Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis
Semiconducting zinc oxide nanoparticles (ZnO NPs) hold great potential as photocatalysts in wastewater treatment because of their favorable bandgap and cost-effectiveness. Unfortunately, ZnO NPs usually show rapid charge recombination that limits their photocatalytic efficacy significantly. Herein,...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
ACADEMIC PRESS INC ELSEVIER SCIENCE
2022
|
| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/DP200103332 http://hdl.handle.net/20.500.11937/91547 |
| _version_ | 1848765544155578368 |
|---|---|
| author | Fatima, Hira Azhar, Muhammad Rizwan Zhong, Yijun Arafat, Yasir Khiadani, M. Shao, Zongping |
| author_facet | Fatima, Hira Azhar, Muhammad Rizwan Zhong, Yijun Arafat, Yasir Khiadani, M. Shao, Zongping |
| author_sort | Fatima, Hira |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Semiconducting zinc oxide nanoparticles (ZnO NPs) hold great potential as photocatalysts in wastewater treatment because of their favorable bandgap and cost-effectiveness. Unfortunately, ZnO NPs usually show rapid charge recombination that limits their photocatalytic efficacy significantly. Herein, we report a facile way of modifying ZnO NPs with zeolite imidazole framework-8 (ZIF8). A synergy between the two components may tackle the drawback of fast charge recombination for pristine ZnO NPs. Improved performance of photocatalytic degradation of methylene blue (MB) is confirmed by comparing with pristine ZnO and ZIF8 as the catalysts. The ZIF8 in the composite serves as a trap for photogenerated electrons, thus reducing the rate of charge recombination to enhance the photocatalysis rate. In addition, the hybridization process suppresses the aggregation of ZnO NPs, providing a large surface area and a greater number of active sites. Moreover, a small shift in the absorption band of ZnO@ZIF8 (10) NPs towards higher wavelength, also witnessed a little contribution towards enhanced photocatalytic properties. Mechanistic studies of the photocatalytic process of MB using ZnO@ZIF8 NPs catalyst reveal that hydroxyl radicals are the major reactive oxygen species. The facile hybridization of ZnO with ZIF8 provides a strategy for developing new photocatalysts with wide application potential. |
| first_indexed | 2025-11-14T11:36:56Z |
| format | Journal Article |
| id | curtin-20.500.11937-91547 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:36:56Z |
| publishDate | 2022 |
| publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-915472024-01-24T00:12:22Z Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis Fatima, Hira Azhar, Muhammad Rizwan Zhong, Yijun Arafat, Yasir Khiadani, M. Shao, Zongping Science & Technology Physical Sciences Chemistry, Physical Chemistry Semiconductor-zeolite imidazole nanoparticle Photocatalyst Photocatalysis Charge recombination Wastewater treatment VISIBLE-LIGHT METHYLENE-BLUE OXYGEN VACANCY DEGRADATION NANORODS ZIF-8 HETEROSTRUCTURES COMPOSITES SURFACE Charge recombination Photocatalysis Photocatalyst Semiconductor-zeolite imidazole nanoparticle Wastewater treatment Imidazoles Nanoparticles Recombination, Genetic Zeolites Zinc Oxide Zeolites Zinc Oxide Imidazoles Recombination, Genetic Nanoparticles Semiconducting zinc oxide nanoparticles (ZnO NPs) hold great potential as photocatalysts in wastewater treatment because of their favorable bandgap and cost-effectiveness. Unfortunately, ZnO NPs usually show rapid charge recombination that limits their photocatalytic efficacy significantly. Herein, we report a facile way of modifying ZnO NPs with zeolite imidazole framework-8 (ZIF8). A synergy between the two components may tackle the drawback of fast charge recombination for pristine ZnO NPs. Improved performance of photocatalytic degradation of methylene blue (MB) is confirmed by comparing with pristine ZnO and ZIF8 as the catalysts. The ZIF8 in the composite serves as a trap for photogenerated electrons, thus reducing the rate of charge recombination to enhance the photocatalysis rate. In addition, the hybridization process suppresses the aggregation of ZnO NPs, providing a large surface area and a greater number of active sites. Moreover, a small shift in the absorption band of ZnO@ZIF8 (10) NPs towards higher wavelength, also witnessed a little contribution towards enhanced photocatalytic properties. Mechanistic studies of the photocatalytic process of MB using ZnO@ZIF8 NPs catalyst reveal that hydroxyl radicals are the major reactive oxygen species. The facile hybridization of ZnO with ZIF8 provides a strategy for developing new photocatalysts with wide application potential. 2022 Journal Article http://hdl.handle.net/20.500.11937/91547 10.1016/j.jcis.2022.01.086 English http://purl.org/au-research/grants/arc/DP200103332 http://purl.org/au-research/grants/arc/DP200103315 http://creativecommons.org/licenses/by-nc-nd/4.0/ ACADEMIC PRESS INC ELSEVIER SCIENCE fulltext |
| spellingShingle | Science & Technology Physical Sciences Chemistry, Physical Chemistry Semiconductor-zeolite imidazole nanoparticle Photocatalyst Photocatalysis Charge recombination Wastewater treatment VISIBLE-LIGHT METHYLENE-BLUE OXYGEN VACANCY DEGRADATION NANORODS ZIF-8 HETEROSTRUCTURES COMPOSITES SURFACE Charge recombination Photocatalysis Photocatalyst Semiconductor-zeolite imidazole nanoparticle Wastewater treatment Imidazoles Nanoparticles Recombination, Genetic Zeolites Zinc Oxide Zeolites Zinc Oxide Imidazoles Recombination, Genetic Nanoparticles Fatima, Hira Azhar, Muhammad Rizwan Zhong, Yijun Arafat, Yasir Khiadani, M. Shao, Zongping Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| title | Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| title_full | Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| title_fullStr | Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| title_full_unstemmed | Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| title_short | Rational design of ZnO-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| title_sort | rational design of zno-zeolite imidazole hybrid nanoparticles with reduced charge recombination for enhanced photocatalysis |
| topic | Science & Technology Physical Sciences Chemistry, Physical Chemistry Semiconductor-zeolite imidazole nanoparticle Photocatalyst Photocatalysis Charge recombination Wastewater treatment VISIBLE-LIGHT METHYLENE-BLUE OXYGEN VACANCY DEGRADATION NANORODS ZIF-8 HETEROSTRUCTURES COMPOSITES SURFACE Charge recombination Photocatalysis Photocatalyst Semiconductor-zeolite imidazole nanoparticle Wastewater treatment Imidazoles Nanoparticles Recombination, Genetic Zeolites Zinc Oxide Zeolites Zinc Oxide Imidazoles Recombination, Genetic Nanoparticles |
| url | http://purl.org/au-research/grants/arc/DP200103332 http://purl.org/au-research/grants/arc/DP200103332 http://hdl.handle.net/20.500.11937/91547 |