Efficient photocatalytic reductive dechlorination of 4-chlorophenol to phenol on {0Â 0Â 1}/{1Â 0Â 1} facets co-exposed TiO2 nanocrystals

- 4-Chlorophenol is dechlorinated over {0 0 1}/{1 0 1} co-exposed TiO2 nanocrystals.
- Photo-electrons are accumulated on {1 0 1} facets due to surface heterojunction.
- Fluorine will trap photoelectrons to depress the dechlorination performance.
- Sufficient isopropanol promotes the dechlorination activity and selectivity.