Photocatalytic hydrogen evolution by oleic acid-capped CdS, CdSe, and CdS0.75Se0.25 alloy nanocrystals

Chemphyschem. 2014 Sep 15;15(13):2668-71. doi: 10.1002/cphc.201402229. Epub 2014 Jun 12.

Abstract

Photocatalytic generation of hydrogen by using oleic acid-capped CdS, CdSe, and CdS(0.75)Se(0.25) alloy nanocrystals (quantum dots) has been investigated under visible-light irradiation by employing Na(2)S and Na(2)SO(3) as hole scavengers. Highly photostable CdS(0.75)Se(0.25) alloy nanocrystals gave the highest hydrogen evolution rate (1466 μmol h(-1) g(-1)), which was about three times higher than that of CdS and seven times higher than that of CdSe.

Keywords: alloys; energy conversion; hydrogen; nanoparticles; quantum dots.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cadmium Compounds / chemistry*
  • Catalysis
  • Hydrogen / chemistry*
  • Nanoparticles / chemistry*
  • Oleic Acid / chemistry*
  • Photochemical Processes
  • Selenium Compounds / chemistry*
  • Sulfides / chemistry*

Substances

  • Cadmium Compounds
  • Selenium Compounds
  • Sulfides
  • cadmium sulfide
  • Oleic Acid
  • Hydrogen
  • cadmium selenide