| CuSAPO-5分子筛的合成、表征及对甲苯吸附性能 |
| Synthesis and Characterization of CuSAPO-5 Molecular Sieve for Toluene Adsorption |
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| 摘要: 采用水热合成法，以三乙烯四胺(TETA)为模板剂，合成CuSAPO-5分子筛。通过扫描电子显微镜(SEM)、粉末X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、热重(TG)、N2吸附及元素分析等手段对分子筛样品进行表征，考察了不同硅铝比对合成分子筛晶体的影响，并测定了分子筛样品对甲苯的吸附性能。结果表明，将合成液的pH值调节为4.8～5.0，于150～170℃晶化1 d，可合成晶体形貌为球体的CuSAPO-5分子筛，粒径约为30μm。分子筛样品具有较好的热稳定性，仍保持了SAPO-5分子筛的AFI骨架结构，属于微孔分子筛，孔径约为0.70nm，比表面积约为265 m2·g-1。元素分析结果表明分子筛中P、Si、Al和Cu的含量分别为12.56%、4.48%、7.17%和6.25%。样品对甲苯的吸附约在120 min时达到饱和，吸附量约为180 mg·g-1。 |
| 关键词: CuSAPO-5分子筛 合成 磷酸硅铝 吸附 |
| 基金项目: 国家自然科学基金（No.21473096）、福建省教育厅中青年项目（No.JB14124）、宁德市科技局项目（No.20140163）和宁德师范学院服务海西项目（No.2013F08）资助。 |
| Abstract: Microspheres CuSAPO-5 molecular sieves with 30 μm in diameter were synthesized under the hydrothermal condition with triethylenetetramine as template. The feature of CuSAPO-5 were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), thermogravimetry (TG), N2 adsorption and elemental analysis. The results showed that when crystallization temperature was between 150 and 170℃ for 1 d and with pH value of 4.8~5.0, CuSAPO-5 molecular sieves showed good crystallinity and still remained AFI structure of SAPO-5 with good thermal stability, pore diameter (0.7 nm), and specific surface area (265 m2·g-1). Effects of the silica-alumina ratio for the synthesis of molecular sieves and the toluene adsorption capability of the products were investigated. The elemental analyzer indicated that the contents of P, Si, Al and Cu were 12.56%, 4.48%, 7.17% and 6.25% in the CuSAPO-5 molecular sieves; The highest toluene adsorption were obtained at around the 120 min and absorption of about 180 mg·g-1. |
| Keywords: CuSAPO-5 molecular sieves synthesis silicoaluminophosphate adsorption |
| 投稿时间：2016-01-27 修订日期：2016-05-08 |
| 摘要点击次数: 1993 |
| 全文下载次数: 1290 |
| 罗五魁,颜桂炀,李世荣.CuSAPO-5分子筛的合成、表征及对甲苯吸附性能[J].无机化学学报,2016,32(8):1370-1374. |
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