期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
草酸作用下不同粒径纳米Fe3O4的光催化氧化合成及其磁性能
-
1. 河北师范大学化学与材料科学学院, 河北石家庄 050016;
2. 河北省水利水电第二勘测设计研究院监理公司, 河北石家庄 050021 -
DOI：
Synthesis of Variable-sized Fe3O4 Nanocrystals by Photocatalytic Oxidation in Presence of Oxalic Acid and Their Magnetic Properties
摘要/Abstract
采用空气氧化法，在可见光和微量草酸作用下，室温条件进行了不同粒径(10。5~30。2 nm)纳米Fe3O4的制备及其磁性能研究。结果表明:在可见光作用下，随草酸络合剂的添加，纳米Fe3O4的粒径减小，均匀性及分散性有所提高；在微量草酸存在下，随光照度的增强，纳米Fe3O4的粒径有所减小；Fe2+与草酸的络合增强了对可见光的利用率，加快了体系的氧化速率，高的反应速率使纳米Fe3O4晶粒减小；不同粒径纳米Fe3O4分别呈现出不同的磁性能。
The preparation of variable-sized(10.5～30.2 nm)Fe3O4 nanocrystals was discussed by air oxidation method under visible light irradiation at room temperature in the presence of trace oxalic acid and their magnetic properties were described.With adding the concentration of oxalic acid,the size of Fe3O4 particles reduced and the dispersibility of Fe3O4 particles increased under irradiation by visible light.The size of Fe3O4 particles decreased with the increasing of light intensity in the presence of trace oxalic acid.Fe2+-oxalic acid complex could enhance the absorbing of visible light.And the oxidation rate could be accelerated by visible light in the presence of oxalic acid.The rapid oxidation rate was favorable for decreasing the size of Fe3O4 nanocrystals.The variable-sized Fe3O4 nanocrystals exhibited different magnetic properties.