Influence of biochar content on structure and photocatalytic activity of TiO₂/g-C₃N₄/biochar composite materials
Vol. 134 No. 1A (2025), Original Article
Vol. 134 No. 1A (2025)

Influence of biochar content on structure and photocatalytic activity of TiO₂/g-C₃N₄/biochar composite materials

Original Article
https://doi.org/10.26459/hueunijns.v134i1A.7764
Published 2025-03-24
Thanh Tuoi Nguyen
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Thi Minh Nguyet Bui
Dong Thap University, Dong Thap, Vietnam
Minh Luon Nguyen
Dong Thap University, Dong Thap, Vietnam
Nguyen Van Hung*
Dong Thap University, Dong Thap, Vietnam
PDF (Vietnamese)

Keywords

photodegradation Titanium dioxide
biochar
graphitic carbon nitride
doxycycline
phân hủy quang xúc tác

How to Cite

1.
Nguyễn TT, Bùi TMN, Nguyễn ML, Nguyễn VH. Influence of biochar content on structure and photocatalytic activity of TiO₂/g-C₃N₄/biochar composite materials. hueuni-jns [Internet]. 2025Mar.24 [cited 2025Apr.26];134(1A):43-5. Available from: http://222.255.146.83/index.php/hujos-ns/article/view/7764
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Abstract

In this study, a ternary composite material TiO₂/g-C₃N₄/biochar (TCNBC), derived from reed stalks, was successfully synthesised by using a simple hydrolysis method. The study demonstrates that biochar has a significant impact on the structure and photocatalytic activity of the obtained composite. Biochar plays a crucial role in inhibiting crystal growth, increasing the specific surface area, reducing the band gap energy, and enhancing the visible light absorption capability of TiO₂. The TCNBC composite exhibits an average crystal size of 5.5 nm and a lower band gap energy of 0.62 eV, while its specific surface area (32.6 m²/g) is significantly higher than that of pure TiO₂ (33.7 nm, 3.02 eV, and 2.1 m²/g). The synthesised photocatalyst composite effectively catalysed the photodegradation of doxycycline (DC) from aqueous solutions. This composite exhibited approximately 7.48 times higher photocatalytic activity compared with pure TiO₂. The TCNBC composite synthesised with a TiOSO₄/g-C₃N₄/biochar mass ratio of 4/1.5/0.5 achieved the highest DC photodegradation efficiency, reaching 91.93% within 120 minutes of visible light irradiation. These findings indicate that the synthesised catalyst holds great promise for the treatment of DC in wastewater.

https://doi.org/10.26459/hueunijns.v134i1A.7764
PDF (Vietnamese)

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