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IrEMS is a nonprofit organization of national or regional members. Its primary purpose is to provide a means whereby those regional scientists engaged in environmental mutagenesis research and related fields in Iran and other regional countries may communicate more readily with each other, thereby advancing both basic and applied research in this area of science.

Journal Article

Journal article

Silica-Supported Copper Oxide Nanoleaf with Antimicrobial Activity Against Escherichia Coli  [2017]

Ghorbanpour, Mohammad; Moghimi, Mohsen; Lotfiman, Samaneh;

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In this research, a simple and fast method was employed to synthesize CuO nanoleaves/silica gel nanocomposites (CuO/SGn), which is a cost effective antimicrobial material. CuSO4.5H2O is the only raw material used in CuO/SGn production through the molten salt method. The structure and morphology of the nanocomposites were characterized by DRS, XRD, and SEM. The copper size in CuO/SG was found to be dependent on the immersion time in molten salt. SEM images revealed smaller-sized particle leaves, from a sample obtained after longer immersion time.The antimicrobial activity of CuO/SGn was investigated against Escherichia coli. The produced CuO/SGn showed inhibitory effect against E. coli. However, the growth-inhibitory effect depends on the copper content and size. Lower loading of CuO nanoparticles in 10 min immersion time resulted in less antibacterial activity (73.33%) and sample obtained from longer immersion time demonstrated higher antibacterial activity (up to 99.96%). The maximum amount of released Cu ions from nanocomposites produced in 90 min was 12.2 ppm after 6 h.  Furthermore, the minimum release of Cu ions was observed by 3 h for 40 min nnanocomposite.