Abstract
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+.
Funder
National Natural Science Foundation of China
Research Start-up Fund for Special Professors of Shanxi Medical University
Key research project of science and technology plan in JinZhong-Social Development Projects
Natural Science Foundation of Shanxi Province of China
Transerve Scientific Reasearch Project of Shanxi Taiyuan Pharmaceutical Co. Ltd.
Special Project of Lvliang for Introduced High-level Science and Technology Talents
Subject
Spectroscopy,General Materials Science,Instrumentation,Atomic and Molecular Physics, and Optics