수소제조용 CdS 입자막 전극의 표면처리 효과

다국어 초록 (Multilingual Abstract)

To improve the photochemical energy conversion efficiency and the stability of CdS particulate film electrode which is used to produce hydrogen from the aqueous H₂S solution photoelectrochemically, surface treatment of this film was carried out using TiCl₄ solution. CdS particles for preparation of the films were synthesized by precipitation reaction of Cd(NO₃)₂·9H₂O and Na₂S·4H₂O. Then, the CdS sol was hydrothermally treated for 12hr in an autoclave with the variation of treatment temperature to control the crystalline phase of particles. CdS film electrode was thus prepared by annealing at 400? for 12hr of the wet-film cast at room temperature, and subsequently surface treated with TiCl₄ solution. The electrodes were characterized using XRD, SEM, and the photocurrent meter. The photocurrents of Cds film electrodes prepared with surface treatment were up to two times higher than the electrodes without surface treatment, indicating about 4.0 mA/cm². Hydrogen production rate in a continuous flow system using photoelectrochemical or photochemical cells prepared with surface treatment also increased in proportion to the increase of photocurrents.