分级多孔 γ-Al<sub>2</sub>O<sub>3</sub>空心微球微波水热法制备及其对刚果红的快速吸附

引用本文: 聂龙辉, 谭侨, 朱玮, 魏琪, 林志奎. 分级多孔 γ-Al₂O₃空心微球微波水热法制备及其对刚果红的快速吸附[J]. 物理化学学报, 2015, 31(9): 1815-1822. doi: 10.3866/PKU.WHXB201507201 shu

Citation: NIE Long-Hui, TAN Qiao, ZHU Wei, WEI Qi, LIN Zhi-Kui. Fast Adsorption Removal of Con Red on Hierarchically Porous γ-Al₂O₃ Hollow Microspheres Prepared by Microwave-Assisted Hydrothermal Method[J]. Acta Physico-Chimica Sinica, 2015, 31(9): 1815-1822. doi: 10.3866/PKU.WHXB201507201 shu

分级多孔 γ-Al₂O₃空心微球微波水热法制备及其对刚果红的快速吸附

聂龙辉 ^1,2, ,
谭侨 ^1, ,
朱玮 ^1, ,
魏琪 ^1, ,
林志奎 ^1,

基金项目:
国家自然科学基金(51572074) (51572074)

湖北省自然科学基金(2011CDB079) (2011CDB079)

湖北省大学生创新训练项目(201310500017) (201310500017)

中南民族大学催化与材料科学重点实验室开放基金(CHCL12003)资助 (CHCL12003)

摘要:

以KAl(SO₄)₂和尿素为前驱体, 通过微波水热法于180 ℃反应20 min, 经600 ℃ 焙烧2 h制得分级多孔γ-Al₂O₃空心微球. 所制备的样品被用于吸附典型有机染料刚果红(CR)溶液. 结果表明, 制备的γ-Al₂O₃空心微球直径为0.8-1.0 μm, 厚度约为200 nm. 此γ-Al₂O₃空心微球具有高的比表面积(243 m²·g^-1)和分级大孔-中孔结构,此结构非常有利于液相过程中的质量传递. 微波水热法制备的γ-Al₂O₃空心微球比水热法制备的γ-Al₂O₃和商用的γ-Al₂O₃样品显示出更快和更强的吸附性能. 此样品的吸附数据很好地符合假二级速率方程和Langmuir吸附理论模型. 从Langmuir吸附理论模型计算得到微波水热法制备的γ-Al₂O₃空心微球的最大吸附量(q_max) 25 ℃时高达 515.4 mg·g^-1. 由于具有分等级结构、高比表面积、大的孔容和吸附能力, 微波水热法制备的γ-Al₂O₃空心微球样品有望成为一种具有很好应用潜力的环境吸附剂.

关键词:

English

Fast Adsorption Removal of Con Red on Hierarchically Porous γ-Al₂O₃ Hollow Microspheres Prepared by Microwave-Assisted Hydrothermal Method

1.
1 School of Chemistry and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P. R. China;
2 The Synergistic Innovation Center of Catalysis Materials of Hubei Province, Wuhan 430068, P. R. China
Received Date: 03 April 2015
Available Online: 06 September 2015
Fund Project:
国家自然科学基金(51572074)

湖北省自然科学基金(2011CDB079)

湖北省大学生创新训练项目(201310500017)

中南民族大学催化与材料科学重点实验室开放基金(CHCL12003)资助

Abstract:

Hierarchical nanostructured γ-Al₂O₃ hollow microspheres were synthesized from KAl(SO₄)₂ and urea precursors by the microwave-assisted hydrothermal (MAH) method at 180 ℃ for 20 min followed by calcination at 600 ℃ for 2 h. The as-prepared sample was used to remove the organic dye Con red (CR) from aqueous solution. The results showed that the obtained γ-Al₂O₃ hollow microspheres are about 0.8-1.0 μm in diameter with a shell thickness of approximately 200 nm. The γ-Al₂O₃ hollow microspheres have a high surface area of 243 m²·g^-1 and a hierarchical meso-macroporous structure, which is beneficial for mass transfer in liquid processes. Therefore, the prepared γ-Al₂O₃ hollow microspheres exhibit faster adsorption and enhanced adsorption performance for CR than particles prepared by the hydrothermal method and commercial γ-Al₂O₃. The adsorption kinetic data follow the pseudo-second-order equation and the equilibrium data fit well to the Langmuir model. The maximum adsorption capacity (q_max) of the obtained γ-Al₂O₃ hollow microspheres calculated by the Langmuir model is up to 515.4 mg·g^-1 at 25 ℃. The γ-Al₂O₃ hollow microspheres prepared by the microwave-assisted hydrotherm method show promise as an adsorbent for environmental applications due to their hierarchical porous structure, high surface area, large pore volume, and adsorption capacity.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

分级多孔 γ-Al₂O₃空心微球微波水热法制备及其对刚果红的快速吸附

English

Fast Adsorption Removal of Con Red on Hierarchically Porous γ-Al₂O₃ Hollow Microspheres Prepared by Microwave-Assisted Hydrothermal Method

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

分级多孔 γ-Al2O3空心微球微波水热法制备及其对刚果红的快速吸附

English

Fast Adsorption Removal of Con Red on Hierarchically Porous γ-Al2O3 Hollow Microspheres Prepared by Microwave-Assisted Hydrothermal Method

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

分级多孔 γ-Al₂O₃空心微球微波水热法制备及其对刚果红的快速吸附

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