废旧MoSi2回收产物烧结制备Fe2(MoO4)3的组织形貌和性能
Microstructure and properties of Fe2(MoO4)3 prepared by sintering recovery products from waste MoSi2
孔歌 1蔡小平 2冯培忠2
作者信息
- 1. 中国矿业大学图书馆,徐州 221116
- 2. 中国矿业大学材料与物理学院,徐州 221116
- 折叠
摘要
采用热蒸发法回收废旧MoSi2氧化煅烧产物MoO3,以回收MoO3粉末与Fe2O3为原料,经反应烧结制备Fe2(MoO4)3.讨论了 MoSi2完全氧化所需的时间和温度,并研究了 Fe2(MoO4)3材料的组织形貌、线收缩率、体积密度和光谱学性能.结果表明:废旧MoSi2材料粉末经500 ℃煅烧120 min以上时间即可完全氧化.在MoO3与Fe2O3反应烧结过程中,烧结温度越高,MoO3与Fe2O3反应越完全,所制备的Fe2(MoO4)3材料空隙随之增多,线收缩率升高,体积密度降低.与纯Fe2(MoO4)3材料相比,Fe2(MoO4)3和MoO3复合相的光生电子-空穴对更不易复合,理论光催化活性更高.以亚甲基蓝为染料,纯Fe2(MoO4)3对其具有良好的吸附性能,而Fe2(MoO4)3和MoO3复合相则表现出优异的光催化性能,且Fe2(MoO4)3和MoO3复合相的光催化降解循环稳定性最好.
Abstract
MoO3 was recovered from waste MoSi2 after oxidation roasting by thermal evaporation method,and Fe2(MoO4)3 was prepared by reaction sintering method using the recovered MoO3 and Fe2O3 as raw materials.The time and temperature for the complete oxidation of MoSi2 were discussed,and the microstructure,linear shrinkage,volume density,spectral properties of the prepared Fe2(MoO4)3 materials were studied.The results show that,the waste MoSi2 powders can be completely oxidized after calcination at 500 ℃ for more than 120 min.During the reaction sintering process of MoO3 and Fe2O3,the higher the sintering temperature,the more complete the reaction between MoO3 and Fe2O3;the void of the prepared Fe2(MoO4)3 materials increases,the line shrinkage rate increases,and the volume density decreases.Fluorescence spectrum analysis shows that,the photogenerated electron-hole pairs of the Fe2(MoO4)3 and MoO3 composite materials are more difficult to be recombined than those of the pure Fe2(MoO4)3,showing the higher photocatalytic activity for the composites.Using methylene blue as dye,the pure Fe2(MoO4)3 has the good adsorption performance,while the Fe2(MoO4)3 and MoO3 composites show the excellent photocatalytic performance,and the mixture of Fe2(MoO4)3 and MoO3 composites has the best photocatalytic degradation cycle stability.
关键词
废旧MoSi2回收/热蒸发/反应烧结/显微组织/光催化降解Key words
waste MoSi2 recycling/thermal evaporation/reactive sintering/microstructure/photocatalytic degradation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据