Jiang Zhanpeng, Wang Haiyan, Huang He, Cao Changchun
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, PR China.
Chemosphere. 2004 Aug;56(5):503-8. doi: 10.1016/j.chemosphere.2004.02.006.
According to the theory of photocatalysis, the efficiency of photocatalysis decreases mostly due to the recombination of photo-generated electron-hole pairs. An electric field across a photocatalyst can promote the separation of photo-generated electrons and holes and prevent them from recombination so as to enhance the efficiency of photocatalysis. And the synergetic decomposition efficiency of photocatalysis and an electric field is greater than that of the simple combine of their single efficiency. The performance of photocatalysis enhanced by electric field (PEEF) and operating conditions such as the direction of the electric field, the voltages between the two electrodes, the material of the electrodes, which may affect the efficiency of PEEF, were investigated in this paper. The results indicate that the system of PEEF abides the established theory of photocatalysis.
根据光催化理论，光催化效率的降低主要是由于光生电子 - 空穴对的复合。光催化剂两端的电场可以促进光生电子和空穴的分离，并防止它们复合，从而提高光催化效率。而且光催化与电场的协同分解效率大于它们单一效率简单相加的结果。本文研究了电场增强光催化（PEEF）的性能以及诸如电场方向、两电极之间的电压、电极材料等可能影响PEEF效率的操作条件。结果表明，PEEF体系符合已有的光催化理论。
