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양극산화 TiO<sub>2</sub> 전극과 cross-linked P. furiosus 활용 물분해 수조제조
윤재경(Yoon, Jae-Kyung),박민성(Park, Min-Sung),허아영(Her, Ah-Young),심은정(Shim, Eun-Jung),주현규(Joo, Hyun-Ku) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
Anodized tubular titania (TiO₂) electrodes (ATTEs) are prepared and used as both the photoanode and the cathode substrate in a photoelectrochemical system designed to split water into hydrogen with the assistance of an enzyme and an external bias (solar cell). In particular, the ATTE used as the cathode substrate for the immobilization of the enzyme is prepared by two methods; adsorption and crosslinking. Results show that the optimized amount of enzyme is 10.98 units for the slurried enzyme, 3.66 units for the adsorbed one and 7.32 units for the crosslinked one, and the corresponding hydrogen evolution rates are 33.04, 148.58, and 234.88 umol/hr, respectively. The immobilized enzyme, specifically the chemically crosslinked one, seems to be much superior to the slurried enzyme, due to the enhanced charge-transfer process that is caused by the lower electrical resistance between the enzyme and the ATTE. This results in a greater number of accepted electrons and a larger amount of enzymes able to deal with the electrons.
심은정(Shim, Eun-Jung),박민성(Park, Min-Sung),허아영(Her, A-Young),주현규(Joo, Hyun-Ku),윤재경(Yoon, Jae-Kyung) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
The present works were performed that titanium foil was anodized in various dilution ratios of seawater and distilled water with 10V external voltage applied, then annealed at 450?C to obtain TiO₂ on the Ti substrate. The prepared samples were characterized by instruments (XRD, SEM, and photocurrent) and used to investigate rate of hydrogen production in photoelectrochemical cell as well as Cr(VI) reduction. As the results of experiments, the anodized TiO₂ in seawater electrolytes, which are ranged from 15 to 50 times dilution of seawater, was showed a relatively higher hydrogen production (ca. 97~110 umol/hr-cm²) and Cr(VI) reduction (ca. 95% reduction).