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Enhanced Detection of Nitrite Ions Over Copper Acetylacetonate/Polymeric Carbon Nitride Composites
Author(s) -
Jasman Siti Maryam,
Lintang Hendrik O.,
Yuliati Leny
Publication year - 2017
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201600042
Subject(s) - fourier transform infrared spectroscopy , copper , nitrite , quenching (fluorescence) , polymerization , graphitic carbon nitride , materials science , fluorescence , carbon nitride , nuclear chemistry , polymer , inorganic chemistry , photochemistry , chemistry , photocatalysis , catalysis , chemical engineering , composite material , organic chemistry , nitrate , physics , quantum mechanics , engineering , metallurgy
Summary Nitrogen containing compounds such as nitrite ions (N O 2 − ) may cause contaminations to the environment, food and drinking water, and they have a negative effect on human health. In this study, a novel fluorescence sensor was developed by modification of polymeric carbon nitride (CN) with copper(II) acetylacetonate (Cu(acac) 2 ). The polymeric CN was prepared by using urea as a precursor via thermal polymerization technique, while the Cu(acac) 2 was introduced onto the polymeric CN via an impregnation method. The formation of polymeric CN can be confirmed from the Fourier transform infrared (FTIR) and the diffuse reflectance ultraviolet visible (DR UV‐Vis) spectroscopies. The polymeric CN exhibited three excitation peaks at 277, 315, and 370 nm owing to the presence of CN, CO, and CN groups, respectively, while there was only one emission peak observed at 455 nm. The emission intensity was decreased with the increase of Cu(acac) 2 loading, suggesting certain interactions between the polymeric CN and the added Cu(acac) 2 . The performances of the polymeric CN and Cu(acac) 2 /CN composites as fluorescence sensors were evaluated forN O 2 −detection with concentration range of 0.5‐4 μM. It was revealed that the CN sites in the polymeric CN were the most favored quenching sites for theN O 2 − . With the addition of Cu(acac) 2 (0.1 mol%), the quenching rate for CN sites was enhanced two times higher than that of the polymeric CN. This study demonstrated that the composite is a promising fluorescence sensor for the detection ofN O 2 − .