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CuO Nanosheets Modified with Amine and Thiol Grafting for High Catalytic and Antibacterial Activities

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journal contribution
posted on 16.05.2019, 00:00 by Julien Vieillard, Nabil Bouazizi, Mohammad Neaz Morshed, Thomas Clamens, Florie Desriac, Radhouane Bargougui, Pascal Thebault, Olivier Lesouhaitier, Franck Le Derf, Abdelkrim Azzouz
The aim of the present study is to develop an ecofriendly and cost-effective method for the synthesis and functionalization of copper oxide (CuO) nanosheets by chemical grafting of 3-(chloropropyl)­triethoxysilane (ClPTES), p-aminothiophenol (ATP) and diethanolamine (DEA). Full characterization of the resulting materials through FTIR, X-ray diffraction (XRD), scanning–transmission electron microscopy (STEM) and energy-dispersive X-ray fluorescence (ED-XRF) allowed confirmation of the grafting of ClPTES, ATP, DEA, and CuO crystalline phase and assessment of the average size of the as-prepared CuO (500 nm) and its high purity, respectively. Cu functionalization was found to confer high catalytic activity in 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP), methylene blue (MB) degradation, and decomposition of their mixture. Besides, DEA- and ATP-modified CuO also exhibited appreciable antibacterial capacity against Staphylococcus epidermidis and Escherichia coli. These results are of great importance because they provide the proof-of-concept that judicious modifications of mere CuO nanosheets provide low-cost polyfunctional materials with potential uses in catalysis and biomedical applications.