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Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis

Hydrofluoric acid (HF) has beenwidely employed to regulate the surface characteristics of TiO2 containing sheetlike morphology with (001) facets for various environmental applications. However, carcinogenic effects associated with HF are the main stumbling blocks on its way towards global commercial...

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Main Authors: Zulfiqar, Muhammad, Sufian, Suriati, Rabat, Nurul Ekmi, Mansor, Nurlidia
Format: Article
Published: ELSEVIER 2020
Online Access:http://eprints.utp.edu.my/24323/
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spelling my.utp.eprints.243232021-08-27T05:15:49Z Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis Zulfiqar, Muhammad Sufian, Suriati Rabat, Nurul Ekmi Mansor, Nurlidia Hydrofluoric acid (HF) has beenwidely employed to regulate the surface characteristics of TiO2 containing sheetlike morphology with (001) facets for various environmental applications. However, carcinogenic effects associated with HF are the main stumbling blocks on its way towards global commercialization. In the same line of action, an eco-friendly approach for the synthesis of anatase TiO2 nanosheets (TNSs) via employing hydrothermal process and N, N dimethylformamide (DMF) as a novelmorphology-controlling agent has been reported. The asproduced TNSs were characterized by XRD, HRTEM, Raman, FTIR, XPS and DRS characterizations. The photoactivity of as-produced TNSs was studied for photocatalytic degradation of phenol under visible light irradiation in the presence of green oxidants such as hydrogen peroxide (H2O2) and ferric chloride (FeCl3) toproduce free hydroxyl radicals for speedily reduction of recombination of photogenerated electrons hole-pairs. The results revealed that as-produced TNSs could activate by green oxidants with yielding up to 94.19 and 97.12% phenol degradation in the presence of H2O2 and FeCl3, respectively. Moreover, phenol adsorption data was well explained via pseudo first order and pseudo second order kinetics while Langmuir and Freundlich isotherms were more suitable to explain the adsorption of phenol onto TNSs, providing maximum adsorption capacity up to 23.596 mg/g. Various thermodynamic parameters were evaluated, suggesting the favourable, spontaneous and endothermic adsorption process. The values of activation energy (18.505 kJ/mol) confirmed the physical adsorption of phenol onto TNSs. The excellent aptitude of anatase TNSs to produce hydroxyl radicals and superoxides radicals with promptly lessening of recombination of photogenerated electron hole-pairs makes them motivated applicant for wastewater treatment. (C) 2020 Published by Elsevier B.V. ELSEVIER 2020 Article NonPeerReviewed Zulfiqar, Muhammad and Sufian, Suriati and Rabat, Nurul Ekmi and Mansor, Nurlidia (2020) Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis. JOURNAL OF MOLECULAR LIQUIDS, 308 . http://eprints.utp.edu.my/24323/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description Hydrofluoric acid (HF) has beenwidely employed to regulate the surface characteristics of TiO2 containing sheetlike morphology with (001) facets for various environmental applications. However, carcinogenic effects associated with HF are the main stumbling blocks on its way towards global commercialization. In the same line of action, an eco-friendly approach for the synthesis of anatase TiO2 nanosheets (TNSs) via employing hydrothermal process and N, N dimethylformamide (DMF) as a novelmorphology-controlling agent has been reported. The asproduced TNSs were characterized by XRD, HRTEM, Raman, FTIR, XPS and DRS characterizations. The photoactivity of as-produced TNSs was studied for photocatalytic degradation of phenol under visible light irradiation in the presence of green oxidants such as hydrogen peroxide (H2O2) and ferric chloride (FeCl3) toproduce free hydroxyl radicals for speedily reduction of recombination of photogenerated electrons hole-pairs. The results revealed that as-produced TNSs could activate by green oxidants with yielding up to 94.19 and 97.12% phenol degradation in the presence of H2O2 and FeCl3, respectively. Moreover, phenol adsorption data was well explained via pseudo first order and pseudo second order kinetics while Langmuir and Freundlich isotherms were more suitable to explain the adsorption of phenol onto TNSs, providing maximum adsorption capacity up to 23.596 mg/g. Various thermodynamic parameters were evaluated, suggesting the favourable, spontaneous and endothermic adsorption process. The values of activation energy (18.505 kJ/mol) confirmed the physical adsorption of phenol onto TNSs. The excellent aptitude of anatase TNSs to produce hydroxyl radicals and superoxides radicals with promptly lessening of recombination of photogenerated electron hole-pairs makes them motivated applicant for wastewater treatment. (C) 2020 Published by Elsevier B.V.
format Article
author Zulfiqar, Muhammad
Sufian, Suriati
Rabat, Nurul Ekmi
Mansor, Nurlidia
spellingShingle Zulfiqar, Muhammad
Sufian, Suriati
Rabat, Nurul Ekmi
Mansor, Nurlidia
Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis
author_facet Zulfiqar, Muhammad
Sufian, Suriati
Rabat, Nurul Ekmi
Mansor, Nurlidia
author_sort Zulfiqar, Muhammad
title Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis
title_short Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis
title_full Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis
title_fullStr Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis
title_full_unstemmed Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis
title_sort photocatalytic degradation and adsorption of phenol by solvent-controlled tio2 nanosheets assisted with h2o2 and fecl3: kinetic, isotherm and thermodynamic analysis
publisher ELSEVIER
publishDate 2020
url http://eprints.utp.edu.my/24323/
_version_ 1738656594326978560
score 13.211869

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