Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 51, Issue 10, Pages 5685-5694Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b00040
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Funding
- National Natural Science Funds for Distinguished Young Scholars [21425728]
- National Basic Research Program of China (973 Program) [2013CB632402]
- National Key Research and Development Program of China [2016YFA0203002]
- National Science Foundation of China [51472100]
- 111 Project [B17019]
- Excellent Doctorial Dissertation Cultivation Grant from Central China Normal University [2015YBZD018, 2016YBZZ034]
- CAS Interdisciplinary Innovation Team of the Chinese Academy of Sciences
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Understanding the chemistry of hydrogen peroxide (H2O2) decomposition and hydroxyl radical (center dot OH) transformation on the surface molecular level is a great challenge for the application of heterogeneous Fenton system in the fields of chemistry, environmental, and life science. We report in this study a conceptual oxygen vacancy associated surface Fenton system without any metal ions leaching, exhibiting unprecedented surface chemistry based on the oxygen vacancy of electron-donor nature for heterolytic H2O2 dissociation. By controlling the delicate surface structure of catalyst, this novel Fenton system allows the facile tuning of center dot OH existing form for targeted catalytic reactions with controlled reactivity and selectivity. On the model catalyst of BiOCI, the generated center dot OH tend to diffuse away from the (001) surface for the selective oxidation of dissolved pollutants in solution, but prefer to stay on the (010) surface, reacting with strongly adsorbed pollutants with high priority. These findings will extend the scope of Fenton catalysts via surface engineering and consolidate the fundamental theories of Fenton reactions for wide environmental applications.
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