双金属片
检出限
材料科学
线性范围
纳米技术
催化作用
化学工程
化学
色谱法
有机化学
工程类
作者
Pei Song,Min Wang,Yadong Xue,Ai‐Jun Wang,Li-Ping Mei,Jiu‐Ju Feng
标识
DOI:10.1016/j.snb.2022.132519
摘要
Antibiotics residues are still an important and noticeable issue, and realizing the ultra-sensitive, sample, and rapid detection of residual antibiotics in the environment is the basis for evaluating and monitoring the pollution status. Herein, a new bimetallic PtNi nanozyme-driven dual-amplified photoelectrochemical (PEC) aptasensor was developed for sulfamethazine (SMZ) assay based on the superior photosensitive material of Z-scheme heterostructured Co9S8@ In doped CdS nanotubes (Co9S8@In-CdS NTs). In this protocol, bimetallic alloyed nanotube PtNi was introduced as the mimic enzyme to instead of bio-enzyme for constructing of signal amplification strategy. On the basis of the outstanding photosensitivity of Co9S8@In-CdS NTs and highly catalytic property of PtNi nanozyme, the proposed PEC aptasensor exhibits a wide linear range of 0.05 pg mL–1 ~ 1.0 ng mL–1, and a low detection limit of 37.2 fg mL–1. This work put forwards a novel approach for the accurate analysis of antibiotics in the environment.
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