Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities
A series of CdS/ nanocomposites with different Cd to Ti molar ratio were synthesized from P25- nanopowder using microwave-assisted hydrothermal method. The as-produced powders were characterized by XRD, electron microscopy, EDX, and UV-Vis diffuse reflectance spectroscopy. The adsorption capacity an...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Hindawi Publishing Corporation
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/53964/1/Synthesis%20of%20CdS%20sensitized%20TiO2%20photocatalysts.pdf |
| _version_ | 1825930951134281728 |
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| author | Makama, Abdullahi B. Ali, Salmiaton Saion, Elias Choong, Thomas Shean Yaw Abdullah, Norhafizah |
| author_facet | Makama, Abdullahi B. Ali, Salmiaton Saion, Elias Choong, Thomas Shean Yaw Abdullah, Norhafizah |
| author_sort | Makama, Abdullahi B. |
| collection | UPM |
| description | A series of CdS/ nanocomposites with different Cd to Ti molar ratio were synthesized from P25- nanopowder using microwave-assisted hydrothermal method. The as-produced powders were characterized by XRD, electron microscopy, EDX, and UV-Vis diffuse reflectance spectroscopy. The adsorption capacity and photocatalytic activity of the samples were investigated using methylene blue as a model pollutant. Sorption tests revealed that the adsorption of MB onto the samples obeys the Freundlich-Langmuir isotherm model. The sorption capacity decreased as follows: . The results of the photocatalytic tests under high-intensity discharge (HID) lamp revealed that CdS/ powders with low Cd to Ti molar ratios exhibited much higher activities than P25-. The CdS/ sample with 20% CdS/(TCd2) showed the most activity among all these samples. The results also show that the Cd to Ti molar ratio of the nanocomposite has a significant effect on the photodegradation of MB and the enhanced activities exhibited by the nanocomposites are because of the low rate of electron-hole recombination. |
| first_indexed | 2024-03-06T09:19:21Z |
| format | Article |
| id | upm.eprints-53964 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:19:21Z |
| publishDate | 2016 |
| publisher | Hindawi Publishing Corporation |
| record_format | dspace |
| spelling | upm.eprints-539642018-02-22T08:19:03Z http://psasir.upm.edu.my/id/eprint/53964/ Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities Makama, Abdullahi B. Ali, Salmiaton Saion, Elias Choong, Thomas Shean Yaw Abdullah, Norhafizah A series of CdS/ nanocomposites with different Cd to Ti molar ratio were synthesized from P25- nanopowder using microwave-assisted hydrothermal method. The as-produced powders were characterized by XRD, electron microscopy, EDX, and UV-Vis diffuse reflectance spectroscopy. The adsorption capacity and photocatalytic activity of the samples were investigated using methylene blue as a model pollutant. Sorption tests revealed that the adsorption of MB onto the samples obeys the Freundlich-Langmuir isotherm model. The sorption capacity decreased as follows: . The results of the photocatalytic tests under high-intensity discharge (HID) lamp revealed that CdS/ powders with low Cd to Ti molar ratios exhibited much higher activities than P25-. The CdS/ sample with 20% CdS/(TCd2) showed the most activity among all these samples. The results also show that the Cd to Ti molar ratio of the nanocomposite has a significant effect on the photodegradation of MB and the enhanced activities exhibited by the nanocomposites are because of the low rate of electron-hole recombination. Hindawi Publishing Corporation 2016 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/53964/1/Synthesis%20of%20CdS%20sensitized%20TiO2%20photocatalysts.pdf Makama, Abdullahi B. and Ali, Salmiaton and Saion, Elias and Choong, Thomas Shean Yaw and Abdullah, Norhafizah (2016) Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities. International Journal of Photoenergy, 2016. art. no. 2947510. pp. 1-14. ISSN 1110-662X; ESSN: 1687-529X https://www.hindawi.com/journals/ijp/2016/2947510/abs/ CdS/TiO2; Photocatalysts; Methylene blue adsorption; Photocatalytic activities 10.1155/2016/2947510 |
| spellingShingle | CdS/TiO2; Photocatalysts; Methylene blue adsorption; Photocatalytic activities Makama, Abdullahi B. Ali, Salmiaton Saion, Elias Choong, Thomas Shean Yaw Abdullah, Norhafizah Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities |
| title | Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities |
| title_full | Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities |
| title_fullStr | Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities |
| title_full_unstemmed | Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities |
| title_short | Synthesis of CdS sensitized TiO2 photocatalysts: methylene blue adsorption and enhanced photocatalytic activities |
| title_sort | synthesis of cds sensitized tio2 photocatalysts methylene blue adsorption and enhanced photocatalytic activities |
| topic | CdS/TiO2; Photocatalysts; Methylene blue adsorption; Photocatalytic activities |
| url | http://psasir.upm.edu.my/id/eprint/53964/1/Synthesis%20of%20CdS%20sensitized%20TiO2%20photocatalysts.pdf |
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