STUDY ON FABRICATION OF ZnO NANOMATERIALS  BY ULTRASOUND-ASSISTED PRECIPITATION METHOD FOR PHOTOCATALYTIC DEGRADATION OF TARTRAZINE DYE IN WATER

Phạm Hương Quỳnh; Đặng Văn Thành; Nguyễn Thị Thu Phương; Tạ Thị Hường; Trần Ý Đoan Trang; Phạm Thị Thanh Yên; Phạm Nguyệt Ánh; Chu Tường Mai; Vũ Thị Thúy

doi:10.34238/tnu-jst.12007

STUDY ON FABRICATION OF ZnO NANOMATERIALS BY ULTRASOUND-ASSISTED PRECIPITATION METHOD FOR PHOTOCATALYTIC DEGRADATION OF TARTRAZINE DYE IN WATER

About this article

Received: 11/02/25 Revised: 28/03/25 Published: 03/04/25

Authors

1. Pham Huong Quynh, Hanoi University of Industry
2. Dang Van Thanh, 1) TNU - University of Medicine and Pharmacy, 2) VNU University of Science, Hanoi,
3. Nguyen Thi Thu Phuong, Hanoi University of Industry
4. Ta Thi Huong, Hanoi University of Industry
5. Tran y Doan Trang, Hanoi University of Industry
6. Pham Thi Thanh Yen, Hanoi University of Industry
7. Pham Nguyet anh, Thuyloi University
8. Chu Tuong Mai, Thuyloi University
9. Vu Thi Thuy , 1) TNU - University of Medicine and Pharmacy, 2) TNU - University of Sciences

Abstract

In this research, we present the results of fabrication of ZnO (UZO) nanomaterials by ultrasound-assisted precipitation method for treatment of Tartrazine dye (Tar) in water. XRD and SEM results show that the obtained UZO material is in the form of nanoparticles with a size of 50-120 nm with hexagonal wurtzite ZnO structure and ultrasound plays an important role in crystal formation and affects the morphological properties of the fabricated materials. The photocatalytic ability of UZO was evaluated through the decomposition reaction of Tar dye in water with a treatment efficiency of 99.62% for an initial concentration of 20 ppm, 180 minutes using UVA light. The mechanism of Tar decomposition under illumination is explained as the light stimulation causes photoelectrons to be transferred to the conduction band from the valence band while positively charged holes formed in the valence band move to the material surface to participate in the pollutant oxidation-reduction reaction. The obtained results show the potential application of UZO in practice.

Keywords

Photocatalytic; Ultrasound; Precipitation; ZnO; Tartrazine

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DOI: https://doi.org/10.34238/tnu-jst.12007

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