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n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties
In this study, ZnO nanorods (NRs) were hydrothermally grown on an Au-coated glass substrate at a relatively low temperature (90 °C), followed by the deposition of Ag(2)CrO(4) particles via a successive ionic layer adsorption and reaction (SILAR) route. The content of the Ag(2)CrO(4) particles on ZnO...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9061352/ https://www.ncbi.nlm.nih.gov/pubmed/35521157 http://dx.doi.org/10.1039/c9ra00639g |
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author | Pirhashemi, Mahsa Elhag, Sami Adam, Rania E. Habibi-Yangjeh, Aziz Liu, Xianjie Willander, Magnus Nur, Omer |
author_facet | Pirhashemi, Mahsa Elhag, Sami Adam, Rania E. Habibi-Yangjeh, Aziz Liu, Xianjie Willander, Magnus Nur, Omer |
author_sort | Pirhashemi, Mahsa |
collection | PubMed |
description | In this study, ZnO nanorods (NRs) were hydrothermally grown on an Au-coated glass substrate at a relatively low temperature (90 °C), followed by the deposition of Ag(2)CrO(4) particles via a successive ionic layer adsorption and reaction (SILAR) route. The content of the Ag(2)CrO(4) particles on ZnO NRs was controlled by changing the number of SILAR cycles. The fabricated ZnO–Ag(2)CrO(4) heterojunction photoelectrodes were subjected to morphological, structural, compositional, and optical property analyses; their photoelectrochemical (PEC) properties were investigated under simulated solar light illumination. The photocurrent responses confirmed that the ability of the ZnO–Ag(2)CrO(4) heterojunction photoelectrodes to separate the photo-generated electron–hole pairs is stronger than that of bare ZnO NRs. Impressively, the maximum photocurrent density of about 2.51 mA cm(−2) at 1.23 V (vs. Ag/AgCl) was measured for the prepared ZnO–Ag(2)CrO(4) photoelectrode with 8 SILAR cycles (denoted as ZnO–Ag(2)CrO(4)-8), which exhibited about 3-fold photo-enhancement in the current density as compared to bare ZnO NRs (0.87 mA cm(−2)) under similar conditions. The improvement in photoactivity was attributed to the ideal band gap and high absorption coefficient of the Ag(2)CrO(4) particles, which resulted in improved solar light absorption properties. Furthermore, an appropriate annealing treatment was proven to be an efficient process to increase the crystallinity of Ag(2)CrO(4) particles deposited on ZnO NRs, which improved the charge transport characteristics of the ZnO–Ag(2)CrO(4)-8 photoelectrode annealed at 200 °C and increased the performance of the photoelectrode. The results achieved in the present work present new insights for designing n–n heterojunction photoelectrodes for efficient and cost-effective PEC applications and solar-to-fuel energy conversions. |
format | Online Article Text |
id | pubmed-9061352 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90613522022-05-04 n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties Pirhashemi, Mahsa Elhag, Sami Adam, Rania E. Habibi-Yangjeh, Aziz Liu, Xianjie Willander, Magnus Nur, Omer RSC Adv Chemistry In this study, ZnO nanorods (NRs) were hydrothermally grown on an Au-coated glass substrate at a relatively low temperature (90 °C), followed by the deposition of Ag(2)CrO(4) particles via a successive ionic layer adsorption and reaction (SILAR) route. The content of the Ag(2)CrO(4) particles on ZnO NRs was controlled by changing the number of SILAR cycles. The fabricated ZnO–Ag(2)CrO(4) heterojunction photoelectrodes were subjected to morphological, structural, compositional, and optical property analyses; their photoelectrochemical (PEC) properties were investigated under simulated solar light illumination. The photocurrent responses confirmed that the ability of the ZnO–Ag(2)CrO(4) heterojunction photoelectrodes to separate the photo-generated electron–hole pairs is stronger than that of bare ZnO NRs. Impressively, the maximum photocurrent density of about 2.51 mA cm(−2) at 1.23 V (vs. Ag/AgCl) was measured for the prepared ZnO–Ag(2)CrO(4) photoelectrode with 8 SILAR cycles (denoted as ZnO–Ag(2)CrO(4)-8), which exhibited about 3-fold photo-enhancement in the current density as compared to bare ZnO NRs (0.87 mA cm(−2)) under similar conditions. The improvement in photoactivity was attributed to the ideal band gap and high absorption coefficient of the Ag(2)CrO(4) particles, which resulted in improved solar light absorption properties. Furthermore, an appropriate annealing treatment was proven to be an efficient process to increase the crystallinity of Ag(2)CrO(4) particles deposited on ZnO NRs, which improved the charge transport characteristics of the ZnO–Ag(2)CrO(4)-8 photoelectrode annealed at 200 °C and increased the performance of the photoelectrode. The results achieved in the present work present new insights for designing n–n heterojunction photoelectrodes for efficient and cost-effective PEC applications and solar-to-fuel energy conversions. The Royal Society of Chemistry 2019-03-11 /pmc/articles/PMC9061352/ /pubmed/35521157 http://dx.doi.org/10.1039/c9ra00639g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Pirhashemi, Mahsa Elhag, Sami Adam, Rania E. Habibi-Yangjeh, Aziz Liu, Xianjie Willander, Magnus Nur, Omer n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
title | n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
title_full | n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
title_fullStr | n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
title_full_unstemmed | n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
title_short | n–n ZnO–Ag(2)CrO(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
title_sort | n–n zno–ag(2)cro(4) heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9061352/ https://www.ncbi.nlm.nih.gov/pubmed/35521157 http://dx.doi.org/10.1039/c9ra00639g |
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