Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction
Graphitic carbon nitride (CN), as a nonmetallic photocatalyst, has gained considerable attention for its cost-effectiveness and environmentally friendly nature in catalyzing solar-driven CO2 conversion into valuable products. However, the photocatalytic efficiency of CO2 reduction with CN remains lo...
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sg-ntu-dr.10356-1790162024-07-19T15:45:24Z Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction Xu, Yun Hou, Weidong Huang, Kai Guo, Huazhang Wang, Zeming Lian, Cheng Zhang, Jiye Wu, Deli Lei, Zhendong Liu, Zheng Wang, Liang School of Materials Science and Engineering Engineering Carbon quantum dots Charge migration Graphitic carbon nitride (CN), as a nonmetallic photocatalyst, has gained considerable attention for its cost-effectiveness and environmentally friendly nature in catalyzing solar-driven CO2 conversion into valuable products. However, the photocatalytic efficiency of CO2 reduction with CN remains low, accompanied by challenges in achieving desirable product selectivity. To address these limitations, a two-step hydrothermal-calcination tandem synthesis strategy is presented, introducing carbon quantum dots (CQDs) into CN and forming ultra-thin CQD/CN nanosheets. The integration of CQDs induces a distinct work function with CN, creating a robust interface electric field after the combination. This electric field facilitates the accumulation of photoelectrons in the CQDs region, providing an abundant source of reduced electrons for the photocatalytic process. Remarkably, the CQD/CN nanosheets exhibit an average CO yield of 120 µmol g-1, showcasing an outstanding CO selectivity of 92.8%. The discovery in the work not only presents an innovative pathway for the development of high-performance photocatalysts grounded in non-metallic CN materials employing CQDs but also opens new avenues for versatile application prospects in environmental protection and sustainable cleaning energy. Published version The project was funded by the National Natural Science Foundation of China (21901154) and the Shanghai Pujiang Program (21PJD022). This work was Supported by Shanghai Technical Service Center of Science and Engineering Computing, Shanghai University. 2024-07-16T04:24:34Z 2024-07-16T04:24:34Z 2024 Journal Article Xu, Y., Hou, W., Huang, K., Guo, H., Wang, Z., Lian, C., Zhang, J., Wu, D., Lei, Z., Liu, Z. & Wang, L. (2024). Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction. Advanced Science, e2403607-. https://dx.doi.org/10.1002/advs.202403607 2198-3844 https://hdl.handle.net/10356/179016 10.1002/advs.202403607 38728594 2-s2.0-85192525434 e2403607 en Advanced Science © 2024 The Authors. Advanced Science published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
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Engineering Carbon quantum dots Charge migration Xu, Yun Hou, Weidong Huang, Kai Guo, Huazhang Wang, Zeming Lian, Cheng Zhang, Jiye Wu, Deli Lei, Zhendong Liu, Zheng Wang, Liang Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction |
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Graphitic carbon nitride (CN), as a nonmetallic photocatalyst, has gained considerable attention for its cost-effectiveness and environmentally friendly nature in catalyzing solar-driven CO2 conversion into valuable products. However, the photocatalytic efficiency of CO2 reduction with CN remains low, accompanied by challenges in achieving desirable product selectivity. To address these limitations, a two-step hydrothermal-calcination tandem synthesis strategy is presented, introducing carbon quantum dots (CQDs) into CN and forming ultra-thin CQD/CN nanosheets. The integration of CQDs induces a distinct work function with CN, creating a robust interface electric field after the combination. This electric field facilitates the accumulation of photoelectrons in the CQDs region, providing an abundant source of reduced electrons for the photocatalytic process. Remarkably, the CQD/CN nanosheets exhibit an average CO yield of 120 µmol g-1, showcasing an outstanding CO selectivity of 92.8%. The discovery in the work not only presents an innovative pathway for the development of high-performance photocatalysts grounded in non-metallic CN materials employing CQDs but also opens new avenues for versatile application prospects in environmental protection and sustainable cleaning energy. |
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School of Materials Science and Engineering |
author_facet |
School of Materials Science and Engineering Xu, Yun Hou, Weidong Huang, Kai Guo, Huazhang Wang, Zeming Lian, Cheng Zhang, Jiye Wu, Deli Lei, Zhendong Liu, Zheng Wang, Liang |
format |
Article |
author |
Xu, Yun Hou, Weidong Huang, Kai Guo, Huazhang Wang, Zeming Lian, Cheng Zhang, Jiye Wu, Deli Lei, Zhendong Liu, Zheng Wang, Liang |
author_sort |
Xu, Yun |
title |
Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction |
title_short |
Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction |
title_full |
Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction |
title_fullStr |
Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction |
title_full_unstemmed |
Engineering built-in electric field microenvironment of CQDs/g-C3N4 heterojunction for efficient photocatalytic CO2 reduction |
title_sort |
engineering built-in electric field microenvironment of cqds/g-c3n4 heterojunction for efficient photocatalytic co2 reduction |
publishDate |
2024 |
url |
https://hdl.handle.net/10356/179016 |
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1806059853754400768 |