银在光催化分解NO反应中的光催化行为研究

Behavior of Different Silver Species in the Photocatalytic Decomposition of NO over Ag/H-ZSM-5 Catalyst

以光催化分解NO反应为探针,研究了负载银催化剂在紫外光激发作用下光催化分解NO反应的催化行为.对银物种的调变会对银的光催化活性产生显著影响,结合XRD(X射线粉末衍射),UV-vis(紫外可见漫反射)等表征手段对反应中起重要作用的活性银物种的表征结果表明,高度分散于分子筛内的银离子及银簇是光催化分解NO的活性中心.

UV irradiation of Ag/H-ZSM-5 catalyst prepared by an conventional impregnation method in the presence of NO leads leaded to the photocatalytic decomposition of NO into N2 and O2. The catalysts were characterized by using XRD,UV-vis diffuse spectroscopy,it was found that both high-dispersed Ag ions and Ag clusters played important role in the reaction. Ag^＋ was sensitive to higher temperature,however,silver amino complex ions supported on the zeolite can could be pretreated in lower temperature which is was able to acquire more silver ions and silver clusters.