十六烷基三甲基溴化铵插层α-磷酸锆复合物的合成、表征及其对酚的吸附机理  

Preparation,Characterization and Adsorption Mechanism for Phenols of CTMAB-ZrP

作　　者：姚微[1] 王红宁[1] 王建伍[1] 钟璟[1] 陈若愚[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《物理化学学报》2011年第7期1763-1771,共9页Acta Physico-Chimica Sinica

基　　金：江苏省自然科学基金(BK2008143)资助项目~~

摘　　要：利用甲胺消弱α-磷睃锆(α-ZrP)层间作用力,合成了不同十六烷基三甲基溴化铵(CTMAB)含量插层α-ZrP的复合物CTMAB-ZrP通过X射线粉末衍射(XRD),傅里叶变换红外(FTiR)光谱,透射电子显微镜(TEM),扫描电子显微镜(SEM)及氮气等温吸附对CTMAB-ZrP进行了表征,推测了CTMAB在磷酸锆层间的排列形式.CTMAB-ZrP吸附水中苯酚的实验结果表明,CTMAB-ZrP对苯酚的吸附量不仅与CTMAB的插入量和层内空间化阻有关,还与溶液的pH值密切相关.对苯酚、2-氯苯酚、2,4-二氯苯酚、对甲基苯酚及3,5-二甲基苯酚的吸附实验结果表明,CTMAB-ZrP对酚类化合物的吸附量与酚的疏水性成正相关,而与酚类化合物的酸性无关.Henry型和Freundlich型吸附等温方程都能很好地拟合CTMAB-ZrP对苯酚、2-氯苯酚和2,4-二氯苯酚的吸附过程,表明附及附主要是酚在插层复合物层间有机相中的分配作用所致.Cetyltrimethyl ammonium bromid （CTMAB）-ZrP complexes that contained different amounts of CTMAB that intercalate into a-zirconium phosphate were successfully prepared while methylamine weakened the interlayer forces in G-zirconium phosphate. The CTMAB-ZrP samples were characterized by Fourier transform infrared （FTIR） spectroscopy, X-ray diffraction （XRD）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, and N2 sorption isotherm analysis. We discuss the arrangement of CTMAB in the interlayers of zirconium phosphate according to the characterization results. The results of the adsorption of phenol by CTMAB-ZrP showed that the amount of phenol adsorption depended on the content of CTMAB in the complex, the interlayer steric hindrance, and the pH value of the solution. The adsorption of phenol, 2-chlorophenol, 2,4-dichlorophenol, p-methylphenol, and 3,5- dimethylphenol onto CTMAB-ZrP showed that the amount of adsorption correlated positively with the hydrophobicity of the phenols and it was not related to the acidity of the phenolic compounds. The sorption isotherms of phenol, 2-chlorophenol, and 2,4-dichlorophenol fit the Henry and Freundlich equations well. Therefore, the adsorption mechanism is mainly associated with the partition of different phenols in the organic phase of the intercalated CTMAB-ZrP.

关 键 词：α-ZrP 十六烷基三甲基溴化铵 酚 吸附 分配 

分 类 号：O614.412[理学—无机化学]