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Synthesis of UMCNOs from MWCNTs and analysis of its structure and properties for wastewater treatment applications

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Abstract

Multi-walled carbon nanotubes (MWCNTs) are non-polar carbon tubes having poor dispersion capability in different solvents. To overcome this limitation, the oxidative unzipping of MWCNTs was done and results in the preparation of unzipped multi-walled carbon nanotube oxide (UMCNOs). The UMCNOs was characterized using field-emission scanning electron microscope, Fourier transformed infrared spectrophotometer, and X-ray diffractometer. The hybrid structure was able to improve the accessible areas significantly due to the availability of both outer and inner walls of MWCNTs. UMCNOs-cotton sponge was prepared by dipping commercial cotton in unzipped carbon nano-oxide dispersion and drying in a vacuum oven. UMCNOs-Cot sponge exhibits hydrophilic and hydrophobic properties at different conditions showed its amphiphilic nature. Hydrophobic properties of UMCNOs lower the interfacial energy of the coated cotton surface with a maximum water contact angle of 145° and super-oleophilicity showed the absorption capacity of oil from an oil/water mixture. These UMCNOs-Cot sponges were applied for the separation of oils, organic solvents with absorption capacities in the range of 21–43 times as compared to its weight. A significant loss of bacterial cell viability up to 99% was also achieved with this UMCNOs-Cot sponge.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Correspondence to R. P. Vijayakumar.

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Dwivedi, P., Vijayakumar, R.P. Synthesis of UMCNOs from MWCNTs and analysis of its structure and properties for wastewater treatment applications. Appl Nanosci 8, 1989–2000 (2018). https://doi.org/10.1007/s13204-018-0868-8

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  • DOI: https://doi.org/10.1007/s13204-018-0868-8

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