Enhanced photoelectrochemical biosensing performance from rutile nanorod/anatase nanowire junction array
Enhanced photoelectrochemical biosensing performance from rutile nanorod/anatase nanowire junction array
复制标题
金红石纳米棒/锐钛矿纳米线结阵列增强光电化学生物传感性能
DOI：
10.1016/j.apsusc.2018.07.088
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发表时间：
2018
影响因子：
6.7
通讯作者：
Wu Qiang
中科院分区：
文献类型：
--
作者：
Yan Bingdong;Zhuang Yi;Jiang Yulin;Xu Wei;Chen Yongjun;Tu Jinchun;Wang Xiaohong;Wu Qiang
本工作成功制备了一种基于锐钛矿纳米线和金红石纳米棒组成的金红石/锐钛矿TiO2（R/A-TiO2）异质结构的新型酶促葡萄糖光电化学生物传感器。与金红石纳米棒电极相比，在光电化学测试中，R/A-TiO2电极上观察到明显增强的光电流。由于以下几点而获得了优异的光电化学性能：较大表面积的更高光吸收率、与特定R/A-TiO2异质结构相关的光生载流子更好的分离以及独特的导电结构带来的更快的电传输。通过在R/A-TiO2电极上负载葡萄糖氧化酶，将该R/A-TiO2异质结构阵列应用于葡萄糖检测。在葡萄糖检测中获得了5.71μAmM−1cm−2灵敏度、1-20mM线性范围和0.019mM葡萄糖检测限（S/N=3）的卓越性能。
In this work, a novel enzymatic glucose photoelectrochemical biosensor was successfully fabricated based on rutile/anatase TiO2(R/A-TiO2) heterostructure which was composed of anatase nanowires and rutile nanorods. Compared to a rutile nanorod electrode, an obvious enhanced photocurrent was observed on R/A-TiO2electrode in photoelectrochemical test. Excellent photoeletrochemical performance was obtained due to these follow points: higher optical absorptivity for the larger surface area, better separation of the photogenerated carriers related to the specific R/A-TiO2heterostructure and faster electrical transmission stemmed from the unique conductive structure. This R/A-TiO2heterostructure array was applied to glucose detection by loading glucose oxidase on R/A-TiO2electrode. A remarkable performance with a 5.71 μA mM−1cm−2sensitivity, 1–20 mM linear range and a 0.019 mM glucose detection limit (S/N = 3) were obtained in the glucose detection.