Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation
This work explores the impact of reaction temperature during thermal exfoliation treatment of bulk-g-C3N4 in the air atmosphere on the structure and performance of the resulting CN photocatalyst. The analysis conducted using XRD, FT-IR, XPS, SEM, and elements mapping tests, illustrated an increase i...
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Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)
2024-10-01
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| Series: | Bulletin of Chemical Reaction Engineering & Catalysis |
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| Online Access: | https://journal.bcrec.id/index.php/bcrec/article/view/20189 |
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| author | Xinshan Zhao Junwei Yu Tingyu Meng Yuanyuan Luo Yanzhen Fu Zhao Li Lin Tian Limei Sun Jing Li |
| author_facet | Xinshan Zhao Junwei Yu Tingyu Meng Yuanyuan Luo Yanzhen Fu Zhao Li Lin Tian Limei Sun Jing Li |
| author_sort | Xinshan Zhao |
| collection | DOAJ |
| description | This work explores the impact of reaction temperature during thermal exfoliation treatment of bulk-g-C3N4 in the air atmosphere on the structure and performance of the resulting CN photocatalyst. The analysis conducted using XRD, FT-IR, XPS, SEM, and elements mapping tests, illustrated an increase in nitrogen-vacancy and oxygen content on the surface of the CN photocatalyst, resulting in a porous and sparse structure, changes in crystal size, and improved visible light absorption performance. The photocatalytic reduction experiments of hexavalent chromium (Cr(VI)) showed that the CN-540 showed the highest reduction rate of 96.9%, with a reaction rate constant 6.21 times that of bulk-g-C3N4. After 100 min of illumination, the photocatalytic degradation rates of CN-540 for TC-HCl and RhB were 66.7% and 60.6%, respectively. The TOC test results indicated mineralization rates of 51.5% for TC-HCl and 46.6% for RhB. Room temperature fluorescence spectroscopy (PL), transient photocurrent response (TPC), and electrochemical impedance spectroscopy (EIS) measurements confirmed the excellent photogenerated charge carrier separation and transport efficiency of CN-540. The photocatalytic mechanism for reducing Cr(VI) by CN-540 was elucidated based on the active species •OH and •O2– and Mott-Schottky (M-S) tests. This study provides experimental data for optimizing the photocatalytic performance of g-C3N4 and paves a new way for developing efficient photocatalysts. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). |
| format | Article |
| id | doaj-art-c309152a849e45289dc3f8069b77b0e6 |
| institution | Kabale University |
| issn | 1978-2993 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS) |
| record_format | Article |
| series | Bulletin of Chemical Reaction Engineering & Catalysis |
| spelling | doaj-art-c309152a849e45289dc3f8069b77b0e62025-02-02T02:54:11ZengMasyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)Bulletin of Chemical Reaction Engineering & Catalysis1978-29932024-10-0119344245410.9767/bcrec.201898462Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal ExfoliationXinshan Zhao0Junwei Yu1Tingyu Meng2Yuanyuan Luo3Yanzhen Fu4Zhao Li5Lin Tian6Limei Sun7Jing Li8School of Chemistry and Environmental Science, Yili Normal University, 835000, Yining, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaSchool of Chemistry and Environmental Science, Yili Normal University, 835000, Yining, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaSchool of Materials and Chemical Engineering, Xuzhou University of Technology, 221018, Xuzhou, ChinaThis work explores the impact of reaction temperature during thermal exfoliation treatment of bulk-g-C3N4 in the air atmosphere on the structure and performance of the resulting CN photocatalyst. The analysis conducted using XRD, FT-IR, XPS, SEM, and elements mapping tests, illustrated an increase in nitrogen-vacancy and oxygen content on the surface of the CN photocatalyst, resulting in a porous and sparse structure, changes in crystal size, and improved visible light absorption performance. The photocatalytic reduction experiments of hexavalent chromium (Cr(VI)) showed that the CN-540 showed the highest reduction rate of 96.9%, with a reaction rate constant 6.21 times that of bulk-g-C3N4. After 100 min of illumination, the photocatalytic degradation rates of CN-540 for TC-HCl and RhB were 66.7% and 60.6%, respectively. The TOC test results indicated mineralization rates of 51.5% for TC-HCl and 46.6% for RhB. Room temperature fluorescence spectroscopy (PL), transient photocurrent response (TPC), and electrochemical impedance spectroscopy (EIS) measurements confirmed the excellent photogenerated charge carrier separation and transport efficiency of CN-540. The photocatalytic mechanism for reducing Cr(VI) by CN-540 was elucidated based on the active species •OH and •O2– and Mott-Schottky (M-S) tests. This study provides experimental data for optimizing the photocatalytic performance of g-C3N4 and paves a new way for developing efficient photocatalysts. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).https://journal.bcrec.id/index.php/bcrec/article/view/20189graphitic carbon nitridethermal exfoliationphotocatalytic reductioncr(vi)photo-induced charge carriers |
| spellingShingle | Xinshan Zhao Junwei Yu Tingyu Meng Yuanyuan Luo Yanzhen Fu Zhao Li Lin Tian Limei Sun Jing Li Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation Bulletin of Chemical Reaction Engineering & Catalysis graphitic carbon nitride thermal exfoliation photocatalytic reduction cr(vi) photo-induced charge carriers |
| title | Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation |
| title_full | Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation |
| title_fullStr | Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation |
| title_full_unstemmed | Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation |
| title_short | Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation |
| title_sort | modulation of the microstructure and enhancement of the photocatalytic performance of g c3n4 by thermal exfoliation |
| topic | graphitic carbon nitride thermal exfoliation photocatalytic reduction cr(vi) photo-induced charge carriers |
| url | https://journal.bcrec.id/index.php/bcrec/article/view/20189 |
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