| Grant number: | 17/03135-5 |
| Support type: | Regular Research Grants |
| Duration: | July 01, 2017 - June 30, 2019 |
| Field of knowledge: | Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials |
| Principal Investigator: | Edson Roberto Leite |
| Grantee: | Edson Roberto Leite |
| Home Institution: | Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil |
Abstract
Hematite (Fe2O3) is an important n-type semiconductor, with great potential as a photoanode to generate hydrogen from the water splitting and sunlight. The efficiency of this semiconductor depends greatly on its electronic conductivity and the presence of grain boundary can be a serious obstacle. In this proposal, we intend to identify the types of grain boundaries present in micro and nanostructured polycrystalline ceramics of pure Fe2O3 and doped with Sn4+. In addition, we intend to obtain nanostructured polycrystalline ceramics of Fe2O3 doped with Sn4+ with higher electronic conductivity than a doped material with the same level and type of impurity, but with micrometric grain. In fact, in an innovative way we will show that the grain boundary segregation can generate more conductive materials and we will explore this phenomenon to obtain semiconductor oxides with high electronic conductivity (AU)