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采用水热法制备单分散、粒径均一的碱式碳酸钇(Y(OH)CO3)前驱体,经过高温煅烧处理得到氧化钇(Y_2O_3)空心纳米花。通过傅里叶转换红外分析(FT-IR),场发射扫描电子显微镜(FESEM),透射电子显微镜(TEM),X射线衍射(XRD),X射线能谱(XPS)以及N2吸-脱附等来表征样品,并研究了Y_2O_3空心纳米花吸附重铬酸钾(K2Cr2O7)的能力。实验结果表明:水热法制备的前驱体为Y(OH)CO3,经高温煅烧处理得到立方相Y_2O_3空心纳米花,尺寸约140 nm,比表面积为15 m2·g-1,讨论了Y_2O_3空心纳米花的形成机理。水热法制备的Y_2O_3空心纳米花对K2Cr2O7溶液的去除率可高达88.5%,吸附量为11.06 mg·g-1,约为Y_2O_3粉末的6倍。
Hydrothermal synthesis of mono-dispersed yttrium carbonate (Y (OH) CO3) precursors with uniform particle size resulted in the formation of Y_2O_3 hollow nanoflowers after calcination at high temperature. FTIR, FESEM, TEM, XRD, XPS and N2sorption-desorption were performed by Fourier transform infrared spectroscopy (FT-IR) The samples were characterized and the ability of Y_2O_3 hollow nanometer flower to adsorb potassium dichromate (K2Cr2O7) was studied. The experimental results showed that the precursors prepared by hydrothermal method were Y (OH) CO3, and the cubic hollow phase Y_2O_3 hollow nanoflowers were obtained by calcination at high temperature with the size of about 140 nm and the specific surface area of 15 m2 · g-1. The effects of Y_2O_3 hollow nanometer Flower formation mechanism. The removal rate of K2Cr2O7 solution prepared by hydrothermal method was up to 88.5% and the adsorption capacity was 11.06 mg · g-1, which was about 6 times that of Y_2O_3 powder.