Abstract

A three-channel model of interaction of the O₂ gas with zinc oxide during photoactivated oxygen isotope exchange (POIE) in a flow-through reactor is suggested including (1) photoadsorption, (2) exchange in the gas phase (homo-exchange), and (3) zinc oxide–gas exchange (hetero-exchange). In contrast to previous methods, the model includes photoadsorption as an increase in the rate of mixture renewal, which eliminates possible distortions of the time dependences of the calculated rates. Derivation of formulas and experimental data processing are given for POIE in the O₂–ZnO system used as an example, under illumination in interband and exciton absorption regions and in the region of absorption by defects in the structure of ZnO.

中文翻译：

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流动反应器中光活化同位素交换O 2⇄ZnO的动力学建模

摘要

建议在流通式反应器中光活化氧同位素交换（POIE）期间O ₂气体与氧化锌相互作用的三通道模型，包括（1）光吸附，（2）气相交换（均质交换） ，以及（3）氧化锌与气体的交换（异质交换）。与以前的方法相比，该模型将光吸附作为混合物更新速率的增加，从而消除了计算速率随时间变化的可能失真。以O ₂ -ZnO体系为例，在带间和激子吸收区以及ZnO结构缺陷吸收区的光照下，给出了POIE的公式推导和实验数据处理。