Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392016000200446 |
Resumo: | A novel process was developed for the synthesis of a mixed phase (constituted of 66% anatase phase) of TiO2 nanoparticles at lower calcination temperature (400 oC) by the sol gel technique using a cost effective and easily available propanol solvent. Stereochemistry of propanol played a crucial role towards crystallographic phase of resultant TiO2nanoparticles where n-propanol gave mixed phase while i-propanol gave pure anatase. A plausible mechanism has been proposed. An effect of crystallographic phase on their photocatalytic activity was studied using degradation of bromophenol blue dye. The rate constants of the dye degradation reaction for anatase phase and mixed phase were found to be 6.86 x 10-3 /s and 1.56 x 10-2 /s respectively. A mixed phase of TiO2 showed faster (120 min for 84%) photodegradation compared to the anatase phase (270 min. for 84%) due to an effect of crystalline and electronic parameters. The cyclic voltammetry results depicted the reducing nature of i- TiO2than n-TiO2, which creates unfavorable situation for the electron transfer from TiO2 to dye. |
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Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced PhotoactivitySemiconductorNanoparticlesSol gel methodLow calcination temperaturePhotodegradationA novel process was developed for the synthesis of a mixed phase (constituted of 66% anatase phase) of TiO2 nanoparticles at lower calcination temperature (400 oC) by the sol gel technique using a cost effective and easily available propanol solvent. Stereochemistry of propanol played a crucial role towards crystallographic phase of resultant TiO2nanoparticles where n-propanol gave mixed phase while i-propanol gave pure anatase. A plausible mechanism has been proposed. An effect of crystallographic phase on their photocatalytic activity was studied using degradation of bromophenol blue dye. The rate constants of the dye degradation reaction for anatase phase and mixed phase were found to be 6.86 x 10-3 /s and 1.56 x 10-2 /s respectively. A mixed phase of TiO2 showed faster (120 min for 84%) photodegradation compared to the anatase phase (270 min. for 84%) due to an effect of crystalline and electronic parameters. The cyclic voltammetry results depicted the reducing nature of i- TiO2than n-TiO2, which creates unfavorable situation for the electron transfer from TiO2 to dye.ABM, ABC, ABPol2016-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392016000200446Materials Research v.19 n.2 2016reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-MR-2015-0692info:eu-repo/semantics/openAccessChaudhari,PraptiChaudhari,VijayMishra,Satyendraeng2016-04-01T00:00:00Zoai:scielo:S1516-14392016000200446Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2016-04-01T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
title |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
spellingShingle |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity Chaudhari,Prapti Semiconductor Nanoparticles Sol gel method Low calcination temperature Photodegradation |
title_short |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
title_full |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
title_fullStr |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
title_full_unstemmed |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
title_sort |
Low Temperature Synthesis of Mixed Phase Titania Nanoparticles with High Yield, its Mechanism and Enhanced Photoactivity |
author |
Chaudhari,Prapti |
author_facet |
Chaudhari,Prapti Chaudhari,Vijay Mishra,Satyendra |
author_role |
author |
author2 |
Chaudhari,Vijay Mishra,Satyendra |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Chaudhari,Prapti Chaudhari,Vijay Mishra,Satyendra |
dc.subject.por.fl_str_mv |
Semiconductor Nanoparticles Sol gel method Low calcination temperature Photodegradation |
topic |
Semiconductor Nanoparticles Sol gel method Low calcination temperature Photodegradation |
description |
A novel process was developed for the synthesis of a mixed phase (constituted of 66% anatase phase) of TiO2 nanoparticles at lower calcination temperature (400 oC) by the sol gel technique using a cost effective and easily available propanol solvent. Stereochemistry of propanol played a crucial role towards crystallographic phase of resultant TiO2nanoparticles where n-propanol gave mixed phase while i-propanol gave pure anatase. A plausible mechanism has been proposed. An effect of crystallographic phase on their photocatalytic activity was studied using degradation of bromophenol blue dye. The rate constants of the dye degradation reaction for anatase phase and mixed phase were found to be 6.86 x 10-3 /s and 1.56 x 10-2 /s respectively. A mixed phase of TiO2 showed faster (120 min for 84%) photodegradation compared to the anatase phase (270 min. for 84%) due to an effect of crystalline and electronic parameters. The cyclic voltammetry results depicted the reducing nature of i- TiO2than n-TiO2, which creates unfavorable situation for the electron transfer from TiO2 to dye. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392016000200446 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392016000200446 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-MR-2015-0692 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.19 n.2 2016 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212668025077760 |