Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles
ZnS and CdS nanoparticles were prepared by a simple microwave irradiation method under mild conditions. The obtained nanoparticles were characterized by XRD, TEM and EDX. The results indicated that high purity of nanosized ZnS and CdS was successfully obtained with cubic and hexagonal crystalline st...
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| Format: | Article |
| Language: | English |
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MDPI AG
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/52278/ http://psasir.upm.edu.my/id/eprint/52278/1/52278.pdf |
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| author | Soltani, Nayereh Saion, Elias Hussein, Mohd Zobir Haghiri, Maryam Erfani Abedini, Alam Bahmanrokh, Ghazaleh Navasery, Manizheh Vaziri, Parisa |
| author_facet | Soltani, Nayereh Saion, Elias Hussein, Mohd Zobir Haghiri, Maryam Erfani Abedini, Alam Bahmanrokh, Ghazaleh Navasery, Manizheh Vaziri, Parisa |
| author_sort | Soltani, Nayereh |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | ZnS and CdS nanoparticles were prepared by a simple microwave irradiation method under mild conditions. The obtained nanoparticles were characterized by XRD, TEM and EDX. The results indicated that high purity of nanosized ZnS and CdS was successfully obtained with cubic and hexagonal crystalline structures, respectively. The band gap energies of ZnS and CdS nanoparticles were estimated using UV-visible absorption spectra to be about 4.22 and 2.64 eV, respectively. Photocatalytic degradation of methylene blue was carried out using physical mixtures of ZnS and CdS nanoparticles under a 500-W halogen lamp of visible light irradiation. The residual concentration of methylene blue solution was monitored using UV-visible absorption spectrometry. From the study of the variation in composition of ZnS:CdS, a composition of 1:4 (by weight) was found to be very efficient for degradation of methylene blue. In this case the degradation efficiency of the photocatalyst nanoparticles after 6 h irradiation time was about 73% with a reaction rate of 3.61 × 10−3 min−1. Higher degradation efficiency and reaction rate were achieved by increasing the amount of photocatalyst and initial pH of the solution. |
| first_indexed | 2025-11-15T10:32:06Z |
| format | Article |
| id | upm-52278 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:32:06Z |
| publishDate | 2012 |
| publisher | MDPI AG |
| recordtype | eprints |
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| spelling | upm-522782017-06-05T05:39:39Z http://psasir.upm.edu.my/id/eprint/52278/ Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles Soltani, Nayereh Saion, Elias Hussein, Mohd Zobir Haghiri, Maryam Erfani Abedini, Alam Bahmanrokh, Ghazaleh Navasery, Manizheh Vaziri, Parisa ZnS and CdS nanoparticles were prepared by a simple microwave irradiation method under mild conditions. The obtained nanoparticles were characterized by XRD, TEM and EDX. The results indicated that high purity of nanosized ZnS and CdS was successfully obtained with cubic and hexagonal crystalline structures, respectively. The band gap energies of ZnS and CdS nanoparticles were estimated using UV-visible absorption spectra to be about 4.22 and 2.64 eV, respectively. Photocatalytic degradation of methylene blue was carried out using physical mixtures of ZnS and CdS nanoparticles under a 500-W halogen lamp of visible light irradiation. The residual concentration of methylene blue solution was monitored using UV-visible absorption spectrometry. From the study of the variation in composition of ZnS:CdS, a composition of 1:4 (by weight) was found to be very efficient for degradation of methylene blue. In this case the degradation efficiency of the photocatalyst nanoparticles after 6 h irradiation time was about 73% with a reaction rate of 3.61 × 10−3 min−1. Higher degradation efficiency and reaction rate were achieved by increasing the amount of photocatalyst and initial pH of the solution. MDPI AG 2012 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/52278/1/52278.pdf Soltani, Nayereh and Saion, Elias and Hussein, Mohd Zobir and Haghiri, Maryam Erfani and Abedini, Alam and Bahmanrokh, Ghazaleh and Navasery, Manizheh and Vaziri, Parisa (2012) Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles. International Journal of Molecular Sciences, 13 (10). pp. 12242-12258. ISSN 1422-0067 http://www.mdpi.com/1422-0067/13/10/12242 10.3390/ijms131012242 |
| spellingShingle | Soltani, Nayereh Saion, Elias Hussein, Mohd Zobir Haghiri, Maryam Erfani Abedini, Alam Bahmanrokh, Ghazaleh Navasery, Manizheh Vaziri, Parisa Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles |
| title | Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles |
| title_full | Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles |
| title_fullStr | Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles |
| title_full_unstemmed | Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles |
| title_short | Visible light-induced degradation of methylene blue in the presence of photocatalytic ZnS and CdS nanoparticles |
| title_sort | visible light-induced degradation of methylene blue in the presence of photocatalytic zns and cds nanoparticles |
| url | http://psasir.upm.edu.my/id/eprint/52278/ http://psasir.upm.edu.my/id/eprint/52278/ http://psasir.upm.edu.my/id/eprint/52278/ http://psasir.upm.edu.my/id/eprint/52278/1/52278.pdf |