异质结
光电流
检出限
铜
材料科学
同种类的
光电效应
位阻效应
线性范围
金属
半导体
纳米技术
光电子学
化学
立体化学
物理
色谱法
冶金
热力学
作者
Jiadong Chen,Hongyi Li,Dong Shao,Tao Long,Lanying Xu,Junlun Zhu
标识
DOI:10.1016/j.microc.2023.109768
摘要
Due to their outstanding advantages, photoelectrochemical (PEC) sensors have gained significant attention, which can realize the rapid and accurate detection of target. However, the semiconductor as its core component has a strong influence on the analysis and detection performance. Herein, we developed a simple and efficient method to prepare heterojunction for the construction of PEC sensor detecting L-cysteine (L-Cys). The rod-like copper-based metal organic framework was prepared by room temperature synthesis method, which was used to derive rod-like CuO/Cu2O/C heterojunction with excellent photoelectric property. Due to L-Cys interacts with CuO/Cu2O/C heterojunction to form steric hindrance effect through Cu-S bond, which reduces the photocurrent signal and realizes the selective and homogeneous detection of L-Cys. Inspired by this steric strategy, a PEC sensing platform was fabricated by CuO/Cu2O/C heterojunction for the homogeneous detection of L-Cys, showing linear responses in the range of 0.2 μM to 50 μM with the detection limit of 0.12 μM. Our work shed light on the advancement of better PEC sensor and the method of constructing heterojunction.
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