Bioinspired Pd-Cu Alloy Nanoparticles as Accept Agent for Dye Degradation Performances

Abstract

Dye degradation is a key reaction in organic decomposition production through electron donor transferring. Palladium (Pd) is the best-known element for synthesis Pd-based catalyst, the surface status determines the scope of relative applications. Here we first prepare Pd-Cu alloy nanoparticles (NPs) by co-reduction of Cu(acac)2 (acac = acetylacetonate) and Pd(C5HF6O2)2 in the presence of sodium borohydride (NaBH4) and glutathione (GSH). The obtained Pd-Cu is about ~10 nm with super-hydrophilicity in aqueous mediums. The structural analysis clearly demonstrated the uniform distribution of Pd and Cu element. The colloidal solution keeps stability even during 30 days. Bimetallic Pd-Cu NPs shows biocompatibility in form of cell lines (IMEF, HACAT, and 239 T) exposed to colloidal solution (50 µg mL−1) for 2 days. It shows the catalytic multi-performance for dye degradation such as methyl orange (MO), rhodamine B (RhB), and methylene blue (MB), respectively. The as-synthesized nanoparticles showed one of the best multiple catalytic activities in the industrially important (electro)-catalytic reduction of 4-nitrophenol (4-NP) to corresponding amines with noticeable reduced reaction time and increased rate constant without the use of any large area support. In addition, it exhibits peroxidase-like activity in the 3, 3′, 5, 5′-Tetramethylbenzidine (TMB) color test and exhibit obvious difference with previous individual metal materials. By treated with high intensity focused ultrasound filed (HIFU), Pd-Cu NPs might be recrystallized and decreased the diameters than before. The enhancement in catalytic performance is observed obviously. This work expedites rational design and synthesis of the high-hierarchy alloy catalyst for biological and environment-friendly agents.

Flexible design in controllable synthesis of Ru catalyst toward enzymatic and electrochemical hydrogen peroxide performance

“…In this high intensity ultrasound field, the energy of the system continues to increase, the ruthenium atom loses electrons, and the amorphous material realizes crystallization because its valence state is easily changed into an ionic state. 68 At the same time, it is reported that due to the presence of hydroxyl radicals, sonochemical reduction is carried out according to following equations: 65,69,70 H 2 O(HIFU) → H + + OH − 2H + → H 2 and OH − + OH − → H 2 O 2 H 2 O 2 + 2H + + Ru 3+ → RuNP + 2H 2 OEqn (6)–(8) indicate the sonochemical formation of reducing radicals and reductants: H + and OH − are formed from sonolysis of water, and H 2 O 2 in eqn (7) is a secondary product of hydroxyl radical recombination. Finally, after these complex reactions, various reducing substances were successfully reduced and crystalline Ru NPs were obtained.…”

“…In this high intensity ultrasound field, the energy of the system continues to increase, the ruthenium atom loses electrons, and the amorphous material realizes crystallization because its valence state is easily changed into an ionic state. 68 At the same time, it is reported that due to the presence of hydroxyl radicals, sonochemical reduction is carried out according to following equations: 65,69,70…”

High-Performance Hydrogen-Selective Pd-Ag Membranes Modified with Pd-Pt Nanoparticles for Use in Steam Reforming Membrane Reactors

“…The application of a modifier based on such nanoparticles to the surface of a palladium-containing membrane can significantly increase the catalytic activity of the material and the hydrogen permeability in low-temperature operation mode [54]. That is, the key factors contributing to the high activity of the material in reactions are the adjustment of the morphology and structure of particles (presence of high index facets, defects, and undercoordinated atoms) and the addition of a secondary metal [55][56][57][58][59]. In the first case, the given morphology is able to increase significantly the working surface of the membrane with an increased number of chemisorption centers [60].…”