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Sustainable catalytic properties of silver nanoparticles supported montmorillonite for highly efficient recyclable reduction of methylene blue
AbstractWater contamination by organic dyes has become a serious environmental pollution. Here, a facile, green and cost-effective synthesis approach was developed to in situ grow silver nanoparticles (Ag NPs) on the eco-friendly and low cost natural material montmorillonite (Mt) through dopamine chemistry. The loading amount of silver on the montmorillonite reached 20 mass %. The Ag NPs supported montmorillonite (Ag NPs@Mt) exhibited excellent catalytic performances to reduce a model organic dye methylene blue in the presence of NaBH4 with catalytic efficiency higher than 98% and apparent reduction rate constant kapp higher than 1.70min−1. More importantly, the Ag NPs@Mt was proven to show excellent recyclability for at least 20cycles and long-term stability for one month soaking in water. This low-cost and recyclable Ag NPs@Mt shows great potential in large scale application to treat dye containing wastewater.
Graphical abstract
HighlightsSilver nanoparticles supported montmorillonite (Ag NPs@Mt) was achieved through dopamine chemistry.Ag NPs@Mt showed highly efficient catalytic reduction of methylene blue with apparent reduction rate constant higher than 1.70min-1.Ag NPs@Mt showed excellent recyclability for at least 20 cycles and long-term stability for one month soaking in water.
Sustainable catalytic properties of silver nanoparticles supported montmorillonite for highly efficient recyclable reduction of methylene blue
AbstractWater contamination by organic dyes has become a serious environmental pollution. Here, a facile, green and cost-effective synthesis approach was developed to in situ grow silver nanoparticles (Ag NPs) on the eco-friendly and low cost natural material montmorillonite (Mt) through dopamine chemistry. The loading amount of silver on the montmorillonite reached 20 mass %. The Ag NPs supported montmorillonite (Ag NPs@Mt) exhibited excellent catalytic performances to reduce a model organic dye methylene blue in the presence of NaBH4 with catalytic efficiency higher than 98% and apparent reduction rate constant kapp higher than 1.70min−1. More importantly, the Ag NPs@Mt was proven to show excellent recyclability for at least 20cycles and long-term stability for one month soaking in water. This low-cost and recyclable Ag NPs@Mt shows great potential in large scale application to treat dye containing wastewater.
Graphical abstract
HighlightsSilver nanoparticles supported montmorillonite (Ag NPs@Mt) was achieved through dopamine chemistry.Ag NPs@Mt showed highly efficient catalytic reduction of methylene blue with apparent reduction rate constant higher than 1.70min-1.Ag NPs@Mt showed excellent recyclability for at least 20 cycles and long-term stability for one month soaking in water.
Sustainable catalytic properties of silver nanoparticles supported montmorillonite for highly efficient recyclable reduction of methylene blue
Wang, Ning (author) / Hu, Yunxia (author) / Zhang, Zongren (author)
Applied Clay Science ; 150 ; 47-55
2017-08-23
9 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2018