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[求助]
钒铁尖晶石FeV2O4和铬铁尖晶石FeCr2O4
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本人需要纯的FeV2O4和FeCr2O4进行一些实验，但是似乎纯的FeV2O4和FeCr2O4无法购买到，看到文献上有些是自己合成的，但是自己实验室实验条件有限，无法进行合成，所以看看有没有实验室有这个条件的，可以合成之后我们购买，也可以借用设备自己合成。具体的合成方法如下： FeCr2O4的合成方法： Pellets were prepared by compaction of thoroughly mixed powder of analytical pure Fe and briquettes were held in an iron crucible and heated at 1100oC for about 10 hours to form FeO. Then the compacted pellets of mixed FeO and Cr2O3 were treated under the same condition for 48 hours. X-ray diffraction patterns for the synthetic FeCr2O4 were shown in Fig. 1, which confirmed the product was pure enough for the conduction of reduction experiments. FeV2O4的合成方法： This method consists of the following steps: (i) a 2 : 1 stoichiometric mixture of V2O3 and 349 Fe3O4 is ground to form a homogeneous mixture. However, in this study, the two oxides were stirred in petroleum ether for = 18 h; (ii) the mixture is heated in a resistively heated tube furnace at 1100’ C under a 4.5 : 1 CO-CO, dynamic atmosphere. This temperature, as well as the atmospheric conditions, is maintained for 24 h; (iii) the FeV,O, is cooled to ambient temperatures in the CO-CO, atmosphere and is subsequently checked for unreacted Fe,O, and V,O, by X-ray powder diffraction (XRPD) (iv) steps (ii) and (iii) are repeated until no starting materials are detected. The total reaction time needed was found to be 48 h (stirred mixture) or 72 h (ground mixture). 多谢。。。。 |
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FeV2O4的合成方法： This method consists of the following steps: (i) a 2 : 1 stoichiometric mixture of V2O3 and Fe3O4 is ground to form a homogeneous mixture. However, in this study, the two oxides were stirred in petroleum ether for = 18 h; (ii) the mixture is heated in a resistively heated tube furnace at 1100’ C under a 4.5 : 1 CO-CO, dynamic atmosphere. This temperature, as well as the atmospheric conditions, is maintained for 24 h; (iii) the FeV2O4 is cooled to ambient temperatures in the CO-CO, atmosphere and is subsequently checked for unreacted Fe,O, and V,O, by X-ray powder diffraction (XRPD) (iv) steps (ii) and (iii) are repeated until no starting materials are detected. The total reaction time needed was found to be 48 h (stirred mixture) or 72 h (ground mixture). |
2楼2016-02-24 21:50:17