A Photoelectrochemical Platform Based on Polyaniline-Modified Titanium Dioxide Facet Heterostructure
A Photoelectrochemical Platform Based on Polyaniline-Modified Titanium Dioxide Facet Heterostructure
复制标题
基于聚苯胺改性二氧化钛小平面异质结构的光电化学平台
DOI：
10.1021/acsabm.1c01298
复制
发表时间：
2022
影响因子：
4.7
通讯作者：
Wu Qiang
中科院分区：
文献类型：
--
作者：
Wang Yuanyuan;Yin Li;Wu Jie;Li Nan;He Na;Zhao Haixin;Li Xiaotian;Lai Xiaoyong;Wu Qiang
A photoelectrochemical (PEC) electrode for glucose detection was built based on polyaniline (PANI) modified titanium dioxide heterojunction (FH-TiO2) structures. Ultrathin titanium dioxide (TiO2) nanosheets are assembled onto rutile nanorods (TiO2NRs). 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-TiO2. This electrode showed excellent performance in 0.2–1.0 mM linear range with a sensitivity 15.63 μA mM–1cm–2and 1.0–15.0 mM linear range with a sensitivity of 1.42 μA mM–1cm–2.
