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    陈硕

    • 教授     博士生导师   硕士生导师
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:环境学院
    • 学科:环境工程. 环境科学
    • 办公地点:大连理工大学环境学院B717
    • 联系方式:0411-84706263
    • 电子邮箱:shuochen@dlut.edu.cn

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    Photoelectrochemical aptasensor for sulfadimethoxine using g-C3N4 quantum dots modified with reduced graphene oxide

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    论文类型:期刊论文

    第一作者:Dang, Xueming

    通讯作者:Zhao, HM (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Minist Educ China, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China.

    合写作者:Zhao, Huimin,Wang, Xiaona,Sailijiang, Tangnuer,Chen, Shuo,Quan, Xie

    发表时间:2018-07-01

    发表刊物:MICROCHIMICA ACTA

    收录刊物:PubMed、SCIE

    卷号:185

    期号:7

    页面范围:345

    ISSN号:0026-3672

    关键字:Photoactive materials; Semiconductor; Aptamer; Antibiotic; Waste water analysis; Visible light; Photogenerated carriers; Graphitic-phase carbon nitride; Optical absorption; pi stacking interaction

    摘要:A novel photoelectrochemical (PEC) aptasensor with graphitic-phase carbon nitride quantum dots (g-C3N4; QDs) and reduced graphene oxide (rGO) was fabricated. The g-C3N4 QDs possess enhanced emission quantum yield (with an emission peak at 450 nm), improved charge separation ability and effective optical absorption, while rGO has excellent electron transfer capability. Altogether, this results in improved PEC performance. The method is making use of an aptamer against sulfadimethoxine (SDM) that was immobilized on electrode through pi stacking interaction. Changes of the photocurrent occur because SDM as a photogenerated hole acceptor can further accelerate the separation of photoexcited carriers. Under optimized conditions and at an applied potential of +0.2 V, the aptasensor has a linear response in the 0.5 nM to 80 nM SDM concentration range, with a 0.1 nM detection limit (at S/N = 3). The method was successfully applied to the analysis of SDM in tap, lake and waste water samples.