TiO2/CdS nanorod array-based photoelectrochemical sensing of Cu2+ in human serum samples,Analytical Methods

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TiO2/CdS nanorod array-based photoelectrochemical sensing of Cu2+ in human serum samples
Analytical Methods ( IF 2.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1039/c7ay02625k
Kejun Feng _{1,

2,

3} , Minghui Yang _{3,

4,

5,

6} , Fang Xie _{1,

2,

3} , Guiqiang Diao _{1,

2,

3} , Mingming Ou _{1,

2,

3} , Huanfeng Huang _{1,

2,

3}

Affiliation

In this study, we report a sensitive and selective photoelectrochemical sensor for the detection of Cu²⁺ in human serum samples based on a TiO₂/CdS nanorod array. To prepare the sensor, a TiO₂ nanorod array was initially deposited onto a fluorine-doped tin oxide (FTO) conductive glass, and then, CdS nanoparticles were deposited onto the TiO₂ nanorod array surface. The well-matched energy level between TiO₂ nanorod and CdS efficiently suppressed the recombination of photogenerated electron and hole (e⁻/h⁺) pairs; this led to improved photon-to-current conversion efficiency. Experimental results demonstrated increased photoelectrochemical current of TiO₂/CdS as compared to that of TiO₂ alone. Utilizing the interaction between Cu²⁺ and CdS, the constructed photoelectrochemical sensing platform shows selective response towards Cu²⁺. Increased Cu²⁺ ion concentration resulted in the decreased photoelectrochemical current intensity, and a linear range of 1 nM to 1 μM was obtained with a detection limit of 0.5 nM. Due to its good performances, the sensor was successfully applied for the direct detection of Cu²⁺ in human serum samples, and the results suggested the potential of this sensor for practical clinical applications.

中文翻译：

基于TiO ₂ / CdS纳米棒阵列的人血清样品中Cu ²⁺的光电化学传感

在这项研究中，我们报告了一种基于TiO ₂ / CdS纳米棒阵列的灵敏且选择性的光电化学传感器，用于检测人血清样品中的Cu ²⁺。为了制备传感器，首先将TiO ₂纳米棒阵列沉积到掺氟的氧化锡（FTO）导电玻璃上，然后将CdS纳米颗粒沉积到TiO ₂纳米棒阵列表面上。的TiO之间的良好匹配的能级₂纳米棒的CdS和有效地抑制光生电子和空穴（e的重组^- / H ⁺）对; 这提高了光子到电流的转换效率。实验结果表明TiO的光电化学电流增加与单独的TiO₂相比，为₂ / CdS。利用Cu²⁺和CdS之间的相互作用，构建的光电化学传感平台显示出对Cu^2+的选择性响应。Cu²⁺离子浓度升高导致光电化学电流强度降低，并且获得的线性范围为1 nM至1μM，检测极限为0.5 nM。由于其良好的性能，该传感器已成功应用于人体血清样品中Cu²⁺的直接检测，结果表明该传感器在实际临床应用中具有潜力。

更新日期：2017-11-20

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