Enhanced photocatalytic degradation of methylene blue in textile wastewater using high-crystallinity TiO2 nanotubes synthesized by post-hydrothermal treatment

Eddy Nana Priayatna; Hernowo Widodo

doi:10.61511/wass.v1i2.2024.1662

Authors

Eddy Nana Priayatna Department of Chemical Engineering, Faculty of Engineering, Universitas Bhayangkara Jakarta Raya, South Jakarta, DKI Jakarta 12140, Indonesia
Hernowo Widodo Department of Chemical Engineering, Faculty of Engineering, Universitas Bhayangkara Jakarta Raya, South Jakarta, DKI Jakarta 12140, Indonesia

DOI:

https://doi.org/10.61511/wass.v1i2.2024.1662

Keywords:

TiO2 nanotubes, post-hydrothermal, methylene blue wastewater

Abstract

Background: The textile industry has seen rapid progress but is also responsible for wastewater pollution, especially from dye substances such as methylene blue, which are difficult to degrade. The need for efficient wastewater treatment is crucial in addressing environmental issues related to textile production. Photocatalysis is one promising method for wastewater treatment, utilizing titanium dioxide (TiO₂) as a photocatalyst. One approach to enhance the photocatalytic activity of TiO₂is to modify its structure into nanotubes, which offer a high surface area-to-volume ratio. This study aims to synthesize TiO2 nanotubes with high crystallinity for improved photocatalytic performance. Methods: TiO₂nanotubes were synthesized using a post-hydrothermal treatment process, followed by characterization using scanning electron microscopy (SEM) to evaluate the morphology of the nanotubes. The degradation of methylene blue was used as a model for evaluating the photocatalytic activity of the synthesized TiO₂ nanotubes under optimal conditions. Findings: The SEM characterization revealed that TiO₂ nanotubes synthesized at 100°C exhibited the best structure, leading to superior photocatalytic performance. These nanotubes were effective in degrading methylene blue, demonstrating a higher degradation rate compared to other conditions. Conclusion: The post-hydrothermal synthesis of TiO₂ nanotubes at 100°C results in enhanced photocatalytic activity, making it a promising material for textile wastewater treatment, specifically for methylene blue degradation. Novelty/Originality of this article: This study presents a novel application of TiO₂ nanotubes synthesized through post-hydrothermal treatment to address the degradation of methylene blue in textile industry wastewater. The use of optimized synthesis conditions for improved photocatalytic performance contributes new insights into the field of wastewater treatment technologies.

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