Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots
Nowadays, increasing the risk for copper leaching into the drinking water in homes, hotels and schools has become unresolved issues all around the countries such as Canada, the United States, and Malaysia. The leaching of copper in tap water is due to a combination of acidic water, damaged pipes, an...
| Main Authors: | , , , , |
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| Format: | Article |
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Elsevier
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/87549/ |
| _version_ | 1848860456672821248 |
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| author | Ibrahim, Izwaharyanie Lim, Hong Ngee Huang, Nay Ming Jiang, Zhong Tao Altarawneh, Mohammednoor |
| author_facet | Ibrahim, Izwaharyanie Lim, Hong Ngee Huang, Nay Ming Jiang, Zhong Tao Altarawneh, Mohammednoor |
| author_sort | Ibrahim, Izwaharyanie |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Nowadays, increasing the risk for copper leaching into the drinking water in homes, hotels and schools has become unresolved issues all around the countries such as Canada, the United States, and Malaysia. The leaching of copper in tap water is due to a combination of acidic water, damaged pipes, and corroded plumbing fixtures. To remedy this global problem, a triple interconnected structure of CdS/Au/GQDs was designed as a photo-to-electron conversion medium for a real time and selective visible-light-prompt photoelectrochemical (PEC) sensor for Cu2+ ions in real water samples. The synergistic interaction of the CdS/Au/GQDs enabled the smooth transportation of charge carriers to the charge collector and provided a channel to inhibit the charge recombination reaction. Thus, a detection limit of 2.27 nM was obtained, which is 10,000 fold lower than that of WHO’s Guidelines for Drinking-water Quality (∼30 μM). The photocurrent reduction was negligible after 30 days of storage under ambient conditions, suggesting the high stability of photoelectrode. Moreover, the real-time monitoring of Cu2+ ions in real samples was performed with satisfactory results, confirming the capability of the investigated photoelectrode as the most practical detector for trace amounts of Cu2+ ions. |
| first_indexed | 2025-11-15T12:45:32Z |
| format | Article |
| id | upm-87549 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T12:45:32Z |
| publishDate | 2020 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-875492022-11-23T03:16:17Z http://psasir.upm.edu.my/id/eprint/87549/ Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots Ibrahim, Izwaharyanie Lim, Hong Ngee Huang, Nay Ming Jiang, Zhong Tao Altarawneh, Mohammednoor Nowadays, increasing the risk for copper leaching into the drinking water in homes, hotels and schools has become unresolved issues all around the countries such as Canada, the United States, and Malaysia. The leaching of copper in tap water is due to a combination of acidic water, damaged pipes, and corroded plumbing fixtures. To remedy this global problem, a triple interconnected structure of CdS/Au/GQDs was designed as a photo-to-electron conversion medium for a real time and selective visible-light-prompt photoelectrochemical (PEC) sensor for Cu2+ ions in real water samples. The synergistic interaction of the CdS/Au/GQDs enabled the smooth transportation of charge carriers to the charge collector and provided a channel to inhibit the charge recombination reaction. Thus, a detection limit of 2.27 nM was obtained, which is 10,000 fold lower than that of WHO’s Guidelines for Drinking-water Quality (∼30 μM). The photocurrent reduction was negligible after 30 days of storage under ambient conditions, suggesting the high stability of photoelectrode. Moreover, the real-time monitoring of Cu2+ ions in real samples was performed with satisfactory results, confirming the capability of the investigated photoelectrode as the most practical detector for trace amounts of Cu2+ ions. Elsevier 2020-06-05 Article PeerReviewed Ibrahim, Izwaharyanie and Lim, Hong Ngee and Huang, Nay Ming and Jiang, Zhong Tao and Altarawneh, Mohammednoor (2020) Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots. Journal of Hazardous Materials, 391. art. no. 122248. 122248 - 122258. ISSN 0304-3894 https://www.sciencedirect.com/science/article/pii/S0304389420302363 10.1016/j.jhazmat.2020.122248 |
| spellingShingle | Ibrahim, Izwaharyanie Lim, Hong Ngee Huang, Nay Ming Jiang, Zhong Tao Altarawneh, Mohammednoor Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots |
| title | Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots |
| title_full | Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots |
| title_fullStr | Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots |
| title_full_unstemmed | Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots |
| title_short | Selective and sensitive visible-light-prompt photoelectrochemical sensor of Cu2+ based on CdS nanorods modified with Au and graphene quantum dots |
| title_sort | selective and sensitive visible-light-prompt photoelectrochemical sensor of cu2+ based on cds nanorods modified with au and graphene quantum dots |
| url | http://psasir.upm.edu.my/id/eprint/87549/ http://psasir.upm.edu.my/id/eprint/87549/ http://psasir.upm.edu.my/id/eprint/87549/ |