MnO2基材料常温催化降解甲醛研究进展  

Research progress on room-temperature catalytic degradation of formaldehyde over MnO2-based catalysts

作　　者：刘亚茹 黄宇[1,3] LIU Yaru;HUANG Yu(State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Aerosol Chemistry and Physics,Chinese Academy of Sciences,Xi’an 710061,China)

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安710061 [2]中国科学院大学,北京100049 [3]中国科学院气溶胶化学与物理重点实验室,西安710061

出　　处：《地球环境学报》2020年第1期14-30,共17页Journal of Earth Environment

摘　　要：甲醛(HCHO)是室内空气中的主要污染物之一,已被世界卫生组织确定为致癌和致畸形物质,对人体健康构成了极大威胁。常温催化技术在室温下即可将甲醛降解为无毒无害的CO2和H2O,能耗低,具有较好的应用前景。二氧化锰(MnO2)具有价格低廉、环境友好等优势,且晶型种类多,表现出优异的甲醛催化性能,具有较大的实际应用价值而被广泛研究。本文综述了MnO2基催化剂,包括离子掺杂MnO2、MnO2固溶体和负载型MnO2的甲醛催化活性及其制备方法,并探讨了其活性影响因素、常温催化反应机理,分析了其研究现状及发展趋势。Background,aim,and scope Formaldehyde(HCHO),a potential carcinogen,usually exists at high concentration in indoor air,which poses a serious threat on human health.Therefore,it is essential to explore efficient methods to remove formaldehyde.The catalytic technologies for formaldehyde removal at room temperature can fully degrade formaldehyde with low energy consumption.It is the most promising method to remove indoor formaldehyde.The valence state of Mn element ranges from+2 to+7,and MnO2 possesses four different crystal phases consisting of unique[MnO6]octahedral structure,which allows MnO2-based materials to have excellent low-temperature redox ability.Thus,MnO2-based materials are the most promising catalysts to degrade HCHO of low concentration at room temperature.It is of great practical significance to review the application of MnO2-based materials in the catalytical degradation of formaldehyde at room temperature.In this paper,the structure-activity relationship of doped MnO2,MnO2 composites and supported MnO2 at room temperature were discussed in terms of formaldehyde degradation.And the potential application of MnO2-based materials in the degradation of formaldehyde at room temperature was also discussed.Materials and methods A total of 63 articles were retrieved by WOS(Web of Science)retrieval TS=(HCHO*AND MnO2)from all databases before 2019-04-03,and more relevant literatures were found through the references,similar literatures and cited literatures of these articles.And the factors affecting the catalytic activity of MnO2-based materials for HCHO degradation at room temperature and the corresponding catalytic mechanism were summarized based on these articles.The potential research areas for the catalytic removal of formaldehyde at ambient temperature were proposed.Results Among the formaldehyde catalytic materials,the precious metal-based catalysts can convert formaldehyde of high concentration into CO2 and H2O at room temperature,while the MnO2-based materials of the transition metal oxide-based cat

关 键 词：MnO2基催化剂 甲醛降解 常温催化 反应机理 影响因素 

分 类 号：X701[环境科学与工程—环境工程]