摘要
选取二氧化锰催化分解双氧水制取氧气的实验,通过文献研究和实验的手段,使用X射线衍射(XRD)、透射电镜(TEM)、红外光谱分析法(FT-IR)、X射线光电子能谱(XPS)等测试方法对反应催化前后的催化剂二氧化锰的显微成像、晶粒尺寸、颗粒尺寸、分子组成与结构和催化剂表面化学态的变动进行了表征。结果表明:该二氧化锰的晶型是α-MnO_(2),催化反应后的二氧化锰颗粒尺寸大小较催化反应前的二氧化锰颗粒尺寸变小,相应地其晶粒尺寸也随之变小,并且二氧化锰表面结合氧的含量比增多使催化剂具有良好的稳定性与重复性,物质分子组成结构没有发生变化,没有其他杂质的存在。从而联系催化剂的特性,为培养学生“宏观辨识与微观探析”素养,丰富课堂教学提供了教学素材。
Selecting the manganese dioxide catalytic decomposition of hydrogen peroxide to produce oxygen experiment,through the means of literature research and experiment,Using X-ray diffraction(XRD),transmission electron microscopy(TEM),infrared spectrometry(FT-IR),X-ray photoelectron spectroscopy(XPS),and other test methods of catalyst before and after the catalytic reaction of manganese dioxide microscopic imaging,grain size,particle size,molecular structure and the surface of the catalyst composition and chemical state of the changes have been characterized.The results showed that:The crystal type of manganese dioxide isα-MnO_(2),the particle size of manganese dioxide after reaction is smaller than that before reaction,accordingly grain size particle size is smaller,and the content of manganese dioxide surface combined with oxygen than increasing the catalyst has good stability and repeatability,material molecular structure has not changed,No other impurities are present.Thus,it provides teaching materials for cultivating students'"macroscopic identification and microcosmic analysis"and enriching classroom teaching by combining with the characteristics of catalysts.
作者
玛地娜·阿布力孜
粟智
Madina·Abliz;Su Zhi(Chemistry and Chemical Engineering Academy,Xinjiang Normal University,Urumqi 830054,China)
出处
《山东化工》
CAS
2021年第22期4-6,共3页
Shandong Chemical Industry
关键词
二氧化锰
双氧水
催化剂
宏观辨识与微观探析
教育教学
manganese dioxide
hydrogen peroxide
catalyst
macroscopic identification and microscopic analysi
seducation and teaching
