Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field

The piezoelectric effect, which can promote photocatalytic degradation of pollutants, has attracted great attention. However, the effect of hydrodynamic factors on the performance is still unclear in the water-driven piezo-enhanced photocatalytic process. Herein, ZnO nanorod array on porous substrat...

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Main Authors: Wen, Yingying, Chen, Juan, Gao, Xin, Che, Huinan, Wang, Peifang, Liu, Bin, Ao, Yanhui
Other Authors: School of Chemistry, Chemical Engineering and Biotechnology
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/172392
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1723922024-02-21T07:38:12Z Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field Wen, Yingying Chen, Juan Gao, Xin Che, Huinan Wang, Peifang Liu, Bin Ao, Yanhui School of Chemistry, Chemical Engineering and Biotechnology School of Chemical and Biomedical Engineering School of Physical and Mathematical Sciences Engineering Piezoelectric Effect Dynamic Water The piezoelectric effect, which can promote photocatalytic degradation of pollutants, has attracted great attention. However, the effect of hydrodynamic factors on the performance is still unclear in the water-driven piezo-enhanced photocatalytic process. Herein, ZnO nanorod array on porous substrate was employed to study the effect of hydrodynamic factors on piezo-assisted photocatalysis. Flow field simulation analysis based on computational fluid dynamics (CFD) indicates that velocity notably affects the piezo-photocatalytic process. Meanwhile, the porous structure of substrate promotes the formation of micro-turbulence, which also significantly improve the piezopotential of ZnO and further enhance the catalytic performance. Density functional theory (DFT) calculations further reveal the vulnerable sites attacked by reactive species, thereby proposing the possible degradation pathway of pollutant. This study illustrates the important role of hydrodynamic factors in piezo-photocatalytic process and provides a feasible way for in-situ purification of pollutants in urban sewerage and drainage. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) We are grateful for the grants from Natural Science Foundation of China (No. 51979081 and No. 52100179), Fundamental Research Funds for the Central Universities (No. B210202052), China Postdoctoral Science Foundation (No. 2020M680063 and No. 2021T140176), Ministry of Education of Singapore (Tier 1: RG4/20 and Tier 2: MOET2EP10120- 0002), Agency for Science, Technology and Research (AME IRG: A20E5c0080) and PAPD. 2023-12-12T02:35:20Z 2023-12-12T02:35:20Z 2022 Journal Article Wen, Y., Chen, J., Gao, X., Che, H., Wang, P., Liu, B. & Ao, Y. (2022). Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field. Nano Energy, 101, 107614-. https://dx.doi.org/10.1016/j.nanoen.2022.107614 2211-2855 https://hdl.handle.net/10356/172392 10.1016/j.nanoen.2022.107614 2-s2.0-85134822416 101 107614 en RG4/20 MOET2EP10120- 0002 AME IRG: A20E5c0080 Nano Energy © 2022 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Piezoelectric Effect
Dynamic Water
spellingShingle Engineering
Piezoelectric Effect
Dynamic Water
Wen, Yingying
Chen, Juan
Gao, Xin
Che, Huinan
Wang, Peifang
Liu, Bin
Ao, Yanhui
Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
description The piezoelectric effect, which can promote photocatalytic degradation of pollutants, has attracted great attention. However, the effect of hydrodynamic factors on the performance is still unclear in the water-driven piezo-enhanced photocatalytic process. Herein, ZnO nanorod array on porous substrate was employed to study the effect of hydrodynamic factors on piezo-assisted photocatalysis. Flow field simulation analysis based on computational fluid dynamics (CFD) indicates that velocity notably affects the piezo-photocatalytic process. Meanwhile, the porous structure of substrate promotes the formation of micro-turbulence, which also significantly improve the piezopotential of ZnO and further enhance the catalytic performance. Density functional theory (DFT) calculations further reveal the vulnerable sites attacked by reactive species, thereby proposing the possible degradation pathway of pollutant. This study illustrates the important role of hydrodynamic factors in piezo-photocatalytic process and provides a feasible way for in-situ purification of pollutants in urban sewerage and drainage.
author2 School of Chemistry, Chemical Engineering and Biotechnology
author_facet School of Chemistry, Chemical Engineering and Biotechnology
Wen, Yingying
Chen, Juan
Gao, Xin
Che, Huinan
Wang, Peifang
Liu, Bin
Ao, Yanhui
format Article
author Wen, Yingying
Chen, Juan
Gao, Xin
Che, Huinan
Wang, Peifang
Liu, Bin
Ao, Yanhui
author_sort Wen, Yingying
title Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
title_short Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
title_full Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
title_fullStr Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
title_full_unstemmed Piezo-enhanced photocatalytic performance of ZnO nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
title_sort piezo-enhanced photocatalytic performance of zno nanorod array for pollutants degradation in dynamic water: insight into the effect of velocity and inner flow field
publishDate 2023
url https://hdl.handle.net/10356/172392
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