Sun Chunyan, Zhao Dan, Chen Chuncheng, Ma Wanhong, Zhao Jincai
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Environ Sci Technol. 2009 Jan 1;43(1):157-62. doi: 10.1021/es801929a.
In this work, we report the rapid photoreductive debromination of decabromodiphenyl ether (BDE209) byTiO2. The degradation of BDE209 is a stepwise process, and the bromines at the ortho positions are much more susceptible than those at the para positions. The photocatalytic degradation kinetics of BDE209 was further investigated under different reaction conditions (various solvents, in the presence of H2O, acids, or bases). A possible photoreductive debromination pathway was proposed on the basis of the identified reaction intermediates and density functional theory (DFT). This study provides a potential application of photocatalysis in removal of PBDE contamination.
在本工作中，我们报道了二氧化钛对十溴二苯醚（BDE209）的快速光还原脱溴反应。BDE209的降解是一个逐步过程，邻位的溴比邻位的溴更易反应。在不同反应条件下（各种溶剂、存在水、酸或碱）进一步研究了BDE209的光催化降解动力学。基于鉴定出的反应中间体和密度泛函理论（DFT）提出了一种可能的光还原脱溴途径。本研究为光催化在去除多溴二苯醚污染方面提供了潜在应用。
