High efficiency of Ag-g-C3N4@HAp as green catalyst for photodegradation of tetracycline

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Authors

  • Pham Xuan Nui Department of Chemical Engineering, Hanoi University of Mining and Geology, 18 Vien street, Dong Ngac ward, Ha Noi, Viet Nam https://orcid.org/0000-0002-7469-3001
  • Pham Thi Yen Phi Department of Chemical Engineering, Hanoi University of Mining and Geology, 18 Vien street, Dong Ngac ward, Ha Noi, Viet Nam https://orcid.org/0009-0001-6860-6012
  • Phan Trung Kien Department of Chemical Engineering, Hanoi University of Mining and Geology, 18 Vien street, Dong Ngac ward, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/19492

Keywords:

HAp, g-C3N4, tetracycline (TC), Ag-g-C3N4@HAp, composite

Abstract

In the present work, a green method was used for the synthesis of Ag-g-C3N4@HAp nanocomposite. Namely, hydroxyapatite (HAp) and silver nanoparticles (Ag-NPs) were synthesized using biological waste and natural materials as seashells and Centella asiatica (L.) Urban extract. The structure, morphology and composition of the composites were characterized by XRD, SEM and EDX methods. Besides, TEM images showed that silver nanoparticles dispersed on g-C3N4 and HAp. XPS spectra determined the valence state of elements in the composite. The superior optical properties of g-C3N4@HAp containing Ag-NPs with low band gap energy (Eg = 2.59 eV) demonstrated degradation of tetracycline up to 99.5 % compared to HAp pure (90 %) and g-C3N4@HAp (96 %). Ag-g-C3N4@HAp nanocomposite has potential as a green photocatalyst for the removal of industrial wastewater pollutants.

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References

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Published

25-04-2026

How to Cite

Nui, P. X., Phi, P. T. Y., & Kien, P. T. (2026). High efficiency of Ag-g-C3N4@HAp as green catalyst for photodegradation of tetracycline. Vietnam Journal of Science and Technology, 64(2), 328–340. https://doi.org/10.15625/2525-2518/19492

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Environment

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