کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5363357 1388300 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vermiculite decorated with copper nanoparticles: Novel antibacterial hybrid material
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Vermiculite decorated with copper nanoparticles: Novel antibacterial hybrid material
چکیده انگلیسی

Vermiculite decorated with copper nanoparticles is a new antibacterial material that was prepared in this study through ion-exchange process and hydrogen reduction. The replacement of magnesium ions in interlayer structure was carried out using concentrated copper sulfate solutions at elevated temperature. Copper ions were reduced to elemental copper at 400-600 °C using hydrogen as the reducing agent. During the reduction process copper diffused primarily to vermiculite surface regions and formed copper nanoparticles with a broad range of sizes, from ∼1 to 400 nm. Strong adhesion of copper nanoparticles to the vermiculite carrier makes this hybrid very stable and durable. The new vermiculite-metallic copper hybrid material shows strong antibacterial activity against Staphylococcus aureus at 37 °C. Vermiculite is an inexpensive mineral that is very stable under a wide range of industrial and environmental conditions, and extensively used as filler in fireproof materials, plastics, paints and lightweight concrete, so the addition of copper as an antibacterial agent opens new avenues for the application of vermiculite in consumer products and other areas.

Highlights► We embedded vermiculite with nanoparticles of elemental copper. ► Copper nanoparticles reside on surfaces of vermiculite platelets with strong adhesion. ► The hybrid material has strong antibacterial activity against Staphylococcus aureus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 257, Issue 22, 1 September 2011, Pages 9435-9443
نویسندگان
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