基于氧化铈纳米棒-聚乙烯醇气凝胶的模拟酶比色法检测水中氟离子  

Colorimetric Detection of Fluoride Ion by Oxidase Mimics Based on Ceric Dioxide Nanorods-Polyvinyl Alcohol Aerogel

作　　者：尚序东 王昶 喻靖源 张玉 杜衍[1,2,3] SHANG Xu-Dong;WANG Chang;YU Jing-Yuan;ZHANG Yu;DU Yan(State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;University of Chinese Academy of Sciences,Beijing 100039,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院长春应用化学研究所,电分析化学国家重点实验室,长春130022 [2]中国科学院大学,北京100039 [3]中国科学技术大学,合肥230026

出　　处：《分析化学》2021年第12期2023-2031,共9页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21874129);吉林省科技厅国际科技合作项目(No.20200801044GH)资助。

摘　　要：以聚乙烯醇气凝胶(PAA)为载体,水热法原位生长氧化铈(CeO_(2))纳米棒,制备了CeO_(2)纳米棒-聚乙烯醇气凝胶模拟酶材料(CeO_(2)-PAAC)。PAA载体不仅提高了CeO_(2)纳米棒的分散性,同时也提高了材料的重复利用率。利用CeO_(2)-PAAC材料的氧化酶活性以及氟离子(F-)对CeO_(2)纳米棒酶活性的增强作用构建了检测F-的比色传感器。在优化的实验条件下,检测F-的线性范围为80~4000μmol/L,检出限为63.7μmol/L(3σ),低于国际对V类地表水中F-的限量标准。与文献报道的F-检测方法相比,本方法的检测范围更宽。本方法具有良好的抗干扰能力和选择性,可用于环境水样中F-的检测,加标回收率为97.1%~120.4%。This work demonstrated an oxidase mimic,e.g.a composite consisting of poly(vinyl alcohol)aerogel(PAA)and CeO_(2)nanorods in-situ modified on the aerogel surface through a hydrothermal reaction.The introduction of PAA fixed the CeO_(2)nanorods,making its easy to separate with reaction solution in results of an improved recycling rate.The oxidase-like activity of the composite(CeO_(2)-PAAC)could be elevated by fluorid ion(F-),which was utilized to construct a colorimetric sensor for F-,exhibiting a detection range of 80-4000μmol/L and a detection limit(3σ)of 63.7μmol/L.Such a value was below the Chinese criterion for the Class V surface water(80μmol/L).Compared to other detection methods,this method had the merits of wider detection range and proportionate detection limit.Additionally,this method possessed eligible anti-interference ability and selectivity,and was adequate in detection of F-in lake water with recovery rate of 97.1%-120.4%,validating the potential application in the real scene.

关 键 词：氧化铈纳米棒 聚乙烯醇气凝胶 比色法 氟离子 检测 

分 类 号：X832[环境科学与工程—环境工程] O657.3[理学—分析化学] TB383.1[理学—化学]