Sol–gel preparation of spherical γ-Al 2 O 3 with macro-mesopores as an efficient adsorbent for acid fuchsin

Micro & nano letters

article

Tiantian Zhang¹  Xiulan Xin¹  Hongqin Liu¹  Nan Song¹  Yan Wang¹  Yige Shi¹  Yuqing Cheng¹ 

[1] School of Light Industry, Beijing Technology and Business University

关键词: sol-gel processing;    nitrogen;    desorption;    X-ray diffraction;    mesoporous materials;    transmission electron microscopy;    adsorption;    ageing;    scanning electron microscopy;    thermal stability;    alumina;    organic compounds;    texture;    adsorption efficiency;    sol-gel preparation;    spherical γ-Al2O3;    macropores;    mesopores;    low bulk density;    larger pore size;    thermal stability;    higher strength;    nitrogen adsorption-desorption curve;    scanning electron microscopy;    transmission electron microscopy;    X-ray diffraction;    acid fuchsin solution adsorption;    ageing temperature;    hydrolysis temperature;    ageing time;    textural properties;    temperature 85.0 degC;    temperature 95.0 degC;    time 1.0 hour;    time 7.0 hour;    Al2O3;    N;   

DOI  :  10.1049/mnl.2020.0271

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Spherical gamma-alumina (γ-Al 2 O 3 ) has a wide range of applications in the field of adsorption due to its low bulk density, larger pore size, higher strength and thermal stability. In this study, spherical γ-Al 2 O 3 with macro-mesopores was prepared with isopropanol aluminium as the aluminium source via a sol–gel process. Spherical γ-Al 2 O 3 was characterised by means of nitrogen adsorption and desorption curve, scanning electron microscope, transmission electron microscope, X-ray diffraction and so on. The adsorption performance of the prepared spherical γ-Al 2 O 3 was studied by probe experiment of adsorption of acid fuchsin (AF) solution. The results showed that the spherical γ-Al 2 O 3 , which was prepared under the condition of hydrolysis time of 1 h, hydrolysis temperature of 85°C, ageing temperature of 95°C and ageing time of 7 h, had the strongest adsorption capacity for AF, and the adsorption efficiency could reach 96.24% in 40 mg/l AF solution. In addition, after six cycles of use, the spherical γ-Al 2 O 3 had no damage and the adsorption efficiency still could reach 88.40%. This work provides a feasible method for the preparation of spherical γ-Al 2 O 3 , and could also help to understand the connection between its textural properties and adsorption performance.

【 授权许可】

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