| 초록 |
This study reports the synthesis of cadmium sulfide (CdS) nanoparticles on Li+-inserted TiO2 nanotube array (Li-TNA) to fabricate Li-TNA/CdS heterojunction electrodes for photoelectrochemical (PEC) hydrogen production under air mass (AM) 1.5 light and solar visible light. Li+ was rapidly inserted into TNA pre-grown on Ti foil, and CdS is then photodeposited onto the Li-TNA electrodes for varying deposition times. In aqueous solutions of sulfide and sulfite, the Li-TNA/CdS exhibits an incident photon-to-current efficiency (IPCE) of∼ 20% (λ= 420 nm) while generating H2 at a Faradaic efficiency of∼100%. This PEC performance is superior to that of TNA/CdS, which is attributed to the Li+ enhanced charge transfer at the TNA/CdS interface. |
