| 학회 | 한국재료학회 |
| 학술대회 | 2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 | 22권 1호 |
| 발표분야 | E. 환경/센서 재료분과 |
| 제목 | Preparation, Characterization and Photo-electrochemical Investigation of Cobalt oxide Nanoparticles Sensitized on TiO2 Nanorods/FTO |
| 초록 | Multi-junction photo-electrode for overall water splitting is always challenging on the basis of electronic and thermodynamic requirements. A tandem nanostructure consisting of n-type and p-type semiconductors for overall water splitting is always desirable without external bias. It is very well known that titanium dioxide (TiO2) nanostructures reported to have high chemical stability, low cost, abundance as well as the favorable band edge alignment with water redox potentials which make them a potential candidate as photo-anodes for water oxidation which have been extensively studied. Cobalt oxide systems (Co3O4 and CoO) are well studied in the field of photo-catalysis. The p-type Co3O4 and CoO have a band gap of 2.1 and 2.6 eV respectively. Co3O4 based systems have got wide variety of applications such as heterogeneous catalysis, Li-ion batteries, photo-catalysis, solar absorbers etc. It is reported that when microcrystalline CoO is changed to nano-crystalline state, band gap position changes drastically, enabling it for overall water splitting. The p-type CoO nanostructures could be an efficient photocathode. So by coupling Cobalt oxide with TiO2 with specific nanostructures could be crucial for overall water splitting. In the present work, we compared the photo-catalytic activity of different configurations of combined systems constituted by Cobalt oxide nano-structure with TiO2 nanorods grown on FTO substrate. TiO2 nanorods were grown on FTO by hydrothermal synthesis. Cobalt oxide nanoparticles were deposited on TiO2 nanorods by electrodeposition followed by Rapid Thermal Annealing. The detailed structural investigation of as-prepared system with improved photoelectrochemical properties will be reported. |
| 저자 | Vivek Ramakrishnan, 양비룡 |
| 소속 | 금오공과대 |
| 키워드 | <P>Photo-electrochemistry; Cobalt oxide; Titanium dioxde; nanostructures</P> |
