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- Title
A Highly Ultrafine Core–Shell Ir–Cu Bimetallic Nanoparticles and Their Application in Catalytic Oxidation of Textile Dye, Congo Red, by Hexacyanoferrate(III) Ions: A Kinetic Approach.
- Authors
Goel, Pooja; Goel, Anjali
- Abstract
Bimetallic nanoparticles (BMNPs), a pioneer class of material research for catalysis, were intensively explored. We report a versatile catalyst, core–shell (CS)@Ir–Cu bimetallic nanoparticles for organic oxidation reactions. (CS)@Ir–Cu BMNPs of Ir–Cu with a 1 : 1 ratio were synthesized by modified polyol reduction method from the solution of iridium trichloride and copper chloride in ethylene glycol (EG) as reducing agent and stabilized using polyvinylpyrrolidone surfactant (PVP). The synthesized (CS)@BMNPs were characterized using various analytical techniques. UV–Vis spectra and XRD analysis confirmed the formation of metallic precursor salts in nanoparticles. XRD also confirmed a FCC structure of the nanoparticles and their amorphous nature. Particle size distribution was determined by TEM and XRD; surface morphology was studied by FE-SEM techniques. Elemental composition of resultant particles was analyzed by EDX technique. Data from TEM and EDX confirmed that the resultant particles have a core–shell (CS) structure with Ir(0) shell on Cu(0) core (Ir–Cu BMNPs). As synthesized (CS)@Ir–Cu BMNPs were explored as catalyst for the oxidation of Congo red dye by HCF(III) ion in an aqueous alkaline medium. In terms of catalytic performance, the (CS)@Ir–Cu BMNPs are better catalyst as compared with Ir as well as Cu nanoparticles.
- Subjects
BIMETALLIC catalysts; CONGO red (Staining dye); CATALYTIC oxidation; POLYOLS; STABILIZING agents; PARTICLE size distribution; COPPER chlorides; ETHYLENE glycol
- Publication
Kinetics & Catalysis, 2021, Vol 62, Issue 5, p592
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158421050050