| 학회 | 한국재료학회 |
| 학술대회 | 2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 | 24권 1호 |
| 발표분야 | B. 나노화학/바이오 분과 |
| 제목 | Photocatalytic Hydrogen Evolution from Sub-Stoichiometric Colloidal WO3-x Nanowires and Synergistic Effect of WO3-x-Polyoxometalate Composites. |
| 초록 | Solar energy conversion and storage process have been heavily investigated as a response to growing energy consumption and environmental concerns. Solar-driven photocatalytic reactions catalyzed by semiconducting nanostructures are a promising class of processes to fulfil this demand. Among the various types of semiconducting solid-state materials, tungsten oxide is particularly interesting due to its unique optical properties and structural richness. Tungsten oxide is cheap, non-toxic, and earth abundant material and have been widely used for many industrial applications such as electrochromic devices, catalysts, gas sensors, and electronic devices. Here, we report the synthesis of oxygen-deficient WOx nanowires via a high-temperature non-aqueous colloidal process. Highly uniform WOx nanowires with large aspect ratio and very small diameter are synthesized in non-hydrolytic condensation reaction between metal halides and primary alcohols in the presence of primary amines. we observed stable hydrogen (H2) evolution from our WOx nanowires in photoreforming reactions using alcohols as electron donors. In addition, we observed dramatic enhancement of catalytic activity in H2 evolution when a novel nanocomposite system composed of WOx nanowires and polyoxometalate ligands is produced, suggesting synergistic interaction effect between semiconducting nanowires and catalytically active small inorganic clusters. "This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government (Ministry of Science, ICT & Future Planning) (No.2017R1C1B1005236)" |
| 저자 | Ho Young Woo1, Min Hye Kim2, Donguk Lee1, Soong Ju Oh2, Taejong Paik1 |
| 소속 | 1School of Integrative Engineering, 2Chung-Ang Univ. |
| 키워드 | Photocatalyst; photoreforming; nanocrystals; tungsten oxide; bandgap; polyoxometalate |
