| 水热法制备氧化钇空心纳米花及其吸附性能 |
| Yttria Hollow Nano-Flowers Synthesized by Hydrothermal Method and Their Adsorption Capacity |
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| 摘要: 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(Y2O3)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Y2O3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Y2O3空心纳米花，尺寸约140 nm，比表面积为15 m2·g-1，讨论了Y2O3空心纳米花的形成机理。水热法制备的Y2O3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Y2O3粉末的6倍。 |
| 关键词: 氧化钇 空心纳米花 水热法 吸附 |
| 基金项目: 国家自然科学基金（No.51273154）资助项目。 |
| Abstract: Uniform-sized and monodisperse carbonate hydroxide yttrium (Y(OH)CO3) precursor were synthesized by hydrothermal method, and then Yttria (Y2O3) hollow nano-flower were obtained through high temperature calcination. The obtained products were characterized by fourier transform infrared spectroscopy (FT-IR), field-emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS), specific surface area and pore size distribution, the adsorption capacity of Y2O3 hollow nano-flowers for potassium dichromate (K2Cr2O7) was investigated. Results indicate that the precursors are Y(OH)CO3, the Y2O3 hollow nano-flowers with cubic fluorite structure were obtained through high-temperature calcination, the size of Y2O3 is about 140 nm and their specific surface area is 15 m2·g-1. The formation mechanism of Y2O3 hollow nano-flowers was proposed. The Y2O3 hollow nano-flowers show an excellent adsorption of K2Cr2O7 solutions at room temperature and their removal rate is about 88.5%, the maximum adsorption capacity is 11.06 mg·g-1, which is 6 times of Y2O3 powders. |
| Keywords: yttria hollow nano-flowers hydrothermal method adsorption |
| 投稿时间：2015-11-30 修订日期：2016-03-17 |
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| 江学良,张姣,余露,游峰.水热法制备氧化钇空心纳米花及其吸附性能[J].无机化学学报,2016,32(8):1337-1344. |
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