Wang Yuanyuan, Yin Li, Wu Jie, Li Nan, He Na, Zhao Haixin, Li Xiaotian, Lai Xiaoyong, Wu Qiang
Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130012, P. R. China.
Key Laboratory of Tropical Translational Medicine of Ministry of Education, NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine and The Second Affiliated Hospital, Hainan Medical University, Haikou, Hainan 571199, China.
ACS Appl Bio Mater. 2022 Mar 21;5(3):1297-1304. doi: 10.1021/acsabm.1c01298. Epub 2022 Mar 9.
A photoelectrochemical (PEC) electrode for glucose detection was built based on polyaniline (PANI) modified titanium dioxide heterojunction (FH-TiO) structures. Ultrathin titanium dioxide (TiO) nanosheets are assembled onto rutile nanorods (TiO NRs). Experiments show that the main exposed faces of these nanosheets are (101) or (111) crystal planes. Proven by theoretical calculation, the bottom of the conduction band (CB) of (111) is 0.15 eV lower than the bottom of the conduction band of (101). Therefore, when the material is excited by light, photogenerated electrons are able to transfer from the conduction band of (101) to the conduction band of (111). PANI was introduced as a medium to effectively conduct photogenerated charges between glucose oxidase and titanium dioxide. A photoelectric detection electrode for glucose was fabricated by loading glucose oxidase onto PANI@FH-TiO. This electrode showed excellent performance in 0.2-1.0 mM linear range with a sensitivity 15.63 μA mM cm and 1.0-15.0 mM linear range with a sensitivity of 1.42 μA mM cm.
基于聚苯胺（PANI）修饰的二氧化钛异质结（FH-TiO）结构构建了一种用于葡萄糖检测的光电化学（PEC）电极。超薄二氧化钛（TiO₂）纳米片组装在金红石纳米棒（TiO₂ NRs）上。实验表明，这些纳米片的主要暴露面为（101）或（111）晶面。理论计算证明，（111）的导带（CB）底部比（101）的导带底部低0.15 eV。因此，当材料受到光激发时，光生电子能够从（101）的导带转移到（111）的导带。引入PANI作为介质，以有效地在葡萄糖氧化酶和二氧化钛之间传导光生电荷。通过将葡萄糖氧化酶负载到PANI@FH-TiO₂上制备了一种用于葡萄糖的光电检测电极。该电极在0.2 - 1.0 mM线性范围内表现出优异性能，灵敏度为15.63 μA mM⁻¹ cm⁻²，在1.0 - 15.0 mM线性范围内灵敏度为1.42 μA mM⁻¹ cm⁻²。
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