화학공학소재연구정보센터
Applied Surface Science, Vol.313, 26-30, 2014
Blacking of nano-CdS thin film from gas/liquid interface for enhanced photoelectrochemical performances
Thin films of CdS nanoparticles were prepared rapidly at gas/liquid interface by dropping Na2S ethanol solution onto CdCl2 solution surface with the help of a surfactant (dodecyl sulfate). The photoelectro-chemical cell that comprised of the prepared thin film photoanode of CdS nanoparticles and a Pt cathode generated a photocurrent density as high as 2.8 mAcm(-2) at a bias voltage of 0.6V under visible light illumination of 100 mWcm(-2) in an alkaline solution of methanol, which was larger than that in other solutions under investigation. It can be ascribed to methanol-assisted transformation of CdS nanopartides into black Cd/Cd(OH)(2)/CdS nanocomposites. At 2.8 mA, the decrease of bias voltage reached 2.49V for hydrogen production with a solar-to-electricity efficiency of 4.65%. (C) 2014 Elsevier B.V. All rights reserved.