近日，广东工业大学环境健康与污染控制研究院、环境科学与工程学院安太成教授团队题为《Enhanced catalytic elimination of typical VOCs over ZnCoO_x catalyst derived from in situ pyrolysis of ZnCo bimetallic zeolitic imidazolate frameworks》的学术论文在Applied Catalysis B: Environmental (2022, 308: 121212)杂志上接受发表。论文的第一作者为博士后郭云龙，通讯作者为安太成教授。该研究工作主要是以双金属沸石咪唑骨架材料为前驱体和模板，通过原位热解制备掺杂Zn元素的金属氧化物催化剂，所制备催化剂在催化降解芳香类VOCs和环烷烃类VOCs时均表现出优异的催化活性和稳定性；通过吡啶红外实验和动力学模型研究，系统阐述了不同化学结构的VOCs在所制备催化剂上的催化降解机理。该研究工作可为大气环境领域中非贵金属催化剂的研发及典型VOCs的高效消除提供了新的研究方法和思路。

第一作者: 郭云龙 博士

通讯作者: 安太成 教授

通讯单位: 广东工业大学

论文DOI: https://doi.org/10.1016/j.apcatb.2022.121212

在本研究中，基于金属离子掺杂策略，通过原位热解ZnCo双金属沸石咪唑骨架材料（ZIFs）制备得到ZnCoO_x催化剂。其中Zn/Co摩尔比为0.05的Zn_0.05CoO_x催化剂在模拟实际大气环境条件下对苯、甲苯和环己烷都表现出了优异的催化活性和稳定性。通过吡啶红外技术，证明催化剂上布朗酸和路易斯酸都有利于环己烷分子降解，然而只有路易斯酸有利于苯和甲苯的催化消除。此外，重点研究了典型VOCs的化学结构对其在催化剂上的催化降解的影响。与苯和甲苯分子相比，环己烷分子更容易被催化消除，这归因于环己烷在催化剂上的强吸附作用以及环己烷特殊的化学结构。该研究工作可为高效低成本催化剂的研发以及大气环境中典型VOCs的高效消除提供理论与实验基础。

论文网址：https://doi.org/10.1016/j.apcatb.2022.121212

图片摘要：

论文的英文摘要附如下：

ABSTRACT:

In this work, ZnCoO_x catalysts were prepared using in situ pyrolysis of ZnCo bimetallic zeolitic imidazolate frameworks (ZIFs), which were rationally designed on the basis of a metal ion doping strategy. The derived Zn_0.05CoO_x with proper doping of Zn (Zn/Co molar ratio of 0.05) exhibited superior catalytic activity and durability towards catalytic elimination of different volatile organic compounds (VOCs) including benzene, toluene and cyclohexane under simulated real-exhaust conditions. Both Brønsted and Lewis acid sites were beneficial for cyclohexane degradation, whereas only Lewis acid sites were responsible for eliminations of benzene and toluene. In addition, the effect of chemical structures of VOCs on their catalytic elimination over Zn_0.05CoO_x was explored. Compared to benzene and toluene, cyclohexane molecule was more easily eliminated, attributed to strong adsorption onto catalyst and special chemical structure of cyclohexane. The obtained results can provide new strategy for rational design of highly efficient catalytic materials for eliminating VOCs.