Fluorine doped zinc oxide nanowires: Enhanced photocatalysts degrade malachite green dye under visible light conditions

Kadi, Mohammad W.; McKinney, David; Mohamed, Reda M.; Mkhalid, I.A.; Sigmund, Wolfgang M.

doi:10.1016/j.ceramint.2015.11.052

Cited by 83 publications

(14 citation statements)

References 27 publications

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“…Such polycrystalline F-doped ZnO materials have been previously studied with applications in, e.g., photocatalysis. 24 The influence of fluorine treatment on the catalytic properties of the Cu/ZnO system has been subject of a recent study, 25 however, the role of fluorine remains elusive.…”

Section: Introductionmentioning

confidence: 99%

F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

Wolf

Millet

Seitz

et al. 2020

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

Wolf

Millet

Seitz

et al. 2020

Phys. Chem. Chem. Phys.

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“…In addition, the presence of the dopant element in the ZnO system can affect its electrical properties. Previously, influence of nitrogen, copper, aluminium, and fluorine dopant on ZnO was extensively studied [8][9][10][11]. Among them, the fluorine element is the most effective dopant for the ZnO matrix as it could avoid the lattice distortion and produce an efficient charge carrier without an electron trap [12].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Hydrothermal Growth Process for Low Resistance 1D Fluorine-Doped Zinc Oxide Nanostructures

Napi

Sultan

Ismail

et al. 2019

Journal of Nanomaterials

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Design of Experiment (DOE) has been used for the optimization of a hydrothermal growth process of one-dimensional fluorine-doped zinc oxide (1D-FZO). Box-Behnken design was used in the DOE which includes three design points on each of the synthesis condition parameters. The condition parameters were the gold sputtering time (10 s, 15 s, and 20 s), hydrothermal reaction time (3 hours, 6.5 hours, and 10 hours), and hydrothermal temperature (50°C, 75°C, and 100°C). This statistical method of DOE was used to study the effects of these hydrothermal conditions on the quality of 1D-FZO produced. Au nanoparticles were used as the catalyst to enable the growth of the 1D-FZO. The XRD and EDX analysis confirmed the formation of polycrystalline FZO with the presence of fluorine, zinc, and oxygen elements. SEM observations indicated that the sputtering time of the Au nanoparticles has significant effect on the morphology and growth process of 1D-FZO. The lowest resistance value of 22.57 Ω was achieved for 1D-FZO grown with the longest Au sputtering time at growth temperature below 100°C.

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“…[23][24][25][26] Kadi et al have previously doped ZnO NWs with fluorine in order to decrease the bandgap energy of the material and to further employ the resulting device as a heterogeneous catalyst for the photodegradation of malachite green dye using visible light. 27 Guo et al have sensitized ZnO NWs with graphene quantum dots to perform water splitting, 28 and Lee et al have coupled a ruthenium-based dye to ZnO in order to increase the absorption of light throughout the visible spectrum (in a strategy analogous to those employed in dye sensitized solar cells). 29 Although these sensitization methods vary in their degree of efficiency, some of the aforementioned sensitizers are costly while others make use of heavy metals which are significantly harder to recycle.…”

Section: Introductionmentioning

confidence: 99%

Carbon Dot Sensitized Photoanodes for Visible Light Driven Organic Transformations

Yarur¹,

Manioudakis²,

Naccache³

et al. 2019

Preprint

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Visible light photosensitization of metal oxides to create heterostructures for the conversion of solar-to-chemical energy is a promising approach to produce solar fuels and other valuable chemicals. Carbon dots have recently been considered as suitable candidates to sensitize wide bandgap metal oxide semiconductors due to their low cost and tunable optical properties. While photocatalytic systems using carbon dots as sensitizers have been reported, transformations involving the production of value-added chemicals as well as the electron transfer mechanisms underpinning photocatalysis within such heterostructures remain underexplored. Here we report the sensitization of zinc oxide nanowires with carbon dots for the α-heteroarylation of 1-phenylpyrrolidine with 2-chlorobenzothiazole under visible light illumination at room temperature. The carbon dots improve the light absorption of the nanowires in the visible region of the spectrum affording the use of white light to drive catalysis. From optical spectroscopy and electrochemistry investigations of the resulting nanohybrid material, the photocatalytic properties are explained by the band alignment at the zinc oxide-carbon dot junction where a series of single-electron transfers creates the necessary potential to oxidize 1-phenylpyrrolidine. The resulting cascade of electron transfers into and from the carbon dots drives the α-heteroarylation to a 97% yield after 24 hrs. <br>

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Fluorine doped zinc oxide nanowires: Enhanced photocatalysts degrade malachite green dye under visible light conditions

Cited by 83 publications

References 27 publications

F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

F-doping of nanostructured ZnO: a way to modify structural, electronic, and surface properties

Optimization of a Hydrothermal Growth Process for Low Resistance 1D Fluorine-Doped Zinc Oxide Nanostructures

Carbon Dot Sensitized Photoanodes for Visible Light Driven Organic Transformations

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