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Hexagonal Mg(OH) 2 Nanosheets as Antibacterial Agent for Treating Contaminated Water Sources
Author(s) -
Azzam Ahmed M.,
Shenashen Mohamed A.,
Selim Mahmoud M.,
Alamoudi Ahmad S.,
ElSafty Sherif A.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701956
Subject(s) - antibacterial activity , bacteria , escherichia coli , staphylococcus aureus , bacterial cell structure , minimum inhibitory concentration , bacterial growth , chemistry , hexagonal crystal system , contamination , nanotechnology , contaminated water , microbiology and biotechnology , materials science , nuclear chemistry , biology , biochemistry , environmental chemistry , crystallography , ecology , genetics , gene
Many water sources are contaminated by Gram‐positive and Gram‐negative pathogenic bacteria. In this work, low‐cost antibacterial mesoporous nano‐hexagonal Mg(OH) 2 sheets (MNMSs) with uniform sizes of 250–450 nm were fabricated. Their structural features enabled the sheets to be a powerful antibacterial agent with high surface reactivity owing to well‐scattered pore windows that provide the sheets with a large surface area. Results revealed that the minimum inhibitory concentrations for Staphylococcus aureus and Escherichia coli bacteria were 0.45 and 0.50 mg ml −1 , respectively. MNMSs inhibited >97% of very high viable bacterial count 90×10 4 cfu ml −1 in a one‐step process through 12 hours. Complete inhibition of bacterial growth occurred while maintaining the MNMSs layer composition, indicating reusability. The MNMSs antibacterial agent surface areas were 21.83 and 20.09 m 2 g −1 for before and after usage, respectively, while the pore volume has no significant differences for MNMSs before and after usage represented by 0.043 and 0.044 cm 3 g −1 , respectively. The treated bacterial cells were completely inactivated through the interaction of nanosheets with bacteria, leading to extensively damaged cell membranes and decomposition of internal cellular components. Therefore, the MNMSs can be used to treat biological pollution in water.