Photocatalytic degradation kinetics and mechanisms of fungicide tebuconazole in aqueous TiO2 suspensions

Stamatis, Nikolaos; Αντωνοπούλου, Μαρία; Konstantinou, Ioannis

doi:10.1016/j.cattod.2014.09.023

Cited by 45 publications

(20 citation statements)

References 23 publications

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“…Commercial triazole fungicides are represented by a diverse group of compounds applied for vegetable and fruit protection or material preservation (e.g., wood) (Han et al 2014;Stamatis et al 2015). Tebuconazole belongs to the triazole group of biocides and is used for the control of mildew, rust, net blotch, root rot, and seed-borne diseases.…”

Section: Introductionmentioning

confidence: 99%

Dicationic triazolium fungicidal ionic liquids with herbicidal properties

et al. 2019

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The purpose of the present study was to synthesize the dicationic ionic liquids exhibiting herbicidal and fungicidal activities. A homologue series of ten dicationic ionic liquids was synthesized using commercial triazole fungicide (tebuconazole) and evaluated in terms of their possible antifungal and herbicidal activities. Dicationic triazolium compounds containing different linkers were prepared via acid-base reaction between the corresponding dicationic hydroxides and herbicides in the form of free acids. Additionally, the ionic liquids were fully characterized using NMR and thermal analysis. The herbicidal efficacy was tested during greenhouse experiments, using lambsquarters and oilseed rape as the test plants. In the case of determination of antifungal activity, six fungal species were used: Sclerotinia sclerotiorum, Botrytis cinerea, Fusarium culmorum, Fusarium oxysporum, Colletotrichum sp. and Monographella nivalis. The obtained results indicate that the conversion of compounds into dicationic ionic liquids affects their fungicidal and herbicidal activity. In the case of tests carried out on fungi, no difference in activity was observed at higher doses, except Monographella nivalis. However, at lower concentration (10 ppm), there is a reduction in efficacy compared to the reference substance. In addition, all obtained compounds are characterized by high activity.

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Section: Introductionmentioning

confidence: 99%

Dicationic triazolium fungicidal ionic liquids with herbicidal properties

et al. 2019

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“…Heterogeneous photocatalysis has been proven to be effective for the degradation of a variety of toxic substances, including insecticides, fungicides and herbicides, under artificial or solar irradiation (Berberidou et al 2015;Stamatis et al 2015). However, many target compounds were not completely mineralized during the photocatalytic reaction time (Šojić et al 2009;Yang et al 2010).…”

Section: Introduction Fluopyrammentioning

confidence: 99%

Mechanism and identify photolysis products of fluopyram under TiO2: Experiments, DFT and ab initio Molecular dynamics study

Pang¹,

Dong²,

Desk³

2019

SDRP-JESES

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Fluopyram is one of the widely used fungicides and it is persistence in water and soil. In this study, the photocatalytic degradation of fluopyram by TiO 2 was investigated under simulated solar light irradiation. Six transformation products (TPs) were identified by means of high performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS) and the quantum chemistry calculations (DFT and AIMD method). The formation of these TPs involved the hydroxyl-substitution of Cl atom, intramolecular cyclization, cleavage of amido bond, loss of trifluorotoluene, and attack of hydroxyl group on benzene ring. And then, a tentative pathway of the photocatalytic degradation was proposed. The toxicity of fluopyram and its TPs were predicted using in silico test. The results showed that potentially more toxic intermediates formed during photocatalytic degradation. These data suggested that more information about TPs of fluopyram and their toxicity should be obtained.

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“…Many synthetic dyes which are extensively present in industrial effluents such as those of the textile, pharmaceutical and chemicals industries may cause carcinogenicity and toxicity problems for many organisms. Advanced oxidation processes are greatly applied for elimination of organic dyes from effluents . Photocatalysts are stable, abundant, clean and safe, which are simply activated in the presence of sunlight and highly preferred in terms of their being sustainable, non‐hazardous and economic.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning preparation of NiO/ZnO composite nanofibers for photodegradation of binary mixture of rhodamine B and methylene blue in aqueous solution: Central composite optimization

Sabzehmeidani

Karimi

Ghaedi

2018

Applied Organom Chemis

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One-dimensional nanofiber of p-type NiO/n-type ZnO heterojunctions with various molar ratios of Ni to Zn at different calcination temperatures were successfully synthesized using the electrospinning method, and they were fully characterized. The photocatalysts thus obtained were applied in aqueous solutions for rhodamine B (RDB) and methylene blue (MB) degradation. The p-n heterojunctions built among the cubic structure NiO and hexagonal structure ZnO in the composite nanofiber are responsible for generation of electrons and holes and subsequently superoxide and hydroxyl radical production by carriers which lead to degradation of the dyes in solution. The composite nanofibers (ZnNi1) calcined at 550°C for 3 h showed the highest photocatalytic activity for degradation of the dyes in aqueous solution. The optimum values were found to be 180 min, 7.0, 1 g l −1 and 3.0 and 3.0 mg l −1 for irradiation time, pH, photocatalyst dosage and initial concentration of RDB and MB, respectively. For these optimum conditions, the photocatalytic degradation of RDB and MB was found to be 99.37 and 98.44%, respectively. The maximum photodegradation of RDB and MB using ZnNi1 was 59.41 and 65.43%, respectively. First-order kinetics based on the Langmuir-Hinshelwood model successfully fitted the experimental data.

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Photocatalytic degradation kinetics and mechanisms of fungicide tebuconazole in aqueous TiO2 suspensions

Cited by 45 publications

References 23 publications

Dicationic triazolium fungicidal ionic liquids with herbicidal properties

Dicationic triazolium fungicidal ionic liquids with herbicidal properties

Mechanism and identify photolysis products of fluopyram under TiO2: Experiments, DFT and ab initio Molecular dynamics study

Electrospinning preparation of NiO/ZnO composite nanofibers for photodegradation of binary mixture of rhodamine B and methylene blue in aqueous solution: Central composite optimization

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