A General Phase-Transfer Protocol for Mineral Acids and Its Application in the Large-Scale Synthesis of Highly Nanoporous Iron Phosphate in Nonaqueous Solvent
详细信息 查看全文
- 作者：Junmei Zhao ; Jie Ma ; Zelang Jian ; Yongsheng Hu ; Huizhou Liu
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2012
- 出版时间：September 19, 2012
- 年：2012
- 卷：51
- 期：37
- 页码：12025-12030
- 全文大小：305K
- 年卷期：v.51,no.37(September 19, 2012)
- ISSN：1520-5045
文摘
As a general protocol for transferring mineral acids from an aqueous solution to an organic phase, mineral acids are extracted with secondary carbon primary amine (C9鈥?1)2CHNH2 (commercial code: N1923) into an organic phase (e.g., heptane or benzene) because of the complexation reaction and the formation of typical reversed micelles. Based on this principle, a novel approach for a large-scale synthesis of highly nanoporous iron phosphate particles is developed via the formed RNH3+/H2PO4鈥?/sup> (H2O)/oil reversed micelle system and ethanol鈥揊e3+ solutions. Synthetic conditions, such as H3PO4 concentration in reversed micelles and Fe3+ concentration in ethanol鈥揊e3+ solution are investigated and optimized. The product is characterized using transmission electron microscopy, Brunauer鈥揈mett鈥揟eller, thermogravimetric analysis, X-ray diffraction, and Fourier transform infrared spectroscopy. The as-obtained iron phosphate is flocculent and highly porous, exhibiting a high reported surface area of 144 m2/g. The synthetic procedure is relatively simple and is suitable for large-scale fabrication, and the used organic amines can be recycled. The power of this approach is demonstrated using other kinds of organic amines, such as tri-n-octylamine (TOA) and tri-C8鈥?0-alkylmethyl ammonium chloride (N263), as phase-transfer reagents exhibiting promising application in the synthesis of highly nanoporous materials.