The photocatalytic degradation of wastewater containing three industrial dyes belonging to different families, methyl orange (MO), methylene blue (MB) and Rhodamine B (RhB), was studied under UV-Vis irradiation using synthesised silver chloride nanoparticles. The nanocatalyst was prepared by a dissolution/reprecipitation method starting from the bulk powder and the ionic liquid trihexyl(tetradecyl)phosphonium chloride, [P6 6 6 14]Cl, without addition of other solvents. The obtained catalyst was characterised by UV-Vis absorbance, X-ray powder diffraction, transmission electron microscopy and scanning electron microscopy. The decolourisation of the samples was studied by UV-Vis absorbance at the corresponding wavelength. Starting from 10 ppm dye solutions and 1 g L−1 of the synthesised AgCl nanoparticles, degradation efficiencies of 98.4% for MO, 98.6% for MB and 99.9% for RhB, were achieved in 1 h. The degradation mechanisms for the different dyes were studied. Comparison with other frequently used nanocatalysts, namely P-25 Degussa, TiO2 anatase, Ag and ZnO, highlights the strong catalytic activity of AgCl nanoparticles. Under the same experimental conditions, these nanoparticles led to higher (more than 10%) and faster degradations.
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Research Article|
October 25 2016
Photocatalytic degradation of methyl orange, methylene blue and rhodamine B with AgCl nanocatalyst synthesised from its bulk material in the ionic liquid [P6 6 6 14]Cl
Borja Rodríguez-Cabo;
Borja Rodríguez-Cabo
1Chemical Engineering Department, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Iago Rodríguez-Palmeiro;
Iago Rodríguez-Palmeiro
1Chemical Engineering Department, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Raquel Corchero;
Raquel Corchero
1Chemical Engineering Department, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Rosario Rodil;
2Department of Analytical Chemistry, Nutrition and Food Science, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
E-mail: [email protected]
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Eva Rodil;
Eva Rodil
1Chemical Engineering Department, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Alberto Arce;
Alberto Arce
1Chemical Engineering Department, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Ana Soto
Ana Soto
1Chemical Engineering Department, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Water Sci Technol (2017) 75 (1): 128–140.
Article history
Received:
May 12 2016
Accepted:
October 07 2016
Citation
Borja Rodríguez-Cabo, Iago Rodríguez-Palmeiro, Raquel Corchero, Rosario Rodil, Eva Rodil, Alberto Arce, Ana Soto; Photocatalytic degradation of methyl orange, methylene blue and rhodamine B with AgCl nanocatalyst synthesised from its bulk material in the ionic liquid [P6 6 6 14]Cl. Water Sci Technol 9 January 2017; 75 (1): 128–140. doi: https://doi.org/10.2166/wst.2016.499
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