Carbon Nanotube-Phenyl Modified g-C3N4: A Visible Light Driven Efficient Charge Transfer System for Photocatalytic Degradation of Rhodamine B

被引:0
作者
Ghourichay, Sahar Aghapour [1 ]
Agbolaghi, Samira [2 ]
Corpino, Riccardo [1 ]
Ricci, Pier Carlo [1 ]
机构
[1] Univ Cagliari, Dept Phys, SP 8 Km 0-700, I-09042 Monserrato, CA, Italy
[2] Azarbaijan Shahid Madani Univ, Fac Engn, Chem Engn Dept, Tabriz 53714161, Iran
来源
MOLECULES | 2024年 / 29卷 / 22期
关键词
f-CNT/PhCN photocatalysts; photogenerated electron-hole pairs; HYDROGEN EVOLUTION; FACILE SYNTHESIS; H-2; EVOLUTION; NANOCOMPOSITE; FABRICATION; WATER; HETEROJUNCTION; POLYTHIOPHENE; NANOSHEETS; DIOXIDE;
D O I
10.3390/molecules29225439
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In this study, we report the synthesis and characterization of a novel photocatalyst composite composed of functionalized carbon nanotubes (f-CNT) and phenyl-modified graphitic carbon nitride (PhCN). The incorporation of the phenyl group extends the absorption range into the visible spectrum compared to pure g-C3N4. Additionally, the formation of the heterostructure in the f-CNT/PhCN composite exhibits improved charge transfer efficiency, facilitating the separation and transfer of photogenerated electron-hole pairs and reducing recombination rates. The photocatalytic performance of this composite was evaluated by the degradation of Rhodamine B (RhB) under visible light irradiation. The f-CNT/PhCN composite exhibits remarkable efficiency in degrading RhB, achieving 60% degradation after 4 h, and 100% after 24 h under low-power white LED excitation. This represents a substantial improvement over the non-functionalized CNT/PhCN composite, which shows much lower performance. In contrast, pure PhCN demonstrates very little activity. Structural and optical properties were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy, and UV-Vis spectroscopy. Time-resolved photoluminescence measurements were used to study the behavior of photoexcited carriers, confirming that the composite improves charge transfer efficiency for photogenerated carriers by approximately 30%. The results indicate that the functionalization of CNTs significantly enhances the photocatalytic properties of the composite, making f-CNT/PhCN a promising candidate for environmental remediation applications, particularly in the degradation of organic pollutants in wastewater.
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页数:17
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