Efficient preparation of polymer‐based hollow spheres for the photocatalytic degradation of methylene blue

Abstract

Titanium dioxide hollow spheres were synthesized by utilizing polystyrene-co-methacrylic acid latex particles coated with titanium isopropoxide. Hollow spheres prepared with different ruthenium salt concentrations showed considerable levels of organic pollutant degradation upon UV irradiation. In the present study, methylene blue (MB) was selected as a model for these pollutants. Thus its degradation indicated the activity of the hollow spheres as photocatalysts for decomposing the pollutants. The efficiencies of these photocatalysts were determined in terms of chemical oxygen demand removal. During these experiments, several conditions were monitored such as the effects of pH, ruthenium salt concentration, and initial MB load concentration. The prepared particles were characterized by using transmission electron microscopy and scanning electron microscopy.

Facile Synthesis of chitosan-g-PVP/f-MWCNTs for application in Cu(II) ions removal and for bacterial growth inhibition in aqueous solutions

“…Recently, several studies reported the utility of grafted Cs as unconventional adsorbent for removal metallic contaminants that showed high metal adsorption affinities 15 – 17 . In continuation to our previous work for developing of new materials for wastewater treatment 18 – 20 , herein in this study we aimed to investigate the modification of chitosan by its reaction with 4-vinylpyridine (4-VP) to produce Cs-g-PVP copolymer and then in another series of experiments, functionalized multiwall carbon nanotubes (f-MWCNTs) were added to the prepared copolymer to obtain Cs-g-PVP/f-MWCNTs with the aim of improving the physisorption properties. To the best of our knowledge, few protocols reported the use homopolymer of PVP 21 or copolymers containing 4-vinylpyridine in the removal of metal ions removal 22 – 25 .…”

Hybrid Membranes Based on Clay-Polymer for Removing Methylene Blue from Water

“…Hence, the treatment of effluents loaded with MB is interesting to avoid the harmful impacts on the carrying waters. 10,11 Recently, there is an increasing interest to investigate porous ceramic composite materials. Many products are made of porous ceramic, such as membranes, catalytic substrates and filters.…”