Homogeneous Palladium Nanoparticles Surface Hosts Catalyzed Reduction of the Chromophoric Azo (–N=N–) Group of Dye, Acid Orange 7 by Borohydride in Alkaline Media
作者： Ranendu Sekhar Das , Bula Singh , Arabinda Mandal , Rupendranath Banerjee , Subrata Mukhopadhyay
DOI: 10.1002/KIN.20883
关键词:
摘要: In alkaline media, well-characterized gelatin-stabilized palladium (GPd) nanoparticles catalyze the reduction of azo group containing pollutant dye, Acid Orange 7 (AO7) by sodium borohydride (NaBH4) to 1-amino-2-napthol and sulfanilic acid. Kinetic observations detailed FTIR studies suggests that reaction follows Langmuir–Hinshelwood kinetic model, where during both AO7 are adsorbed on GPd surface. Plots lnko versus ln[AO7] or ln[NaBH4] show order with respect NaBH4 remains almost same over different molar ratios [NaBH4]/[AO7]. The catalyzed shows an initial induction period (t0) due a surface-restructuring process nanoparticles, (1/t0) can be defined as rate surface restructuring. activation energy estimated 22 ± 3 25 kJ M−1, respectively.
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