Electrochemical aptasensor based on black phosphorus-porous graphene nanocomposites for high-performance detection of Hg^(2+)  

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

机构地区：[1]Hengyang Medical School,University of South China,Hengyang 421001,China [2]Institute for Future Sciences,University of South China,Changsha 410000,China [3]Hunan Key Laboratory of Biomedical Nanomaterials and Devices,Hunan University of Technology,Zhuzhou 412007,China [4]College of Packing and Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China [5]Department of Food Science and Nutrition,College of Sciences,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia

出　　处：《Chinese Chemical Letters》2024年第11期372-377,共6页中国化学快报（英文版）

基　　金：financially supported by the NSF of China(No.61871180);2022 Special Project for the Construction of Innovative Provinces to Fight the COVID-19 Outbreak(No.2022SK2115);Natural Science Foundation of Hunan Province of China(Nos.2022JJ30230,2021JJ30213);the Deanship of Scientific Research,Taif University。

摘　　要：A novel approach was developed to fabricate a label-free electrochemical aptasensor for specific detection of mercury ions(Hg^(2+)).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 Hg^(2+).BP-PG was synthesized using the solvothermal method and covalently bonded to form BP-PG nanosheets,resulting in significant enhanced electrochemical properties of the PLL/BP-PG composite.Furthermore,the PLL/BP-PG composite was improved environmental stability of BP and provided a considerable quantity of-NH_(2)for bonding to Au NPs 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(R~2=0.999)with good selectivity and high sensitivity over the Hg^(2+)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 Hg^(2+).It also obtained satisfying results in river water,soil and vegetable samples.

关 键 词：Hg^(2+) Electrochemical sensor Black phosphorus-porous graphene APTAMER AuNPs 

分 类 号：X832[环境科学与工程—环境工程] O657.1[理学—分析化学] TP212[理学—化学]