Journal
APPLIED CLAY SCIENCE
Volume 150, Issue -, Pages 47-55Publisher
ELSEVIER
DOI: 10.1016/j.clay.2017.08.024
Keywords
Silver nanoparticles; Montmorillonite; Dopamine; Catalytic reduction; Methylene blue
Funding
- National Natural Science Foundation of China [21476249]
- Natural Science Foundation of Shandong Province in China [2014ZRF01105]
- Key Science and Technology Program of Shandong Province [2014GHY115021]
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Water 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 kip higher than 1.70 min(-1). More importantly, the Ag NPs@Mt was proven to show excellent recyclability for at least 20 cycles 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.
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