Iron-substituted SBA-15 microparticles: a peroxidase-like catalyst for H2O2 detection

Analyst. 2011 Dec 7;136(23):4894-7. doi: 10.1039/c1an15654c. Epub 2011 Sep 30.

Abstract

In this communication, we demonstrate our recent finding that iron-substituted SBA-15 (Fe-SBA-15) microparticles possess intrinsic peroxidase-like activity and can catalyze the oxidation of peroxidase substrate 3,3',5,5'-tetramethylbenzidine (TMB) by H(2)O(2) to develop a blue color in aqueous solution, leading to a simple approach towards colorimetric detection of H(2)O(2) with a linear detection range from 0.4 μM to 15 μM (r = 0.997) and a detection limit of 0.2 μM.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzidines / metabolism
  • Catalysis
  • Colorimetry / methods*
  • Hydrogen Peroxide / analysis*
  • Indicators and Reagents
  • Iron / chemistry
  • Metal Nanoparticles / chemistry*
  • Oxidation-Reduction
  • Peroxidases / metabolism
  • Silicon Dioxide / chemistry*

Substances

  • Benzidines
  • Indicators and Reagents
  • SBA-15
  • 3,3',5,5'-tetramethylbenzidine
  • Silicon Dioxide
  • Hydrogen Peroxide
  • Iron
  • Peroxidases