Electrochemical aptasensor based on black phosphorus-porous graphene nanocomposites for high-performance detection of Hg2+

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外文摘要：A novel approach was developed to fabricate a label-free electrochemical aptasensor for specific detec-tion of mercury ions(Hg2+).This involved modifying polylysine(PLL)-coated black phosphorus-porous graphene(BP-PG)nanocomposites(PLL/BP-PG)onto the surface of glassy carbon electrodes(GCE),which were further modified with gold nanoparticles(AuNPs)to combine with a thiolated aptamer(Apt)capable of specifically recognizing Hg2+.BP-PG was synthesized using the solvothermal method and covalently bonded to form BP-PG nanosheets,resulting in significant enhanced electrochemical proper-ties of the PLL/BP-PG composite.Furthermore,the PLL/BP-PG composite was improved environmental stability of BP and provided a considerable quantity of-NH2 for bonding to AuNPs firmly by assembling.The physical properties and electrochemical behavior of the substrate materials were investigated using various characterization techniques,and analytical parameters were optimized.It is shown that,the Apt/AuNPs/PLL/BP-PG/GCE had a linear response(R2=0.999)with good selectivity and high sensitivity over the Hg2+range of 1-10,000 nmol/L.The proposed sensor has a detection limit of 0.045 nmol/L and can be employed for detecting of Hg2+.It also obtained satisfying results in river water,soil and vegetable samples.

外文关键词：

Hg2+Electrochemical sensorBlack phosphorus-porous grapheneAptamerAuNPs

作者：

Jie Zhou、Chuanxiang Zhang、Changchun Hu、Shuo Li、Yuan Liu、Zhu Chen、Song Li、Hui Chen、Rokayya Sami、Yan Deng

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作者单位：

Hengyang Medical School,University of South China,Hengyang 421001,China

Institute for Future Sciences,University of South China,Changsha 410000,China

Hunan Key Laboratory of Biomedical Nanomaterials and Devices,Hunan University of Technology,Zhuzhou 412007,China

College of Packing and Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China

Department of Food Science and Nutrition,College of Sciences,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia

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出版年：

2024

DOI：

10.1016/j.cclet.2024.109561

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(11)