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2. From Anatase TiO 2 Nano-Cuboids to Nano-Bipyramids: Influence of Particle Shape on the TiO 2 Photocatalytic Degradation of Emerging Contaminants in Contrasted Water Matrices.

Author

Asghar, Humaira, Hermosilla, Daphne, Pellegrino, Francesco, Muelas-Ramos, Virginia, de los Ríos, Christian, Gascó, Antonio, Maurino, Valter, and Iqbal, Muhammad Ahsan

Abstract

Water pollution, resulting from industrial effluents, agricultural runoff, and pharmaceutical residues, poses serious threats to ecosystems and human health, highlighting the need for innovative approaches to effective remediation, particularly for non-biodegradable emerging pollutants. This research work explores the influence of shape-controlled nanocrystalline titanium dioxide (TiO2 NC), synthesized by a simple hydrothermal method, on the photodegradation efficiency of three different classes of emerging environmental pollutants: phenol, pesticides (methomyl), and drugs (sodium diclofenac). Experiments were conducted to assess the influence of the water matrix on treatment efficiency by using ultrapure water and stormwater (basic) collected from an urban drainage system as matrices. The size and shape of the nano-cuboids were accurately controlled during synthesis to assess their impact on photoactivity and selectivity. Regarding total organic carbon removal using TiO2 nano-cuboids in basic environments, the results were particularly remarkable. TiO2 nano-cuboids and truncated bipyramids synthesized in the 200–250 °C temperature range showed an enhanced photocatalytic efficiency when compared to alternative formulations. Diclofenac, methomyl, and phenol were fully mineralized from ultrapure water and basic stormwater. The TiO2 nano-cuboids/nano-bipyramids demonstrated better selectivity and photoactivity in comparison to irregular TiO2 nanoparticles. The differences in photoactivity and selectivity are explained in terms of charge carrier separation and trapping on the different crystal facets. Their performance demonstrates their potential as sustainable materials for the photodegradation of emerging pollutants in various water matrices. [ABSTRACT FROM AUTHOR]

Published
2025
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4. Contributors

Author

Aguilera, David R., primary, Anand, Aljo, additional, Avila, Alba, additional, Bahadori, E., additional, Bandehali, Samaneh, additional, Bedia, Jorge, additional, Belver, Carolina, additional, Boccardo, Gianluca, additional, Bonelli, Barbara, additional, Bosch, Julian, additional, Caldera, Fabrizio, additional, Corsi, Ilaria, additional, Crevacore, Eleonora, additional, Dutta, Joydeep, additional, Falciola, Luigi, additional, Fiorati, Andrea, additional, Freyria, Francesca S., additional, Fujisaki, Asako, additional, Gadhi, Tanveer A., additional, Giraldo, Felipe Muñoz, additional, Gómez-Avilés, Almudena, additional, Grassi, Giacomo, additional, Hamd, Wael S., additional, Hosseini, Sayed Mohsen, additional, Mahar, Rasool Bux, additional, Marchisio, Daniele L., additional, Messina, Francesca, additional, Moghadassi, Abdolreza, additional, Muelas-Ramos, Virginia, additional, Muqeet, Muhammad, additional, Noll, Hendrik M., additional, Parvizian, Fahime, additional, Pedrazzo, Alberto Rubin, additional, Peñas-Garzón, Manuel, additional, Pifferi, Valentina, additional, Plazas-Tuttle, Jaime, additional, Prelot, Benedicte, additional, Punta, Carlo, additional, Rajchakit, Urawadee, additional, Ramis, G., additional, Raoof, Amir, additional, Rodriguez, Juan J., additional, Rossetti, I., additional, Sacco, Olga, additional, Sahoo, Tapas Ranjan, additional, Sannino, Diana, additional, Sannino, Filomena, additional, Sarojini, Vijayalekshmi, additional, Sethi, Rajandrea, additional, Testolin, Anna, additional, Tosco, Tiziana, additional, Trotta, Francesco, additional, and Vaiano, Vincenzo, additional

Published
2020
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5. List of contributors

Author

Bedia, Jorge, primary, Belver, Carolina, additional, Boccia, Giovanni, additional, Carotenuto, Maurizio, additional, Daniel, Christophe, additional, Federica, Carraturo, additional, Francesco, Aliberti, additional, Galdiero, Emilia, additional, Gambino, Edvige, additional, Gesuele, Renato, additional, Gómez-Avilés, Almudena, additional, Guida, Marco, additional, Gupta, Raju Kumar, additional, Iervolino, Giuseppina, additional, Kar, Prasenjit, additional, Libralato, Giovanni, additional, Lofrano, Giusy, additional, Meric, Sureyya, additional, Muelas-Ramos, Virginia, additional, Murcia, Julie J., additional, Navarra, Wanda, additional, Peñas-Garzón, Manuel, additional, Rodriguez, Juan J., additional, Sacco, Olga, additional, Sannino, Diana, additional, Sathiyan, Govindasamy, additional, Siciliano, Antonietta, additional, Vaiano, Vincenzo, additional, and Venditto, Vincenzo, additional

Published
2020
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7. Solar-Assisted Photodegradation of Pesticides Over Pellet-Shaped TiO2-Kaolin Catalytic Macrocomposites at Semi-pilot-Plant Scale: Elucidation of Photo-Mechanisms and Water Matrix Effect

Author

Jiménez Bautista, Karla Cecilia, Gascó, Antonio, Ramos, Daniel R., Palomo, E., Muelas-Ramos, Virginia, Canle, Moisés, Hermosilla, Daphne, Bahamonde Santos, Ana María, Jiménez Bautista, Karla Cecilia, Gascó, Antonio, Ramos, Daniel R., Palomo, E., Muelas-Ramos, Virginia, Canle, Moisés, Hermosilla, Daphne, and Bahamonde Santos, Ana María

Abstract

[Abstract] The behavior of novel pellet-shaped bulky titania-kaolin photocatalysts is herein evaluated for its application in the solar-assisted photocatalytic treatment of a bio-recalcitrant pesticide mix (imidacloprid, pyrimethanil and methomyl) in solar lab-scale and semi-pilot scale raceway pond photoreactors. The photocatalyst consists of 1 cm long titania-kaolin macro-composites that combine some advantages of both nanoparticulate and supported catalysts without being either. This opening the opportunity to extend the use of this photocatalyst to complex wastewater effluents. In addition, their stability and reusability potential was also evaluated, and reactive species leading to the solar-degradation of each pesticide were also identified using radical scavengers. Total removal of pesticides (2 mg L−1 each) with an optimal pellets dosage of 34.8 g L−1 was addressed, whether in ultrapure water (180–270 min of solar irradiation) or in two basic pH Municipal Wastewater Treatment Plant (MWWTP) effluents (≤300 min of solar irradiation) where methomyl was always the most recalcitrant pesticide. Lower Total Organic Carbon (TOC) removal (≈53–56%) was also found under the effect of these complex MWWTP effluents than in ultrapure water (>60%). Those results are very promising when comparing to the almost negligible TOC removal achieved with the Titania powder under basic MWWTP effluents due to the strong effect of particle aggregation. Very good photocatalyst stability and durability was shown along three consecutive cycles after applying a low-cost recovery protocol consisting of several washing and drying cycles without addressing a significant photoefficiency loss (TOC≈60-56%). The application of scavengers revealed that hydroxyl radical generated from photoinduced holes was the dominant species in the degradation of pyrimethanil and methomyl whereas reactive oxygen species formed from conduction band electrons were mainly involved in the photo-oxidation of imidacl

Published
2023

8. Degradación de contaminantes emergentes usando materiales híbridos órgano-metálicos (MOFs) mediante fotocatálisis

Author

Muelas Ramos Virginia, Virginia, Belver Coldeira, Carolina, Bedia García-Matamoros, Jorge, and UAM. Departamento de Química Física Aplicada

Subjects
Química, Fotocatálisis, Contaminantes orgánicos del agua
Abstract

Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Química Física Aplicada. Fecha de Lectura: 16-12-2022, La realización de este trabajo ha sido posible gracias al apoyo económico del Ministerio de Economía y Competitividad (MINECO) a través del proyecto CTQ2016-78576-R, a la Agencia Estatal de Investigación (AEI) por el proyecto PID2019-106186RB-I00/AEI/10.13039/501100011033 y a la concesión de un contrato de Formación de Personal Investigador (FPI) del MINECO (Referencia BES-2017- 082613)

Published
2022

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