Preparation of a hierarchical flower-like γ-Al₂O₃@C composite exhibiting enhanced adsorption performance for congo red by high temperature transformation of γ-AlOOH@C precursors

A hierarchical flower-like γ-Al₂O₃@C composite was synthesized via a hydrothermal method combined with a heat treatment process using glucose and Al nanopowders as reactants. Herein, glucose plays key roles in the formation of the flower-like structure and carbon shell. Due to the high specific surf...

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Published inRSC advances Vol. 6; no. 1 p.61-64; pp. 61 - 64
Main Authors Fang, Beibei, Bao, Zepei, Lü, Lun, Zhao, Lijun, Wang, Huiyuan
Format Journal Article
LanguageEnglish
Published 01.01.2016
Subjects
adsorption
aluminum
aluminum oxide
aqueous solutions
carbon
glucose
hot water treatment
surface area
temperature
water treatment
water utilities
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Summary:A hierarchical flower-like γ-Al₂O₃@C composite was synthesized via a hydrothermal method combined with a heat treatment process using glucose and Al nanopowders as reactants. Herein, glucose plays key roles in the formation of the flower-like structure and carbon shell. Due to the high specific surface area of the flower-like γ-Al₂O₃@C composite (346.2 m² g⁻¹), its adsorption ability was investigated. The organic dye Congo Red (CR) was selected as a subject in the study. Over 90% of CR could be removed from aqueous solution within 5 min, and the final adsorption capacity reaches 244.5 mg g⁻¹ which is much higher than most γ-AlOOH and γ-Al₂O₃ materials reported before, indicating it would be a promising material used in the water treatment industry.
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ISSN:2046-2069
2046-2069
DOI:10.1039/c5ra18339a