significant difference between the Pd–TiO2 and pristine TiO2 systems, and much less position selectivity for the debromination on Pd–TiO2 was observed than that on the pristine TiO2 surface. For another polybrominateddiphenylether (BDE15), pristine TiO2 was incapable of its photocatalytic reduction, whereas the loading of Pd enabled its debromination to diphenylether within 20 min. In addition, an evident