Characterization of magnetic soluble starch-functionalized carbon nanotubes and its application for the adsorption of the dyes

• Published in: Journal of hazardous materials Vol. 186; no. 2-3; pp. 2144 - 2150
• Main Authors: Chang, Peter R., Zheng, Pengwu, Liu, Baoxiang, Anderson, Debbie P., Yu, Jiugao, Ma, Xiaofei
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 28.02.2011; Elsevier
• Subjects: adsorbents; Adsorption; Algorithms; Applied sciences; aqueous solutions; Atmospheric pollution; Azo Compounds; biocompatibility; carbon nanotubes; Cationic; Chemical engineering; Coloring Agents - isolation & purification; Diffusion; Dye; Dyes; Exact sciences and technology; Fourier transform infrared spectroscopy; hydrophilicity; Iron oxides; Magnetic separation; Magnetics; methyl orange; methylene blue; Microscopy, Electron, Transmission; Multiwall carbon nanotube; Nanoparticles; Nanotubes, Carbon - chemistry; Oxides; Particle Size; Pollution; Soluble starch; Solutions; Spectrophotometry, Ultraviolet; Spectroscopy; Spectroscopy, Fourier Transform Infrared; starch; Starch - chemistry; Starches; Surface chemistry; Surface Properties; Thermogravimetry; transmission electron microscopes; transmission electron microscopy; Water; X-Ray Diffraction; Dye; Magnetic separation; Adsorption; Multiwall carbon nanotube; Soluble starch; Dyes; Nanoparticle; Saturation; Thermogravimetry; Ultrafine particle; X ray diffraction; Composite material; Ultraviolet radiation; Transmission electron microscopy; Aerosols; Biocompatibility; Air pollution; Aqueous solution; Fourier-transformed infrared spectrometry
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2010.12.119

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 14.3wt%) 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 (23.15emu/g) and better adsorption for anionic methyl orange (MO) and cationic methylene blue (MB) dyes than MWCNT-iron oxide.