TY  - JOUR
EP  - 859
SN  - 09596526
PB  - Elsevier Ltd
N1  - cited By 48
SP  - 848
TI  - Enhanced photocatalytic activity of Orange II in aqueous solution using solvent-based TiO2 nanotubes: Kinetic, equilibrium and thermodynamic studies
AV  - none
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052882917&doi=10.1016%2fj.jclepro.2018.08.324&partnerID=40&md5=1782076966a755aabd88a2466ce35303
JF  - Journal of Cleaner Production
A1  - Zulfiqar, M.
A1  - Chowdhury, S.
A1  - Sufian, S.
A1  - Omar, A.A.
VL  - 203
Y1  - 2018///
N2  - 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 (Î?H°) was 44.175 kJ molâ??1, entropy (Î?S°) was 159.850 Jmolâ??1Kâ??1 and the values of Gibb's free energy (Î?G°) were â??47.592, â??49.988 and â??52.386 kJ molâ??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
KW  - Activation energy; Citrus fruits; Degradation; Dyes; Free energy; Isotherms; Kinetic theory; Kinetics; Mechanisms; Nanotubes; Photocatalysis; Solvents; Titanium dioxide; Wastewater treatment; Yarn
KW  -  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
KW  -  Solutions
ID  - scholars9548
ER  -