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制备、表征了混合铝/铬金属氧化物柱撑α-磷酸锆(Al/Cr-ZrP),并对胶体化使用有机胺的种类、柱化液金属离子浓度以及金属离子用量等因素进行了研究。研究表明以乙醇胺为胶体化有机胺比使用正丙胺为胶体化有机胺所得到的产物的层间距更大;采用较低金属离子浓度、较高金属离子用量有利于Al/Cr-ZrP的合成。在Al/Cr比为1、以正丙胺为胶体化有机胺、金属离子浓度为0.067mol·L-1、金属离子用量为6.67CEC的条件下,制备出了混合金属氧化物柱撑α-磷酸锆,其层间距可达3.60nm,比表面积达到310m2·g-1。产物的高层间距、大比表面积主要来源于层间孔的形成,样品的吸脱附等温线的测定结果表明,Al/Cr-ZrP的层间孔道分布较窄,孔径主要集中分布于2.3nm左右。
The Al / Cr-ZrP mixed with aluminum / chromium metal oxide pillars was prepared and characterized, and the factors such as the type of organic amine, concentration of metal ions in column liquid and amount of metal ions were studied. . The results showed that the interlayer spacing of ethanolamine as colloidal organic amine was larger than that of n-propylamine as colloidal organic amine. The higher concentration of metal ions was beneficial to the synthesis of Al / Cr-ZrP with lower concentration of metal ions. Under the conditions of Al / Cr ratio of 1, n-propylamine as colloidal organic amine, metal ion concentration of 0.067 mol·L-1 and metal ion content of 6.67CEC, the mixed metal oxide pillared α-phosphoric acid Zirconium, the layer spacing up to 3.60nm, the specific surface area of 310m2 · g-1. The high-level spacing and large specific surface area of the products mainly originated from the formation of interlayer pores. The adsorption and desorption isotherms of the samples showed that the pore distribution of Al / Cr-ZrP was narrow and the pore size was mainly distributed around 2.3 nm .