scholarly journals Photocatalytic Degradation of Methylene Blue Using Polymeric Membranes Based on Cellulose Acetate Impregnated with ZnO Nanostructures

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3451
Author(s):  
Muna A. Abu-Dalo ◽  
Saja A. Al-Rosan ◽  
Borhan A. Albiss
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Cellulose Acetate ◽  
Zno Nanoparticles ◽  
Uv Light ◽  
Zno Nanowires ◽  
Polymeric Membranes ◽  
Zno Nanostructures ◽  
Photocatalytic Ability ◽  
Sunlight Irradiation

This paper studied the photocatalytic degradation of methylene blue (MB) using polymeric membrane impregnated with ZnO nanostructures under UV-light and sunlight irradiation. ZnO nanoparticles and ZnO nanowires were prepared using the hydrothermal technique. Cellulose acetate polymeric membranes were fabricated by the phase inversion method using dimethylformamide (DMF) as a solvent and ZnO nanostructures. The structural properties of the nanostructures and the membranes were investigated using XRD, SEM, FTIR, and TGA measurements. The membranes were tested for photocatalytic degradation of MB using a UV lamp and a sunlight simulator. The photocatalytic results under sunlight irradiation in the presence of cellulose acetate impregnated with ZnO nanoparticles (CA-ZnO-NP) showed a more rapid degradation of MB (about 75%) compared to the results obtained under UV-light irradiation degradation (about 30%). The results show that CA-ZnO-NP possesses the photocatalytic ability to degrade MB efficiently at different levels under UV-light and sunlight irradiation. Modified membranes with ZnO nanoparticles and ZnO nanowires were found to be chemically stable, recyclable, and reproducible. The addition of ZnO nanostructure to the cellulose membranes generally enhanced their photocatalytic activity toward MB, making these potential membranes candidates for removing organic pollutants from aqueous solutions.

Biogenic synthesis of ZnO–Ag nano custard apples for efficient photocatalytic degradation of methylene blue by sunlight irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 17179-17185 ◽  
Author(s):  
S. Kaviya ◽  
Edamana Prasad
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Biogenic Synthesis ◽  
Sunlight Irradiation ◽  
Custard Apple

A biosynthesized ZnO–Ag nano custard apple shows a better photocatalytic activity towards the degradation of methylene blue than commercial ZnO nanoparticles and TiO2 (P25).

Binary WO3-ZnO nanostructures supported rGO ternary nanocomposite for visible light driven photocatalytic degradation of methylene blue

2020 ◽  
Vol 269 ◽  
pp. 116526
Author(s):  
Khadija Chaudhary ◽  
Nusrat Shaheen ◽  
Sonia Zulfiqar ◽  
Muhammad Ilyas Sarwar ◽  
Muhammad Suleman ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Zno Nanostructures ◽  
Ternary Nanocomposite ◽  
Visible Light Driven

Solar Photocatalytic Degradation of Methylene Blue by ZnO Nanoparticles

2017 ◽  
Vol 17 (2) ◽  
pp. 1185-1192 ◽  
Author(s):  
Balaprasad G Ankamwar ◽  
Vaishali B Kamble ◽  
Jose I Annsi ◽  
Loka S Sarma ◽  
Chandrashekhar M Mahajan
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles

scholarly journals The Photodegradation of Organic Compounds by ZnO Nanopowder

2014 ◽  
Vol 895 ◽  
pp. 547-557 ◽  
Author(s):  
T.K. Tan ◽  
P.S. Khiew ◽  
W.S. Chiu ◽  
S. Radiman ◽  
R. Abd-Shukor ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Organic Compounds ◽  
Zno Nanoparticles ◽  
Uv Light ◽  
Aqueous Suspension ◽  
Phenol Red ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Zno Nanopowder

The commercialized ZnO nanopowder has been employed in this study to investigate the photocatalytic degradation of two organic compounds, Methylene Blue (MB) and Phenol Red (PR) in an aqueous suspension of ZnO nanoparticles under UV light irradiation. This study has considered ZnO as the photocatalyst because it has been reported as a suitable substitute for TiO2 in certain application. For the characterization of the ZnO photocatalyst, X-ray diffraction (XRD), transmission electron microscopy (TEM), specific surface area analysis (BET), and UV-visible spectroscopy were exploited. X-ray diffractometry result for the ZnO nanoparticles exhibit normal crystalline phase features. All observed peaks can be indexed to the pure hexagonal wurtzite crystal structures, with the space group of P63mc. From the XRD pattern, no diffraction peaks from other impurities have been observed. In addition, TEM measurement shows that most of the nanoparticles are spherical and rod-like in shape and fairly monodispersed. A significant degradation of the organic compounds were observed in the presence of the catalyst without the irradiation of the UV light and the degradation increases significantly when irradiated with the UV light for a certain period of time. Besides, for the same period of irradiation, the photodegradation of the organic compounds was increased as the photocatalyst loading increases. The BET measurement for ZnO was 11.9 m2/g. The effect of some parameters such as initial concentration of organic compounds and photocatalyst loading were also determined. Keywords: Nanostructures; Methylene blue; Phenol red; Zinc oxide; Heterogeneous photocatalyst

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