Applied low bias with high frequency for enhancing mineralization ability of WO3 as visible-light-driven photocatalyst in gas phase
Applied low bias with high frequency for enhancing mineralization ability of WO3 as visible-light-driven photocatalyst in gas phase
复制标题
DOI：
10.1016/j.catcom.2011.09.037
复制
发表时间：
2011-11
影响因子：
3.7
通讯作者：
Yuan Liu;C. Xie;Tao Zou;Jie Li;Hao Chen;D. Zeng
中科院分区：
文献类型：
--
作者：
Yuan Liu;C. Xie;Tao Zou;Jie Li;Hao Chen;D. Zeng
研究了静态偏压（恒定值）和动态偏压（正弦波、半正弦波）下纳米WO3对甲苯的光电催化降解。光催化研究表明，与静态偏压相比，动态偏压具有更高的PEC协同效应。在1V 10MHz半正弦波下，光催化效率达到最大值，是无偏压时WO3的3.5倍。更重要的是，在低偏压和高频率下，除了提高效率的益处之外，还可以防止在降解过程中形成甲醛作为毒性更大的中间体。
The photoelectrocatalytic (PEC) degradation of toluene in the gas phase over nanosized WO3was investigated under both static bias (constant value) and dynamic bias (sine-wave, half sine-wave). The photocatalytic studies indicated that the dynamic bias had a higher PEC synergistic effect compared with the static bias. The photocatalytic efficiency reached the maximum value under 1V10MHz half sine-wave, which was 3.5 times that of WO3without any external bias. More importantly, under low bias with high frequency, besides the benefit of enhanced efficiency, the formation of formaldehyde as a more poisonous intermediate could also be prevented in the degradation process.