Xuehua Zhang , Haocheng Sun , Xiaoting Li , Jian Cao , Ning Ma , Minli Tao , Wenqin Zhang
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引用次数: 0
Abstract
Various amine-functionalized polyacrylonitrile fibers (PANEF, PANPF, PANBF, PANNPF, and PANDNPF) were prepared and employed to detect and adsorb 1,4-benzoquinone. After comparing the different types of amines and different carbon chain lengths, the most evident color change was observed in PANNPF. This material possessed a suitable carbon chain length, strong alkalinity, and an adsorption capacity of up to 1.32 mol mol−1. Following its immersion in a 1,4-benzoquinone solution for 30 s, PANNPF rapidly changed from yellow to dark brown. This interaction between amine and 1,4-benzoquinone was quick, rendering this approach effective for real-time monitoring. Moreover, PANNPF was highly effective in detecting 1,4-benzoquinone in water across a wide pH range (3–10), with a detection limit as low as 0.5 ppm. PANNPF maintained its sensitivity and underwent stable color changes even at low temperatures (0 °C), and the presence of ions and compounds in practical applications did not interfere with its discoloration behavior. The kinetic and isotherm curves revealed that the adsorption process was consistent with the Langmuir isothermal adsorption and pseudo-second-order kinetic models, demonstrating the chemical adsorption of 1,4-benzoquinone by PANNPF. These findings highlight the superior detection capabilities of PANNPF, rendering it an efficient and reliable material for environmental monitoring and water purification.
期刊介绍：
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.
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