异质结
光电流
材料科学
光电子学
检出限
阳极
分析物
肖特基势垒
热液循环
纳米技术
电极
化学
化学工程
物理化学
色谱法
二极管
工程类
作者
Yun Cui,Fan Xu,Fateh Ullah,Minqiang Wang
标识
DOI:10.1007/s00216-021-03870-y
摘要
Photoelectrochemical (PEC) detection as a potential development strategy for Cu2+ ion sensor has arisen extensive attention. Herein, CdS/Ti3C2 heterostructure was synthesized by electrostatically driven assembly and hydrothermal method. On the basis of a CdS/Ti3C2 heterostructure, a novel anodic PEC sensing platform was constructed for highly sensitive detection of trace amount of Cu2+. Carrier transport at the interface of CdS/Ti3C2 heterostructure was tremendously improved, due to the generation of effective Schottky junctions. Under visible light irradiation, the CdS/Ti3C2 heterostructure-modified PEC platform exhibits great anode photocurrent signal, and the formation of CuxS reduces the PEC response with the presence of Cu2+ as a representative analyte. Thus, the linear response of Cu2+ ranges from 0.1 nM to 10 µM and the limits of detection (LOD, 0.05 nM) are obtained, which is lower than that of WHO's Guidelines for Drinking-water Quality (30 μM). This idea of component reconstitution provides a new paradigm for the design of advanced PEC sensors.
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