title: Adsorption of methyl orange by synthesized and functionalized-CNTs with 3-aminopropyltriethoxysilane loaded TiO2nanocomposites.
abstract: 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 TiO2nanoparticles onto functionalized-CNTs loaded TiO2, with the diameter of a hair-like structure measuring between 3 and 8 nm. The functionalized-CNTs loaded TiO2are 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 TiO2follows a pseudo-second order with a maximum adsorption capacity of 42.85 mg/g. This study shows that functionalized-CNTs loaded TiO2has considerable potential as an adsorbent material due to the short adsorption time required to achieve equilibrium.
authors.affiliation: School of Fundamental Science, Universiti Malaysia Terengganu, 21030, Terengganu, Malaysia.
authors.forename: Amirah
authors.initials: A
authors.lastname: Ahmad
authors.affiliation: School of Fundamental Science, Universiti Malaysia Terengganu, 21030, Terengganu, Malaysia.
authors.forename: Mohd Hasmizam
authors.initials: MH
authors.lastname: Razali
authors.affiliation: School of Fundamental Science, Universiti Malaysia Terengganu, 21030, Terengganu, Malaysia.
authors.forename: Mazidah
authors.initials: M
authors.lastname: Mamat
authors.affiliation: School of Fundamental Science, Universiti Malaysia Terengganu, 21030, Terengganu, Malaysia.
authors.forename: Faizatul Shimal Binti
authors.initials: FSB
authors.lastname: Mehamod
authors.affiliation: School of Fundamental Science, Universiti Malaysia Terengganu, 21030, Terengganu, Malaysia. Electronic address: kerol@umt.edu.my.
authors.forename: Khairul
authors.initials: K
authors.lastname: Anuar Mat Amin
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000032:analysis; D007220:Industrial Waste / Q000032:analysis; D053761:Nanocomposites / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011437:Propylamines / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D007220:Industrial Waste; D037742:Nanotubes, Carbon; D011437:Propylamines; D012821:Silanes; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C100258:methyl orange; D014025:Titanium; C477625:amino-propyl-triethoxysilane
keywords: Adsorption; Catalyst; Methyl orange; Multi-walled carbon nanotubes; Titanium dioxide