Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation
Graphitic carbon nitride (GCN) is a promising metal-free photocatalyst while suffering from low charge mobility induced inefficient photocatalysis. In this work, oxygen doping was employed to enhance the photodegradation of organic pollutants in water on graphitic carbon nitride (GCNO) under visible...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Academic Press
2016
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| Online Access: | http://purl.org/au-research/grants/arc/DP150103026 http://hdl.handle.net/20.500.11937/6517 |
| _version_ | 1848745097915531264 |
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| author | Liu, S. Sun, Hongqi Ang, H. Tade, Moses Wang, Shaobin |
| author_facet | Liu, S. Sun, Hongqi Ang, H. Tade, Moses Wang, Shaobin |
| author_sort | Liu, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Graphitic carbon nitride (GCN) is a promising metal-free photocatalyst while suffering from low charge mobility induced inefficient photocatalysis. In this work, oxygen doping was employed to enhance the photodegradation of organic pollutants in water on graphitic carbon nitride (GCNO) under visible light. For further absorption extension, four organic dyes (Eosin-Y, Perylene, Nile-red and Coumarin) were adopted to dye-sensitize the GCNO photocatalyst. It was found that O-doping can promote dye sensitization, which was dependent on the type of dyes and influenced the photodegradation efficiencies of methylene blue (MB) and phenol. Nile-red sensitized GCNO presented the best activity in MB degradation under λ > 480 nm irradiations while Eosin-Y showed the best sensitization performance for phenol degradation under λ > 420 nm light source. However, dye sensitization was not effective for enhanced pollutant degradation on GCN without O-doping. UV–vis diffuse reflectance spectra (UV–vis DRS), photoluminescence (PL) spectra, and photocurrent analyses were applied to investigate the mechanism of carriers’ transfer, which indicated that dye molecules could inject extra electrons into GCNO energy band and the energy dislocation could suppress electron/hole recombination, enhancing photocatalytic performances. |
| first_indexed | 2025-11-14T06:11:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-6517 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:11:57Z |
| publishDate | 2016 |
| publisher | Academic Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-65172022-10-12T07:40:03Z Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation Liu, S. Sun, Hongqi Ang, H. Tade, Moses Wang, Shaobin Graphitic carbon nitride (GCN) is a promising metal-free photocatalyst while suffering from low charge mobility induced inefficient photocatalysis. In this work, oxygen doping was employed to enhance the photodegradation of organic pollutants in water on graphitic carbon nitride (GCNO) under visible light. For further absorption extension, four organic dyes (Eosin-Y, Perylene, Nile-red and Coumarin) were adopted to dye-sensitize the GCNO photocatalyst. It was found that O-doping can promote dye sensitization, which was dependent on the type of dyes and influenced the photodegradation efficiencies of methylene blue (MB) and phenol. Nile-red sensitized GCNO presented the best activity in MB degradation under λ > 480 nm irradiations while Eosin-Y showed the best sensitization performance for phenol degradation under λ > 420 nm light source. However, dye sensitization was not effective for enhanced pollutant degradation on GCN without O-doping. UV–vis diffuse reflectance spectra (UV–vis DRS), photoluminescence (PL) spectra, and photocurrent analyses were applied to investigate the mechanism of carriers’ transfer, which indicated that dye molecules could inject extra electrons into GCNO energy band and the energy dislocation could suppress electron/hole recombination, enhancing photocatalytic performances. 2016 Journal Article http://hdl.handle.net/20.500.11937/6517 10.1016/j.jcis.2016.05.026 http://purl.org/au-research/grants/arc/DP150103026 Academic Press restricted |
| spellingShingle | Liu, S. Sun, Hongqi Ang, H. Tade, Moses Wang, Shaobin Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| title | Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| title_full | Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| title_fullStr | Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| title_full_unstemmed | Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| title_short | Integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| title_sort | integrated oxygen-doping and dye sensitization of graphitic carbon nitride for enhanced visible light photodegradation |
| url | http://purl.org/au-research/grants/arc/DP150103026 http://hdl.handle.net/20.500.11937/6517 |