Solid-liquid-core optical fiber biosensor for highly sensitive and selective detection of 4-chlorophenol in water  

作　　者：Cangxu Feng Jianwei Zhang Chao Bian Linyang Li Rong Hu Haixing Chang Fei Peng Xiaofeng Peng Nianbing Zhong 

机构地区：[1]Center for Hydrogeology and Environmental Geology Survey,China Geological Survey,Baoding 071051,China [2]Intlligent Fiber Sensing Technology of Chongqing Municipal Engineering Research Center of Institutions of Higher Education,Chongqing Key Laboratory of Modern Photoelectric Detection Technology and Instrument,Chongqing Key Laboratory of Fiber Optic Sensor and Photodetector,Chongqing University of Technology,Chongqing 400054,China [3]School of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China

出　　处：《Chinese Chemical Letters》2023年第12期287-290,共4页中国化学快报（英文版）

基　　金：support from the National Natural Science Foundation of China(NSFC)(Nos.U19A20107,52176178 and 51876018);Innovation Research Group of Universities in Chongqing(No.CXQT21035);Chongqing Natural Science Foundation Innovation and Development Joint Fund Project(No.CSTB2022NSCQ-LZX0059);the Scientific and Technological Research Program of Chongqing Municipal Education Commission of China(No.KJZD-M202201101).

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 liquidcore optical fiber(LCOF)and 4-chlorophenol permselective polymer membrane.The U-shaped LCOF was flled with ethanol suspension of SiO_(2)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 SiO_(2)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),30μg/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.

关 键 词：4-CHLOROPHENOL Solid-liquid-core optical fiber Horseradish peroxidase Permselective polymermembrane Sensitivity SELECTIVITY 

分 类 号：X832[环境科学与工程—环境工程] TP212.3[自动化与计算机技术—检测技术与自动化装置]