Merck
  • Inicio
  • Resultados de la búsqueda
  • Designing versatile heterogeneous catalysts based on Ag and Au nanoparticles decorated on chitosan functionalized graphene oxide.

Designing versatile heterogeneous catalysts based on Ag and Au nanoparticles decorated on chitosan functionalized graphene oxide.

Physical chemistry chemical physics : PCCP (2015-04-08)
Rajendiran Rajesh, E Sujanthi, S Senthil Kumar, Rengarajan Venkatesan
RESUMEN

Herein we report the covalent grafting of chitosan on graphene oxide (GO) followed by a simple approach for anchoring silver (AgNPs) and gold (AuNPs) nanoparticles onto a chitosan grafted graphene oxide surface by a NaBH4 reduction method. Catalytic activity of prepared heterogeneous GO grafted chitosan stabilized silver and gold nanocatalysts (GO-Chit-Ag/AuNPs) was explored for the reduction of aromatic nitroarenes and degradation of hazardous azo dyes in the presence of NaBH4. Both catalysts were found to exhibit excellent catalytic activity towards the reduction of aromatic nitroarenes and azo dyes degradation. Furthermore, the nanocatalysts were found to be selective towards the reduction of nitro groups in halonitroarenes without any dehalogenation under mild conditions.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
Sodium borohydride, ReagentPlus®, 99%
Sigma-Aldrich
Sodium borohydride, granular, 10-40 mesh, 98%
Sigma-Aldrich
Sodium borohydride, purum p.a., ≥96% (gas-volumetric)
Sigma-Aldrich
Sodium borohydride, granular, 99.99% trace metals basis
Sigma-Aldrich
Sodium borohydride, powder, ≥98.0%
Sigma-Aldrich
Sodium borohydride, caplets (18 × 10 × 8 mm), 98%
Sigma-Aldrich
Sodium borohydride, 90% NaBH4 basis, pellets, diam. 8 mm, Cobalt (Doped)
Sigma-Aldrich
Sodium borohydride, hydrogen-storage grade, 98%
Supelco
Hydrogen peroxide solution, ≥30%, for trace analysis
Sigma-Aldrich
Hydrogen peroxide solution, 34.5-36.5%
Sigma-Aldrich
Sodium nitrate, BioUltra, ≥99.0% (T)
Sigma-Aldrich
Methyl Orange, for microscopy (Hist.), indicator (pH 3.0-4.4)
Millipore
Hydrogen peroxide solution, 3%, suitable for microbiology
Sigma-Aldrich
Hydrogen peroxide solution, 30 % (w/w) in H2O, contains stabilizer
Sigma-Aldrich
Sodium nitrate, ≥99.0%, suitable for plant cell culture
Sigma-Aldrich
Sodium nitrate, BioXtra, ≥99.0%
Sigma-Aldrich
Sodium borohydride solution, 0.5 M in 2-methoxyethyl ether
Sigma-Aldrich
Sodium borohydride solution, 2.0 M in triethylene glycol dimethyl ether
Sigma-Aldrich
Sodium borohydride solution, ~12 wt. % in 14 M NaOH
Sigma-Aldrich
Hydrogen peroxide solution, contains potassium stannate as inhibitor, 30-32 wt. % in water, semiconductor grade, 99.999% trace metals basis
Sigma-Aldrich
Sodium nitrate-14N, 99.95 atom % 14N
Sigma-Aldrich
Sodium nitrate, 99.995% trace metals basis
Sigma-Aldrich
Hydrogen peroxide solution, tested according to Ph. Eur.
Sigma-Aldrich
Methyl Orange, ACS reagent, Dye content 85 %
Supelco
Hydrogen peroxide solution, 30 % (w/w), for ultratrace analysis
Sigma-Aldrich
VenPure® SF, powder
Sigma-Aldrich
Sodium nitrate, ACS reagent, ≥99.0%
Sigma-Aldrich
Hydrogen peroxide solution, contains ~200 ppm acetanilide as stabilizer, 3 wt. % in H2O
Sigma-Aldrich
Hydrogen peroxide solution, 50 wt. % in H2O, stabilized
Sigma-Aldrich
Hydrogen peroxide solution, contains inhibitor, 35 wt. % in H2O