CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects
Abstract Conversion of CO2 to high value products was considered as a focused issue towards carbon neutrality. Photocatalysis held the potential to realize the target, and graphitic carbon nitride (g‐C3N4) was a competitive candidate. The photocatalytic efficiency of g‐C3N4 limited by the weak adsor...
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| Format: | Article |
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Wiley-VCH
2025-07-01
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| Series: | ChemistryOpen |
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| Online Access: | https://doi.org/10.1002/open.202400431 |
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| author | Weize Li Zhizhong Hu Lingyong Song Yangbo Lv Jincang Liu Changtong Lu Chunping Xu |
| author_facet | Weize Li Zhizhong Hu Lingyong Song Yangbo Lv Jincang Liu Changtong Lu Chunping Xu |
| author_sort | Weize Li |
| collection | DOAJ |
| description | Abstract Conversion of CO2 to high value products was considered as a focused issue towards carbon neutrality. Photocatalysis held the potential to realize the target, and graphitic carbon nitride (g‐C3N4) was a competitive candidate. The photocatalytic efficiency of g‐C3N4 limited by the weak adsorption of CO2 and easy recombination of charge carriers. Herein, Na ion and cyano defects was induced into g‐C3N4 simultaneously using NaHSO3 as alkali molten salt to work out these obstacles. The optimized photocatalyst 3 Na‐CN (the weight of NaHSO3 was 1.5 g) exhibited the highest CO yield (21.5 μmol g−1 h−1), which was 5 times than that of pristine g‐C3N4 (4.29 μmol g−1 h−1). By means of experiments and characterization, 3 Na‐CN displayed better performance in both light utilization and charge separation, which was reflected by the improved photocurrent response, decreased electrochemical impedance, markedly diminished fluorescence intensity, and shortened fluorescence lifetime. This result could be ascribed to the facilitation of electron‐hole separation induced by cyano defects, as well as the enhancement in CO2 adsorption and activation mediated by the Na ion. This work offers a new perspective on dual modulation of graphitic carbon nitride and paves the way for the design of CO2 reduction photocatalyst. |
| format | Article |
| id | doaj-art-0fc526adc1e948a4a0e57ea62f42a41a |
| institution | Kabale University |
| issn | 2191-1363 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley-VCH |
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| series | ChemistryOpen |
| spelling | doaj-art-0fc526adc1e948a4a0e57ea62f42a41a2025-08-20T03:27:19ZengWiley-VCHChemistryOpen2191-13632025-07-01147n/an/a10.1002/open.202400431CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano DefectsWeize Li0Zhizhong Hu1Lingyong Song2Yangbo Lv3Jincang Liu4Changtong Lu5Chunping Xu6Technical Center of China Tobacco Guangxi Industrial Co. Ltd Nanning 530001 ChinaTechnical Center of China Tobacco Guangxi Industrial Co. Ltd Nanning 530001 ChinaTechnical Center of China Tobacco Guangxi Industrial Co. Ltd Nanning 530001 ChinaTechnical Center of China Tobacco Guangxi Industrial Co. Ltd Nanning 530001 ChinaTechnical Center of China Tobacco Guangxi Industrial Co. Ltd Nanning 530001 ChinaTechnical Center of China Tobacco Henan Industrial Co. Ltd. Zhengzhou 450016 ChinaCollege of Tobacco Science and Engineering Zhengzhou University of Light Industry Zhengzhou 450002 ChinaAbstract Conversion of CO2 to high value products was considered as a focused issue towards carbon neutrality. Photocatalysis held the potential to realize the target, and graphitic carbon nitride (g‐C3N4) was a competitive candidate. The photocatalytic efficiency of g‐C3N4 limited by the weak adsorption of CO2 and easy recombination of charge carriers. Herein, Na ion and cyano defects was induced into g‐C3N4 simultaneously using NaHSO3 as alkali molten salt to work out these obstacles. The optimized photocatalyst 3 Na‐CN (the weight of NaHSO3 was 1.5 g) exhibited the highest CO yield (21.5 μmol g−1 h−1), which was 5 times than that of pristine g‐C3N4 (4.29 μmol g−1 h−1). By means of experiments and characterization, 3 Na‐CN displayed better performance in both light utilization and charge separation, which was reflected by the improved photocurrent response, decreased electrochemical impedance, markedly diminished fluorescence intensity, and shortened fluorescence lifetime. This result could be ascribed to the facilitation of electron‐hole separation induced by cyano defects, as well as the enhancement in CO2 adsorption and activation mediated by the Na ion. This work offers a new perspective on dual modulation of graphitic carbon nitride and paves the way for the design of CO2 reduction photocatalyst.https://doi.org/10.1002/open.202400431Cyano defectg-C3N4Melton saltNa ion dopingPhotocatalytic CO2 reduction |
| spellingShingle | Weize Li Zhizhong Hu Lingyong Song Yangbo Lv Jincang Liu Changtong Lu Chunping Xu CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects ChemistryOpen Cyano defect g-C3N4 Melton salt Na ion doping Photocatalytic CO2 reduction |
| title | CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects |
| title_full | CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects |
| title_fullStr | CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects |
| title_full_unstemmed | CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects |
| title_short | CO2 Photoreduction Improvement by Carbon Nitride Utilizing the Synergism of Na Ion and Cyano Defects |
| title_sort | co2 photoreduction improvement by carbon nitride utilizing the synergism of na ion and cyano defects |
| topic | Cyano defect g-C3N4 Melton salt Na ion doping Photocatalytic CO2 reduction |
| url | https://doi.org/10.1002/open.202400431 |
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