Photocatalytic degradation of Prozac® mediated by TiO2 nanoparticles obtained via three synthesis methods: sonochemical, microwave hydrothermal, and polymeric precursor

Moreira, Ailton José; Campos, Lilian Oliveira; Maldi, Caroline Piza; Dias, Jeferson Almeida; Paris, E. C.; Giraldi, Tania R.; Freschi, Gian Paulo Giovanni

doi:10.1007/s11356-020-08798-x

Cited by 27 publications

(15 citation statements)

References 50 publications

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“…According to the literature, the conversion from Prozac® to MAEB + TFMP preferably follows a radical oxidation mechanism, while the conversion from Prozac® to PPMA + TFMP complies with the photolytic or hydrogenation mechanism (Moreira et al 2020a). Figure 9a shows the maximum conversion rate obtained during the Prozac® photolytic and photocatalytic degradations calculated according to the literature (Moreira et al 2020a).…”

Section: Prozac® Photocatalytic Degradationmentioning

confidence: 90%

Potential of Nb2O5 nanofibers in photocatalytic response for organic pollutants remediation

et al. 2021

Preprint

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Due to the pollution caused by different organic pollutants, various photocatalytic nanomaterials for environmental remediation have been promoted. In this study, Nb2O5 nanofibers were obtained by electrospinning technique, presenting controlled crystallinity and high specific surface area to improve the photoactivity response. The structural characterization indicated Nb2O5 nanofibres with orthorhombic phase formation, and the photoluminescence measurements showed different energy levels contributing to the electronic transition events. The nanofibers with a bandgap up to 3.6 eV were applied to photocatalysis of dyes [Rhodamine B (RhB) or Methylene Blue (MB)], and Prozac®, listed as an emergent pollutant. In the optimized condition (pH = 9), the RhB and MB photocatalysis was 59% and 93% more efficient than photolysis due to ζ = − 50 ± 5 mV for EtOH_550 sample that increased the interaction with MB (cationic) compared to RhB unprotonated (pKa = 3.7). Therefore, Prozac® (pKa = 10.7) was selected due to protonated form at pH = 9 and showed 68% ±1 adsorption in 30 min for EtOH_550. The Prozac® photocatalytic degradation under UV light irradiation was up to 17% higher than the photolytic degradation. The formation of hydroxyl radicals in the photocatalytic system (EtOH_550) was proven by the Coumarine probe assay, corroborating with the greater amount of α-[2-(Methylamino)ethyl]benzylalcohol (MAEB), a by-product obtained after Prozac® oxidation. Additionally, the material achieved specific catalytic activity for the different organic compounds (RhB, MB, or Prozac®), showing that only using dyes may not be ideal to conclude the great material applicability in environmental remediation studies. Therefore, Nb2O5 nanofibers were efficient for the degradation of three different pollutants under UV light, proving to be a viable alternative for environmental remediation.

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Section: Prozac® Photocatalytic Degradationmentioning

confidence: 90%

Potential of Nb2O5 nanofibers in photocatalytic response for organic pollutants remediation

et al. 2021

Preprint

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“…On the one hand, NPs can be obtained from the atomic level and then integrated into the desired materials. The methods of this kind of synthesis include self assembly ( Zhang et al, 2019b ; Deng et al, 2020 ), laser pyrolysis ( Laurent et al, 2010 ; Dumitrache et al, 2019 ), condensation ( Sano et al, 2020 ), CVD ( Gutés et al, 2012 ; Tyurikova et al, 2020 ), sol-gel method ( Gonçalves, 2018 ), soft lithography ( Fu et al, 2018 ), hydrothermal methods ( Zhen et al, 2019 ; Moreira et al, 2020 ), microwave methods ( Henam et al, 2019 ), sonochemical ( Gupta and Srivastava, 2019 ; Moreira et al, 2020 ), synthesis using plant extracts ( Ogunyemi et al, 2019 ; Ranoszek-Soliwoda et al, 2019 ), and green synthesis ( Gour and Jain, 2019 ; Irshad et al, 2020 ). On the other hand, macroscopic level materials can be trimmed down to NPs by different methods, including mechanical grinding ( Sviridov et al, 2017 ; Haque et al, 2018 ), ball milling ( Li Y. et al, 2020 ), lithography ( Fu et al, 2018 ), vapor deposition ( Choi et al, 2018 ), arc-plasma deposition ( Ito et al, 2012 ; Takahashi et al, 2015 ), ion beam technique ( Heo and Gwag, 2014 ; Yang J. et al, 2018 ), severe plastic deformation ( Cui et al, 2018 ; Sarkari Khorrami et al, 2019 ), chemical etching ( Wareing et al, 2017 ; Pinna et al, 2020 ), sputtering ( Pišlová et al, 2020 ), and laser ablation ( Pandey et al, 2014 ; Abid et al, 2020 ).…”

Section: Classification Of Nanomaterialsmentioning

confidence: 99%

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

Liu

Attarilar

et al. 2020

Front. Bioeng. Biotechnol.

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“…The nanoparticles show peaks at 25.34° (111), 37.94° (004), 47 It is worth remembering that the Scherrer equation is an approximation and not an accurate method for estimating the size of crystalline nanoparticles (Kibasomba et al 2018). However, this estimation suggests a nanometric nature of the materials, indicating an important characteristic of semiconductors applied in heterogeneous photocatalysis (Moreira et al 2020a). As the main purpose of the paper is to monitor the ATZ photolysis and photocatalysis using the chemometric approach for investigating degradation mechanism, the use of transmission electron microscopy to measure the nanoparticle size was dismissed.…”

Section: Nanomaterials Characterizationmentioning

confidence: 99%

“…2018; Moreira et al 2020a). Pure TiO 2 , which is one of the most investigated photocatalysts in the anatase crystalline phase, is well known due to its photoactivity in the UV region (Moreira et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

UV-Vis Spectrophotometry Coupled to Chemometric Analysis for the Evaluation of Atrazine Photolysis and Photocatalysis

Moreira

Lemos

Coelho

et al. 2021

Preprint

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In this study, a spectrophotometric-chemometric (Spec-Chem) approach was applied as an alternative to chromatography to monitor ATZ and by-products after photolytic and photocatalytic oxidation aiming to unveil the ATZ degradation mechanism. Spec-Chem is an accessible, easy-to-operate, low-cost analytical approach to monitor atrazine (ATZ) and by-products and its applicability was validated by HPLC, the reference technique for the evaluation of pollutants degradation mechanisms. The chromatographic (DChro) and spectrophotometric (DSpec) data found 95% and 57% ATZ removal after 30 min, respectively, proving that the DSpec erroneously induces a 38% loss in removal efficiency. When DSpec was treated by Multivariate Curve Resolution (MCR) analysis for providing chemometric data (DChem), it found ATZ removal and hydroxyatrazine (HAT) formation statistically equal to DChro (t-test, p = 0.05). After unraveling the ATZ degradation mechanism using Spec-Chem, a new hypothesis for the kinetic calculation of ATZ degradation was presented, where the concentrations of ATZ and HAT were used to find k and R2 values representative for the ATZ degradation mechanism. The values found for k were compatible with the literature under similar conditions of ATZ degradation and the linear correlation coefficients (R2 = 0.99) showed an optimal fit for the proposed hypothesis. Thus, Spec-Chem was successfully applied to unravel the mechanism of photocatalytic degradation of ATZ in the presence of TiO2, while k was obtained by the new hypothesis proposed that considered ATZ and HAT concentration as parameters of kinect interest. Therefore, the importance of monitoring quantitatively ATZ and HAT were provided in this study, providing new information for the scientific community.

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Photocatalytic degradation of Prozac® mediated by TiO2 nanoparticles obtained via three synthesis methods: sonochemical, microwave hydrothermal, and polymeric precursor

Cited by 27 publications

References 50 publications

Potential of Nb2O5 nanofibers in photocatalytic response for organic pollutants remediation

Potential of Nb2O5 nanofibers in photocatalytic response for organic pollutants remediation

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

UV-Vis Spectrophotometry Coupled to Chemometric Analysis for the Evaluation of Atrazine Photolysis and Photocatalysis

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