High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution
The effects and mechanism of high-temperature annealing, a frequently-used strategy to modulate the properties of nanoparticles (NPs), on the dissolution of zinc oxide (ZnO) NPs are investigated in this study. The results show that annealing increases the ZnO NPs dissolution magnitude via increasing...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/105676 http://hdl.handle.net/10220/49540 http://dx.doi.org/10.1016/j.envint.2019.104930 |
| _version_ | 1811685806950055936 |
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| author | He, Hongping Cao, Jianglin Fei, Xunchang Duan, Ning |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering He, Hongping Cao, Jianglin Fei, Xunchang Duan, Ning |
| author_sort | He, Hongping |
| collection | NTU |
| description | The effects and mechanism of high-temperature annealing, a frequently-used strategy to modulate the properties of nanoparticles (NPs), on the dissolution of zinc oxide (ZnO) NPs are investigated in this study. The results show that annealing increases the ZnO NPs dissolution magnitude via increasing O vacancy abundance on the surface and in the bulk crystal. The face-dependent distribution of O vacancy is revealed by characterizing ZnO single crystal, and the (000-1) face has a higher abundance than the (10-10) face. Particularly, O vacancy abundance in the bulk (000-1) is about 3 times higher than in the bulk (10-10). Annealing further strengthens the face-dependence of O vacancy distribution, therefore both raw and annealed (000-1) faces contribute dominantly to the dissolution of ZnO NPs. Typical topographies of the surface defect sites on the (000-1) face and their evolutions during dissolution are collected. Annealing promotes the formation of larger and deeper etching pits. Elevated solution temperature and annealing synergize to further accelerate ZnO dissolution. The dissolution behaviors of ZnO NPs with different annealing statuses, surface properties, and solution temperatures investigated in this study have potential implications to the evaluations of environmental fate and risk of metal oxide NPs. |
| first_indexed | 2024-10-01T04:50:23Z |
| format | Journal Article |
| id | ntu-10356/105676 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:50:23Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1056762019-12-06T21:55:40Z High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution He, Hongping Cao, Jianglin Fei, Xunchang Duan, Ning School of Civil and Environmental Engineering Engineering::Environmental engineering Metal Oxide Nanoparticles The effects and mechanism of high-temperature annealing, a frequently-used strategy to modulate the properties of nanoparticles (NPs), on the dissolution of zinc oxide (ZnO) NPs are investigated in this study. The results show that annealing increases the ZnO NPs dissolution magnitude via increasing O vacancy abundance on the surface and in the bulk crystal. The face-dependent distribution of O vacancy is revealed by characterizing ZnO single crystal, and the (000-1) face has a higher abundance than the (10-10) face. Particularly, O vacancy abundance in the bulk (000-1) is about 3 times higher than in the bulk (10-10). Annealing further strengthens the face-dependence of O vacancy distribution, therefore both raw and annealed (000-1) faces contribute dominantly to the dissolution of ZnO NPs. Typical topographies of the surface defect sites on the (000-1) face and their evolutions during dissolution are collected. Annealing promotes the formation of larger and deeper etching pits. Elevated solution temperature and annealing synergize to further accelerate ZnO dissolution. The dissolution behaviors of ZnO NPs with different annealing statuses, surface properties, and solution temperatures investigated in this study have potential implications to the evaluations of environmental fate and risk of metal oxide NPs. Published version 2019-08-05T09:10:36Z 2019-12-06T21:55:39Z 2019-08-05T09:10:36Z 2019-12-06T21:55:39Z 2019 Journal Article He, H., Cao, J., Fei, X., & Duan, N. (2019). High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution. Environment International, 130, 104930-. doi:10.1016/j.envint.2019.104930 0160-4120 https://hdl.handle.net/10356/105676 http://hdl.handle.net/10220/49540 http://dx.doi.org/10.1016/j.envint.2019.104930 en Environment International © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/). 9 p. application/pdf |
| spellingShingle | Engineering::Environmental engineering Metal Oxide Nanoparticles He, Hongping Cao, Jianglin Fei, Xunchang Duan, Ning High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution |
| title | High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution |
| title_full | High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution |
| title_fullStr | High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution |
| title_full_unstemmed | High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution |
| title_short | High-temperature annealing of ZnO nanoparticles increases the dissolution magnitude and rate in water by altering O vacancy distribution |
| title_sort | high temperature annealing of zno nanoparticles increases the dissolution magnitude and rate in water by altering o vacancy distribution |
| topic | Engineering::Environmental engineering Metal Oxide Nanoparticles |
| url | https://hdl.handle.net/10356/105676 http://hdl.handle.net/10220/49540 http://dx.doi.org/10.1016/j.envint.2019.104930 |
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