摘要
以MnC_(4)H_(6)O_(4)·4H_(2)O和NH_(4)HCO_(3)为原料,通过水热法制备了中空球形结构MnCO_(3)。基于MnCO_(3)在空气、氩气及氢气气氛中的TG-DSC分析结果,研究了MnCO_(3)在400~800℃、不同气氛中焙烧2 h后的产物变化。结果表明,空气中焙烧产物主要为MnO_(2)及Mn_(2)O_(3),氩气条件下焙烧产生的MnO被氧化为Mn_(3)O_(4),氢气条件下焙烧产物主要为MnO。不同气氛条件下焙烧后获得的MnO_(x)基本保持MnCO_(3)的形貌特征,且表面结构明显改善,有利于后续MnO_(x)的功能化应用。通过调控MnCO_(3)形貌及气氛焙烧条件,可制备不同形貌、价态、成分的锰氧化物及复合材料。
Hollow spherical manganese carbonate was successfully synthesized with hydrothermal method with MnC_(4)H_(6)O_(4)·4 H_(2)O and NH_(4)HCO_(3) as raw materials.Based on the TG-DSC analysis of MnCO_(3) under air,argon and hydrogen atmospheres,the phases of the powders obtained after 2-hour roasting at 400~800℃under different atmospheres were studied.Results show that the product obtained from the roasting under air condition is predominantly MnO_(2) and Mn_(2)O_(3),and the MnO generated from roasting in argon atmosphere is oxidized to Mn_(3)O_(4),while the products obtained from the roasting in hydrogen is mainly MnO.It is shown that the MnO_(x) obtained after roasting in different atmosphere almost maintain the same with MnCO_(3) in morphology,but have a great improvement in the surface structure,which is beneficial to the following functional application of MnO_(x).It is concluded that MnO_(x) with different morphologies,valence states and compositions can be prepared by adjusting the morphology of MnCO_(3) and roasting atmosphere.
作者
邹飞
黄春荣
蹇攀
邵学财
穆远慧
刘丰源
兰苑培
ZOU Fei;HUANG Chun-rong;JIAN Pan;SHAO Xue-cai;MU Yuan-hui;LIU Feng-yuan;LAN Yuan-pei(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,Guizhou,China;Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Conservation,Guiyang 550025,Guizhou,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2021年第4期156-160,共5页
Mining and Metallurgical Engineering
基金
国家自然科学基金(51804088)
黔科合基础([2020]1Y219,[2019]1082)
黔科合平台人才([2018]5781号,[2017]5788-37号)
贵大培育[2019]30号
贵大人基合字(2017)04
贵大省创字(2019022)。
关键词
碳酸锰
中空球形结构
MnO_(x)
热分解
水热法
焙烧
氧化锰
MnCO_(3)
hollow spherical structure
MnO_(x)
thermal decomposition
hydrothermal method
roasting
MnO
作者简介
邹飞(1997-),男,贵州麻江人,主要研究方向为催化材料制备及应用;通讯作者:兰苑培(1989-),男,四川乐山人,博士,副教授,主要研究方向为冶金资源环保、催化材料制备及应用。
