An Efficient Investigation and Machine Learning-Based Prediction of Decolorization of Wastewater by Using Zeolite Catalyst in Electro-Fenton Reaction

Catalysts, Год журнала: 2023, Номер 13(7), С. 1085 - 1085

Опубликована: Июль 10, 2023

The shortage of water resources has caused extensive research to be conducted in this field develop effective, rapid, and affordable wastewater treatment methods. For the wastewater, modern oxidation techniques are desirable due their excellent performance simplicity implementation. In project, wet impregnation hydrothermal technique were applied synthesize a modified catalyst. Different analysis methods used determine its characteristics, including XRD, BET, FT-IR, NH3−TPD, FE-SEM. catalyst features spherical shape, large surface area, high crystallinity, uniform active phase dispersion. order eliminate methylene blue dye as modeling effluent, catalyst’s was examined heterogeneous quasi-electro-Fenton (EF) reaction. impact various such concentration reaction medium, solution pH, current intensity between two electrodes, elucidated. According results, best operational circumstances included pH level 2, 0.15 g/L, 150 mA, resulting greatest elimination efficiency 101%. stable during three consecutive tests. A pseudo-first-order model for reaction’s kinetics developed, which showed acceptable agreement with experimental results. This study’s findings help clarify how well zeolite functions pseudo-EF results revealed method’s potential implemented treatment. An artificial neural network is utilized predict removal percentage. hyperparameter tuning find model, achieved an MAE 1.26% R2 0.99.

Язык: Английский

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Low-Palladium-Content Iron(III) Nanocatalyst Supported on Zeolite-NaY for C–Cl Bond Activation

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(19), С. 17972 - 17985

Опубликована: Сен. 15, 2023

A heterogeneous nanocatalyst comprising palladium (Pd/PdO) and iron(III) oxide (Fe2O3) in the dimension of 1–4 nm was synthesized using sodium-exchanged zeolite-Y or zeolite-NaY [a type faujasite (FAU) zeolite having an aluminosilicate framework with a general formula (Na2)3.5[Al7Si17O48]·32H2O] as support matrix. The catalyst investigated true for activation robust C–Cl bond aryl chlorides Suzuki–Miyaura cross-coupling (SMCC) reaction. very low Pd loading (0.0037 mol %) exhibited high reactivity SMCC reaction various derivatives (Ar–Cl). Biaryl products were obtained up to 92% yield, selectivity, good turnover number this Pd/PdO–Fe2O3-Y catalyst. thermal stability highly recyclable. found be reliant on parameters such solvent system, temperature, time, amount. small aliquot water (H2O) mixed methanol (CH3OH) dramatically brought substantial improvement product yield desired biaryl product. role also by comparing results other catalysts. Different experimental studies indicated that surface hydroxyl (−OH) groups zeolite-NaY, modification basic sites, ability influence reduction temperature iron (Fe) (Pd) influenced catalytic performance impact Fe electronic structure analyzed through density functional theory calculation. This study provided strong evidence creation negative (−ve) charge increasing amount content thereby favored situ transformation Pd(II) Pd(0) required bond.

Язык: Английский

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Preparation of MnSe/CuO on MWCNTS for synergistic photocatalysis scavenging and antibacterial efficiencies

Materials Science and Technology, Год журнала: 2024, Номер 40(3), С. 262 - 272

Опубликована: Янв. 8, 2024

In this study, manganese selenide/copper oxide nanocomposites anchored on multi-walled carbon nanotubes (MnSe/CuO/MWCNTs) were fabricated with different ratios and their characteristic properties evaluated. Microscopic images show the decoration of CuO MnSe without changing morphology. UV–Vis analysis indicates that best optical MnSe/CuO/MWCNT nanomaterials via 2.06 eV as a band gap energy. The photocatalytic ability was evaluated by decomposition rhodamine B (RhB) (97.23%) malachite green (MG) (100.0%) under visible LED irradiation within 45 min. Furthermore, antibacterial activity prepared nanosamples investigated against Escherichia coli Staphylococcus aureus strains. results MnSe/CuO/MWCNTs can be used stronger agent.

Язык: Английский

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CO‐Induced Dimer Decay Responsible for Gem‐Dicarbonyl Formation on a Model Single‐Atom Catalyst

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(16)

Опубликована: Янв. 31, 2024

The ability to coordinate multiple reactants at the same active site is important for wide-spread applicability of single-atom catalysis. Model catalysts are ideal investigate link between geometry and reactant binding, because structure single-crystal surfaces can be precisely determined, adsorbates imaged by scanning tunneling microscopy (STM), direct comparisons made density functional theory. In this study, we follow evolution Rh

Язык: Английский

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Nanoparticles as an antidote for poisoned gold single-atom catalysts in sustainable propylene epoxidation

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 16, 2024

Abstract The development of sustainable and anti-poisoning single-atom catalysts (SACs) is essential for advancing their research from laboratory to industry. Here, we present a proof-of-concept study on the poisoning Au SACs, antidote nanoparticles (NPs), with trace addition shown reinforce sustain propylene epoxidation. Multiple characterizations, kinetics investigations, multiscale simulations reveal that SACs display remarkable epoxidation activity at low coverage, but become poisoned higher coverages. Interestingly, NPs can synergistically cooperate by providing distinct active sites required H 2 /O C 3 6 activations, as well hydroperoxyl radical restore SACs. difference in reaction order between (n C3H6 -n H2 ) identified descriptor establishing volcano curves, which be fine-tuned intimacy composition achieve rate-matching scenario formation, transfer, consumption hydroperoxyl. Consequently, only (0.3% ratio SACs) stimulates significant improvements oxide formation rate, selectivity, efficiency compared alone, offering 56-fold, 3-fold, 22-fold increase, respectively, whose performances maintained 150 h.

Язык: Английский

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