NiAl-LDH/α-Fe2O3）。NiAl-LDH/α- fe2o3对葡萄糖具有良好的PEC响应，线性范围为0.01 ~ 2 mM，灵敏度为274.7 μA·mM−1·cm−2，检出限为0.005 mM。NiAl-LDH/α- fe2o3 - PEC传感器可用于面包、烤面包、葡萄糖口溶液等食品样品的葡萄糖检测，与HPLC检测结果相当。PEC和电化学表征表明，NiAl-LDH可以作为和/或提供葡萄糖检测的活性位点，扩大能带弯曲，降低电荷转移电阻，从而显著提高α- fe2o3对葡萄糖的PEC响应。
Hematite (α-Fe2O3) is a promising photoelectrode material for photoelectrochemical (PEC) sensors. However, it still suffers from serious surface charge recombination and slow interfacial charge transfer kinetics. In this work, NiAl-layered double hydroxides decorated on α-Fe2O3(NiAl-LDH/α-Fe2O3) was successfully fabricated via a facile hydrothermal method. The NiAl-LDH/α-Fe2O3exhibits excellent PEC response toward glucose, with a good linear range from 0.01 to 2 mM, a high sensitivity of 274.7 μA·mM−1·cm−2and a low detection limit of 0.005 mM. NiAl-LDH/α-Fe2O3PEC sensor could be used for glucose determination in various food samples, such as bread, toast and glucose oral solution, which achieved comparable results with that of HPLC. PEC and electrochemical characterizations indicate NiAl-LDH could act as and/or provide active sites for glucose detection, enlarge the band bending and decrease the charge transfer resistance, thus significantly improve the PEC response of α-Fe2O3toward glucose.