Preparation of Z-scheme 3D ZnO/Au/g-C3N4 heterostructures for the photoelectrochemical sensing of glutathione.

DOI码：

10.1039/D3SD00040K

所属单位：

Fuzhou University；Xiamen University；First Affiliated Hospital etc.

发表刊物：

Sensors & Diagnostics (RSC)

刊物所在地：

United Kingdom

关键字：

"photoelectrochemical (PEC) biosensor";"glutathione (GSH)";"Z-scheme heterojunction";"3D ZnO";"Au nanoparticles";"g-C₃N₄"

摘要：

Three-dimensional (3D) ZnO nanostructures were used as the support for gold nanoparticles (AuNPs) and graphite carbon nitride (g-C3N4) to form a Z-scheme heterostructure photoelectrode (3D ZnO/Au/g-C3N4) in this work. The 3D structure of the ZnO nanorods provided a directional channel for fast carrier transport and abundant reaction sites. ZnO and g-C3N4 formed the Z-scheme heterojunction, and the AuNPs sandwiched between ZnO and g-C3N4 acted as the mediators and greatly reinforced vector electron transfer in the Z-scheme heterojunction. Then, the 3D ZnO/Au/g-C3N4 photoelectrode was applied to develop a sensitive photoelectrochemical (PEC) biosensor for reduced glutathione (GSH) detection. GSH can act as a hole scavenger and reduce the recombination of photogenerated electron–hole pairs, which results in an increase in the photocurrent of the system. The enhanced current showed good linearity with GSH concentration in the range of 7–2000 μM, and the system had a limit of detection of 2.3 μM. The proposed biosensor exhibited good selectivity and reproducibility, obtaining satisfactory results in the analysis of the target in human serum.

第一作者：

Weixin Li

通讯作者：

Jian Wang, Zhenyu Lin, Min Zhao

合写作者：

Xinyang Wang, Jiaji Huang, Jiao Yang, Fang Luo, Bin Qiu

论文类型：

Original Research

文献类型：

Journal Article

卷号：

2

期号：

3

页面范围：

699-706

是否译文：

否

发表时间：

2023-03-28