Giri, SDas, RVan der Westhuyzen, Christiaan WMaity, Arjun2017-11-222017-11-222017-07Giri, S. et al. 2017. An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite. Applied Catalysis B: Environmental, vol. 209: 669-6780926-3373doi.org/10.1016/j.apcatb.2017.03.033http://www.sciencedirect.com/science/article/pii/S0926337317302461http://hdl.handle.net/10204/9815Copyright: 2017 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, kindly consult the publisher's website.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(sup)+ cations to Ag(sup0) 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.enRemediationWasteAg nanoparticlesNitroarene reductionReusableArticleGiri, S., Das, R., Van der Westhuyzen, C. W., & Maity, A. (2017). An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite. http://hdl.handle.net/10204/9815Giri, S, R Das, Christiaan W Van der Westhuyzen, and Arjun Maity "An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite." (2017) http://hdl.handle.net/10204/9815Giri S, Das R, Van der Westhuyzen CW, Maity A. An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite. 2017; http://hdl.handle.net/10204/9815.TY - Article AU - Giri, S AU - Das, R AU - Van der Westhuyzen, Christiaan W AU - Maity, Arjun AB - 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(sup)+ cations to Ag(sup0) 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. DA - 2017-07 DB - ResearchSpace DP - CSIR KW - Remediation KW - Waste KW - Ag nanoparticles KW - Nitroarene reduction KW - Reusable LK - https://researchspace.csir.co.za PY - 2017 SM - 0926-3373 T1 - An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite TI - An efficient selective reduction of nitroarenes catalyzed by reusable silver-adsorbed waste nanocomposite UR - http://hdl.handle.net/10204/9815 ER -