Voevodsky Institute of Chemical Kinetics and Combustion, 3 Institutskaya Str., 630090, Novosibirsk, Russian Federation.
Photochem Photobiol Sci. 2013 Nov;12(11):1939-47. doi: 10.1039/c3pp50112d.
Laser flash photolysis was applied to determine the primary photochemical processes over iron-containing clay (montmorillonite KSF), pillared interlayered clays (PILCs) and mesoporous mesophase iron silicate materials (MMMs). For KSF, the homogeneous photochemical reaction of Fe(III) leached from the clay material resulted in the formation of OH radicals, which were monitored by means of their reaction with methyl viologen dication (MV(2+)). For PILCs and MMMs, no leaching of Fe(III) to the solution nor hydroxyl radical formation were observed. Nevertheless, these catalysts were found to exhibit a sufficient effect on phenol photoionization. The increase in quantum yields of PhO radicals is caused by the effect of PILCs and MMMs and is explained by heterogeneous processes on the surface of catalyst particles.
激光闪光光解被应用于确定含铁粘土（蒙脱石 KSF）、层柱蒙脱石黏土（PILC）和中孔介孔铁硅酸盐材料（MMM）的初级光化学过程。对于 KSF，从粘土材料浸出的 Fe(III)的均相光化学反应导致 OH 自由基的形成，通过其与甲基紫精二阳离子（MV(2+)）的反应来监测。对于 PILC 和 MMM，没有 Fe(III)浸出到溶液中，也没有羟基自由基形成。然而，这些催化剂被发现对苯酚光离解有足够的影响。PhO 自由基量子产率的增加是由 PILC 和 MMM 的作用引起的，并通过催化剂颗粒表面的多相过程来解释。
