Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination

In recent years, titanium dioxide has shown high photocatalytic effectiveness when applied to different decontamination processes. However, the relatively low surface area of this material compared with those of other metal oxides limits its adsorption capacity. The modification of titanium dioxides...

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Main Authors: Miguel Díaz-Sánchez, Isabel Hernández-Benítez, Diana Díaz-García, Sanjiv Prashar, Santiago Gómez-Ruiz
Format: Article
Language:English
Published: Elsevier 2022-09-01
Series:Catalysis Communications
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1566736722000826
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author Miguel Díaz-Sánchez
Isabel Hernández-Benítez
Diana Díaz-García
Sanjiv Prashar
Santiago Gómez-Ruiz
author_facet Miguel Díaz-Sánchez
Isabel Hernández-Benítez
Diana Díaz-García
Sanjiv Prashar
Santiago Gómez-Ruiz
author_sort Miguel Díaz-Sánchez
collection DOAJ
description In recent years, titanium dioxide has shown high photocatalytic effectiveness when applied to different decontamination processes. However, the relatively low surface area of this material compared with those of other metal oxides limits its adsorption capacity. The modification of titanium dioxides with carbon species with high surface porosity is an excellent option in generating photocatalysts with high adsorption capacity and a promising activation potential. In addition, carbon materials may improve electron lifetime in TiO2 by decreasing charge recombination and reducing the band gap. In the present study, material synthesis has been carried out using different quantities of a variety of carbon species which were supported on mesoporous aggregates of photocatalytically active fluorine-doped anatase nanoparticles with ultra-reactive anatase facets {001}. These systems showed an initial adsorption capacity of 15–25% which favours an efficient photodegradation. High activity was observed in the adsorption/photodegradation of organic pollutants with elimination of up to 95% of concentrated solutions of methylene blue and common emerging pollutants such as ciprofloxacin (88%) and naproxen (75%) under UV light (300 W) in 10 min. Moreover, the systems were also doped with palladium nanoparticles thus becoming effective heterogeneous catalysts in Suzuki-Miyaura reactions with good to excellent halide conversions (between 80 and 99% for the formation of biphenyl derivatives) and high TON values (up to 110) at short reaction times and low Pd loading.
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spelling doaj.art-244f9ae9f7f14dd6bd95f5ee8b239de72022-12-22T03:41:58ZengElsevierCatalysis Communications1873-39052022-09-01169106477Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontaminationMiguel Díaz-Sánchez0Isabel Hernández-Benítez1Diana Díaz-García2Sanjiv Prashar3Santiago Gómez-Ruiz4COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, SpainCOMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, SpainCOMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, SpainCOMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, SpainCorresponding author.; COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, SpainIn recent years, titanium dioxide has shown high photocatalytic effectiveness when applied to different decontamination processes. However, the relatively low surface area of this material compared with those of other metal oxides limits its adsorption capacity. The modification of titanium dioxides with carbon species with high surface porosity is an excellent option in generating photocatalysts with high adsorption capacity and a promising activation potential. In addition, carbon materials may improve electron lifetime in TiO2 by decreasing charge recombination and reducing the band gap. In the present study, material synthesis has been carried out using different quantities of a variety of carbon species which were supported on mesoporous aggregates of photocatalytically active fluorine-doped anatase nanoparticles with ultra-reactive anatase facets {001}. These systems showed an initial adsorption capacity of 15–25% which favours an efficient photodegradation. High activity was observed in the adsorption/photodegradation of organic pollutants with elimination of up to 95% of concentrated solutions of methylene blue and common emerging pollutants such as ciprofloxacin (88%) and naproxen (75%) under UV light (300 W) in 10 min. Moreover, the systems were also doped with palladium nanoparticles thus becoming effective heterogeneous catalysts in Suzuki-Miyaura reactions with good to excellent halide conversions (between 80 and 99% for the formation of biphenyl derivatives) and high TON values (up to 110) at short reaction times and low Pd loading.http://www.sciencedirect.com/science/article/pii/S1566736722000826Titanium dioxideFluorine dopingMesoporous carbon speciesCarbon nanotubesGraphenePhotocatalysis
spellingShingle Miguel Díaz-Sánchez
Isabel Hernández-Benítez
Diana Díaz-García
Sanjiv Prashar
Santiago Gómez-Ruiz
Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination
Catalysis Communications
Titanium dioxide
Fluorine doping
Mesoporous carbon species
Carbon nanotubes
Graphene
Photocatalysis
title Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination
title_full Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination
title_fullStr Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination
title_full_unstemmed Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination
title_short Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination
title_sort nanohybrids based on f doped titanium dioxides and carbon species with enhanced dual adsorption photodegradation activity for water decontamination
topic Titanium dioxide
Fluorine doping
Mesoporous carbon species
Carbon nanotubes
Graphene
Photocatalysis
url http://www.sciencedirect.com/science/article/pii/S1566736722000826
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AT isabelhernandezbenitez nanohybridsbasedonfdopedtitaniumdioxidesandcarbonspecieswithenhanceddualadsorptionphotodegradationactivityforwaterdecontamination
AT dianadiazgarcia nanohybridsbasedonfdopedtitaniumdioxidesandcarbonspecieswithenhanceddualadsorptionphotodegradationactivityforwaterdecontamination
AT sanjivprashar nanohybridsbasedonfdopedtitaniumdioxidesandcarbonspecieswithenhanceddualadsorptionphotodegradationactivityforwaterdecontamination
AT santiagogomezruiz nanohybridsbasedonfdopedtitaniumdioxidesandcarbonspecieswithenhanceddualadsorptionphotodegradationactivityforwaterdecontamination