纳米NiAl_2O_4粉体的制备与表征

Synthesis and Characterization of NiAl_2O_4 Nano-powders

采用醇-水共沉淀法制备NiAl2O4纳米粉体,PEG6000作分散剂。通过XRD,TEM及FT-IR等测试手段,研究醇-水比对粉体晶粒度的影响以及PEG6000对NiAl2O4粉体分散性能的影响。结果表明:醇-水的最佳比例为1∶1,此时粉体的晶粒尺寸趋于最小。在沉淀过程中加入PEG6000,可避免前躯体粒子的团聚及粉体在焙烧过程中形成的团聚,改善了粉体的分散性。将制备的NiAl2O4纳米粉体掺合到染料敏化太阳能电池TiO2光阳极中,电池的光电转换效率得到明显的改善。

iAl2O4 nano-powders were synthesised by coprecipitation process of alcohol-aqueous, PEG6000 served as dispersant. The effects of the ratio of alchohol-aqueous on the grain size of powders and the PEG6000 on dispersion characteritics of NiA1204 nano-powders were investigated by XRD, TEM analysis, and FT-IR spectrum. The results indicate that the optimal ratio of alcohol-aqueous is 1 ： 1, in this case the grain size of the powders tend to minimum. By adding the PEG6000 in the deposition process, the reunion of precursor particles and the powder in roasting process can be avoided obviously. And then, the dispersion of the powder was improved significantly. Therefore, after adopting the NiA1204 nano-powders to the TiO2 film of dye-sensitized solar cells, the photoelectric conversion efficiency of the battery increases efficiently.