Preparation and Synthesis of N -MWCNT Nanocomposite Using Hydrothermal Method

CNTs have a promising future as sorbent for the removal of different pollutants from wastewater. Multi-wall carbon nanotubes possess some favorable attributes of tiny size and diameter, layered hollow skeleton, enormous surface area, high aspect ratio, and good mechanical strength and conductivity. Nonetheless, MWCNTs nanocomposite could not be easily separated from the liquid phase via filtration or centrifugation owing to their nano size and low density. The uncontrolled discharge of MWCNTs in the environment is a trouble due to their natural and ecological damages. Thus, the fabrication of an MWCNTs nanocomposite with easily separable is critical to its wide application in the future. The N-MWCNTs nanocomposites were fabricated via the hydrothermal route. Briefly, ۱۵۰ mg MWCNT was dispersed into a ۷۰ mL double distilled water to obtain a homogeneous solution. Then, a solution of ۱.۵M Fe(NO۳)۲ and ۱.۵M Al(NO۳)۳ was added to the aforementioned mixture. A few drops of NaOH solution (۳ M) were gently added under constant mechanical stirring for adjusting the pH of the solution (pH=۱۱). Afterward, the suspension was stirring at ۴۵°C for ۳ hours in a hot bath. Then the homogeneous suspension shifted to autoclave (Teflon lined) and heated at ۱۷۵°C in an electric oven and kept at this temperature for ۱۵ hours. To remove impurities, obtained product was rinsed using double distilled water several times and subsequently the N-MWCNTs nanocomposite were separated from the liquid phase by a magnet. At the end, the nanocomposites were dried in an electric oven at ۱۰۵ ± ۵°C for ۷ hours. The fabricated N-MWCNT adsorbent was stored in a desiccator before use.

کلیدواژه ها:

N-MWCNT nanocomposite ، hydrothermal method ، synthesis