Gold and Platinum Nanoparticle-Functionalized TiO(2) Nanotubes for Photoelectrochemical Glucose Sensing.
Gold and Platinum Nanoparticle-Functionalized TiO(2) Nanotubes for Photoelectrochemical Glucose Sensing.
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用于光电化学葡萄糖传感的金和铂纳米颗粒功能化 TiO2 纳米管
DOI：
10.1021/acsomega.1c06787
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发表时间：
2022-01-18
期刊：
影响因子：
4.1
通讯作者：
Wu Q
中科院分区：
文献类型：
--
作者：
Yang Z;Xu W;Yan B;Wu B;Ma J;Wang X;Qiao B;Tu J;Pei H;Chen D;Wu Q
在这里，具有高灵敏度和低检测极限的稳定的光电化学（PEC）在此处是高度敏感的，稳定的酶PEC生物传感器。轻度方向和载体通过阳极氧化，我们使用了光辅助沉积的方法，将PT纳米颗粒锚定在电位上的Tio2nt上，而Au纳米颗粒中的Au纳米颗粒可以通过表面上的平面效应和分离py ny schotty schotty py tranderiation schotty schotty s schotty schotty schotty，由氧化物（H2O2）产生glucose (Glu) oxidation by glucose oxidase (GOx), accelerating the electron-transfer process during glucose oxidation and greatly improving the sensitivity of the glucose biosensor. As a result, TiO2NTs/Au/Pt/GOx exposed excellent PEC performance, achieving a high sensitivity of 81.93 μA mM–1 cm–2 and a low detection limit (1.39 μM), far exceeding the performance of TiO2NTs/M/GOx (M = Au, Pt). Therefore, the introduction PT纳米颗粒作为促进酶促反应的活性物质，对于设计高性能酶生物传感器很重要。
Developing stable photoelectrochemistry (PEC) glucose biosensors with high sensitivity and a low detection limit is highly desirable in the biosensor field. Herein, a highly sensitive and stable enzymatic glucose PEC biosensor is rationally designed and fabricated using a TiO2NTs/Au/Pt/GOx electrode. First, we prepared one-dimensional TiO2 nanotube arrays which could realize the orthogonalization of the light-incident direction and the carrier diffusion direction via anodization. Subsequently, we used the method of photoassisted deposition for anchoring Pt nanoparticles on TiO2NTs after electrodepositing Au nanoparticles. Among them, Au nanoparticles promote light absorption via the surface plasmon resonance effect and the separation of photogenerated carriers through forming a Schottky junction. Moreover, the Pt nanoparticles on the electrode surface can react with hydrogen peroxide (H2O2) generated from glucose (Glu) oxidation by glucose oxidase (GOx), accelerating the electron-transfer process during glucose oxidation and greatly improving the sensitivity of the glucose biosensor. As a result, TiO2NTs/Au/Pt/GOx exhibited excellent PEC performance, achieving a high sensitivity of 81.93 μA mM–1 cm–2 and a low detection limit (1.39 μM), far exceeding the performance of TiO2NTs/M/GOx (M = Au, Pt). Therefore, the introduction of Pt nanoparticles as active substances to promote enzymatic reactions is important for designing high-performance enzyme biosensors.
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