The effect of copper and iron adsorption on the catalytic performance of alumina nanofiber / nanodiamond composite in sensing applications

Описание

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1016/j.jpcs.2022.110785

Ключевые слова: alumina nanofibers, copper ions, indicator system, iron ions, nanodiamonds, phenol detection

Аннотация: Phenolic compounds are common environmental pollutants, which are used in many industries and contaminate water environment due to industrial wastewater discharge. Presently, there is an increasing demand for the development and improvement of inexpensive, easy-to-use analytical tools for in-situ detection of phenolic compounds. InПоказать полностьюthis work, we investigate the effect of adsorption of Cu2+ and Fe2+ ions on the catalytic activity of a composite material based on alumina nanofibers (ANF) and detonation nanodiamonds (DND) in the co-oxidation of phenols with 4-aminoantipyrine in the presence of hydrogen peroxide. We have found more than two-fold increase of the catalytic activity for ANF + DND + Cu composite, while the activity of ANF + DND + Fe composite is found to decrease by several times in comparison with the original ANF + DND material. The results of FTIR analysis indicate that the adsorption of iron ions occurs with the formation of hydroxide surface groups and hydrogen bonds, which apparently block their catalytic activity in the Fenton redox cycle. The higher catalytic performance of AND + DND composite functionalized with copper ions makes it possible to detect two times lower concentrations of analytes (phenol and 4-chlorophenol) in comparison with the original composite. It is shown that the AND + DND + Cu composite provides a linear yield of the co-oxidation reaction product in a wide range of analyte concentrations (0.25–100 μM for phenol and 0.5–25 μM for 4-chlorophenol). Model experiments demonstrate the applicability of copper-functionalized composite as a reusable sensor for the determination of phenol in aqueous samples. © 2022 Elsevier Ltd

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Издание

Журнал: Journal of Physics and Chemistry of Solids

Выпуск журнала: Vol. 167

Номера страниц: 110785

ISSN журнала: 00223697

Издатель: Elsevier Ltd

Персоны

  • Ronzhin Nikita O. (Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation)
  • Posokhina Ekaterina D. (Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation)
  • Mikhlina Elena V. (Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation)
  • Shestakov Nikolai P. (Kirensky Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation)
  • Nemtsev Ivan V. (Kirensky Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation; Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation; Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
  • Bondar Vladimir S. (Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation)
  • Ryzhkov Ilya I. (Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation; Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation)

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