Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites

Abstract

Bifunctional nanocomposites based on zinc phthalocyanines and glutathione capped CoFe 2 O 4 magnetic nanoparticles (GSH-CoFe 2 O 4 MNPs) are applied in a binary system wherein simultaneous photooxidation of methyl orange (MO) and photoreduction of Cr (VI) are conducted. The photoactivity of two zinc Pcs with different functional moieties are compared based on their interactions with GSH-CoFe 2 O 4 MNPs. Conjugation of the Pcs to the GSH-CoFe 2 O 4 MNPs not only enhanced their singlet oxygen production but also their photocatalytic activity in both photooxidation and photoreduction experiments. Using electron paramagnetic resonance (EPR) spectroscopy, the Pc-MNP conjugates reported herein were found to exhibit superparamagnetic behaviour, giving the advantage of easy separation using an external magnetic field post application, an attractive attribute for heterogeneous catalysis. The catalysts reported herein are therefore good candidates as catalysts for real life water purification analyses as they facilitate the treatment of both organic and inorganic water pollutants.

Resveratrol-Encapsulated Glutathione-Modified Robust Mesoporous Silica Nanoparticles as an Antibacterial and Antibiofilm Coating Agent for Medical Devices

“…The amorphous nature of GSH@SNP was further confirmed by powder XRD studies (Figure i), where a broad peak at a 2θ value of ∼22° was observed for GSH@SNP. The peaks at 2θ values of ∼35, 43, 52, and 57° correspond to 311, 400, 422, and 511 planes for GSH@SNP, respectively. , Similar results were also obtained for Cyst@SNP and Cys@SNP (Figure S3). In literature, SNPs are known to be either mesoporous or microporous .…”

“…The peaks at 2θ values of ∼35, 43, 52, and 57°correspond to 311, 400, 422, and 511 planes for GSH@SNP, respectively. 31,32 Similar results were also obtained for Cyst@SNP and Cys@SNP (Figure S3). In literature, SNPs are known to be either mesoporous or microporous.…”

Synthesis and Characterization of Supermagnetic Nanocomposites Coated with Pluronic F127 as a Contrast Agent for Biomedical Applications

“…After coating, the nanocomposites presented lower aggregation, slightly larger particle size, and a smoother surface, which may be due to the presence of F127 on the surface of the MNPs. In addition, the obtained nanocomposites were found to be increased in the range of 50–100 nm, due to the aggregation produced by their magnetic properties [ 64 , 65 ].…”

Evaluation of photocatalytic performance and cytotoxic activity of green synthesized nickel ferrite nanoparticles

“…Since environmental pollution is a vital detrimental factor for human health, finding a suitable solution is imperative. Dyes are prominent pollutants that pose serious dangers to humans, other animals, and living organisms as they are not degraded by aerobic treatment processes and therefore their removal from industrial wastewater before discharge requires considerable care 7 . These pigments mainly contain one or more benzene rings, which are very toxic and their late decomposition can be carcinogenic, and if left untreated, they can enter the environment and cause irreparable damage to the environment 8–15 .…”