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Photodegradation of Rhodamine B and Bisphenol A Over Visible-Light Driven Bi7O9I3-and Bi12O17Cl2-Photocatalysts Under White LED Irradiation

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Abstract

Two different bismuth oxyhalides photocatalysts Bi7O9I3 and Bi12O17Cl2 were obtained by oil bath and hydrothermal methods. The micro/nano-structures obtained were characterized by XRD, SEM, DRS and XPS. The XRD patterns are identical to those already reported. SEM revealed the formation of hierarchical micro/nano structures for Bi7O9I3 and nanobelts for Bi12O17Cl2. Band gap values were determined for both catalysts from DRS and XPS data. The photocatalytic degradation of Rhodamine B and Bisphenol A were studied with both bismuth oxyhalides and compared with commercial titanium dioxide (TiO2). As light source was used a white Light-Emiting Diode lamp. As expected, a poor photocatalytic degradation was obtained in presence of TiO2, but significant drops of concentrations in presence of the bismuth oxyhalides was observed. However, the mineralization of both polluntants was higher in presence of Bi12O17Cl2 than with Bi7O9I3. In addition, a great part of Rhodamine B was removed by Bi7O9I3 in the dark, which is attributed to its morphological features. In contrast, Bisphenol A was degraded under visible light irradiation without significant adsorption.

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Acknowledgements

Thanks to the laboratory technicians of Ikiam University and from the Leibniz-Institut für Polymerforschung (IPF-Dresden), especially Mrs. Cornelia Schlendstedt. To the “Research Laboratory of Instituto Nacional de Patrimonio Cultural (Ecuador)”, for the support in instrumental characterization. MZ and DT, were part of #BIOX, which is one of the HiWater's undergraduate research programs.

Funding

The “HiWater: Efficient and affordable water treatment technologies to minimise waterborne diseases'' consortium (SENESCyT: EULACHT02-0143) provided the resources to develop this research work. MZ, DT, received a fellowship from HiWater/SENESCyT.

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Authors and Affiliations

  1. Hi Water Consortium, Universidad Regional Amazónica Ikiam, Muyuna Road km 7, Tena, Napo, 150150, Ecuador

    Damian Tuba-Guaman, Michael Zuarez-Chamba, Luis Quishpe-Quishpe, Miguel Herrera-Robledo & Pablo A. Cisneros-Pérez

  2. School of Physical Sciences and Nanotechnology, Yachay Tech University, Urcuquí, 100650, Ecuador

    Carlos Reinoso

  3. Departamento de Física, Escuela Politécnica Nacional, Quito, 17012759, Ecuador

    Cristian P. Santacruz

  4. School of Chemical Sciences and Engineering, Yachay Tech University, Urcuquí, 100650, Ecuador

    Pablo A. Cisneros-Pérez

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DTG: conceptualization, data curation, methodology, investigation, writing-original draft. MZC: Investigation. LQQ: Methodology. CR: Investigation. CPS: Investigation. MHR: supervision, writing—review & editing. Pablo A. Cisneros-Perez: supervision, writing—review & editing.

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Tuba-Guaman, D., Zuarez-Chamba, M., Quishpe-Quishpe, L. et al. Photodegradation of Rhodamine B and Bisphenol A Over Visible-Light Driven Bi7O9I3-and Bi12O17Cl2-Photocatalysts Under White LED Irradiation. Top Catal 65, 1028–1044 (2022). https://doi.org/10.1007/s11244-022-01689-0

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