title: Monolayer g-C3N4 Fluorescent Sensor for Sensitive and Selective Colorimetric Detection of Silver ion from Aqueous Samples.
abstract: Rapid and sensitive detection of heavy-metal ions in natural water environments worldwide is urgently needed because of their severe threats to human health. In the present work, monolayer graphite-like flake C3N4 (g-C3N4) materials were applied as a new fluorescent sensor for the detection of trace silver ion in aqueous solution. The thickness of synthesized g-C3N4 was 0.45 nm and obtained by exfoliating twice with ultrasonic. With the presence of ethylene diamine tetraacetic acid as a screening agent, the highly sensitive sensor reached a low detection limit of 52.3 nmol/L for silver (I) ion and there was no disturbance when silver (I) ion coexisted with other metal ions in water samples. Under the optimal conditions, the monolayer g-C3N4 was successfully used to detect trace silver (I) ion in different environmental water and drinking water samples.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China. caoyj@scnu.edu.cn.|Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China. caoyj@scnu.edu.cn.
authors.forename: Yujuan
authors.initials: Y
authors.lastname: Cao
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Peng
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.|Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Hu
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.|Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Yu
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D003124:Colorimetry / Q000379:methods*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006801:Humans; D009570:Nitriles / Q000737:chemistry*; D012834:Silver / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005456:Fluorescent Dyes; D009570:Nitriles; D014874:Water Pollutants, Chemical; D012834:Silver; C011206:cyanogen
keywords: Aqueous samples; Fluorescent sensor; Monolayer g-C3N4; Silver (I) ion