eprintid: 9548
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/95/48
datestamp: 2023-11-09 16:36:11
lastmod: 2023-11-09 16:36:11
status_changed: 2023-11-09 16:29:15
type: article
metadata_visibility: show
creators_name: Zulfiqar, M.
creators_name: Chowdhury, S.
creators_name: Sufian, S.
creators_name: Omar, A.A.
title: Enhanced photocatalytic activity of Orange II in aqueous solution using solvent-based TiO2 nanotubes: Kinetic, equilibrium and thermodynamic studies
ispublished: pub
keywords: Activation energy; Citrus fruits; Degradation; Dyes; Free energy; Isotherms; Kinetic theory; Kinetics; Mechanisms; Nanotubes; Photocatalysis; Solvents; Titanium dioxide; Wastewater treatment; Yarn, Langmuir isotherm models; Orange II; Photo catalytic degradation; Photocatalytic activities; Photocatalytic degradation of Orange II; Pseudo second order kinetics; Pseudo-first order kinetic model; TiO2 nanotubes, Solutions
note: cited By 48
abstract: The systematic analysis of different organic solvents influence on the morphology of TiO2 nanotubes (TNTs) via hydrothermal synthetic route with the addition of alkaline solution and commercial TiO2 nanoparticles is performed through characterizations. The photocatalytic activity of TNTs was investigated by degradation of Orange II aqueous solution under UV-light irradiation. The degradation kinetic data was modelled in pseudo-first order and pseudo-second order kinetics equations which reveal that degradation onto TNTs followed pseudo-first order kinetic model with correlation coefficient more than 0.99. Furthermore, the equilibrium data of Orange II onto TNTs was analyzed using Langmuir, Freundlich and Temkin isotherm models suggesting that Langmuir isotherm model provides excellent correlation of the experimental data with maximum degradation capacity of 15.726 mg/g. The activation energy was found to be 24.48 kJ/mol, suggesting that photocatalytic degradation follows physisorption mechanism. Thermodynamic parameters: enthalpy (�H°) was 44.175 kJ mol�1, entropy (�S°) was 159.850 Jmol�1K�1 and the values of Gibb's free energy (�G°) were �47.592, �49.988 and �52.386 kJ mol�1 at 298, 313 and 328 K, respectively, suggesting spontaneous and endothermic process. The rise in temperature was found to be more feasible and favorable for photocatalytic degradation of Orange II onto TNTs. Thus, based on present research, solvent-based TNTs would be promising candidates for wastewater treatment. © 2018 Elsevier Ltd
date: 2018
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052882917&doi=10.1016%2fj.jclepro.2018.08.324&partnerID=40&md5=1782076966a755aabd88a2466ce35303
id_number: 10.1016/j.jclepro.2018.08.324
full_text_status: none
publication: Journal of Cleaner Production
volume: 203
pagerange: 848-859
refereed: TRUE
issn: 09596526
citation:   Zulfiqar, M. and Chowdhury, S. and Sufian, S. and Omar, A.A.  (2018) Enhanced photocatalytic activity of Orange II in aqueous solution using solvent-based TiO2 nanotubes: Kinetic, equilibrium and thermodynamic studies.  Journal of Cleaner Production, 203.  pp. 848-859.  ISSN 09596526