| 초록 |
In this study, BiVO4 photoanode is prepared via the chemical reaction of electrodeposited Bi metal electrode with a vanadium precursor, and the electrodeposition conditions for the Bi electrode. The nucleation and growth kinetics of Bi dendrites are varied by conditions. Specifically, the morphology, particle size, porosity, and facet exposure of BiVO4 are changed according to the applied potential and temperature during the electrodeposition of Bi. The decrease in particle size and increase in porosity and active facet exposure under optimized conditions are responsible for the improved photoelectrochemical performance. The photocurrent density of BiVO4 prepared under optimized condition is over 5 mA cm−2 at 1.25 VRHE for sulfite oxidation; this represents an improvement of almost 2.5 times compared to that of non-optimized BiVO4. |
