Graphene oxide-induced CuO reduction in TiO2/CaTiO3/Cu2O/Cu composites for photocatalytic degradation of drugs via peroxymonosulfate activation

Applied Surface Science, Journal Year: 2024, Volume and Issue: 656, P. 159698 - 159698

Published: Feb. 13, 2024

Contamination of water bodies is a global environmental and human health issue. Conventional treatment systems cannot efficiently eliminate organic contaminants, particularly drugs. Photocatalysis promising, environmentally friendly oxidation process for the removal such compounds. A key point choice material to be used as photocatalyst. Here, TiO2/CaTiO3/Cu2O/Cu composites were fabricated by adding different amounts (x) graphene oxide (GO) (x wt% = 1, 3, 5%) CaCu3Ti4O12 powder using solid-state synthesis method. The produced pellets sintered under inert nitrogen atmosphere at 1100°C 3h. X-ray diffraction analysis showed that Cu metal amount was increased upon GO addition, UV–Vis diffuse reflectance spectroscopy spectral response extended visible range. Then, high performance liquid chromatography assessment paracetamol degradation photocatalytic cell with efficiency introduction 0.5 mM peroxymonosulfate (PMS) active component generate ●SO4‾ radicals. After 3 hours light, 96% 10 ppm degraded composite 3% (1 cm2 surface photocatalyst) compared 50% without in same experimental conditions (PMS 210 mL aqueous solution). Free radical trapping acute toxicity potential by-products also investigated. Our results indicate displays long-term stability durability pharmaceutical pollutants from wastewater.

Language: Английский

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Insights into the photocatalysis mechanism of the novel 2D/3D Z-Scheme g-C3N4/SnS2 heterojunction photocatalysts with excellent photocatalytic performances

Journal of Hazardous Materials, Journal Year: 2020, Volume and Issue: 402, P. 123711 - 123711

Published: Aug. 20, 2020

Language: Английский

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Reactive Oxygenated Species Generated on Iodide‐Doped BiVO₄/BaTiO₃ Heterostructures with Ag/Cu Nanoparticles by Coupled Piezophototronic Effect and Plasmonic Excitation

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(13)

Published: Jan. 20, 2021

Abstract An effective generation of reactive oxygen species (ROS) is interest from the perspective environmental technology and industrial chemistry, here piezocatalysis photocatalysis using heterostructures based on iodide‐doped BiVO 4 /BaTiO 3 with photodeposited Ag or Cu nanoparticles (BiVO :I/BTO‐Ag :I/BTO‐Cu) studied. The rates •OH •O 2 − radicals over during piezophotocatalysis are 371 292 µmol g −1 h , respectively, significantly higher than those sole photocatalysis. These among highest reported for production free piezophototronic effect. Among catalysts, :I/BTO shows reactivity H O in (with a concentration 468 µ m after 100 min irradiation, still constantly increasing). On :I/BTO‐Cu, it seems that redundant electrons holes had reacted effectively generated turn reduced their activities; however, amounts formed :I/BTO‐Cu under superior to individual A coupling via an ultrasound‐mediated piezoelectric‐based polarization field photoexcitation accounting enhanced photocatalytic activity iodine‐doped plasmonically sized suggested.

Language: Английский

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Dielectric Properties of ZnO-Based Nanocomposites and Their Potential Applications

International Journal of Optics, Journal Year: 2021, Volume and Issue: 2021, P. 1 - 20

Published: July 22, 2021

Energy storage devices constitute one of the research areas in recent years. Capacitors are commonly used for electrical energy. The current is focusing on not only improvement energy density but also materials which environment friendly. Polymer composites known to be technically essential owing their wide range applications. Enormous has been devoted zinc oxide- (ZnO-) based polymer nanocomposites, due extraordinary dielectric properties. This review article presents a detailed study properties ZnO-based nanocomposites. constant includes effect transition metals and rare earth as dopant ZnO. gives an insight into mechanism responsible variation ZnO nanocomposites various factors like size nanoparticles, thickness thin film, operating frequency, doping concentration, atomic number. observations have summarized convey structural changes involved researchers. deployment biodegradable nanocomposite expected open innovative way outstanding electronic applications materials.

Language: Английский

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Bimetal (Fe/Zn) doped BiOI photocatalyst: An effective photodegradation of tetracycline and bacteria

Chemosphere, Journal Year: 2021, Volume and Issue: 280, P. 130803 - 130803

Published: May 5, 2021

Language: Английский

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Visible-Light Photocatalysts and Their Perspectives for Building Photocatalytic Membrane Reactors for Various Liquid Phase Chemical Conversions

Catalysts, Journal Year: 2020, Volume and Issue: 10(11), P. 1334 - 1334

Published: Nov. 17, 2020

Photocatalytic organic synthesis/conversions and water treatment under visible light are a challenging task to use renewable energy in chemical transformations. In this review brief overview on the mainly employed photocatalysts discussion problems advantages of Vis-light versus UV-light irradiation is reported. Visible photocatalytic conversion CO2, acetophenone phenylethanol, hydrogenation nitro compounds, oxidation cyclohexane, synthesis vanillin phenol, as well hydrogen production discussed. Some applications these membrane reactors (PMRs) for carrying out synthesis, and/or degradation pollutants The described cases show that PMRs represent promising green technology could shift industrial interest using (from Sun) active photocatalysts.

Language: Английский

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Structural and compositional tuning in g-C3N4 based systems for photocatalytic antibiotic degradation

Chemical Engineering Journal Advances, Journal Year: 2021, Volume and Issue: 8, P. 100148 - 100148

Published: July 11, 2021

The uncontrolled and unethical release of pharmaceutical contaminants into aquatic sources have severe adversities, including the possible emergence antimicrobial-resistant bacteria. Photocatalysis utilizing semiconductor heterostructures is a greener sustainable option for effective degradation organic relatively harmless by-products. Visible/sunlight active graphitic carbon nitride based photocatalysts been explored antibiotic (Tetracycline, Doxycycline, Oxytetracycline, Sulfamethoxazole, Amoxicillin) owing to their excellent chemical/thermal stability, tunable photophysical properties facile methods synthesis. were further enhanced by heterostructure formation with other compatible semiconductors, elemental/molecular doping through creation hierarchically porous structures. Moreover, nanocomposite high surface area frameworks induces adsorptive photocatalysis imparting bifunctionality alleviating secondary remediation measures regeneration catalysts. review summarizes efforts in developing C3N4 systems various antibiotics. Finally, an outlook on essential improvements forecasted.

Language: Английский

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Synthesis of novel eco-friendly CaO/C photocatalyst from coffee and eggshell wastes for dye degradation

Journal of Materials Research and Technology, Journal Year: 2021, Volume and Issue: 14, P. 3140 - 3149

Published: Aug. 25, 2021

For the first time, calcium oxide (CaO) and oxide/carbon (CaO/C) are prepared by thermal decomposition from eggshell coffee wastes as photocatalysts. The morphological, structural, chemical optical properties of nanopowders were investigated using a variety techniques. crystallite size for plane (111) increases 564.09 Å CaO to 1654.67 CaO/C, according XRD. CaO/C photocatalyst has high increase in light absorption visible spectrum. bandgaps 1.73 1.52 eV, respectively. After 35 min sunlight exposure, photocatalytic removal methylene blue (MB) dye employing shown significant improvement (99.76 %) compared (88.04 %). is attributed an surface area adsorption, which efficiency. zero-, first-, second-order kinetic parameters discussed at various dosages. current research can be used industry remove toxic MB wastewater recycle wastes.

Language: Английский

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A Copper(I) oxide-zinc oxide nano-catalyst hybrid: Brief characterization and study of the kinetic of its photodegradation and photomineralization activities toward methylene blue

Materials Science in Semiconductor Processing, Journal Year: 2020, Volume and Issue: 122, P. 105495 - 105495

Published: Oct. 10, 2020

Language: Английский

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Z-scheme Au decorated carbon nitride/cobalt tetroxide plasmonic heterojunction photocatalyst for catalytic reduction of hexavalent chromium and oxidation of Bisphenol A

Journal of Hazardous Materials, Journal Year: 2020, Volume and Issue: 410, P. 124539 - 124539

Published: Nov. 11, 2020

Language: Английский

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