Solar photocatalytic degradation of pesticides over TiO2-rGO nanocomposites at pilot plant scale

Luna-Sanguino, G.; Ruíz-Delgado, A.; Tolosana-Moranchel, A.; Pascual, L.; Malato, S.; Bahamonde, A.; Faraldos, Marisol

doi:10.1016/j.scitotenv.2020.140286

Cited by 68 publications

(19 citation statements)

References 46 publications

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“…At the same time, HBK-rGO showed hydrodynamic particle sizes of 1.46 ± 0.16 μm, which turn to 0.71 ± 0.10 μm in aqueous suspensions. These are the same ranges of those previously reported for HBK TiO 2 …”

Section: Results and Discussionsupporting

confidence: 90%

“…The synthesized HBK-rGO nanocomposite addressed similar structural properties than the original commercial HBK TiO 2 , that is, it was characterized by its pure anatase crystal phase with small crystal sizes (8 nm), a high BET surface area ( S BET = 241 m 2 g –1 ), and significant contributions of microporosity and mesoporosity to its total pore volume.…”

Section: Results and Discussionmentioning

confidence: 98%

“…Titania-reduced graphene oxide with a 0.1 wt % amount of GO was synthesized by the hydrothermal methodology, according to the previously described procedure in Luna-Sanguino et al The so-prepared catalyst is herein identified as HBK-rGO.…”

Section: Experimental Sectionmentioning

confidence: 99%

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Photocatalytic Degradation of Alachlor over Titania-Reduced Graphene Oxide Nanocomposite: Intrinsic Kinetic Model and Reaction Pathways

Villajos

Tolosana-Moranchel

Canle

et al. 2021

Ind. Eng. Chem. Res.

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An intrinsic kinetic model based on a proposed reaction photomechanism explicitly dependent on the volumetric rate of photon absorption (VRPA) has been performed and analyzed for the photocatalytic degradation of alachlor in water. A titania-reduced graphene oxide nanocomposite (HBK TiO 2 −rGO) was used as the photocatalyst. The proposed degradation pathway was elucidated addressing H* − abstraction, HO* substitution, C− C scission, C−N bond scission, and dealkylation reactions. A suitable kinetic model has successfully been validated by fitting the obtained experimental data to reproduce the evolution of alachlor photodegradation at different HBK-rGO loadings. After simplification, the proposed kinetics were adjusted to a reasoned simplified model of 1−2 parameters, showing very good fitting between predicted and experimental values, as denoted by the resulting lower root-square-mean errors. Finally, the synthesized nanocomposite addressed very good stability and durability applied to the degradation of alachlor by photo-oxidation along six consecutive cycles of reuse.

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Section: Results and Discussionsupporting

confidence: 90%

Section: Results and Discussionmentioning

confidence: 98%

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Photocatalytic Degradation of Alachlor over Titania-Reduced Graphene Oxide Nanocomposite: Intrinsic Kinetic Model and Reaction Pathways

Villajos

Tolosana-Moranchel

Canle

et al. 2021

Ind. Eng. Chem. Res.

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“…[7] In this work, TiO2/rGO nanocomposites were synthesized by hydrothermal route. [8] The photodegradation performance was conducted based on methylene blue (MB) as a popular organic dye. The effects of initial precursors on the degradation of MB via the adsorption and photocatalyst studies were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Binary TiO₂/reduced graphene oxide nanocomposite for improving methylene blue photodegradation

Trinh

Viet

Nhu

et al. 2021

Vietnam Journal of Chemistry

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Herein, TiO2/reduced graphene oxide (TiO2/rGO) nanocomposites were fabricated using the hydrothermal method and investigated with the amount of titanium precursors. The binary nanocomposites were characterized by modern analysis method. The adsorption capacity and photocatalyst degradation were performed based on methylene blue. The appropriate as‐prepared material with 1.5 mL TIP contained a large specific surface area (110.549 m2/g) with TiO2 ranging 4‐25 nm homogenously grafting on the rGO surface. The adsorption results were shown in good accordance with the pseudo‐second‐order while the photoreaction kinetics pursued the pseudo‐first‐order with a high‐rate constant. After the adsorption state, the yield reaches 62.1 % and under UV light for 90 min, 96.8 % of MB was efficiently degraded from water media, which showed a more impressive effect as compared with P25 and rGO. Therefore, the use of TiO2/rGO could be applied in the mass‐scale treatment of organic pollutants in wastewater.

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“…However, with rapid growing explosive industrial growth that mainly depends on industrial fossil fuels have severely caused global environmental pollution. The vast majority of toxic waste emitted into the air and water, destroying nature's ecology and causing various health and survival problems for livings organism (Eren et al 2020, Fu et al 2019, Guo et al 2020, Hasan et al 2021, Lin et al 2018, Luna-Sanguino et al 2020, Velasco-Hernández et al 2020). To overcome these environmental problems, photo catalytic technology has been widely emerged due to its high safety, cleanliness, and useful effects.…”

Section: Introductionmentioning

confidence: 99%

Enhanced ultraviolet-visible photocatalysis of RGO/equaixial geometry TiO2 composites on degradation of organic dyes in water

Hasan

Wang

et al. 2021

Environ Sci Pollut Res

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The reduced graphene oxide dopped equaixial geometry TiO 2 (rGO/egTiO 2 ) composite as photocatalyst was synthesized hydrothermally with various mass ratios of tetrabutyl titanate. The photocatalyst is considered to be rGO/equaixial geometry TiO 2 in terms of modifying the combined reduced graphene Oxide and TiO 2 . The rGO plays a vital role in rGO/egTiO 2 composite as photocatalysts were analyzed in methylene blue (MB) and rhodamine B (RhB) photocatalytic degradation under UV and simulated solar light irradiation. This synthesized catalyst was characterized by various analytical techniques such as XPS, XRD, SEM, BET and TEM. The rGO/egTiO 2 composite exhibits enhanced photo-catalytic performance with degradation rate of 97.5 and 97% on RhB and MB for 60 min under UV radiation respectively, while the degradation rate of 94 and 92 % was observed on the same dyes for 6 h under the simulated sunlight radiation. The enhanced photocatalytic performance of the rGO/egTiO 2 composite under ultraviolet irradiation source was owing to a high separation e ciency of the photo-induced electron-hole pairs, while the photocatalytic performance under simulated sunlight radiation was due to the photosensitive and charge separator behavior of rGO. This offers us an excellent potential of signi cant photo catalytic activity for the removal of organic contaminants from wastewater.

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Solar photocatalytic degradation of pesticides over TiO2-rGO nanocomposites at pilot plant scale

Cited by 68 publications

References 46 publications

Photocatalytic Degradation of Alachlor over Titania-Reduced Graphene Oxide Nanocomposite: Intrinsic Kinetic Model and Reaction Pathways

Photocatalytic Degradation of Alachlor over Titania-Reduced Graphene Oxide Nanocomposite: Intrinsic Kinetic Model and Reaction Pathways

Binary TiO₂/reduced graphene oxide nanocomposite for improving methylene blue photodegradation

Enhanced ultraviolet-visible photocatalysis of RGO/equaixial geometry TiO2 composites on degradation of organic dyes in water

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Solar photocatalytic degradation of pesticides over TiO2-rGO nanocomposites at pilot plant scale

Cited by 68 publications

References 46 publications

Photocatalytic Degradation of Alachlor over Titania-Reduced Graphene Oxide Nanocomposite: Intrinsic Kinetic Model and Reaction Pathways

Photocatalytic Degradation of Alachlor over Titania-Reduced Graphene Oxide Nanocomposite: Intrinsic Kinetic Model and Reaction Pathways

Binary TiO2/reduced graphene oxide nanocomposite for improving methylene blue photodegradation

Enhanced ultraviolet-visible photocatalysis of RGO/equaixial geometry TiO2 composites on degradation of organic dyes in water

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Binary TiO₂/reduced graphene oxide nanocomposite for improving methylene blue photodegradation