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114th General Meeting of Korean Chemical Society Nanoporous hematite nanorods for the highly efficient photoelectrochemical cell

Submission Date :
8 / 28 / 2014 , 13 : 58 : 27
Abstract Number :
114082809238
Presenting Type:
Poster Presentation
Presenting Area :
전기화학
Authors :
안효진, 장지현1,*
울산과학기술대학교(UNIST) 친환경에너지공학부, Korea
1울산과학기술대학교(UNIST) 친환경 에너지 공학부, Korea
Assigned Code :
ELEC.P-1225 Assigend Code Guideline
Presenting Time :
10월 15일 (수요일) 16:00~19:00
The hierarchical nanoporous hematite nanorod has been synthesized by treating boric aicd in the FeCl3?6H2O3 solution. The [FeB(OH)4]2+ complex is synthesized and decoupled slowly into Fe3+ during hydrothermal growth process. The slow release of Fe3+ ions due to the presence of [FeB(OH)4]2+ complex triggers the creation of the small dimension of FeOOH which is converted to the hierarchical α-Fe2O3 after annealing process. The hierarchical nanoporous α-Fe2O3 composed of ~ 15nm domains showed a photocurrent density of 1.41 mA/cm2 at RHE 1.23V which is 1.7 times higher than that of pristine hematite. The small domain of α-Fe2O3 increased the charge transfer rate between hematite and electrolyte by reducing recombination.