Details

Autor(en) / Beteiligte

• Ahmad, Amirah
• Razali, Mohd Hasmizam
• Mamat, Mazidah
• Mehamod, Faizatul Shimal Binti
• Anuar Mat Amin, Khairul

Titel

Adsorption of methyl orange by synthesized and functionalized-CNTs with 3-aminopropyltriethoxysilane loaded TiO2 nanocomposites

Ist Teil von

• Chemosphere (Oxford), 2017-02, Vol.168, p.474-482

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This study aims to develop a highly efficient adsorbent material. CNTs are prepared using a chemical vapor deposition method with acetylene and synthesized mesoporous Ni-MCM41 as the carbon source and catalyst, respectively, and are then functionalized using 3-aminopropyltriethoxysilane (APTES) through the co-condensation method and loaded with commercial TiO2. Results of X-ray powder diffraction (XRD), Raman spectra, and Fourier transform infrared spectroscopy (FTIR) confirm that the synthesized CNTs grown are multi-walled carbon nanotubes (MWNTs). Transmission electron microscopy shows good dispersion of TiO2 nanoparticles onto functionalized-CNTs loaded TiO2, with the diameter of a hair-like structure measuring between 3 and 8 nm. The functionalized-CNTs loaded TiO2 are tested as an adsorbent for removal of methyl orange (MO) in aqueous solution, and results show that 94% of MO is removed after 10 min of reaction, and 100% after 30 min. The adsorption kinetic model of functionalized-CNTs loaded TiO2 follows a pseudo-second order with a maximum adsorption capacity of 42.85 mg/g. This study shows that functionalized-CNTs loaded TiO2 has considerable potential as an adsorbent material due to the short adsorption time required to achieve equilibrium. [Display omitted] •A functionalized-CNTs loaded TiO2 adsorbent material is synthesized.•The adsorbent material can effectively remove MO from aqueous solution.•The maximum capacity for MO removal is 42.85 mg/g.•Adsorption kinetics model of MO on functionalized-CNTs loaded TiO2 nanocomposites are elucidated.