A novel photoelectrochemical sensor based on g-C3N4@CdS QDs for sensitive detection of Hg2+

被引：52
|
作者：
Li, Zhongping [1 ,2 ]
Dong, Wenxia [1 ,2 ]
Du, Xiaoyu [1 ,2 ]
Wen, Guangming [1 ,2 ,3 ]
Fan, Xiujun [4 ]
机构：
[1] Shanxi Univ, Inst Environm Sci, Taiyuan 030006, Shanxi, Peoples R China
[2] Shanxi Univ, Sch Chem & Chem Engn, Taiyuan 030006, Shanxi, Peoples R China
[3] Jinzhong Univ, Sch Chem & Chem Engn, Jinzhong 030619, Peoples R China
[4] Shanxi Univ, Inst Crystalline Mat, Taiyuan 030006, Shanxi, Peoples R China
来源：
MICROCHEMICAL JOURNAL | 2020年 / 152卷
基金：
中国国家自然科学基金;
关键词：
Photoelectrochemical; He2+; Graphite carbonitride (g-C3N4); CdS quantum dots (CdS QDs); HYDROGEN EVOLUTION; CARBON NITRIDE; QUANTUM DOTS; DOPED G-C3N4; HG2+; PHOTOCATALYST; COCATALYST; GENERATION; APTASENSOR; NANOSHEETS;
D O I：
10.1016/j.microc.2019.104259
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Graphite carbonitride (g-C3N4) is one of the ideal metal-free semiconductors for photocatalysis, quantum dots are excellent photoelectrically active materials, and both have broad application prospects in photoelectrochemical (PEC) devices. In this work, a novel photoelectrochemical (PEC) sensor was latest employed based on the complex of g-C(3)N(4 )and CdS QD (g-C3N4@CdS) fixated on a tin oxyfluoride (FTO) electrode for discovering Hg2+. The PEC system showed a good linear range of 20-550 nM, with a detection limit of 12 nM, The possible mechanism is signal shutdown strategy based on a lower sedimentation equilibrium constant of HgS. Thus, the g-C3N4@CdS based PEC sensor had positive effect on solving some issues, such as complicated operation, in the detection of He2+.
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收藏
页数：7
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