Pulsed laser deposition of nanostructured tungsten oxide films: A catalyst for water remediation with concentrated sunlight

Fendrich, Murilo; Popat, Yaksh; Orlandi, Michele; Quaranta, A.; Miotello, A.

doi:10.1016/j.mssp.2020.105237

Cited by 15 publications

(3 citation statements)

References 59 publications

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“…However, the recovery of the material, after use, constitutes an additional problem [25]. From an industrial perspective, working with immobilized photocatalysts, such as thin films, allows the facile removal at the end of the process and displays enhanced compatibility with flow reactor installations [26,27]. On the other hand, the application of Z-schemes or other useful heterojunction-based design principles is quite straightforward and well established for nanopowders but much more difficult for thin-films.…”

Section: Introductionmentioning

confidence: 99%

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Fendrich,

Bajpai,

Edla

et al. 2023

Applied Sciences

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Thermally synthesized graphitic carbon nitride (g-C3N4) over pulsed laser deposition (PLD) produced urchin-like iron oxide (FeOx) thin films were fabricated via in situ and ex situ processes. Materials characterisation revealed the formation of the graphitic allotrope of C3N4 and a bandgap Eg for the combined FeOx/g-C3N4 of 1.87 and 1.95 eV for each of the different fabrication strategies. The in situ method permitted to develop a novel petal-like morphology, whereas for the ex situ method, a morphological mixture between FeOx bulk and g-C3N4 was observed. Given the improved optical and morphological properties of the in situ film, it was employed as a proof of concept for the direct photocatalysis and photo-Fenton removal of ciprofloxacin antibiotic (CIP) under visible light irradiation. Improved photocatalytic activity (rate constant k = 8.28 × 10−4 min−1) was observed, with further enhancement under photo-Fenton conditions (k = 2.6 × 10−3 min−1), in comparison with FeOx + H2O2 (k = 1.6 × 10−3 min−1) and H2O2 only (k = 1.3 × 10−4 min−1). These effects demonstrate the in situ methodology as a viable route to obtain working heterojunctions for solar photocatalysis in thin-film materials, rather than the more common powder materials.

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Section: Introductionmentioning

confidence: 99%

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Fendrich,

Bajpai,

Edla

et al. 2023

Applied Sciences

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“…The stance of MOSs, WO 3 is quite significant due to its high physical and chemical stability. The high potential of this material as an optical host led to its various applications including the roles of photocatalyst [31], photochromic [32], electrocatalyst [33,34], electrochromic [35], anti-cancer [36][37][38], and gas sensing [39]. The WO 3 is a non-toxic, n-type semiconductor that contains bandgap energy of approximately 2.6-3.0 eV and the option of being evoked by visible light [40] while offering desirable sensing properties, especially high sensitivity towards nitrogen oxides.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of tungsten oxide (WO ₃ ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Ghazal

Mirzaee

Darroudi

2022

Micro & Nano Letters

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In the present work, the synthesis of tungsten oxide nanosheets (WO 3 -NS) was performed through a sol-gel method with the usage of Na 2 WO 4 as the tungsten source in a gelatin solution that functioned as a novel green stabilising agent. The synthesised WO 3 -NS were characterised by the analysing methods of XRD, FESEM/EDX, FTIR, TGA/DTG, UVvis, Raman, and VSM. The photocatalytic activity of the product is investigated through the exertion of methylene blue pigment, while the obtained results reported 95% of degradation in 187 min under the light of a mercury vapour lamp. The cytotoxicity effect of WO 3 -NS on the human liver (Huh-7) cell line was evaluated by the means of the MTT method, which displayed the inhibiting capabilities of these nanosheets regarding cancer cells.

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“…In the last decades, tungsten oxides have been paid great attention as a consequence of their possible applications in electro-chromic devices [2], gas sensors [3], field emission display [4], catalyst [5], [6] and electronic devices of nanostructures [7]. Many methods have been developed to synthesize 1-D nanostructures, such as chemical vapor deposition [8], pulsed-laser deposition [9], [10], template assisted growth [11], thermal annealing [12] and solvothermal synthesis [13], [14]. The solvothermal synthesis is the most simple and effective method due to low temperature growth of nanostructures and low cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of reaction parameters on WOx nanostructures by the solvothermal process

et al. 2021

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In this work, nanowires and nanorods of WOx have been synthesized by the solvothermal method. The effect of reaction time and acetic acid as solvent were studied. X-ray diffraction (XRD) patterns showed the monoclinic WO2.72, WO2.79, and orthorhombic WO3 crystalline structures. Scanning Electron Microscopy (SEM) and High-Resolution Transmission Electronic Microscopy (HRTEM) images presented nanostructures such as nanowires and nanorods at different sizes. Band gap energies were supplied by Ultra Violet visible (UV-vis) absorption spectra. The Photoluminescence (PL) spectra exhibited three emission peaks in the blue zone at 440, 460, and 484 nm. X-ray Photoelectron Spectroscopy (XPS) was used to calculate W6+, W5+, and W4+ oxidation states. The results showed that increasing the reaction time from 10 h to 24 h affected the crystalline structure from monoclinic to orthorhombic. Moreover, with the addition of acetic acid as solvent, the crystal structure is not affected but stabilizes the monoclinic phase in the course of time.

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Pulsed laser deposition of nanostructured tungsten oxide films: A catalyst for water remediation with concentrated sunlight

Cited by 15 publications

References 59 publications

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Green synthesis of tungsten oxide (WO ₃ ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Effect of reaction parameters on WOx nanostructures by the solvothermal process

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Pulsed laser deposition of nanostructured tungsten oxide films: A catalyst for water remediation with concentrated sunlight

Cited by 15 publications

References 59 publications

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Green synthesis of tungsten oxide (WO 3 ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Effect of reaction parameters on WOx nanostructures by the solvothermal process

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Product

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Green synthesis of tungsten oxide (WO ₃ ) nanosheets and investigation of their photocatalytic and cytotoxicity effects