Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light
In situ sulfur-doped mesoporous g-C3N4 (mpgCNS) was synthesized from a simple organosulfur compound, thiourea, using SiO2 nanoparticles as the hard template. The resultant product has a high surface area of 128 m2 g−1 and mesopores in the range of 10–20 nm. Based on X-ray photoelectron spectroscopy...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/96341 http://hdl.handle.net/10220/11539 |
| _version_ | 1826114996474478592 |
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| author | Hong, Jindui Xia, Xiaoyang Wang, Yongsheng Xu, Rong |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Hong, Jindui Xia, Xiaoyang Wang, Yongsheng Xu, Rong |
| author_sort | Hong, Jindui |
| collection | NTU |
| description | In situ sulfur-doped mesoporous g-C3N4 (mpgCNS) was synthesized from a simple organosulfur compound, thiourea, using SiO2 nanoparticles as the hard template. The resultant product has a high surface area of 128 m2 g−1 and mesopores in the range of 10–20 nm. Based on X-ray photoelectron spectroscopy analysis, the doped sulfur was proposed to substitute carbon in mpgCNS and a downshift of 0.25 eV was resulted in its conduction band. Optical studies indicated that mpgCNS exhibits enhanced and extended light absorbance in the visible light region and a much lower density of defects compared to the native g-C3N4. As a result, mpgCNS has been found to be 30 times more active than the native g-C3N4 for hydrogen evolution from photocatalytic water splitting. A high quantum efficiency of 5.8% at 440 nm was obtained which is among the highest for carbon nitride photocatalysts. |
| first_indexed | 2024-10-01T03:48:19Z |
| format | Journal Article |
| id | ntu-10356/96341 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:48:19Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/963412020-03-07T13:22:17Z Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light Hong, Jindui Xia, Xiaoyang Wang, Yongsheng Xu, Rong School of Chemical and Biomedical Engineering School of Mechanical and Aerospace Engineering DRNTU::Engineering::Chemical engineering In situ sulfur-doped mesoporous g-C3N4 (mpgCNS) was synthesized from a simple organosulfur compound, thiourea, using SiO2 nanoparticles as the hard template. The resultant product has a high surface area of 128 m2 g−1 and mesopores in the range of 10–20 nm. Based on X-ray photoelectron spectroscopy analysis, the doped sulfur was proposed to substitute carbon in mpgCNS and a downshift of 0.25 eV was resulted in its conduction band. Optical studies indicated that mpgCNS exhibits enhanced and extended light absorbance in the visible light region and a much lower density of defects compared to the native g-C3N4. As a result, mpgCNS has been found to be 30 times more active than the native g-C3N4 for hydrogen evolution from photocatalytic water splitting. A high quantum efficiency of 5.8% at 440 nm was obtained which is among the highest for carbon nitride photocatalysts. 2013-07-16T04:26:14Z 2019-12-06T19:29:17Z 2013-07-16T04:26:14Z 2019-12-06T19:29:17Z 2012 2012 Journal Article Hong, J., Xia, X., Wang, Y., & Xu, R. (2012). Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light. Journal of Materials Chemistry, 22(30), 15006-15012. https://hdl.handle.net/10356/96341 http://hdl.handle.net/10220/11539 10.1039/c2jm32053c en Journal of materials chemistry © 2012 The Royal Society of Chemistry. |
| spellingShingle | DRNTU::Engineering::Chemical engineering Hong, Jindui Xia, Xiaoyang Wang, Yongsheng Xu, Rong Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| title | Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| title_full | Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| title_fullStr | Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| title_full_unstemmed | Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| title_short | Mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| title_sort | mesoporous carbon nitride with in situ sulfur doping for enhanced photocatalytic hydrogen evolution from water under visible light |
| topic | DRNTU::Engineering::Chemical engineering |
| url | https://hdl.handle.net/10356/96341 http://hdl.handle.net/10220/11539 |
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