Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5395690 | Journal of Electron Spectroscopy and Related Phenomena | 2015 | 5 Pages |
Abstract
By combining X-ray absorption spectroscopy and first principles calculations we have determined the electronic structure of synthetic and natural kaolinite as a model system for engineered and natural clay materials. We have analyzed defect states in the band gap and find that both natural and synthetic kaolinite contain defects where oxygen replaces hydrogen in one of the Al (0Â 0Â 1)-hydroxyl groups of the kaolinite clay sheets. The band gap of both synthetic and natural kaolinite is found to decrease by about 3.2Â eV as this defect is formed.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
A. Pietzsch, J. Nisar, E. Jämstorp, J. GrÃ¥sjö, C. Ã
rhammar, R. Ahuja, J.-E. Rubensson,