镍铬合金纤维上原位可控生长镍铬层状双氢氧化物纳米片及其对氯酚的固相微萃取  

In-Situ Controlled Growth of NiCr Layered Double Hydroxide Nanosheets on Nichrome Alloy Fibers for Solid Phase Microextraction of Chlorophenols

作　　者：刘海霞[1,2] 饶红红 刘芳[1] 郑艳萍 姜永强[3] LIU Hai-Xia;RAO Hong-Hong;LIU Fang;ZHENG Yan-Ping;JIANG Yong-Qiang(School of Chemistry and Chemical Engineering,Lanzhou City University,Lanzhou 730070,China;Provincial Key Laboratory of Gansu Higher Education for City Environmental Pollution Control,Lanzhou 730070,China;Lanzhou Auxiliary Agent Plant Co.Ltd.,Lanzhou 730311,China)

机构地区：[1]兰州城市学院化学工程学院,兰州730070 [2]城市环境污染控制甘肃省高校省级重点实验室,兰州730070 [3]兰州助剂厂股份有限公司,兰州730311

出　　处：《分析化学》2025年第3期481-491,共11页Chinese Journal of Analytical Chemistry

基　　金：甘肃省高等学校科研项目(Nos.2023CYZC-69,2025A-163);兰州城市学院博士启动基金项目(No.LZCU-BS2024-07)资助。

摘　　要：以机械强度高、柔韧性强、抗蚀性能好和热稳定性高的镍铬合金丝(NiCr)为纤维基体,采用原位生长策略在NiCr纤维基体上组装了镍铬层状双氢氧化物纳米片(NiCr LDHs NSs)。将所组装的NiCr@NiCr LDHs NSs纤维与高效液相色谱-紫外检测(HPLC-UV)联用,对氯酚类化合物(CPs)的萃取性能进行了研究。结果表明,与商品化的聚二甲基硅氧烷(PDMS)、聚二甲基硅氧烷/二乙烯基苯(PDMS/DVB)和聚丙烯酸酯(PA)纤维相比,NiCr@NiCr LDHs NSs纤维对CPs显示良好的萃取选择性和更高的萃取效率。在优化的实验条件下,本方法检测0.2~200μg/L浓度范围内的CPs具有良好的线性关系,相关系数(R^(2))>0.9989,检出限(LODs)和定量限(LOQs)分别为0.050~0.157μg/L和0.165~0.502μg/L。单根纤维的日内和日间相对标准偏差(RSDs)分别在2.85%~4.05%和3.16%~4.96%之间。将本方法应用于环境水样中目标CPs的萃取富集和测定,加标回收率为80.0%~106.9%,RSDs在3.12%~7.81%之间。制备的NiCr@NiCr LDHs NSs纤维组装精密可控,可稳定使用240次以上。Nichrome(NiCr)wire with strong mechanical properties,excellent flexibility,good corrosion resistance and high thermal stability was selected as a promising fiber substrate to replace the fragile fused-silica counterpart.The NiCr layered double hydroxide nanosheets(NiCr LDHs NSs)were in-situ grown on the NiCr fiber substrate.Then,the extraction performance of the NiCr@NiCr LDHs NSs fiber was evaluated using four kinds of chlorophenol(CPs)as model compounds combined with high performance liquid chromatography-ultraviolet detection(HPLCUV).The results showed that the assembled fibers exhibited superior extraction selectivity and enhanced extraction efficiency for CPs in comparison to commercial PA,PDMS,and PDMS/DVB fibers.Under the optimized experimental conditions,the established method showed good linearity in the range of 0.2-200μg/L,with coefficient of determination(R^(2))>0.9989.The limits of detection(LODs)and limits of quantification(LOQs)were 0.050-0.157μg/L and 0.165-0.502μg/L,respectively.Relative standard deviations(RSDs)for intra-day and inter-day analyses ranged from 2.85% to 4.05% and from 3.16% to 4.96%,respectively.The developed method with the constructed fiber was applied to preconcentration and detection of different types of CPs in real water samples,showing satisfactory recoveries ranging from 80.0% to 106.9%,with RSDs of 3.12%-7.81%.Moreover,the NiCr@NiCr LDHs NSs fiber could maintain good extraction performance even after 240 extraction-desorption cycles.

关 键 词：镍铬合金纤维 镍铬层状双氢氧化物 原位生长 固相微萃取 氯酚 

分 类 号：O657.7[理学—分析化学]