Abstract
A series of solid alginate particles containing different amounts of functionalized multi-walled carbon nanotubes (MWCNTs) have been successfully prepared by microfluidic technique. The influence of MWCNTs doping on the surface morphology, structure and properties of calcium alginate (CA) particles has been investigated using SEM, FTIR, XRD, TGA and UV-Vis spectra. SEM indicates that the obtained hybrid particles are of good morphological characteristics, and its color changes from yellow to black which proves MWCNTs is successfully dispersed in CA particles. Moreover, the particles surface changes rough from smooth after MWCNTs doping. FTIR results verify the interactions between functional groups of CA and MWCNTs. Besides, the incorporation of MWCNTs to CA particles can efficiently enhance the thermal stability of CA particles at high temperatures, which is ascribed to the better thermal stability of MWCNTs as well as the interactions between MWCNTs and CA particles. The removal efficiency of CA particles doped with a lower percentage of MWCNTs (0.06 wt. %) for methylene blue is 96.38%, which is much higher than that of pure CA particles (61.21 %).
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