生物传感器
氯酚
分子印迹聚合物
材料科学
聚合物
光纤
检出限
选择性
光纤传感器
聚砜
膜
芯(光纤)
纤维
化学
色谱法
纳米技术
光学
复合材料
有机化学
生物化学
苯酚
物理
催化作用
作者
Cangxu Feng,Jianwei Zhang,Chao Bian,Linyang Li,Rong Hu,Haixing Chang,Fei Peng,Xiaofeng Peng,Nianbing Zhong
标识
DOI:10.1016/j.cclet.2023.108457
摘要
A novel solid–liquid-core fiber-optic biosensor was fabricated for highly sensitive and selective detection of 4-chlorophenol in water. The sensor comprised horseradish peroxidase (HRP)-coated U-shaped liquid-core optical fiber (LCOF) and 4-chlorophenol permselective polymer membrane. The U-shaped LCOF was filled with ethanol suspension of SiO2 particles and the polymer membrane was composed of molecularly imprinted polymer, sulfonated polyethersulfone, and polysulfone. The morphology, composition, and surface luminous properties of the sensing region were examined. The effects of the diameter and content of SiO2 particles and temperature of 4-chlorophenol solutions on the sensitivity of the biosensors were investigated. Further, the sensitivity, selectivity, response time, and limit of detection (LOD) of the biosensors was investigated. In addition, the effects of fiber core materials on the light transmission in sensing region were investigated and a biosensor sensing model was established. The proposed sensor exhibited high selectivity for 4-chlorophenol with satisfactory sensitivity, LOD, and response time: −1.18 (μg/L)−1, 30 μg/L, and 400 s, respectively. The results are expected to aid in the development of methods for enhancing sensitivity of fiber-optic sensors and surface luminous intensity of optical fibers.
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