二氧化硅纳米片在钛纤维上的自组装及对环境水样中紫外线吸收剂的固相微萃取  

Self-assembly of silica nanosheets on titanium fibers for solids-phase microextraction of UV absorbers in environmental water samples

作　　者：王子宜 张兴辉 许士彦 华云洲 景雪平 杜新贞[2] WANG Ziyi;ZHANG Xinghui;XU Shiyan;HUA Yunzhou;JING Xueping;DU Xinzhen(School of Chemical Engineering,Lanzhou University of Arts and Science,Lanzhou 730000,China;College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730030,China)

机构地区：[1]兰州文理学院化工学院,兰州730000 [2]西北师范大学化学化工学院,兰州730030

出　　处：《分析试验室》2023年第8期1080-1087,共8页Chinese Journal of Analysis Laboratory

基　　金：2022年甘肃省自然科学基金项目(21JR11RA053);2022年陇原人才个人项目(111196101015);2020年兰州文理学院校级博士专项(2020BSZX08)资助。

摘　　要：采用溶胶-凝胶法(sol-gel)在钛丝(Ti)上成功组装了二氧化硅纳米片(SiO_(2)NSs)。在含氟电解液中,利用阳极氧化在Ti丝上原位生长了TiO_(2)纳米片(TiO_(2)NSs),得到Ti@TiO_(2)NSs。使用SiO_(2)NSs包覆Ti@TiO_(2)NSs得到Ti@TiO_(2)NSs@SiO_(2)NSs纤维。利用扫描电镜(SEM)和X射线能量色散谱(EDS)对其进行表征。将此纤维用于固相微萃取紫外线吸收剂(UVFs),在优化条件下,方法的线性范围为0.05~300μg/L,线性相关系数(R^(2))>0.999,方法检出限为9~59 ng/L。单根纤维处理25μg/L标准溶液时,日内和日间相对标准偏差(RSDs)分别为4.3%~5.1%和4.6%~5.8%。不同批次5根纤维的RSDs为5.3%~6.9%。方法成功应用于不同环境水样中目标UVFs的测定,回收率为93.2%~108.1%, RSDs为4.5%~7.1%。该纤维的组装精密可控,可稳定使用200次以上。Silica nanosheets(SiO_(2)NSs)were successfully assembled on titanium(Ti)wires by sol-gel method.TiO_(2)nanosheets(TiO_(2)NSs)were grown in situ on Ti wires using anodic oxidation in a fluoride-containing electrolyte to obtain Ti@TiO_(2)NSs.The Ti@TiO_(2)NSs@SiO_(2)NSs fibers were obtained by coating Ti@TiO_(2)NSs with SiO_(2)NSs.It was characterized by scanning electron microscopy(SEM)and X-ray energy dispersive spectroscopy(EDS).The fibers were used for solid-phase microextraction of ultraviolet absorbers(UVFs).Under the optimized conditions,six UVFs presented good linearity with the correlation coefficients(R^(2))greater than 0.999,and the limits of detection(LODs)ranged from 9 to 59 ng/L.The intra-day and inter-day relative standard deviations(RSDs)were from 4.3%to 5.1%and 4.6%to 5.8%for a single fiber at the spiked level of 25μg/L,respectively.The developed method was successfully applied to the selective enrichment and determination of target UVFs in environmental water samples with recoveries from 93.2%to 108.1%and RSDs from 4.5%to 7.1%.Moreover,the fiber can be fabricated in a precisely controllable manner and is stable for at least 200 extraction and desorption cycles.

关 键 词：钛纤维 阳极氧化 纳米二氧化硅 溶胶-凝胶 固相微萃取 紫外线吸收剂 

分 类 号：O656.31[理学—分析化学]