Photocatalytic Degradation of Methyl Orange Using TiO2 - Coated Cordierite Substrates: A Comparison of Dip-Coating and Spray-Coating Methods

Trung Hieu Nguyen; Thu Huong Nguyen; Anh-Tuan Vu; Thang Le Minh

doi:10.9767/bcrec.20400

DOI: https://doi.org/10.9767/bcrec.20400

Photocatalytic Degradation of Methyl Orange Using TiO2 - Coated Cordierite Substrates: A Comparison of Dip-Coating and Spray-Coating Methods

Trung Hieu Nguyen¹ , Thu Huong Nguyen²

, Anh-Tuan Vu²

, Thang Le Minh²

¹School of Materials Science and Engineering, Hanoi University of Science and Technology, Hanoi, Viet Nam

²School of Chemistry and Life Sciences, Hanoi University of Science and Technology, Hanoi, Viet Nam

Received: 20 May 2025; Revised: 3 Sep 2025; Accepted: 6 Sep 2025; Available online: 11 Sep 2025; Published: 26 Dec 2025.

Editor(s): Istadi Istadi

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract

In this study, the calcination temperature of TiO₂nanoparticles was investigated at 300, 350, 400, and 450 °C. The results indicated that 400 °C was the optimal calcination temperature, yielding the highest amount of synthesized TiO₂ nanoparticles remaining in the anatase phase (97.44 %). TiO₂ nanoparticles were coated on cordierite using two methods: spray coating and dip coating. Their characteristics were analyzed and evaluated utilizing several modern techniques. Additionally, their photocatalytic and recovery capabilities were assessed based on methylene orange (MO) degradation efficiency. The spray coating method allowed the TiO₂ nanoparticles to evenly cover the cordierite surface, resulting in the highest MO degradation efficiency and best recovery ability. The MO degradation efficiency remained at 83.07 % after 5 reuse cycles. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Keywords: Titanium oxide; Methyl Orange; Photocatalytic; Coating

Funding: Hanoi University of Science and Technology, Laboratory of Catalysis under the RoHan Project

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Section: Original Research Articles

Language : EN

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