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Title: Hydrothermal synthesized magnetically separable mesostructured H2Ti3O7/γ-Fe2O3 nanocomposite for organic dye removal via adsorption and its regeneration/reuse through synergistic non-radiation driven H2O2 activation
Authors: Harsha, N
Manu Jose
Sriram, K
Shukla, S
Keywords: Adsorption
Reactive oxygen species
Isotherm Kinetics
Magnetic separation
Issue Date: 14-Feb-2018
Publisher: Elsevier
Citation: Environmental Science and Pollution Research, 25:20304-20319
Abstract: Hydrogen titanate (H2Ti3O7) nanotubes/nanosheets (HTN) are emerging class of adsorbent material which possess unique property of activating hydrogen peroxide (H2O2) to generate the reactive oxygen species (ROS), such as superoxide radical ions (O2.−) and hydroxyl radicals (·OH), effective in the decomposition of surface-adsorbed dye. However, HTN are non-magnetic which create hurdle in their effective separation from the treated aqueous solution. To overcome this issue, magnetic nanocomposites (HTNF) composed of HTN and maghemite (γ-Fe2O3) nanoparticles have been processed by subjecting the core–shell magnetic photocatalyst consisting of γ-Fe2O3/silica (SiO2)/titania (TiO2), having varying amounts of TiO2 in the shell to the hydrothermal conditions. HTNF-5 magnetic nanocomposite consisting of 31 wt% H2Ti3O7, typically having nanotube morphology with the highest specific surface area (133 m2 g−1) and pore-volume (0.22 cm3 g−1), exhibits the highest capacity (74 mg g−1) for the adsorption of cationic methylene blue (MB) dye from an aqueous solution involving the electrostatic attraction
Appears in Collections:2018

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