The photocatalytic splitting of water into H 2 and O 2 using semiconductors has received much attention, especially in terms of its potential application to the direct production of H 2 as a clean energy source. In this study, the H 2 yield increased with increasing reactor temperature, but the TiO 2 nanotube arrays collapsed after prolonged operation at temperatures over 75 °C. We found that aqueous Na 2SO 3 reagent was the best hole scavenger of the different aqueous solutions examined. Using the optimum temperatures and electrolytes, we conducted an experiment to produce H 2 from solutions with different pH values, and found that acidic conditions were better in terms of the amount of H 2 produced. The results obtained allowed us to identify the optimal temperature, electrolyte and pH conditions required to produce H 2 by photochemically splitting water.
All Science Journal Classification (ASJC) codes
- Biomedical Engineering
- Materials Science(all)
- Condensed Matter Physics