Tip-porous microneedle: A highly stable sensing platform for direct determination of labile metals in natural seawater

doi:10.1016/j.envpol.2022.120687

	Tip-porous microneedle: A highly stable sensing platform for direct determination of labile metals in natural seawater
	Han, Haitao1 ; Wang, Jie 2; Pan, Dawei1,3 ; Li, Ying 4; Wang, Chenchen 1
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
	2023
卷号	316 页码:6
关键词	Microneedle sensor Electrochemical etching Porous structure Labile metals Copper Natural seawater
DOI	10.1016/j.envpol.2022.120687
英文摘要	Nanomaterial-functionalized voltammetric microsensors are promising tools for detecting trace metals at low concentrations in the complex environment of natural seawater. However, the sensitivity reduction caused by the loss of modified nanomaterials in the detection process has always been a major problem. Herein, to fabricate a highly stable sensing platform, a microneedle electrode with a hierarchical porous tip was prepared through electrochemical etching technology to firmly embed nanoparticles. Using copper (Cu) as a model trace metal, a micro-cluster needle sensor based on a gold nanoparticle (AuNP)-embedded tip-porous microneedle electrode (PMNE) was fabricated for the direct voltammetric determination of labile Cu in natural seawater. The porous structure of P-MNE not only provided a larger specific surface area and active sites for AuNPs which had excellent electrocatalytic performance for Cu2+ determination, but also protected from their loss during the detection process in seawater. Therefore, this novel micro-cluster needle sensor exhibited significantly improved stability with a relative standard deviation (RSD) of 1.5% for 30 detections. The linear range of Cu2+ on this micro-cluster needle sensor was from 0.1 to 1000 nM with a detection limit of 0.03 nM. More importantly, this micro-cluster needle sensor was successfully used for directly detecting labile Cu in natural seawater samples without any preaccumulation treatment or reagent addition to obtain the contribution proportions of the labile fraction in total dissolved Cu. Furthermore, this sensing platform might also be extended to the reliable determination of other labile metals in seawater by changing the functional nanoparticles embedded in the nanopores.
收录类别	SCI
语种	英语
关键词[WOS]	NANOPOROUS STAINLESS-STEEL ; SIMULTANEOUS ELECTROCHEMICAL DETERMINATION ; GALVANIC REPLACEMENT ; COPPER ; ELECTRODE ; SPECIATION ; GOLD ; NANOPARTICLES ; LEAD ; MICROELECTRODES
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000903924100002
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/32511
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
通讯作者	Pan, Dawei
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pro, CAS Key Lab Coastal Environm Proc & Ecol Remediat,, Yantai 264003, Peoples R China 2.Yantai Univ, Sch Chem & Chem Engn, Yantai 264005, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Ocean Univ China, Coll Chem & Chem Engn, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China
推荐引用方式 GB/T 7714	Han, Haitao,Wang, Jie,Pan, Dawei,et al. Tip-porous microneedle: A highly stable sensing platform for direct determination of labile metals in natural seawater[J]. ENVIRONMENTAL POLLUTION,2023,316:6.
APA	Han, Haitao,Wang, Jie,Pan, Dawei,Li, Ying,&Wang, Chenchen.(2023).Tip-porous microneedle: A highly stable sensing platform for direct determination of labile metals in natural seawater.ENVIRONMENTAL POLLUTION,316,6.
MLA	Han, Haitao,et al."Tip-porous microneedle: A highly stable sensing platform for direct determination of labile metals in natural seawater".ENVIRONMENTAL POLLUTION 316(2023):6.