介孔氧化铝的可控制备及优异除氟性能

发布时间：2018-02-28 03:32

  本文关键词： γ-AlO 介孔 吸附 氟离子去除 吸附动力学　出处：《材料导报》2017年06期 　论文类型：期刊论文

【摘要】：以偏铝酸钠(NaAlO_2)和氯化铝(AlCl_3·6H_2O)为铝源,葡萄糖(C_6H_(12)O_6·H_2O)为模板剂,采用水热及高温焙烧技术制备了不同晶型的氧化铝。用X射线衍射(XRD)、扫描电镜(SEM)、N2吸附脱附(BET)对制备产物的晶型、形貌及孔结构进行了表征。研究了不同晶型氧化铝对F-的吸附性能,结果表明550℃条件下的煅烧产物γ-Al_2O_3对F-的吸附效果最佳。吸附等温线结果表明介孔γ-Al_2O_3吸附F-为单层吸附,其Langmuir最大吸附容量为5.96mg/g。吸附动力学试验表明,介孔γ-Al_2O_3在5min内已吸附超过90%的F-,且吸附过程与准二级动力学模型相吻合。介孔γ-Al_2O_3吸附F-的机理涉及OH-与F-的离子交换。
[Abstract]:Alumina of different crystalline forms was prepared by hydrothermal and high-temperature roasting techniques, using NaAlO _ 2) and AlCl _ (3 路6H _ 2O) as aluminum source and glucose C6H _ (12) O _ (6 路H _ 2O) as template. The crystal types of the products were characterized by X-ray diffraction (XRDX) and SEM (SEMU / N _ 2 adsorption and desorption of BETs). The morphology and pore structure were characterized. The adsorption properties of different crystalline alumina for F- were studied. The results showed that the adsorption of F- by 纬 -Al2O3 at 550 鈩，

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