荧光
细胞内
硫黄
材料科学
氮化物
碳纤维
石墨氮化碳
兴奋剂
纳米技术
环境化学
化学工程
化学
冶金
光催化
生物化学
催化作用
光学
工程类
图层(电子)
复合材料
物理
复合数
光电子学
作者
Lingling Zheng,Yangyang Yan,Ning Wang,Mingli Li,Shaomin Shuang,Wei Bian,Martin M. F. Choi
出处
期刊:Methods and Applications in Fluorescence
[IOP Publishing]
日期:2022-07-27
卷期号:10 (4): 045001-045001
标识
DOI:10.1088/2050-6120/ac8223
摘要
Abstract Silver is widely used in medical materials, photography, electronics and other industries as a precious metal. The large-scale industrial production of silver-containing products and liquid waste emissions aggravate the environmental pollution. Silver ion is one of the most toxic metal ions, causing pollution to the environment and damage to public health. Therefore, the efficient and sensitive detection of Ag + in the water environment is extremely important. Sulfur-doped carbon nitride nanosheets (SCN Ns) were prepared by melamine and thiourea via high-temperature calcination. The morphology, chemical composition and surface functional groups of the SCN Ns were characterized by SEM, TEM, XRD, XPS, and FT-IR. The fluorescence of SCN Ns was gradually quenched as the Ag + concentration increased. The detection limit for Ag + was as low as 0.28 nM. The quenching mechanism mainly is attributed to static quenching. In this paper, SCN Ns were used as the fluorescent probe for detecting Ag + . SCN Ns have successfully detected Ag + in different environmental aqueous samples and cells. Finally, SCN Ns were further applied to the visual quantitative detection of intracellular Ag + .
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