Solvent influence on the formation of ZnO nanoparticles by sonochemical technique and evaluation of UV-blocking efficiency

We report the synthesis of a non-toxic and antibacterial chitosan–ZnO composite with UV-blocking properties and efficiently quenched photocatalytic activity towards radical generation.

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Effect of ZnO nanoparticles morphology on UV blocking of poly(vinyl alcohol)/ZnO composite nanofibers

Materials Letters ◽

10.1016/j.matlet.2015.02.004 ◽

2015 ◽

Vol 147 ◽

pp. 20-24 ◽

Cited By ~ 23

Author(s):

Young Min Im ◽

Tae Hwan Oh ◽

Joseph A. Nathanael ◽

Seung Soon Jang

Keyword(s):

Zno Nanoparticles ◽

Vinyl Alcohol ◽

Composite Nanofibers ◽

Poly Vinyl Alcohol ◽

Uv Blocking

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Growth of Nano-ZnO Particles in Cotton Fiber Interiors by In Situ Reaction

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.671.285 ◽

2015 ◽

Vol 671 ◽

pp. 285-292

Author(s):

Wei Gou Dong ◽

Qi Cui ◽

Shu Dong Wang

Keyword(s):

Low Temperature ◽

Zno Nanoparticles ◽

Cotton Fiber ◽

Cell Walls ◽

Cotton Fabrics ◽

Cotton Fibers ◽

Protection Factor ◽

Uv Blocking ◽

Zno Particles

ZnO nanoparticles were synthesized directly onto the surfaces, lumina, and cell walls of the cotton fibers at low temperature. Studies showed that the nanoZnO particles grown in cell walls of cotton fibers were globose particles with diameters around 40 nm, but those existing on the surfaces of cotton fibers were hexagonal sheeted crystalline solids and had higher crystallinity. Furthermore, UV-blocking characterization and the fastness to washing of the treated cotton fabrics were estimated. The results showed the treated fabrics provided an excellent UV protection factor rating of 50+ , and exhibited a high fastness to washing because nanoZnO particles were assembled in fibrous interiors .

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Polycaprolactone based membranes for the degradation of diclofenac present in water samples using ZnO nanoparticles as the active agent

MRS Advances ◽

10.1557/adv.2020.417 ◽

2020 ◽

Vol 5 (61) ◽

pp. 3153-3161

Author(s):

Marco Antonio Juárez Sánchez ◽

Miguel Ángel Meléndez Lira ◽

Celestino Odín Rodríguez Nava

Keyword(s):

Zno Nanoparticles ◽

Wastewater Treatment Plants ◽

Active Agent ◽

Heterogeneous Photocatalysis ◽

Nano Particles ◽

Electrical Characteristics ◽

Unit Operation ◽

Fields Of Study ◽

Drug Contamination ◽

Positive Results

AbstractDrug contamination in water is one of the current fields of study. Since 1990, the presence of drugs in drinking water has been a concern to scientists and public. In Mexico, these organic compounds are not efficiently removed in wastewater treatment plants; therefore, alternative methodologies have been studied that allow these compounds to have a high percentage of degradation or be completely degraded. One example of these techniques is heterogeneous photocatalysis which has obtained positive results in the degradation of drugs using ZnO nanoparticles. These are commonly selected for their electrical characteristics, even though they disperse in water and an additional unit operation is required to separate them from the liquid medium. To eliminate drugs with nano particles in a single stage, polycaprolactone-based membranes with adhered ZnO nanoparticles, by means of electrospinning, were prepared to degrade drugs such as diclofenac. The technique used has shown to efficiently break down diclofenac in 4 hours according to the capillary electrophoresis readings.

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