One-pot hydrothermal synthesis of uniform β-MnO2 nanorods for nitrite sensing

J Colloid Interface Sci. 2011 Jul 1;359(1):1-8. doi: 10.1016/j.jcis.2011.03.087. Epub 2011 Apr 1.

Abstract

A simple hydrothermal method was developed for the synthesis of uniform single-crystal β-MnO(2) nanorods only using potassium permanganate and sodium nitrite in acidic solution, without any seed or template. The as-prepared β-MnO(2) nanorods have the average diameter of 300±20 nm and a length up to 1.2±0.2 μm. Moreover, the effects of pH, temperature, and reactant molar ratios on the morphology of the final product were studied in detail. In addition, the catalytic ability of the as-prepared β-MnO(2) nanorods was tested for the electrooxidation of nitrite. The resulting sensor showed a wide linear range from 0.29 μM to 26.09 mM (R=0.9986), high sensitivity (1.21 μA mM(-1), S/N=3), low detection limit (0.29 μM), and fast response (less than 5 s).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Hot Temperature*
  • Manganese Compounds / chemical synthesis*
  • Manganese Compounds / chemistry
  • Materials Testing
  • Nanotubes / chemistry*
  • Oxides / chemical synthesis*
  • Oxides / chemistry
  • Potassium Permanganate / chemistry
  • Sodium Nitrite / analysis*
  • Sodium Nitrite / chemistry*

Substances

  • Manganese Compounds
  • Oxides
  • Potassium Permanganate
  • manganese oxide
  • Sodium Nitrite