Henan Normal University, Ministry of Education, Xinxiang, PR China.
Chemosphere. 2011 Jan;82(1):43-7. doi: 10.1016/j.chemosphere.2010.10.013. Epub 2010 Oct 30.
Polybrominated biphenyls have been widely used as flameretardants in textile and electronic industries, and additives in plastics. Over the past few decades, much attention has been given to polybrominated biphenyls in the environment and their effects on humans. In this paper, we studied on the degradation of 4,4'-dibromobiphenyl, a typical one of polybrominated biphenyls, through photoelectrocatalytic process with TiO₂, Zr/TiO₂ and Zr, N/TiO₂ nanotube arrays. The results showed that the photoelectrocatalytic process was more efficient than photocatalytic and electrolytic process alone. The results exhibited that the photoelectrocatalytic efficiency was significantly affected by the properties of the catalysts and bias potential, and the highest photoelectrocatalytic degradation rate was achieved with Zr, N/TiO₂ at 1 V and the order was Zr, N/TiO₂>Zr/TiO₂>TiO₂. The mechanism was also discussed by detecting the changes of pH value, bromine anion, total organic carbon and intermediates during the process.
多溴联苯已被广泛用作纺织和电子工业中的阻燃剂，以及塑料中的添加剂。在过去的几十年中，环境中的多溴联苯及其对人类的影响引起了广泛关注。在本文中，我们通过光电催化过程，使用 TiO₂、Zr/TiO₂和 Zr、N/TiO₂纳米管阵列，研究了典型的多溴联苯 4,4'-二溴联苯的降解。结果表明，光电催化过程比单独的光催化和电解过程更有效。结果表明，光电催化效率受催化剂和偏置电势的性质影响显著，在 1 V 时，Zr、N/TiO₂的光电催化降解率最高，顺序为 Zr、N/TiO₂>Zr/TiO₂>TiO₂。通过检测过程中 pH 值、溴阴离子、总有机碳和中间产物的变化，也讨论了该机制。
