Photoanodic response of hematite electrode to citric acid in aqueous solution
Abstract The iron oxide film was prepared by the current pulse deposition on a titanium substrate in aqueous solution of 10mM FeCl 2 –0.15M NaCl under O 2 bubbling. The hematite structure of the deposited film after heat treatment under air was confirmed by the measurement of XRD and Raman spectrum. The Mott-Schottky plots of the hematite electrode/aqueous Na 2 SO 4 solution showed the flat-band potential of −0.57V vs. Ag/AgCl and the carrier density of 1.35×10 18 cm −3 for the hematite electrode. A marked increase in photocurrent was observed on the hematite electrode in the presence of citric acid under irradiation of visible light with wavelength of 490nm. The HPLC analysis indicated the occurrence of oxidation of citric acid to acetonedicarboxylic acid with the current efficiency of 100% in this photoanodic process. Highlights The hematite film was prepared by current pulse method in aqueous NaCl solution containing Fe(Cl) 2 under O 2 bubbling and heat treatment in air. The hematite photoelectrode showed a marked increase in photocurrent in the presence of citric acid. The photoanodic oxidation of citric acid to acetonedicarboxylic acid with the current efficiency of 100 % proceeded in the visible light irradiation.
- 원문이 없습니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기