dc.contributor.author |
Das, R
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|
dc.contributor.author |
Sypu, VS
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|
dc.contributor.author |
Paumo, HK
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|
dc.contributor.author |
Bhaumik, M
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|
dc.contributor.author |
Maharaj, V
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|
dc.contributor.author |
Maity, Arjun
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|
dc.date.accessioned |
2019-11-08T10:22:31Z |
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dc.date.available |
2019-11-08T10:22:31Z |
|
dc.date.issued |
2019-05 |
|
dc.identifier.citation |
Das, R. et.al. 2019. Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes. Applied Catalysis B: Environmental, v244, pp 546-558. |
en_US |
dc.identifier.issn |
0926-3373 |
|
dc.identifier.issn |
1873-3883 |
|
dc.identifier.uri |
https://www.sciencedirect.com/science/article/pii/S0926337318311317
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|
dc.identifier.uri |
https://doi.org/10.1016/j.apcatb.2018.11.073
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|
dc.identifier.uri |
http://hdl.handle.net/10204/11210
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|
dc.description |
Copyright: 2019 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 |
en_US |
dc.description.abstract |
Developing innovative technologies for the efficient treatment of wastewater containing toxic organic pollutants is of particular importance worldwide. Removal of organic contaminants from aqueous media through chemical reduction using noble metal-based nanocatalysts, and in the presence of NaBH4, as a reducing agent, has become an established approach in the last few years. Herein, we describe a simple method for the synthesis of a magnetic conducting polymer modified with mercaptoacetic acid (MAA) and silver nanoparticles (Ag NPs) as a promising catalyst for the reduction of organic pollutants. Ag NPs were deposited on the magnetic conducting polymer by the reduction of a silver salt precursor (AgNO3) without the need for a reducing agent or stabilizer. The developed Fe3O4@PPy-MAA/Ag nanocomposite was characterised using FE-SEM, TEM, XRD, XPS, BET and ATR-FTIR. The catalytic performance of the nanocatalyst during the reduction of 4-nitrophenol (4-NP) and organic dyes, namely, methylene blue (MB) and methyl orange (MO) was assessed in aqueous medium at 25°C. The catalyst exhibited excellent catalytic activity for the reduction of all three targeted organic pollutants (4-NP, MO and MB). The pseudo-first-order rate constants were estimated as 0.5–14.3 × 10-2 min-1, 0.52–24.2 × 10-2 s-1 and 10.1–46.8 × 10-3 s-1 for the reduction of 4-NP, MO and MB, respectively. The magnetic catalyst was separated easily from the reaction medium and recycled without significant loss of catalytic activity up to eight successive cycles. In addition to its green synthesis and reusability, findings from this study show that Fe3O4@PPy-MAA/Ag nanocomposite has the potential efficiency and stability to make it an ideal catalyst in environmental applications via chemical reduction of toxic contaminants from wastewater. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.relation.ispartofseries |
Worklist;22688 |
|
dc.subject |
4-Nitrophenol |
en_US |
dc.subject |
Ag NPs |
en_US |
dc.subject |
Silver nanoparticles application |
en_US |
dc.subject |
Silver nanoparticles synthesis |
en_US |
dc.subject |
Magnetic conducting polymers |
en_US |
dc.subject |
Organic dye degradation |
en_US |
dc.subject |
Recyclability |
en_US |
dc.title |
Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Das, R., Sypu, V., Paumo, H., Bhaumik, M., Maharaj, V., & Maity, A. (2019). Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes. http://hdl.handle.net/10204/11210 |
en_ZA |
dc.identifier.chicagocitation |
Das, R, VS Sypu, HK Paumo, M Bhaumik, V Maharaj, and Arjun Maity "Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes." (2019) http://hdl.handle.net/10204/11210 |
en_ZA |
dc.identifier.vancouvercitation |
Das R, Sypu V, Paumo H, Bhaumik M, Maharaj V, Maity A. Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes. 2019; http://hdl.handle.net/10204/11210. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Das, R
AU - Sypu, VS
AU - Paumo, HK
AU - Bhaumik, M
AU - Maharaj, V
AU - Maity, Arjun
AB - Developing innovative technologies for the efficient treatment of wastewater containing toxic organic pollutants is of particular importance worldwide. Removal of organic contaminants from aqueous media through chemical reduction using noble metal-based nanocatalysts, and in the presence of NaBH4, as a reducing agent, has become an established approach in the last few years. Herein, we describe a simple method for the synthesis of a magnetic conducting polymer modified with mercaptoacetic acid (MAA) and silver nanoparticles (Ag NPs) as a promising catalyst for the reduction of organic pollutants. Ag NPs were deposited on the magnetic conducting polymer by the reduction of a silver salt precursor (AgNO3) without the need for a reducing agent or stabilizer. The developed Fe3O4@PPy-MAA/Ag nanocomposite was characterised using FE-SEM, TEM, XRD, XPS, BET and ATR-FTIR. The catalytic performance of the nanocatalyst during the reduction of 4-nitrophenol (4-NP) and organic dyes, namely, methylene blue (MB) and methyl orange (MO) was assessed in aqueous medium at 25°C. The catalyst exhibited excellent catalytic activity for the reduction of all three targeted organic pollutants (4-NP, MO and MB). The pseudo-first-order rate constants were estimated as 0.5–14.3 × 10-2 min-1, 0.52–24.2 × 10-2 s-1 and 10.1–46.8 × 10-3 s-1 for the reduction of 4-NP, MO and MB, respectively. The magnetic catalyst was separated easily from the reaction medium and recycled without significant loss of catalytic activity up to eight successive cycles. In addition to its green synthesis and reusability, findings from this study show that Fe3O4@PPy-MAA/Ag nanocomposite has the potential efficiency and stability to make it an ideal catalyst in environmental applications via chemical reduction of toxic contaminants from wastewater.
DA - 2019-05
DB - ResearchSpace
DP - CSIR
KW - 4-Nitrophenol
KW - Ag NPs
KW - Silver nanoparticles application
KW - Silver nanoparticles synthesis
KW - Magnetic conducting polymers
KW - Organic dye degradation
KW - Recyclability
LK - https://researchspace.csir.co.za
PY - 2019
SM - 0926-3373
SM - 1873-3883
T1 - Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes
TI - Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes
UR - http://hdl.handle.net/10204/11210
ER -
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en_ZA |