Open AccessSol–gel preparation of spherical γ‐Al 2 O 3 with macro‐mesopores as an efficient adsorbent for acid fuchsin
Author(s) -
Zhang Tiantian,
Xin Xiulan,
Liu Hongqin,
Song Nan,
Wang Yan,
Shi Yige,
Cheng Yuqing
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0271
Subject(s) - adsorption , mesoporous material , materials science , desorption , transmission electron microscopy , scanning electron microscope , aluminium , chemical engineering , specific surface area , analytical chemistry (journal) , composite material , chemistry , chromatography , nanotechnology , organic chemistry , catalysis , engineering
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.