Degradation of Methylene Blue with a Cu(II)–Quinoline Complex Immobilized on a Silica Support as a Photo-Fenton-Like Catalyst

Abstract

A Cu(II)–quinoline complex immobilized on a silica support was prepared to enhance the degradation of dyes. Mesoporous silica functionalized with this Cu(II) complex was turned into a photo-Fenton-like catalyst. Various techniques were used to characterize the resulting material, and the catalytic activity was determined by the degradation of methylene blue (MB) under UV light irradiation. The Cu(II) ion was successfully coordinated to the quinoline ligand on a silica support. The dye degradation investigation has shown that 95% of the dye was degraded in 2.5 h. The active radical species involved in the reaction were OH • and O 2 •– , suggesting that a peroxo complex intermediate might be formed during degradation processes.

Kanamycin−Cu(II) Complex Catalyzed Ullmann Amine Synthesis at Room Temperature: A Tool for Mechanistic Insights into Methylene Blue Degradation

“…The kinetics of the photocatalytic reaction of 1‐Cu for the degradation of MB were investigated through the plot of ln([A t ]/A o ) vs. time, where A o is the intensity of Methylene Blue at time zero, and At is the peak intensity at time t (Figure 4). It can be calculated from the plot that the degradation rate constant of the MB by 1‐Cu is 17.7×10 −3 min −1 , which is comparative with other reported photocatalysts [2i,j] …”

Self-cleaning cellulose acetate/crystalline nanocellulose/polyvinylidene fluoride/Mg0.975Ni0.025SiO3 membrane for removal of diclofenac sodium and methylene blue dye in water

“…All experiments were conducted under stirring at 300 rpm, in the dark, at room temperature. Pollutant concentration was considered proportional to the characteristic absorption peak of the pollutant at 278 nm [37] and 665 nm [38] for DCF and MB, respectively. The absorbance of the pollutant solution was measured by taking a sample at the start and after 120 min.…”

Highly efficient visible light active ZnO/Cu-DPA composite photocatalysts for the treatment of wastewater contaminated with organic dye

“…developed a Cu(II)–Quinoline complex immobilized on a Silica support for the degradation of MB dye. The reported Cu(II) complex acted as a Photo-Fenton-like catalyst showing the efficiency of 95% for the dye degradation in 2.5 h 21 . Same year Hemant et al reported copper(II) Schiff base metal complex as a powerful candidate for the photocatalytic degradation of MB dye in the presence of H 2 O 2 as an oxidising agent 22 .…”