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• W2596585507 abstract "Abstract Silver nanocomposites (AgNCs) were produced by adsorption onto an electron-rich polypyrrole-mercaptoacetic acid (PPy-MAA) composite, known to be a highly efficient adsorbent for the removal of Ag+ ions from aqueous media in the remediation of metal- contaminated water sources. In situ reduction of Ag+ cations to Ag0 nanoparticles (NPs) was achieved in the absence of an additional reducing agent, and the AgNCs formed were characterized by FE-SEM, EDAX, HR-TEM, STEM, XRD, ATR-FTIR, and XPS. An investigation into the potential application of these AgNCs, effectively a waste product for further processing, as a catalyst for the reduction of variously substituted nitroarenes in water was undertaken in an effort to beneficiate the materials and determine the reaction's specificity. One composite having 11.14 ± 0.05 wt% Ag content was particularly active in these reductions, with aniline derivatives being prepared in 71–94% yields. The kinetics of the reaction was examined using 4- nitrophenol, a common water-soluble pollutant; pseudo-first-order kinetics was observed with predicted activation energy of 68.3 kJ/mol for this system. Furthermore, this AgNC displayed superior stability over 10 reaction cycles without loss of catalytic activity. A mechanism was elucidated based on these findings. The mild, economical, and efficient reduction method using a reusable “waste” material may prove a promising alternative for further industrial application." @default.
• W2596585507 created "2017-03-23" @default.
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• W2596585507 date "2017-07-01" @default.
• W2596585507 modified "2023-09-23" @default.
• W2596585507 title "An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite" @default.
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• W2596585507 doi "https://doi.org/10.1016/j.apcatb.2017.03.033" @default.
• W2596585507 hasPublicationYear "2017" @default.
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