Journal
CHEMOSPHERE
Volume 280, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.130802
Keywords
Photocatalysts; UV-C irradiation; TiO2 nanotubes; MMT/TiO2 and MMT/TiO2-NTs; Rhodamine B
Categories
Funding
- Vietnam National University Ho Chi Minh City (VNU-HCM) [C2021-18-25]
- Departement de la Marne, Greater Reims, Region Grand Est
- European Regional Development Fund (ERDF Champagne Ardenne 2014-2020)
- European Union
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This study synthesized MMT/TiO2 and MMT/TiO2-NTs photocatalysts, finding that the degradation effectiveness of TiO2-NTs is significantly higher than that of TiO2 nanoparticles, while MMT/TiO2 shows slightly better photocatalytic performance compared to MMT/TiO2-NTs.
The aim of this paper is to synthesize montmorillonite/TiO2-nanoparticles (MMT/TiO2 and montmorillonite/TiO2-nanotubes (MMT/TiO2-NTs) photocatalysts through a simple wet agitation method based on TiO2 nanoparticles and MMT. They are likely to accumulate the effect of adsorption and photodegradation. Then, the photocatalysts are applied to degrade the rhodamine B in dye effluents. The structural characterizations of photocatalysts are investigated using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and energy-dispersive X-ray spectroscopy (EDX). The photocatalytic activities and effectiveness of photocatalysts are evaluated through rhodamine B degradation at different concentrations under dark and UV-C irradiation conditions. The results show that the synthesized TiO2-NTs have an average tube diameter of 5 nm and a tube length at least about 110 nm, which are intercalated into MMT sheets in MMT/TiO2-NTs photocatalyst. Meanwhile, TiO2 nanoparticles are immobilized on the surface of MMT sheets in the MMT/TiO2 photocatalyst. The photocatalytic effectiveness of rhodamine B degradation of TiO2-NTs shows a significantly enhance compared to that of TiO2 nanoparticles. However, photocatalytic performance of MMT/TiO2-NTs is lower than that of MMT/TiO2. The degradation effectiveness of MMT/TiO2 photocatalyst reaches to 100% for 3 ppm and 90% at 10 ppm of rhodamine B, while these values are 97.5% and 85.5%, respectively, recorded for MMT/TiO2-NTs.
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