化工学报 ›› 2012, Vol. 63 ›› Issue (8): 2623-2628.doi: 10.3969/j.issn.0438-1157.2012.08.040

• 材料化学工程与纳米技术 • 上一篇    下一篇

P123辅助SB粉溶胶制备大孔径介孔γ-Al2O3及其对甲基蓝的强化吸附性能

汪泽华,蔡卫权,郭蕾,童亚超,胡玉珍   

  1. 武汉理工大学化学工程学院,湖北 武汉 430070
  • 收稿日期:2012-01-06 修回日期:2012-05-06 出版日期:2012-08-05 发布日期:2012-08-09
  • 通讯作者: 蔡卫权 E-mail:caiwq@whut.edu.cn
  • 基金资助:

    多孔γ-Al2O3基复合纳米强碱材料捕获CO2的基础研究;基于胶溶薄水铝石水热制备介孔氧化铝及其染料吸附性能;高分散负载型介孔金属氧化物强碱捕获CO2的基础研究;碳球辅助制备氧化镁空心微球及其酸性染料吸附性能

P123-assisted synthesis of enlarged mesoporous γ-Al2O3 from SB pseudoboehmite sol and its enhanced adsorption performance towards methyl blue

WANG Zehua,CAI Weiquan,GUO Lei,TONG Yachao,HU Yuzhen   

  • Received:2012-01-06 Revised:2012-05-06 Online:2012-08-05 Published:2012-08-09

摘要: 以硝酸解胶的工业拟薄水铝石SB粉溶胶为铝源、三嵌段共聚物P123为结构调节剂,采用溶剂蒸发诱导自组装法成功地制备了甲基蓝吸附性能显著增强的大孔径介孔γ-Al2O3。运用XRD、N2吸附-脱附、TEM和UV-Vis对比研究了水热预处理SB粉溶胶与否对产物结构、织构性质、形貌和甲基蓝吸附性能的影响。结果表明,所制备的大孔径介孔γ-Al2O3具有优异的甲基蓝吸附性能并满足Langmuir吸附等温式,吸附300 mg·L-1的甲基蓝溶液60 min和3000 mg·L-1的甲基蓝溶液150 min时,其平衡吸附量分别高达267、1500 mg·g-1,远高于同一条件下SB粉焙烧产物γ-Al2O3的平衡吸附量150、1080 mg·g-1;水热预处理能增加产物的比表面积并提高其对甲基蓝的吸附速率,但对其均匀的介孔结构和平衡吸附量无显著影响。本研究为介孔氧化铝用于废水中甲基蓝等染料的吸附提供了新的契机。

关键词: 溶剂蒸发诱导自组装;P123;水热预处理;介孔&gamma, -Al2O3;吸附;甲基蓝

Abstract: The enlarged mesoporous γ-Al2O3 with significant enhanced adsorption performance towards methyl blue was synthesized via the solvent evaporation-induced self-assembly method from SB pseudoboehmite sol peptized by nitric acid using triblock copolymer P123 as structure directing agent.The effects of hydrothermal pretreatment on the structure,textural properties,morphology of the as-prepared γ-Al2O3 and the adsorption performance towards methyl blue were studied by XRD,TEM,N2 adsorption and UV-Vis techniques.The results showed that the as-prepared mesoporous γ-Al2O3 had excellent adsorption performance towards methyl blue,and the adsorption fitted Langmuir isotherm well.Its equilibrium removal capacities were 267 and 1500 mg·g-1 respectively,when it adsorbed 300 mg·L-1 methyl blue solution for 60 min,and 3000 mg·L-1 methyl blue solution for 150 min,much higher than 150 and 1080 mg·g-1 respectively of the γ-Al2O3 obtained from SB.The results also showed that hydrothermal pretreatment could increase its specific surface area and adsorption rate towards methyl blue,while having no significant effects on the uniform mesoporous structure and equilibrium removal capacity of the mesoporous γ-Al2O3.This study offers new opportunity for mesoporous alumina in adsorption of dye,such as methyl blue from wastewater.

Key words: solvent evaporation-induced self-assembly;P123;hydrothermal pretreatment;mesoporous &gamma, -Al2O3;adsorption;methyl blue

中图分类号: 

  • TQ424.27
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