Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating
Coating of ZnS and CdS nanoparticles with organic and inorganic materials can extend their light absorption in the visible region and their stability against photo-corrosion. Such materials could emerge as excellent photocatalysts for the elimination of pollutants from aqueous media using solar ener...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/52303/ http://psasir.upm.edu.my/id/eprint/52303/1/Enhancement%20of%20visible%20light%20photocatalytic%20activity%20of%20ZnS%20and%20CdS%20nanoparticles%20based%20on%20organic%20and%20inorganic%20coating.pdf |
| _version_ | 1848852068768415744 |
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| author | Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Navasery, Manizheh Bahmanrokh, Ghazaleh Saraee, Khadijeh Rezaee Ebrahim |
| author_facet | Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Navasery, Manizheh Bahmanrokh, Ghazaleh Saraee, Khadijeh Rezaee Ebrahim |
| author_sort | Soltani, Nayereh |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Coating of ZnS and CdS nanoparticles with organic and inorganic materials can extend their light absorption in the visible region and their stability against photo-corrosion. Such materials could emerge as excellent photocatalysts for the elimination of pollutants from aqueous media using solar energy. In this study, PVP (polyvinyl pyrrolidone)-capped ZnS and CdS nanoparticles, ZnS/CdS and CdS/ZnS core shell nanoparticles were synthesized by microwave irradiation method and characterized using different techniques. The XRD patterns exhibited cubic and hexagonal structures for coated ZnS and CdS nanoparticles, respectively. Morphological evaluation of TEM images showed that the nanoparticles are generally spherical in shape. The UV–visible spectra confirmed a shift in the band gap of coated nanoparticles to longer or shorter wavelengths due to size and potential-well effects. The photocatalytic activity of nanoparticles toward dye degradation under visible light was found to be improved after coating. PVP-capped ZnS and CdS exhibited an enhancement in the initial methylene blue degradation efficiency by a factor of about 1.3. ZnS nanoparticles coated by CdS displayed the initial efficiency 3.2 times higher than bare ZnS. The maximum dye removal was obtained in presence of CdS/ZnS core shells which is 1.4 times more efficient than bare CdS. |
| first_indexed | 2025-11-15T10:32:12Z |
| format | Article |
| id | upm-52303 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:32:12Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-523032020-04-15T16:55:13Z http://psasir.upm.edu.my/id/eprint/52303/ Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Navasery, Manizheh Bahmanrokh, Ghazaleh Saraee, Khadijeh Rezaee Ebrahim Coating of ZnS and CdS nanoparticles with organic and inorganic materials can extend their light absorption in the visible region and their stability against photo-corrosion. Such materials could emerge as excellent photocatalysts for the elimination of pollutants from aqueous media using solar energy. In this study, PVP (polyvinyl pyrrolidone)-capped ZnS and CdS nanoparticles, ZnS/CdS and CdS/ZnS core shell nanoparticles were synthesized by microwave irradiation method and characterized using different techniques. The XRD patterns exhibited cubic and hexagonal structures for coated ZnS and CdS nanoparticles, respectively. Morphological evaluation of TEM images showed that the nanoparticles are generally spherical in shape. The UV–visible spectra confirmed a shift in the band gap of coated nanoparticles to longer or shorter wavelengths due to size and potential-well effects. The photocatalytic activity of nanoparticles toward dye degradation under visible light was found to be improved after coating. PVP-capped ZnS and CdS exhibited an enhancement in the initial methylene blue degradation efficiency by a factor of about 1.3. ZnS nanoparticles coated by CdS displayed the initial efficiency 3.2 times higher than bare ZnS. The maximum dye removal was obtained in presence of CdS/ZnS core shells which is 1.4 times more efficient than bare CdS. Elsevier 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/52303/1/Enhancement%20of%20visible%20light%20photocatalytic%20activity%20of%20ZnS%20and%20CdS%20nanoparticles%20based%20on%20organic%20and%20inorganic%20coating.pdf Soltani, Nayereh and Saion, Elias and Mat Yunus, Wan Mahmood and Haghiri, Maryam Erfani and Navasery, Manizheh and Bahmanrokh, Ghazaleh and Saraee, Khadijeh Rezaee Ebrahim (2014) Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating. Applied Surface Science, 290. pp. 440-447. ISSN 0169-4332; ESSN: 1873-5584 http://www.sciencedirect.com/science/article/pii/S016943321302182X 10.1016/j.apsusc.2013.11.104 |
| spellingShingle | Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Navasery, Manizheh Bahmanrokh, Ghazaleh Saraee, Khadijeh Rezaee Ebrahim Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating |
| title | Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating |
| title_full | Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating |
| title_fullStr | Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating |
| title_full_unstemmed | Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating |
| title_short | Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating |
| title_sort | enhancement of visible light photocatalytic activity of zns and cds nanoparticles based on organic and inorganic coating |
| url | http://psasir.upm.edu.my/id/eprint/52303/ http://psasir.upm.edu.my/id/eprint/52303/ http://psasir.upm.edu.my/id/eprint/52303/ http://psasir.upm.edu.my/id/eprint/52303/1/Enhancement%20of%20visible%20light%20photocatalytic%20activity%20of%20ZnS%20and%20CdS%20nanoparticles%20based%20on%20organic%20and%20inorganic%20coating.pdf |