Effective hydrogen generation from the hydrogen sulfide solution by using stratified type photocatalyst

H. Takahashi, S. Yokoyama, Y. Baba, T. Hayashi, Kazuyuki Tohji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Stratified type photocatalyst with the extremely higher photocatalytic activities can be synthesized by using the chemical reaction between the Na 2S solution and Cd(OH)2 precursors. This type of photocatalyst has the specific morphology which constructed by the nano-sized and capsule like formed structure, and the metal concentration was gradually changed in its wall. The "charge gradient" was formed at the metal sulfide and oxide/hydroxide junction in the wall, which favored for the separation of the photo excited electron-hole pair. Consequently, stratified type photocatalyst shows the high catalytic activity than the usual nano CdS particles. By the addition of sulfur compound into the bio reactor contained the sulfur reducing bacteria, the H2S gas concentration can increased to about 1000 times enlarge than the usual condition. Therefore, we can conclude that the enhancement of the H2S gas evolved from the bio reactor was successfully achievement, and we don't need to afraid the shortage risk of H2S supply. These H2S gas concentration can enlarged to 80% by using A type zeorite. Especially, Ca-A type zeorite is considered as the suitable material.

Original languageEnglish
Title of host publicationWater Dynamics - 5th International Workshop on Water Dynamics
Number of pages5
Publication statusPublished - 2008 Mar 17
Event5th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2007 Sep 252007 Sep 27

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other5th International Workshop on Water Dynamics


  • Hydrogen evolution
  • Stratified type photocatalyst
  • Sulfur cycle

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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