Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances
We report the successful synthesis of a highly ordered TiO2 nanotube array coated with a thin film of C3N4 nanoparticles using a straightforward hydrothermal-calcination approach. The resulting g-C3N4/TiO2-NTAs (CN/TONTs) nanohybrids exhibit significantly enhanced photoelectrochemical (PEC) photodeg...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028679 |
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| author | Zhufeng Shao Lue Zhan Yiman Zhang Yonglong Zhang Guoyang Yu Yunfei Song Xiaoming Xiu |
| author_facet | Zhufeng Shao Lue Zhan Yiman Zhang Yonglong Zhang Guoyang Yu Yunfei Song Xiaoming Xiu |
| author_sort | Zhufeng Shao |
| collection | DOAJ |
| description | We report the successful synthesis of a highly ordered TiO2 nanotube array coated with a thin film of C3N4 nanoparticles using a straightforward hydrothermal-calcination approach. The resulting g-C3N4/TiO2-NTAs (CN/TONTs) nanohybrids exhibit significantly enhanced photoelectrochemical (PEC) photodegradation and gas-sensing capabilities when irradiated with UV–visible light. The PEC activity of these nanohybrids is notably superior to that of their semiconductor counterparts, primarily due to the synergistic coupling of strong heterojunction interfaces and abundant surface defects. Furthermore, nanosecond time-resolved transient photoluminescence and time-resolved fluorescence spectroscopy analyses suggest a coherent interfacial charge transfer mechanism, which elucidates the dominant dynamic processes within the CN/TONTs nanostructure. The optimized CN/TONTs-5 nanocomposite was observed to achieve a remarkable 98.3% photodegradation rate of methyl orange under UV–visible light excitation, which was found to outperform CN/TONTs-2 and CN/TONTs-8 by factors of 1.36 and 1.12, respectively. Furthermore, CN/TONTs-5 displays enhanced gas-sensing capabilities, exhibiting heightened sensitivity and accelerated response kinetics in comparison to CN/TONTs-2 and CN/TONTs-8. |
| format | Article |
| id | doaj-art-249bd688cacf48d6b0a5b3ee4387a257 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-249bd688cacf48d6b0a5b3ee4387a2572025-01-19T06:25:15ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134639654Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performancesZhufeng Shao0Lue Zhan1Yiman Zhang2Yonglong Zhang3Guoyang Yu4Yunfei Song5Xiaoming Xiu6College of physical science and technology, Bohai University, Jinzhou, Liaoning, 121000, China; Corresponding author.College of physical science and technology, Bohai University, Jinzhou, Liaoning, 121000, ChinaCollege of physical science and technology, Bohai University, Jinzhou, Liaoning, 121000, ChinaCollege of physical science and technology, Bohai University, Jinzhou, Liaoning, 121000, China; National key laboratory of shock wave and detonation physics, Institute of fluid physics, China academy of engineering physics, Mianyang, ChinaNational key laboratory of shock wave and detonation physics, Institute of fluid physics, China academy of engineering physics, Mianyang, ChinaNational key laboratory of shock wave and detonation physics, Institute of fluid physics, China academy of engineering physics, Mianyang, ChinaCollege of physical science and technology, Bohai University, Jinzhou, Liaoning, 121000, China; Corresponding author.We report the successful synthesis of a highly ordered TiO2 nanotube array coated with a thin film of C3N4 nanoparticles using a straightforward hydrothermal-calcination approach. The resulting g-C3N4/TiO2-NTAs (CN/TONTs) nanohybrids exhibit significantly enhanced photoelectrochemical (PEC) photodegradation and gas-sensing capabilities when irradiated with UV–visible light. The PEC activity of these nanohybrids is notably superior to that of their semiconductor counterparts, primarily due to the synergistic coupling of strong heterojunction interfaces and abundant surface defects. Furthermore, nanosecond time-resolved transient photoluminescence and time-resolved fluorescence spectroscopy analyses suggest a coherent interfacial charge transfer mechanism, which elucidates the dominant dynamic processes within the CN/TONTs nanostructure. The optimized CN/TONTs-5 nanocomposite was observed to achieve a remarkable 98.3% photodegradation rate of methyl orange under UV–visible light excitation, which was found to outperform CN/TONTs-2 and CN/TONTs-8 by factors of 1.36 and 1.12, respectively. Furthermore, CN/TONTs-5 displays enhanced gas-sensing capabilities, exhibiting heightened sensitivity and accelerated response kinetics in comparison to CN/TONTs-2 and CN/TONTs-8.http://www.sciencedirect.com/science/article/pii/S2238785424028679CN/TONTs nanoheterostructureVacancies defectsCharge transferPhotoelectrochemical degradationGas-sensing |
| spellingShingle | Zhufeng Shao Lue Zhan Yiman Zhang Yonglong Zhang Guoyang Yu Yunfei Song Xiaoming Xiu Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances Journal of Materials Research and Technology CN/TONTs nanoheterostructure Vacancies defects Charge transfer Photoelectrochemical degradation Gas-sensing |
| title | Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances |
| title_full | Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances |
| title_fullStr | Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances |
| title_full_unstemmed | Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances |
| title_short | Insights on nitrogen/oxygen dual defects synergistic modulated charge transfer across the g-C3N4/TiO2-NTAs heterojunction enhanced photodegradation and gas-sensing performances |
| title_sort | insights on nitrogen oxygen dual defects synergistic modulated charge transfer across the g c3n4 tio2 ntas heterojunction enhanced photodegradation and gas sensing performances |
| topic | CN/TONTs nanoheterostructure Vacancies defects Charge transfer Photoelectrochemical degradation Gas-sensing |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028679 |
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