In Situ Synthesis of Gold Nanoparticles/Metal-Organic Gels Hybrids with Excellent Peroxidase-Like Activity for Sensitive Chemiluminescence Detection of Organophosphorus Pesticides

ACS Appl Mater Interfaces. 2018 Aug 29;10(34):28868-28876. doi: 10.1021/acsami.8b08768. Epub 2018 Aug 14.

Abstract

Until now, despite much progress in the study of metal-organic gels (MOGs), the modification of transition-metal containing MOGs with noble metal nanoparticles (NPs) is far from fully developed. Herein, iron-based MOGs nanosheet hybrids with gold NPs (AuNPs) immobilization were first synthesized by a facile in situ grown strategy at ambient conditions. It is found that the as-prepared AuNPs/MOGs (Fe) hybrids exhibited enhanced mimicking peroxidase-like activity, making them endowed with outstanding performance in chemiluminescence (CL) field in the presence of H2O2. The remarkable CL enhancement by AuNPs/MOGs (Fe) hybrids was attributed to the modification of AuNPs on MOGs (Fe) nanosheets, which could synergistically accelerate the CL reaction by speeding up the generation of OH, O2•-, and 1O2. Accordingly, a sensitive CL detection of organophosphorus pesticides was successfully achieved by the AuNPs/MOGs (Fe) hybrids CL enhancing system in the range of 5-800 nM with a detection limit of 1 nM. We envision that this highly active and novel enzyme mimetic catalyst can be applicable to other extended AuNPs/MOGs (Fe) hybrid-based CL systems for sensitive detection of various analytes.

Keywords: AuNPs/MOGs (Fe) hybrids; catalysis; chemiluminescence; detection; luminol, organophosphorus pesticides.

MeSH terms

  • Gels
  • Gold
  • Hydrogen Peroxide
  • Luminescent Measurements
  • Luminol
  • Metal Nanoparticles
  • Pesticides / chemistry*

Substances

  • Gels
  • Pesticides
  • Luminol
  • Gold
  • Hydrogen Peroxide