Global extensive concerns have been caused by polybrominated diphenyl ethers (PBDEs),because of their universal existence and potential toxicity in ecological environment. The use of solar energy, high selectivity and the mild reaction conditions make photocatalysis become a promising technique for the removal of these pollutants. Recently, great progress has been made in photocatalytic degradation of polyhalogenated organic pollutions. This review mainly focuses on TiO₂-based photocatalytic reduction of PBDEs, which are typical polyhalogenated aromatic hydrocarbons. The ways to improve photocatalytic reductive efficiency and the reaction mechanism have been described. In addition, the promising future of PBDEs photocatalytic reductive debromination is prospected.
Contents
1 Introduction
2 An overview of PBDEs
3 Photocatalytic reductive debromination of PBDEs
3.1 Photocatalytic reductive debromination based on TiO₂
3.2 Photoreductive debromination based on halogen bonding under visible light
4 Proton-coupled electron transfer based on photocatalytic reductive process of PBDEs
5 Conclusion