A Novel Molecularly Imprinted Photoelectrochemical Sensor Based on g-C3N4-AuNPs for the Highly Sensitive and Selective Detection of Triclosan

被引:37
作者
Feng, Shasha [1 ]
Wei, Xiaoping [1 ]
Zhong, Li [1 ]
Li, Jianping [1 ]
机构
[1] Guilin Univ Technol, Guangxi Key Lab Electrochem & Magnetochem Funct M, Guangxi Coll & Univ Key Lab Food Safety & Detect, Coll Chem & Bioengn, Guilin 541004, Peoples R China
基金
中国国家自然科学基金;
关键词
Photoelectrochemical Sensor; Molecular Imprinting; Triclosan; Graphite-like Carbon Nitride; Gold Nanoparticles; ENHANCED PHOTOCATALYTIC ACTIVITY; CARBON NITRIDE; LIQUID-CHROMATOGRAPHY; WATER SAMPLES; WASTE-WATER; ELECTRODE; DEGRADATION; GLUTATHIONE; ASSAY;
D O I
10.1002/elan.201700514
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A novel molecularly imprinted polymer (MIP) photoelectrochemical sensor was fabricated for the highly sensitive and selective detection of triclosan. The MIP photoelectrochemical sensor was fabricated using graphite-like carbon nitride (g-C3N4) and gold nanoparticles (AuNPs) as photoelectric materials. The MIP/g-C3N4-AuNPs sensor used photocurrent as the detection signal and was triggered by ultraviolet light (UV-Light 365nm). g-C3N4-AuNPs was immobilized on indium tin oxide electrodes to produce the photoelectrochemically responsive electrode of the MIP/g-C3N4-AuNPs sensor. A MIP layer of poly-o-phenylenediamine was electropolymerized on the g-C3N4-AuNPs-modified electrode to act as the recognition element of the MIP/g-C3N4-AuNPs sensor and to enable the selective adsorption of triclosan to the sensor through specific binding. Under optimal experimental conditions, the designed MIP/g-C3N4-AuNPs sensor presented high sensitivity for triclosan with a linear range of 2x10(-12) to 8x10(-10) M and a limit of detection of 6.01x10(-13)M. Moreover, the MIP/g-C3N4-AuNPs sensor showed excellent selectivity. The sensor had been successfully applied in the analysis of toothpaste samples.
引用
收藏
页码:320 / 327
页数:8
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