Oxide modified aluminum for removal of methyl orange and methyl blue in aqueous solution.

Autor: Xie S; Energy Materials & Physics Group, Department of Physics, Shanghai University Shanghai 200444 China zydeng@shu.edu.cn +86-21-66134334.; Institute of Low-Dimensional Carbon and Device Physics, Shanghai University Shanghai 200444 China., Yang Y; Energy Materials & Physics Group, Department of Physics, Shanghai University Shanghai 200444 China zydeng@shu.edu.cn +86-21-66134334.; Institute of Low-Dimensional Carbon and Device Physics, Shanghai University Shanghai 200444 China., Gai WZ; College of Physics and Electronic Information, Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang Normal University Luoyang 471934 China., Deng ZY; Energy Materials & Physics Group, Department of Physics, Shanghai University Shanghai 200444 China zydeng@shu.edu.cn +86-21-66134334.; Institute of Low-Dimensional Carbon and Device Physics, Shanghai University Shanghai 200444 China.; Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University 99 Shangda Road Shanghai 200444 China.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2021 Jan 04; Vol. 11 (2), pp. 867-875. Date of Electronic Publication: 2021 Jan 04 (Print Publication: 2020).
DOI: 10.1039/d0ra09048d
Abstrakt: In this work, pristine aluminum (Al) powder was soaked in deionized water for a time period and then it was dried and heat-treated at 400 °C such that a layer of fine Al 2 O 3 grains covered the Al particle surfaces, forming oxide modified Al powder (OM-Al). It was found that OM-Al greatly enhanced the efficiency in removing methyl orange (M-orange) and methyl blue (M-blue) in aqueous solution. The time to completely degrade M-orange and M-blue by OM-Al is about one third of that by pristine Al powder, and decreases with increasing dosage of OM-Al. The enhancement in dye removal rate by oxide modification is much better than that with ultrasonic assistance, especially for M-blue. LC/MS spectrum analyses revealed that large dye molecules are broken into small biodegradable organic molecules after reaction with OM-Al. It is deduced that the promotion of fine Al 2 O 3 on the hydration process of Al surface passive oxide film is the main mechanism responsible for the enhancement of dye removal by OM-Al. Furthermore, OM-Al has a good recyclability and 80% of M-orange and M-blue can be removed even when it was reused for up to three cycles. These results indicate that oxide modification is an effective way to activate Al for the removal of organic dyes.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
Externí odkaz: