Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1149/1945-7111/ac0ec5 http://hdl.handle.net/11449/233302 |
Resumo: | The development of an effective cocatalyst for the modification of TiO2 arrays has become highly desirable for the improvement of their photoelectrocatalytic properties. We investigated the modification of TiO2 with nickel-based cocatalysts (nickel (Ni0), nickel oxide (NiO), and nickel sulphide (NiS)) by electrochemical deposition. The formation of n-p heterojunctions for the Ti/TiO2/NiO and Ti/TiO2/NiS and the generation of Schottky-type barrier for the Ti/TiO2/Ni0 led to the enhancement of visible light absorption and the reduction of the band gap energy, contributing significantly to improving the electrogeneration of the electron-hole and lifetime of the holes. The Ti/TiO2/NiS photocurrent was found to be almost two times higher than that of the Ti/TiO2 (5.39 mA.cm-2 at +1.50 V); this result was attributed to the excellent distribution of the cocatalyst around the TiO2 nanotube walls, which helped enhance the chemical interaction on the TiO2/NiS interface. Under optimized conditions (+0.50 V and UV-vis irradiation), the application of the Ti/TiO2/NiS electrode for the photoelectrocatalytic treatment of penicillin-G - (PG) (10 mg l-1) resulted in complete removal and mineralization after 60 min at pH 7. The results showed that one can potentially increase the photoelectrocatalytic efficiency of Ti/TiO2 through a simple modification of the material. |
id |
UNSP_703fbb4f049eb0374b7344f4dc007b87 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/233302 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin GThe development of an effective cocatalyst for the modification of TiO2 arrays has become highly desirable for the improvement of their photoelectrocatalytic properties. We investigated the modification of TiO2 with nickel-based cocatalysts (nickel (Ni0), nickel oxide (NiO), and nickel sulphide (NiS)) by electrochemical deposition. The formation of n-p heterojunctions for the Ti/TiO2/NiO and Ti/TiO2/NiS and the generation of Schottky-type barrier for the Ti/TiO2/Ni0 led to the enhancement of visible light absorption and the reduction of the band gap energy, contributing significantly to improving the electrogeneration of the electron-hole and lifetime of the holes. The Ti/TiO2/NiS photocurrent was found to be almost two times higher than that of the Ti/TiO2 (5.39 mA.cm-2 at +1.50 V); this result was attributed to the excellent distribution of the cocatalyst around the TiO2 nanotube walls, which helped enhance the chemical interaction on the TiO2/NiS interface. Under optimized conditions (+0.50 V and UV-vis irradiation), the application of the Ti/TiO2/NiS electrode for the photoelectrocatalytic treatment of penicillin-G - (PG) (10 mg l-1) resulted in complete removal and mineralization after 60 min at pH 7. The results showed that one can potentially increase the photoelectrocatalytic efficiency of Ti/TiO2 through a simple modification of the material.National Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances (INCT-DATREM) Institute of Chemistry São Paulo State University, São PauloNational Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances (INCT-DATREM) Institute of Chemistry São Paulo State University, São PauloUniversidade Estadual Paulista (UNESP)Sayao, Fabiana Avolio [UNESP]Martins, Alysson Stefan [UNESP]Da Silva, Josiel José [UNESP]Boldrin Zanoni, Maria Valnice [UNESP]2022-05-01T06:31:27Z2022-05-01T06:31:27Z2021-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1149/1945-7111/ac0ec5Journal of the Electrochemical Society, v. 168, n. 7, 2021.1945-71110013-4651http://hdl.handle.net/11449/23330210.1149/1945-7111/ac0ec52-s2.0-85111137142Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Electrochemical Societyinfo:eu-repo/semantics/openAccess2022-05-01T06:31:27Zoai:repositorio.unesp.br:11449/233302Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:57:24.198066Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
title |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
spellingShingle |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G Sayao, Fabiana Avolio [UNESP] |
title_short |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
title_full |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
title_fullStr |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
title_full_unstemmed |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
title_sort |
Evaluation of Ni0, NiO, and NiS as a Cocatalyst Modifier on TiO2Nanotubes Matrix for the Enhancement of Photoelectrocatalytic Oxidation of Penicillin G |
author |
Sayao, Fabiana Avolio [UNESP] |
author_facet |
Sayao, Fabiana Avolio [UNESP] Martins, Alysson Stefan [UNESP] Da Silva, Josiel José [UNESP] Boldrin Zanoni, Maria Valnice [UNESP] |
author_role |
author |
author2 |
Martins, Alysson Stefan [UNESP] Da Silva, Josiel José [UNESP] Boldrin Zanoni, Maria Valnice [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Sayao, Fabiana Avolio [UNESP] Martins, Alysson Stefan [UNESP] Da Silva, Josiel José [UNESP] Boldrin Zanoni, Maria Valnice [UNESP] |
description |
The development of an effective cocatalyst for the modification of TiO2 arrays has become highly desirable for the improvement of their photoelectrocatalytic properties. We investigated the modification of TiO2 with nickel-based cocatalysts (nickel (Ni0), nickel oxide (NiO), and nickel sulphide (NiS)) by electrochemical deposition. The formation of n-p heterojunctions for the Ti/TiO2/NiO and Ti/TiO2/NiS and the generation of Schottky-type barrier for the Ti/TiO2/Ni0 led to the enhancement of visible light absorption and the reduction of the band gap energy, contributing significantly to improving the electrogeneration of the electron-hole and lifetime of the holes. The Ti/TiO2/NiS photocurrent was found to be almost two times higher than that of the Ti/TiO2 (5.39 mA.cm-2 at +1.50 V); this result was attributed to the excellent distribution of the cocatalyst around the TiO2 nanotube walls, which helped enhance the chemical interaction on the TiO2/NiS interface. Under optimized conditions (+0.50 V and UV-vis irradiation), the application of the Ti/TiO2/NiS electrode for the photoelectrocatalytic treatment of penicillin-G - (PG) (10 mg l-1) resulted in complete removal and mineralization after 60 min at pH 7. The results showed that one can potentially increase the photoelectrocatalytic efficiency of Ti/TiO2 through a simple modification of the material. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-07-01 2022-05-01T06:31:27Z 2022-05-01T06:31:27Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1149/1945-7111/ac0ec5 Journal of the Electrochemical Society, v. 168, n. 7, 2021. 1945-7111 0013-4651 http://hdl.handle.net/11449/233302 10.1149/1945-7111/ac0ec5 2-s2.0-85111137142 |
url |
http://dx.doi.org/10.1149/1945-7111/ac0ec5 http://hdl.handle.net/11449/233302 |
identifier_str_mv |
Journal of the Electrochemical Society, v. 168, n. 7, 2021. 1945-7111 0013-4651 10.1149/1945-7111/ac0ec5 2-s2.0-85111137142 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Electrochemical Society |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128585692610560 |