Fabrication of MgAl2Si2O8 : M0.01 (M = Ni2+, Cu2+, Pd2+, Pt2+ and Ru3+): catalytic effects for the reduction of 2- or 4-nitroanilines in water

In this study, we synthesized and characterized Schiff base ligands (S1–3), which contained sulfonamide/sulfonate groups, and their corresponding Pd(II) complexes (K1–3). We also introduced these complexes into Al2O3‐supported materials (M1–3) using the impregnation method. Following the structural characterization, we proceeded to evaluate the performance of the supported materials in a series of degradation and reduction reactions of involving organic pollutants. These assessments were conducted with the intention of exploring their potential as catalysts in aqueous environments in the presence of NaBH4. The study's findings present novel approaches to develop effective catalysts for reducing/degrading organic pollutants in aqueous environments. The M2 catalyst showed excellent results for dye mixing after 90 s. Additionally, we investigated the antibacterial and cytotoxic properties of the synthesized compounds. The outcome also suggests that these synthesized compounds exhibit potential antibacterial and cytotoxic properties.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic and biological properties of palladium(II) complexes with bidentate Schiff base ligands

Özgür,

Dervişoğlu,

Özdemir

et al. 2023

“…[ 14–16 ] In the literature, Pd complexes and Pd nanoparticles supported to solid materials have frequently been used as heterogeneous catalysts with excellent conversion rates in the reduction of organic dyes such as nitrophenols and eosin yellow, which are harmful to the environment. [ 17–22 ] In this perspective, Al 2 O 3 is a good supporting material because it is easily handled and increases the efficiency of catalysts synergistically. [ 23 ]…”

Section: Introductionmentioning

confidence: 99%

The preparation of new palladium (II) complexes with Schiff base type ligands and its impregnated Al₂O₃ materials: As the catalysts for degradation/reduction of organic dyes

Selvi

Tercan

Özdemir

et al. 2020

The removal of organic dyes used in many sectors such as textile, paper, leather, and packaging from water sources is very important in terms of preventing the spread of industrial pollutants to the environment. Transition metal complexes supported to an inorganic solid material are frequently used for the degradation/reduction of organic dyes causing this pollution. In this study, new Pd (II) complexes with Schiff base ligands were synthesized and structurally characterized by nuclear magnetic resonance (NMR), Fourier‐transform infrared spectroscopy (FT‐IR), mass spectrometry (MS), and single‐crystal X‐ray diffraction (sc‐XRD) spectroscopic methods. Then, the Al2O3‐impregnated materials of these Pd (II) complexes were prepared and characterized by scanning electron microscopy with energy dispersive X‐ray analysis (SEM‐EDX), FT‐IR, and thermogravimetry (TG) techniques. The catalytic activities of the synthesized Pd (II) complexes and their Al2O3‐impregnated materials were comparatively analyzed to investigate the degradation/reduction of organic dyes (2‐nitroaniline, 4‐nitroaniline, 4‐nitrophenol, eosin yellow, and methylene blue). The catalytic results indicate that Al2O3‐impregnated materials are very active catalysts for the degradation/reduction of organic dyes under those circumstances. Conversions of up to 98% for all substrates were obtained after 5 min at ambient temperature.

Hybrid nanoflowers bearing tetraphenylporphyrin assembled on copper(II) or cobalt(II) inorganic material: A green efficient catalyst for hydrogenation of nitrobenzenes in water

Dayan

Altınkaynak

Kayacı

et al. 2020

Self Cite

Simple fabrication of organic–inorganic hybrid nanoflowers (TPP@CuhNfs and TPP@CohNfs) was achieved with tetraphenylporphyrin (TPP) as organic counterpart and Cu2+ or Co2+ ions as inorganic materials via a green route, with lower cost and controlled pH. The effect of pH levels and TPP concentrations on the morphology of the TPP@CuhNfs and TPP@CohNfs materials was examined by scanning electron microscopy (energy‐dispersive X‐ray [EDX]). The formation and chemical structures of TPP@CuhNfs and TPP@CohNfs were evaluated using Fourier transform infrared. Elemental analyses of these hybrid nanoflowers were carried out by EDX. The fabricated TPP@CuhNfs and TPP@CohNfs nanomaterials under optimum conditions act as effective reusable catalysts for the hydrogenation of nitroanilines in aqueous media at ambient temperature. The time‐dependent hydrogenation can be easily monitored spectrophotometrically and verified by 1H‐nuclear magnetic resonance. These types of the catalytic reaction or system are recorded to be useful toward the hydrogenation of nitroanilines, regardless of the position and type of substrate. Moreover, TPP@CuhNfs and TPP@CohNfs catalysts demonstrated a type of metal ions‐dependent catalytic efficiency toward hydrogenation of nitroanilines (organic pollutants), with TPP@CuhNfs found to be more effective than TPP@CohNfs. However, both catalysts containing Cu2+ and Co2+ ions showed good performance and can be reused at least five times without a significant decline in yield. The presented approach based on hybrid nanoflowers provides as a low cost and ecofriendly method (green route) for different catalytic hydrogenations.