ENHANCED REMOVAL OF DYE USING Bi3+-DOPED ZrO2@GO NANOCOMPOSITES PREPARED BY ULTRASOUND-ASSISTED HYDROTHERMAL METHOD

Chu Mạnh Nhương; Lê Thu Huyền; Nguyễn Thị Ánh Tuyết

doi:10.34238/tnu-jst.11618

ENHANCED REMOVAL OF DYE USING Bi3+-DOPED ZrO2@GO NANOCOMPOSITES PREPARED BY ULTRASOUND-ASSISTED HYDROTHERMAL METHOD

About this article

Received: 27/11/24 Revised: 03/01/25 Published: 04/01/25

Authors

1. Chu Manh Nhuong, TNU - University of Education
2. Le Thu Huyen , Ha Trung Primary & Secondary School, Ha Long, Quang Ninh
3. Nguyen Thi anh Tuyet, TNU - University of Medicine and Pharmacy

Abstract

This publication further investigates the chemical composition, energy reflection/diffusion properties and surface charge of Bi³⁺-doped ZrO₂@GO nanocomposites (ZrO₂@GO:Bi³⁺) have been synthesized by ultrasound-assisted hydrothermal method, aiming to exploit the photocatalytic applications. The EDX spectra confirm that the ZrO₂@GO:Bi³⁺ nanocomposites have high purity with the main chemical components (Zr, Bi, C, O), which are evenly dispersed in the sample matrix. The zeta potential distribution spectra demonstrate that the surface charge of ZrO₂@GO:Bi³⁺ materials had highly negative surface charges with zeta potential values ranging from –2.77 mV to –16.03 mV. The diffuse reflectance spectra show that Bi³⁺ ion doping reduced the band gap of ZrO₂@GO from 2.50 eV to about 2.13–2.00 eV in the ZrO₂@GO:Bi³⁺ nanocomposites. The ZrO₂@GO:Bi³⁺ nanocomposites have a negatively charged surface, suitable for treating positively charged dyes such as Rhodamine B. The adsorption efficiency of Rhodamine B on the surface of ZrO₂@GO:Bi³⁺ nanocomposites reaches 35.97% - 39.70%. The Bi³⁺ ions improve the photocatalytic ability of ZrO₂@GO:Bi³⁺ material, while the Rhodamine B decomposition reaction reaches 91.84% efficiency and followed the first order kinetic equation, when illuminated with xenon lamp for 180 minutes. The ZrO₂@GO:Bi³⁺ materials has excellent properties and great potential in treating wastewater contaminated with dyes and organic substances that are difficult to decompose.

Keywords

ZrO2@GO; Bi3+; Activity Photocatalytic; Rhodamine B

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DOI: https://doi.org/10.34238/tnu-jst.11618

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