尖晶石型CuCr_2O_4纳米粉体的制备及应用

THE PREPARATION AND APPLICATION OF SPINEL CUCR_2O_4 NANO-POWDERS

采用醇-水共沉淀法,通过表面活性剂进行分散,制备尖晶石型CuCr2O4纳米粉体。讨论了烧结温度、表面活性剂对粉体制备的影响,并将粉体应用到染料敏化太阳能电池的光阳极。采用XRD、TEM、SEM、UV-vis、FT-IR分析对粉体进行了表征。结果表明:当烧结温度为1000℃、PEG400添加量为1.5%时,制备的CuCr2O4粉体分散最佳;掺杂CuCr2O4纳米粉体后能够提高电池的光电转化效率,与纯TiO2薄膜电极相比,光电转化效率提高了22.6%。

CuCr2O4 nanopowders were prepared by alcohol-aqueous coprecipitation process, and were dispersed by surface active agent. The effects of the sintering temperature and surface active agent on the particles and the application of nanopowders in the fabrication of photoanodes of dye-sensitized solar cells were discussed. The particles were characterized by XRD, TEM, SEM, UV-vis and FT-IR. The results showed： the sintering temperature is 1000℃; when the amount of PEG400 was 1.5%, the dispersion is best; doping CuCr2O4 nano-powder can improve the conversion of photoelectric efficiency of the solar cells, and compared with that of pure TiO2 film electrode, 11 increased 22.6%.