Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation

The different morphologies of K-doped ZnO nanostructures were successfully synthesized by a facile one-step electrochemical method using control of the current density. Field emission electron microscope images showed various morphologies and aspect ratios due to change in the value of applied curre...

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Main Authors: Rouhi, J., Kakooei, S., Sadeghzadeh, S.M., Rouhi, O., Karimzadeh, R.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23395 /
Published: Springer 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086344432&doi=10.1007%2fs10008-020-04695-y&partnerID=40&md5=a44355616e18dbab9432d186cdbe660b
http://eprints.utp.edu.my/23395/
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spelling utp-eprints.233952021-08-19T07:22:44Z Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation Rouhi, J. Kakooei, S. Sadeghzadeh, S.M. Rouhi, O. Karimzadeh, R. The different morphologies of K-doped ZnO nanostructures were successfully synthesized by a facile one-step electrochemical method using control of the current density. Field emission electron microscope images showed various morphologies and aspect ratios due to change in the value of applied current densities. Photoluminescence and UV-visible spectrometers showed that change in current densities leads in different level of defects and band gap shifting. The photocurrent responses reveal that the photocurrent intensity increases as K-doped ZnO surface morphology tends to taper on the application of 0.5 mA cm�2 current density. The maximum degradation rate of methylene blue was attained to be 99.3 within the 60 min using K-doped ZnO nanotapers which was much higher than the values found in previous studies. The highest photocatalytic H2 evolution activities were obtained in the applied current density of 0.5 mA cm�2 in comparison to other samples. These results indicate that doping and controllable morphology are effective and facile methods to improve the photocatalytic features of ZnO by boosting the absorption of light. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature. Springer 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086344432&doi=10.1007%2fs10008-020-04695-y&partnerID=40&md5=a44355616e18dbab9432d186cdbe660b Rouhi, J. and Kakooei, S. and Sadeghzadeh, S.M. and Rouhi, O. and Karimzadeh, R. (2020) Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation. Journal of Solid State Electrochemistry, 24 (7). pp. 1599-1606. http://eprints.utp.edu.my/23395/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The different morphologies of K-doped ZnO nanostructures were successfully synthesized by a facile one-step electrochemical method using control of the current density. Field emission electron microscope images showed various morphologies and aspect ratios due to change in the value of applied current densities. Photoluminescence and UV-visible spectrometers showed that change in current densities leads in different level of defects and band gap shifting. The photocurrent responses reveal that the photocurrent intensity increases as K-doped ZnO surface morphology tends to taper on the application of 0.5 mA cm�2 current density. The maximum degradation rate of methylene blue was attained to be 99.3 within the 60 min using K-doped ZnO nanotapers which was much higher than the values found in previous studies. The highest photocatalytic H2 evolution activities were obtained in the applied current density of 0.5 mA cm�2 in comparison to other samples. These results indicate that doping and controllable morphology are effective and facile methods to improve the photocatalytic features of ZnO by boosting the absorption of light. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
format Article
author Rouhi, J.
Kakooei, S.
Sadeghzadeh, S.M.
Rouhi, O.
Karimzadeh, R.
spellingShingle Rouhi, J.
Kakooei, S.
Sadeghzadeh, S.M.
Rouhi, O.
Karimzadeh, R.
Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
author_sort Rouhi, J.
title Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
title_short Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
title_full Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
title_fullStr Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
title_full_unstemmed Highly efficient photocatalytic performance of dye-sensitized K-doped ZnO nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
title_sort highly efficient photocatalytic performance of dye-sensitized k-doped zno nanotapers synthesized by a facile one-step electrochemical method for quantitative hydrogen generation
publisher Springer
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086344432&doi=10.1007%2fs10008-020-04695-y&partnerID=40&md5=a44355616e18dbab9432d186cdbe660b
http://eprints.utp.edu.my/23395/
_version_ 1741196669074014208
score 11.62408

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