Characterization of magnetic soluble starch-functionalized carbon nanotubes and its application for the adsorption of the dyes.
Soluble starch-functionalized multiwall carbon nanotube composites (MWCNT-starch) were prepared to improve the hydrophilicity and biocompatibility of MWCNTs. Characterization of the MWCNT-starch by Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), transmission electron microscope (TEM) and thermogravimetric analysis (TG), showed that the starch component (about 14.3 wt%) was covalently grafted onto the surface of MWCNT. MWCNT-starch-iron oxide composites, intended for use as adsorbents for the removal of dyes from aqueous solutions, were prepared by synthesizing iron oxide nanoparticles at the surface of MWCNT-starch. Starch acts as a template for growth of iron oxide nanoparticles which are uniformly dispersed on the surface of the MWCNT-starch. MWCNT-starch-iron oxide exhibits superparamagnetic properties with a saturation magnetization (23.15 emu/g) and better adsorption for anionic methyl orange (MO) and cationic methylene blue (MB) dyes than MWCNT-iron oxide.
Bioproducts and Bioprocesses National Science Program, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK S7N 0X2, Canada.
Peter R
PR
Chang
Pengwu
P
Zheng
Baoxiang
B
Liu
Debbie P
DP
Anderson
Jiugao
J
Yu
Xiaofei
X
Ma
D000327:Adsorption; D000465:Algorithms; D001391:Azo Compounds; D004396:Coloring Agents / Q000302:isolation & purification*; D004058:Diffusion; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010316:Particle Size; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000737:chemistry*; D013499:Surface Properties; D013818:Thermogravimetry; D014867:Water; D014961:X-Ray Diffraction
D001391:Azo Compounds; D004396:Coloring Agents; D037742:Nanotubes, Carbon; D012996:Solutions; D014867:Water; C100258:methyl orange; D013213:Starch