Thin-walled vesicular Triazole-CN-PDI with electronic n→π* excitation and directional movement for enhanced atrazine photodegradation

Tang, Rongdi; Zeng, Hao; Gong, Daoxin; Deng, Yaocheng; Xiong, Sheng; Li, Ling; Zhou, Zhanpeng; Wang, Jiajia; Feng, Chengyang; Tang, Lin

doi:10.1016/j.cej.2022.138445

Cited by 29 publications

(6 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Though the narrow band gap of CN is beneficial for the excitation of photocarriers, it may also give a high recombination rate when the photogenerated electrons and holes cannot be effectively separated. [ 43 ] With the construction of the S‐scheme heterojunction, the PL curve intensity of CNT is largely decreased, for the effective separation of the photocarriers at the heterojunction interfaces. [ 44 ] It is worth mentioning that the PL intensity of the C‐TiO 2 was the lowest, which does not mean it has the best charge separation ability.…”

Section: Resultsmentioning

confidence: 99%

“…The highest current response of CNT in dark and the most significant photo‐current responses under visible light well‐demonstrated its excellent light utilization ability than the pristine CN and C‐TiO 2 . [ 43 ] Therefore, even with individually visible light irradiation, the CNT S‐scheme heterojunction can effectively improve the efficiency of CIP degradation.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Twisty C‐TiO₂/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

Tang

Zeng

Feng

et al. 2023

Small

Self Cite

View full text Add to dashboard Cite

Herein, a twisty C‐TiO2/PCN (CNT) Step‐scheme (S‐scheme) heterojunction is fabricated and applied to degrade ciprofloxacin (CIP) with the assistance of ultrasonic vibration and visible light irradiation. The nitrogen‐rich twisty polymeric carbon nitride (PCN) can not only induce a non‐centrosymmetric structure with enhanced polarity for a better piezoelectric effect but also provide abundant lone pair electrons to promote n→π* transition during photocatalysis. Its hybridization with C‐TiO2 particles can construct S‐scheme heterojunction in CNT. During the piezo‐photocatalysis, the strain‐induced polarization electric field in the heterojunction can regulate the electron migration between the two components, resulting in a more effective CIP degradation. With the synergistic effect of ultrasonic vibration and visible light irradiation, the reaction rate constant of CIP degradation by CNT increases to 0.0517 min−1, which is 1.86 times that of photocatalysis and 6.46 times that of ultrasound. This system exhibits a stable CIP decomposition efficiency under the interference of various environmental factors. In addition, the in‐depth investigation found that three pathways and 12 major intermediates with reduced toxicity are produced after the reaction. Hopefully, the construction of this twisty CNT S‐scheme heterojunction with enhanced piezo‐photocatalytic effect offers inspiration for the design of environmentally functional materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Twisty C‐TiO₂/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

Tang

Zeng

Feng

et al. 2023

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the photocatalytic degradation, the free radicals unselectively attacked 2,4-DCP and other organics, including rhodamine B, atrazine and aniline pollutants . Thus, the Zn-rich CNx posed bright application prospect in the wastewater treatment in paper, printing and dyeing, pharmaceutical and pickled food industries [11,12]. Even though the Zn-rich CNx had many advantages in high-salt wastewater treatment, some investigation also should be taken in future.…”

Section: Prospectivesmentioning

confidence: 99%

High salinity tolerance of Zn-rich CNx in the photocatalytic treatment of wastewater

Chen,

Wang,

Zhu

et al. 2024

Preprint

View full text Add to dashboard Cite

physicochemical methods was effective for the degradation of organics, but was highly hampered by the salt coexist in the complex wastewater matrix, resulting in low degradation dynamics. In this study, ZnO loaded carbon nitride (Zn-CNx) was synthesized and exhibited an excellent performance for 2,4-dichlorophenol (2,4-DCP) degradation (0.63 mg/L/min) in photcatalysis system. The doping of Zn into CNx contributed to the increased light absorption of the catalyst and the optimized electron transport pathways. The quenching experiment results proved that the superoxide radicals (·O2-) played a dominant role and hydroxyl radical (·OH) played a secondary role. Notably, the 2,4-DCP removal increased slightly with increasing salt content. As the initial pH increased from 3 to 11, the first-order degradation kinetic constants increased significantly, and the final pH was equilibrized in the range of 6.01-6.59. This study provided a high performance catalyst for photcatalysis and the mechanism for the effective degradation of 2,4-DCP under high salinity condition.

show abstract

“…21 Usually, the n → π* electronic transition can be achieved via waking up lone pair electrons. 22 The abundance of N atoms on the heptazine structure of g-CN provided a good precondition for the occurrence of n → π* electronic excitation. Intramolecular dipolar interactions caused the disorganized and chaotic electrons in the interior heptazine structure of g-CN to migrate in a specific way.…”

Section: Introductionmentioning

confidence: 99%

“…Ao et al skillfully synthesized a novel CN (CC-UCN2) with asymmetric structure via C doping, which awakened the n → π* electron transition and facilitated the enhancement of photocatalytic activity . Usually, the n → π* electronic transition can be achieved via waking up lone pair electrons . The abundance of N atoms on the heptazine structure of g-CN provided a good precondition for the occurrence of n → π* electronic excitation.…”

Section: Introductionmentioning

confidence: 99%

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Wang

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Charge-transfer dynamics and light utilization efficiency are two critical factors that significantly impact the catalytic performance of a photocatalyst. Therefore, developing a reasonable method to enhance these aspects is a valuable strategy for creating efficient photocatalysts. In this study, we fabricated a donor–acceptor (D–A) structure by modifying graphitic phase carbon nitride (g-CN) nanosheets with 2-aminothiophene-3-carbonitrile (ACT). The introduction of ACT altered the dipole moment of g-CN and significantly extended the conjugated system of g-CN, thereby enhancing the n → π* electronic transition. These improvements in molecular dipole and conjugated system effectively enhanced the charge-transfer dynamics and light utilization efficiency. In addition, the introduction of ACT greatly improved the CO2 adsorption capacity of g-CN nanosheets. Experimental results showed that g-CN-ACT0.05 exhibited the best photocatalytic CO2 reduction performance, with a CO evolution rate of 8.27 μmol g–1 h–1, which was eight times higher than that of unmodified g-CN. This research serves as a reference for developing catalysts with high photocatalytic activity for CO2 reduction.

show abstract

Thin-walled vesicular Triazole-CN-PDI with electronic n→π* excitation and directional movement for enhanced atrazine photodegradation

Cited by 29 publications

References 58 publications

Twisty C‐TiO₂/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

Twisty C‐TiO₂/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

High salinity tolerance of Zn-rich CNx in the photocatalytic treatment of wastewater

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Contact Info

Product

Resources

About

Thin-walled vesicular Triazole-CN-PDI with electronic n→π* excitation and directional movement for enhanced atrazine photodegradation

Cited by 29 publications

References 58 publications

Twisty C‐TiO2/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

Twisty C‐TiO2/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

High salinity tolerance of Zn-rich CNx in the photocatalytic treatment of wastewater

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

Contact Info

Product

Resources

About

Twisty C‐TiO₂/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect

Twisty C‐TiO₂/PCN S‐Scheme Heterojunction with Enhanced n→π * Electronic Excitation for Promoted Piezo‐Photocatalytic Effect