介孔氧化铝的结构调控及除氟性能研究
收稿日期: 2020-01-12
网络出版日期: 2020-06-12
基金资助
青海省自然科学基金项目(2018-ZJ-928Q);青海省盐湖资源化学重点实验室开放课题基金项目(2019-HYS-001);青海师范大学中青年教师科研基金项目;青海省高端创新人才“千人计划”项目
Research on structure regulation and fluorine removal property of mesoporous alumina
Received date: 2020-01-12
Online published: 2020-06-12
以铝酸钠（NaAlO2）和氯化铝（AlCl3·6H2O）为铝源,分别以葡萄糖、壳聚糖、十六烷基三甲基溴化铵（CTAB）为结构导向剂,采用水热反应和高温煅烧技术制备了纳米氧化铝粉体材料。用X射线衍射（XRD）、扫描电镜（SEM）、氮气吸附-脱附和傅里叶变换红外光谱（FT-IR）等手段对产物进行了表征。结果表明,产物均为介孔γ-氧化铝（γ-Al2O3）,呈纳米颗粒状形貌,分散较为均匀。其中,葡萄糖调控的γ-氧化铝具有较大的比面积（437 m 2/g）和孔体积（0.60 cm 3/g）。4种γ-氧化铝对氟离子（F -）的吸附结果表明,葡萄糖调控的γ-氧化铝除氟效果最好。
许乃才 , 史丹丹 , 黎四霞 . 介孔氧化铝的结构调控及除氟性能研究[J]. 无机盐工业, 2020 , 52(6) : 20 -23 . DOI: 10.11962/1006-4990.2019-0404
Nano-alumina powder materials were prepared by hydrothermal reaction and high-temperature calcination by using sodium aluminate（NaAlO2） and aluminum chloride（AlCl3·6H2O） as aluminum sources,and glucose,chitosan and CTAB as structure directing agents,respectively.The products were systematically characterized by the means of powder X-ray diffrac-tion（XRD）,scanning electron microscope（SEM）,N2 adsorption and desorption,and Fourier infrared spectroscopy（FT-IR）. Results showed that all the products were γ-Al2O3 with mesoporous structure,which presented the nanoparticles morphology and good dispersion. Among them,γ-Al2O3 which regulated by glucose has a large specific surface area（437 m2/g） and pore volume （0.60 cm3/g）.The adsorption results of four kinds of mesoporous γ-Al2O3 towards F- solution showed that the best defluorination effect was found in γ-Al2O3 adsorbent regulated by glucose.
Key words： mesoporous alumina; fluoride ions; adsorption; structure regulation; morphology
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