Iranian Journal of Chemistry & Chemical Engineering-international English Edition, May 27, 2020
The oxidation of 216 mg L-1 o-methylphenol was studied in acidic aqueous solution using boron-dop... more The oxidation of 216 mg L-1 o-methylphenol was studied in acidic aqueous solution using boron-doped diamond (BDD) and platinum (Pt) anodes. o-methylphenol was oxidized by hydroxyl radicals generated on the anode used, however, there was a significant distinction betwixt the BDD and Pt anodes in the effectiveness and accomplishment of electrochemical degradation. o-methylphenol was rapidly mineralized at the BDD anode, but its degradation was much slower at the Pt anode with a Total Organic Carbon (TOC) removal of 98% and 65% for BDD and Pt anodes, respectively. Using BDD anode, 3-methylcatechol, methylhydroquinone and maleic, fumaric, pyruvic, formic, glyoxylic, succinic, oxalic and acetic acids were detected. But, there was a formation of dark-colored polymeric compounds and precipitates in the solutions electrolyzed by the Pt anode, which was not observed for the BDD cells.
Solvent-free solid/liquid-phase-transfer catalysis. In this paper, we are describing the influenc... more Solvent-free solid/liquid-phase-transfer catalysis. In this paper, we are describing the influence of the phase-transfer catalyst in heterogeneous medium on the yield of some anionic, bimolecular reactions such as the Michael and Baylis–Hillman reactions.
An easy and environmentally friendly method has been developed for locust bean gum extraction fro... more An easy and environmentally friendly method has been developed for locust bean gum extraction from carob seeds to be used as natural support of palladium. The reaction was carried out in water under ultrasonic irradiation for a short period of time (30 min). This catalyst was characterized by different analytical techniques such as ultraviolet–visible (UV‐vis), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy/energy dispersive X‐ray spectroscopy (SEM/EDX), elemental mapping analysis, and X‐ray diffraction (XRD). The catalytic activity of Pd supported by locust bean gum was studied in Heck and Sonogashira cross‐coupling reactions in different conditions under ultrasonic irradiation. Likewise, it was examined as green catalyst of 4‐nitroaniline reduction at room temperature in water. The reusability of the catalyst was verified for five consecutive cycles, where excellent yields were obtained.
Iranian Journal of Chemistry & Chemical Engineering-international English Edition, May 27, 2020
The oxidation of 216 mg L-1 o-methylphenol was studied in acidic aqueous solution using boron-dop... more The oxidation of 216 mg L-1 o-methylphenol was studied in acidic aqueous solution using boron-doped diamond (BDD) and platinum (Pt) anodes. o-methylphenol was oxidized by hydroxyl radicals generated on the anode used, however, there was a significant distinction betwixt the BDD and Pt anodes in the effectiveness and accomplishment of electrochemical degradation. o-methylphenol was rapidly mineralized at the BDD anode, but its degradation was much slower at the Pt anode with a Total Organic Carbon (TOC) removal of 98% and 65% for BDD and Pt anodes, respectively. Using BDD anode, 3-methylcatechol, methylhydroquinone and maleic, fumaric, pyruvic, formic, glyoxylic, succinic, oxalic and acetic acids were detected. But, there was a formation of dark-colored polymeric compounds and precipitates in the solutions electrolyzed by the Pt anode, which was not observed for the BDD cells.
Solvent-free solid/liquid-phase-transfer catalysis. In this paper, we are describing the influenc... more Solvent-free solid/liquid-phase-transfer catalysis. In this paper, we are describing the influence of the phase-transfer catalyst in heterogeneous medium on the yield of some anionic, bimolecular reactions such as the Michael and Baylis–Hillman reactions.
An easy and environmentally friendly method has been developed for locust bean gum extraction fro... more An easy and environmentally friendly method has been developed for locust bean gum extraction from carob seeds to be used as natural support of palladium. The reaction was carried out in water under ultrasonic irradiation for a short period of time (30 min). This catalyst was characterized by different analytical techniques such as ultraviolet–visible (UV‐vis), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy/energy dispersive X‐ray spectroscopy (SEM/EDX), elemental mapping analysis, and X‐ray diffraction (XRD). The catalytic activity of Pd supported by locust bean gum was studied in Heck and Sonogashira cross‐coupling reactions in different conditions under ultrasonic irradiation. Likewise, it was examined as green catalyst of 4‐nitroaniline reduction at room temperature in water. The reusability of the catalyst was verified for five consecutive cycles, where excellent yields were obtained.
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