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| 论文编号: |
122214O120120030 |
| 第一作者所在部门: |
合成油 |
| 中文论文题目: |
Factors controlling pure-phase magnetic BiFeO3 powders synthesized by solution combustion synthesis
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| 英文论文题目: |
Factors controlling pure-phase magnetic BiFeO3 powders synthesized by solution combustion synthesis
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| 论文题目英文: |
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| 作者: |
杨军
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| 论文出处: |
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| 刊物名称: |
Journal of Alloys and Compounds
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| 年: |
2011
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| 卷: |
509 |
| 期: |
37 |
| 页: |
9271 |
| 联系作者: |
杨军 |
| 收录类别: |
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| 影响因子: |
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| 摘要: |
Bismuth ferric oxide nanopowders were prepared through combustion method. Pure phase and wellcrystallized BiFeO3 can be obtained by controlling the combustion process, fuel type and fuel-to-oxidant ratio. The evolutions of phase constitution and structural characteristics of the as-resulted nanopowders were investigated by X-ray diffraction, scanning electron microscope, and simultaneous thermogravimetric analysis. The results revealed that both the type and amount of fuel have to be carefully considered because they play an important role in total reaction characteristics. Among all tested fuels, l- -alanine and glycine are the suitable fuels for BiFeO3 synthesis. For -alanine, the optimal fuel-to-oxidant ratio is 0.22, which results in a suitable flame temperature for BiFeO3 formation. Still, too little fuel would result in only amorphous phase powders due to the low flame temperature and too much fuel would lead to transformation of the BiFeO3 phase to impurities because of the high flame temperature involved. The resulting BiFeO3 nanopowders exhibited strong H2O2-activiting ability and weak magnetism. When BiFeO3 nanopowders were used as a heterogeneous Fenton-like catalyst to degrade rhodamine B (RhB),the apparent rate constant for RhB degradation in the presence of H2O2 at pH 5.0 was evaluated to be 0.048 min？1. |
| 英文摘要: |
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| 备注: |
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